add local weather, chart activity and fix orientation bug

float parsing with null check and nan as default

.idea/dictionaries/weatherstation.xml

@@ -0,0 +1,12 @@
+<component name="ProjectDictionaryState">
+  <dictionary name="weatherstation">
+    <words>
+      <w>appid</w>
+      <w>dateandtime</w>
+      <w>openweathermap</w>
+      <w>ssid</w>
+      <w>weseng</w>
+      <w>wifiweatherstation</w>
+    </words>
+  </dictionary>
+</component>

.idea/misc.xml

@@ -1,5 +1,40 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="NullableNotNullManager">
+    <option name="myDefaultNullable" value="org.jetbrains.annotations.Nullable" />
+    <option name="myDefaultNotNull" value="androidx.annotation.RecentlyNonNull" />
+    <option name="myNullables">
+      <value>
+        <list size="10">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
+          <item index="2" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
+          <item index="3" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
+          <item index="4" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.Nullable" />
+          <item index="6" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNullable" />
+          <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />
+          <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
+          <item index="9" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
+        </list>
+      </value>
+    </option>
+    <option name="myNotNulls">
+      <value>
+        <list size="9">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
+          <item index="4" class="java.lang.String" itemvalue="androidx.annotation.NonNull" />
+          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNonNull" />
+          <item index="6" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.NonNull" />
+          <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullDecl" />
+          <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullType" />
+        </list>
+      </value>
+    </option>
+  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>

app/build.gradle

@@ -6,8 +6,8 @@ android {
         applicationId "de.weseng.wifiweatherstation"
         minSdkVersion 26
         targetSdkVersion 28
-        versionCode 20190310
+        versionCode 20190317
-        versionName "2019.3.10"
+        versionName "2019.3.17"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
@@ -18,6 +18,10 @@ android {
     }
 }
 
+repositories {
+    maven { url 'https://jitpack.io' }
+}
+
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'com.android.support:appcompat-v7:28.0.0'
@@ -27,4 +31,5 @@ dependencies {
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
     implementation 'com.android.support:design:28.0.0'
+    implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0-alpha'
 }

app/src/main/AndroidManifest.xml

@@ -2,11 +2,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     package="de.weseng.wifiweatherstation">
-
     <!-- To auto-complete the email text field in the login form with the user's emails -->
     <uses-permission android:name="android.permission.GET_ACCOUNTS" />
-    <!--<uses-permission android:name="android.permission.READ_PROFILE" />-->
+    <!-- <uses-permission android:name="android.permission.READ_PROFILE" /> -->
-    <!--<uses-permission android:name="android.permission.READ_CONTACTS" />--> <!-- for email completions -->
+    <!-- <uses-permission android:name="android.permission.READ_CONTACTS" /> --> <!-- for email completions -->
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <!-- or ACCESS_FINE_LOCATION for SSID -->
@@ -24,7 +23,7 @@
         <activity
             android:name=".LoginActivity"
             android:label="@string/app_name"
-            android:noHistory="true"> <!--android:label="@string/title_activity_login"-->
+            android:noHistory="true"> <!-- android:label="@string/title_activity_login" -->
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
@@ -33,7 +32,8 @@
         </activity>
         <activity
             android:name=".MainNativeActivity"
-            android:label="@string/app_name">
+            android:label="@string/app_name"
+            android:configChanges="orientation|screenSize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
             </intent-filter>
@@ -43,6 +43,11 @@
                 <action android:name="android.intent.action.MAIN" />
             </intent-filter>
         </activity>
+        <activity android:name=".DetailActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+            </intent-filter>
+        </activity>
         <activity
             android:name=".SettingsActivity"
             android:parentActivityName=".MainActivity" />

app/src/main/java/de/weseng/wifiweatherstation/CenteredImageSpan.java

@@ -0,0 +1,79 @@
+package de.weseng.wifiweatherstation;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.support.annotation.NonNull;
+import android.text.style.ImageSpan;
+
+import java.lang.ref.WeakReference;
+
+public class CenteredImageSpan extends ImageSpan {
+    private WeakReference<Drawable> mDrawableRef;
+
+    CenteredImageSpan(Context context, final int drawableRes) {
+        super(context, drawableRes);
+    }
+
+    @Override
+    public int getSize(@NonNull Paint paint, CharSequence text,
+                       int start, int end,
+                       Paint.FontMetricsInt fm) {
+        Drawable d = getCachedDrawable();
+        Rect rect = d.getBounds();
+
+        float drawableHeight = rect.height();
+        if (fm != null) {
+            Paint.FontMetricsInt pfm = paint.getFontMetricsInt();
+            float fontHeight = pfm.descent - pfm.ascent;
+            int paintOversizeHalf = (int) (drawableHeight/2-fontHeight*1.25);
+
+            // keep it the same as paint's fm plus some space
+            fm.ascent = pfm.ascent - paintOversizeHalf;
+            fm.descent = pfm.descent + paintOversizeHalf;
+            fm.top = pfm.top;
+            fm.bottom = pfm.bottom;
+        }
+
+        return rect.right;
+    }
+
+    @Override
+    public void draw(@NonNull Canvas canvas, CharSequence text,
+                     int start, int end, float x,
+                     int top, int y, int bottom, @NonNull Paint paint) {
+        Drawable b = getCachedDrawable();
+        canvas.save();
+
+        int drawableHeight = b.getIntrinsicHeight();
+        int fontAscent = paint.getFontMetricsInt().ascent;
+        int fontDescent = paint.getFontMetricsInt().descent;
+
+        Paint.FontMetricsInt pfm = paint.getFontMetricsInt();
+        int fontHeightRelativeCorrection = (int) ((pfm.descent - pfm.ascent)/5.0);
+
+        int transY = bottom - b.getBounds().bottom +  // align bottom to bottom
+                (drawableHeight - fontDescent + fontAscent) / 2 - fontHeightRelativeCorrection;  // align center to center
+        canvas.translate(x, transY);
+        b.draw(canvas);
+        canvas.restore();
+    }
+
+    // Redefined locally because it is a private member from DynamicDrawableSpan
+    private Drawable getCachedDrawable() {
+        WeakReference<Drawable> wr = mDrawableRef;
+        Drawable d = null;
+
+        if (wr != null)
+            d = wr.get();
+
+        if (d == null) {
+            d = getDrawable();
+            mDrawableRef = new WeakReference<>(d);
+        }
+
+        return d;
+    }
+}

app/src/main/java/de/weseng/wifiweatherstation/DetailActivity.java

@@ -0,0 +1,287 @@
+package de.weseng.wifiweatherstation;
+
+import android.content.Intent;
+import android.graphics.Color;
+import android.graphics.Typeface;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.util.Log;
+
+import com.github.mikephil.charting.charts.LineChart;
+import com.github.mikephil.charting.components.Legend;
+import com.github.mikephil.charting.components.XAxis;
+import com.github.mikephil.charting.components.YAxis;
+import com.github.mikephil.charting.data.Entry;
+import com.github.mikephil.charting.data.LineData;
+import com.github.mikephil.charting.data.LineDataSet;
+import com.github.mikephil.charting.formatter.IFillFormatter;
+import com.github.mikephil.charting.interfaces.dataprovider.LineDataProvider;
+import com.github.mikephil.charting.interfaces.datasets.ILineDataSet;
+import com.github.mikephil.charting.utils.ColorTemplate;
+
+import java.util.ArrayList;
+
+public class DetailActivity extends AppCompatActivity {
+    private final String TAG = getClass().getSimpleName();
+    private LineChart chart;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_detail);
+
+        Intent intent = getIntent();
+        ArrayList<String> dataList1 = intent.getStringArrayListExtra("temperature");
+        ArrayList<String> dataList2 = intent.getStringArrayListExtra("humidity");
+        Log.d(TAG, "dataList1: " + dataList1);
+        Log.d(TAG, "dataList2: " + dataList2);
+
+        chart = findViewById(R.id.chart1);
+
+        // background color for the whole view
+        //chart.setBackgroundColor(Color.TRANSPARENT);
+
+        // background color for the chart area
+        //chart.setDrawGridBackground(true);
+        //chart.setGridBackgroundColor(Color.TRANSPARENT);
+
+        // disable description text
+        chart.getDescription().setEnabled(false);
+
+        // enable touch gestures, default true
+        //chart.setTouchEnabled(false);
+
+        // enable dragging (default true) and scaling (default true)
+        //chart.setDragEnabled(false);
+        //chart.setScaleEnabled(false);
+        //chart.setScaleXEnabled(false);
+        chart.setScaleYEnabled(false);
+
+        // force pinch zoom along both axis (default false)
+        //chart.setPinchZoom(true);
+
+        // animates the rendering of the chart
+        chart.animateX(1000);
+        //chart.animateY(1500);
+        //chart.animateXY(1500, 1500);
+
+        {   // x axis
+
+            XAxis xAxis = chart.getXAxis();
+            //xAxis.setTypeface(tfLight);
+            //xAxis.setTextSize(11f);
+            xAxis.setDrawLabels(false);
+            //xAxis.setTextColor(Color.LTGRAY);
+            xAxis.setDrawGridLines(false);
+            xAxis.setDrawAxisLine(false);
+        }
+
+        {   // y axis
+
+            //YAxis yAxis = chart.getAxisLeft();
+
+            // disable dual axis (only use LEFT axis)
+            //chart.getAxisRight().setEnabled(false);
+
+            //leftAxis.setTypeface(tfLight);
+            //yAxis.setTextColor(ColorTemplate.getHoloBlue());
+            //yAxis.setAxisMinimum(12f);
+            //yAxis.setAxisMaximum(30f);
+            //yAxis.setDrawGridLines(true);
+
+            // horizontal grid lines
+            //yAxis.enableGridDashedLine(10f, 10f, 0f);
+
+            //yAxis.setGranularityEnabled(true);
+        }
+
+
+        {   // y axis left
+
+            YAxis leftAxis = chart.getAxisLeft();
+            leftAxis.setTypeface(Typeface.DEFAULT_BOLD);
+            leftAxis.setTextColor(MainNativeActivity.red.toArgb());
+            leftAxis.setAxisMinimum(12);
+            leftAxis.setAxisMaximum(30);
+            leftAxis.setDrawGridLines(true);
+            leftAxis.setGranularityEnabled(true);
+        }
+
+        {   // y axis right
+            YAxis rightAxis = chart.getAxisRight();
+            rightAxis.setTypeface(Typeface.DEFAULT_BOLD);
+            rightAxis.setTextColor(ColorTemplate.getHoloBlue());
+            rightAxis.setAxisMinimum(20);
+            rightAxis.setAxisMaximum(80);
+            //rightAxis.setDrawGridLines(false);
+            //rightAxis.setDrawZeroLine(false);
+            //rightAxis.setGranularityEnabled(false);
+        }
+
+        setData(dataList1, getString(R.string.temperature), dataList2, getString(R.string.humidity));
+
+        {   // ### Legend ###
+
+            // get the legend (only possible after setting data)
+            Legend l = chart.getLegend();
+
+            // draw legend entries as lines, default square
+            l.setForm(Legend.LegendForm.LINE);
+
+            l.setTypeface(Typeface.DEFAULT_BOLD);
+            //l.setTextSize(11f);
+            l.setTextColor(Color.LTGRAY);
+
+            // position, default: bottom left
+            //l.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
+            //l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.LEFT);
+
+            // default horizontal
+            //l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
+
+            // default false
+            //l.setDrawInside(true);
+
+            //l.setYOffset(11f);
+        }
+
+    }
+
+    private void setData(ArrayList<String> dataList1, String label1,
+                         ArrayList<String> dataList2, String label2) {
+        int n;
+
+        n = dataList1.size();
+        ArrayList<Entry> values1 = new ArrayList<>();
+        if (n > 0) {
+            for (int i = 0; i < n; i++) {
+                float val = Float.parseFloat(dataList1.get(i));
+                values1.add(new Entry(i, val));
+            }
+        }
+
+        n = dataList2.size();
+        ArrayList<Entry> values2 = new ArrayList<>();
+        if (n > 0) {
+            for (int i = 0; i < n; i++) {
+                float val = Float.parseFloat(dataList2.get(i));
+                values2.add(new Entry(i, val));
+            }
+        }
+
+
+        // create a DataSet and give it a type
+        LineDataSet set1 = new LineDataSet(values1, label1);
+        set1.setAxisDependency(YAxis.AxisDependency.LEFT);
+
+        {   // ### Lines ###
+
+            //set1.setColor(Color.BLACK);
+            set1.setColor(MainNativeActivity.red.toArgb());
+            //set1.setColor(ColorTemplate.getHoloBlue());
+
+            // line thickness (min = 0.2f, max = 10f, default 1f)
+            //set1.setLineWidth(1f);
+
+            // draw dashed line, see also legend
+            //set1.enableDashedLine(10f, 5f, 0f);
+
+            // set interpolation
+            //set1.setMode(LineDataSet.Mode.STEPPED);
+            //set1.setMode(LineDataSet.Mode.LINEAR);
+            //set1.setMode(LineDataSet.Mode.CUBIC_BEZIER);
+            //set1.setMode(LineDataSet.Mode.HORIZONTAL_BEZIER);
+        }
+
+        {   // ### Points ###
+
+            // points, circles over the data point, def: true
+            //set1.setDrawCircles(false);
+
+            //set1.setCircleColor(Color.BLACK);
+            set1.setCircleColor(MainNativeActivity.red.toArgb());
+
+            // point size (default radius = 4f, min = 1f)
+            //set1.setCircleRadius(3f);
+
+            // icons over the data point, def: false
+            //set1.setDrawIcons(false);
+
+            // false to draw points as solid circles (default true)
+            set1.setDrawCircleHole(false);
+        }
+
+        {   // ### Values ###
+
+            // values over the data point, def: true
+            set1.setDrawValues(false);
+
+            // text size of values
+            //set1.setValueTextSize(9f);
+        }
+
+        {   // ### Legend ###
+
+            //set1.setFormLineWidth(1f);
+            //set1.setFormLineDashEffect(new DashPathEffect(new float[]{10f, 5f}, 0f));
+            //set1.setFormSize(15.f);
+        }
+
+        // draw selection line as dashed
+        set1.setHighLightColor(Color.LTGRAY);
+        //set1.enableDashedHighlightLine(10f, 5f, 0f);
+
+        {   // ### Filled area ###
+
+            // set the filled area
+            //set1.setDrawFilled(true);
+            set1.setFillFormatter(new IFillFormatter() {
+                @Override
+                public float getFillLinePosition(ILineDataSet dataSet, LineDataProvider dataProvider) {
+                    return chart.getAxisLeft().getAxisMinimum();
+                }
+            });
+
+            // set color of filled area
+            set1.setFillColor(MainNativeActivity.red.toArgb());
+            //if (Utils.getSDKInt() >= 18) {
+            //    // drawables only supported on api level 18 and above
+            //    Drawable drawable = ContextCompat.getDrawable(this, R.drawable.fade_red);
+            //    set1.setFillDrawable(drawable);
+            //} else {
+            //    set1.setFillColor(Color.BLACK);
+            //}
+        }
+
+
+        LineDataSet set2 = new LineDataSet(values2, label2);
+        set2.setAxisDependency(YAxis.AxisDependency.RIGHT);
+        set2.setColor(ColorTemplate.getHoloBlue());
+        set2.setCircleColor(ColorTemplate.getHoloBlue());
+        //set2.setCircleColor(MainNativeActivity.red.toArgb());
+        set2.setDrawCircleHole(false);
+        set2.setDrawValues(false);
+        set2.setHighLightColor(Color.LTGRAY);
+        //set2.setDrawFilled(true);
+        set2.setFillFormatter(new IFillFormatter() {
+            @Override
+            public float getFillLinePosition(ILineDataSet dataSet, LineDataProvider dataProvider) {
+                return chart.getAxisRight().getAxisMinimum();
+            }
+        });
+
+
+        ArrayList<ILineDataSet> dataSets = new ArrayList<>();
+        dataSets.add(set1); // add the data sets
+        dataSets.add(set2); // add the data sets
+
+        // create a data object with the data sets
+        LineData data = new LineData(dataSets);
+
+        //data.setValueTextColor(Color.WHITE);
+        //data.setValueTextSize(9f);
+
+        // set data
+        chart.setData(data);
+    }
+}

app/src/main/java/de/weseng/wifiweatherstation/MainNativeActivity.java

@@ -1,6 +1,8 @@
 package de.weseng.wifiweatherstation;
 
+import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Color;
@@ -8,6 +10,9 @@ import android.os.AsyncTask;
 import android.os.Build;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.text.Html;
+import android.text.Spannable;
+import android.text.SpannableStringBuilder;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.Menu;
@@ -22,20 +27,38 @@ import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Locale;
+import java.util.Map;
 import java.util.concurrent.locks.Condition;
 import java.util.concurrent.locks.ReentrantLock;
 
 import static de.weseng.wifiweatherstation.SettingsActivity.PREFS_NAME;
+import static java.lang.Math.pow;
 
 public class MainNativeActivity extends AppCompatActivity {
     private final String TAG = getClass().getSimpleName();
+
+    static Color green = Color.valueOf(0x71ff5f);
+    static Color red = Color.valueOf(0xffd1655d);
+    static Color blue = Color.valueOf(Color.rgb(113, 157, 195));
+
     private int pBarLockCount = 0;
     // In Android 4.4 (API 19) AsyncTask MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1; (maximum number of threads)
     ArrayList<AsyncTask<String, Void, Void>> endlessTasks = new ArrayList<>();
 
+    ArrayList<String> dataListStringTemp1 = new ArrayList<>();
+    ArrayList<String> dataListStringTemp2 = new ArrayList<>();
+    ArrayList<String> dataListStringTemp3 = new ArrayList<>();
+    ArrayList<String> dataListStringHumidity1 = new ArrayList<>();
+    ArrayList<String> dataListStringHumidity2 = new ArrayList<>();
+    ArrayList<String> dataListStringHumidity3 = new ArrayList<>();
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -45,36 +68,48 @@ public class MainNativeActivity extends AppCompatActivity {
         String urlLocal = settings.getString("urlLocal", getString(R.string.url_local));
         String urlGlobal = settings.getString("urlGlobal", getString(R.string.url_global));
 
-        if (savedInstanceState == null) {
+        TableLayout tr1 = findViewById(R.id.tableRow1);
-            TableLayout tr1 = findViewById(R.id.tableRow1);
+        tr1.setOnClickListener(new View.OnClickListener() {
-            tr1.setOnClickListener(new View.OnClickListener() {
+            @Override
-                @Override
+            public void onClick(View v) {
-                public void onClick(View v) {
+                Intent intent = new Intent(MainNativeActivity.this, DetailActivity.class);
-                    // TODO: do your logic here
+                intent.putExtra("temperature", dataListStringTemp1);
-                }
+                intent.putExtra("humidity", dataListStringHumidity1);
-            });
+                startActivity(intent);
-            TableLayout tr2 = findViewById(R.id.tableRow2);
+            }
-            tr2.setOnClickListener(new View.OnClickListener() {
+        });
-                @Override
+        TableLayout tr2 = findViewById(R.id.tableRow2);
-                public void onClick(View v) {
+        tr2.setOnClickListener(new View.OnClickListener() {
-                    // TODO: do your logic here
+            @Override
-                }
+            public void onClick(View v) {
-            });
+                Intent intent = new Intent(MainNativeActivity.this, DetailActivity.class);
-            TableLayout tr3 = findViewById(R.id.tableRow3);
+                intent.putExtra("temperature", dataListStringTemp2);
-            tr3.setOnClickListener(new View.OnClickListener() {
+                intent.putExtra("humidity", dataListStringHumidity2);
-                @Override
+                startActivity(intent);
-                public void onClick(View v) {
+            }
-                    // TODO: do your logic here
+        });
-                }
+        TableLayout tr3 = findViewById(R.id.tableRow3);
-            });
+        tr3.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(MainNativeActivity.this, DetailActivity.class);
+                intent.putExtra("temperature", dataListStringTemp3);
+                intent.putExtra("humidity", dataListStringHumidity3);
+                startActivity(intent);
+            }
+        });
 
+        TextView tv = findViewById(R.id.textViewWeatherOutdoor);
+        tv.setText(Html.fromHtml(getString(R.string.weather_outdoor), Html.FROM_HTML_MODE_COMPACT));
+
+        if (savedInstanceState == null) {
             String urlPre = "";
             if (SettingsActivity.isLocal(getApplicationContext())) {
                 //Toast.makeText(getApplicationContext(), "intern", Toast.LENGTH_LONG).show();
                 if (urlLocal != null && urlLocal.length() > 0)
                     urlPre = urlLocal.substring(urlLocal.length() - 1).equals("/") ? urlLocal : urlLocal + "/";
             } else {
-                //Toast.makeText(getApplicationContext(), "extern", Toast.LENGTH_LONG).show();
+                //Toast.makeText(getApplicationContext(), "external", Toast.LENGTH_LONG).show();
                 if (urlGlobal != null && urlGlobal.length() > 0)
                     urlPre = urlGlobal.substring(urlGlobal.length() - 1).equals("/") ? urlGlobal : urlGlobal + "/";
             }
@@ -85,18 +120,20 @@ public class MainNativeActivity extends AppCompatActivity {
             executeAsyncTask(new GetData(R.id.textViewTemperatureValue3, R.id.textViewHumidityValue3),
                     urlPre + "api.php?host=192.168.1.73&last");
 
+            executeAsyncTask(new OpenWeatherMap(R.id.textViewWeatherOutdoor), urlPre + "openweathermap/api.php");
+
             endlessTasks.add(new GetData(R.id.textViewTemperatureValue1, R.id.textViewHumidityValue1,
                             R.id.textViewTemperatureMin1, R.id.textViewTemperatureMax1, R.id.textViewTemperatureDelta1,
                             R.id.textViewHumidityMin1, R.id.textViewHumidityMax1, R.id.textViewHumidityDelta1,
-                            true));
+                            true, dataListStringTemp1, dataListStringHumidity1));
             endlessTasks.add(new GetData(R.id.textViewTemperatureValue2, R.id.textViewHumidityValue2,
                             R.id.textViewTemperatureMin2, R.id.textViewTemperatureMax2, R.id.textViewTemperatureDelta2,
                             R.id.textViewHumidityMin2, R.id.textViewHumidityMax2, R.id.textViewHumidityDelta2,
-                            true));
+                            true, dataListStringTemp2, dataListStringHumidity2));
             endlessTasks.add(new GetData(R.id.textViewTemperatureValue3, R.id.textViewHumidityValue3,
                             R.id.textViewTemperatureMin3, R.id.textViewTemperatureMax3, R.id.textViewTemperatureDelta3,
                             R.id.textViewHumidityMin3, R.id.textViewHumidityMax3, R.id.textViewHumidityDelta3,
-                            true));
+                            true, dataListStringTemp3, dataListStringHumidity3));
             executeAsyncTask(endlessTasks.get(0), urlPre + "api.php?host=192.168.1.71&day");
             executeAsyncTask(endlessTasks.get(1), urlPre + "api.php?host=192.168.1.72&day");
             executeAsyncTask(endlessTasks.get(2), urlPre + "api.php?host=192.168.1.73&day");
@@ -148,6 +185,8 @@ public class MainNativeActivity extends AppCompatActivity {
         return super.onKeyDown(keyCode, event);
     }
 
+    @SuppressLint("ObsoleteSdkInt")
+    @SafeVarargs
     @TargetApi(Build.VERSION_CODES.HONEYCOMB) // API 11
     public static <T> void executeAsyncTask(AsyncTask<T, ?, ?> asyncTask, T... params) {
         if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
@@ -159,6 +198,7 @@ public class MainNativeActivity extends AppCompatActivity {
     /**
      * Async task class to get json by making HTTP call
      */
+    @SuppressLint("StaticFieldLeak")
     private class GetData extends AsyncTask<String, Void, Void> {
         String TAG = getClass().getSimpleName();
         private ProgressBar pBar;
@@ -178,6 +218,9 @@ public class MainNativeActivity extends AppCompatActivity {
         private final Condition tryAgain = lock.newCondition();
         private volatile boolean finished = false;
 
+        ArrayList<String> dataListString1 = new ArrayList<>();
+        ArrayList<String> dataListString2 = new ArrayList<>();
+
         GetData(int v1, int v2) {
             this.v1 = v1;
             this.v2 = v2;
@@ -202,6 +245,12 @@ public class MainNativeActivity extends AppCompatActivity {
             this.endless = endless;
             pBarLockCount -= 1;  // do not count for endless tasks, pBarSmall is used
         }
+        GetData(int v1, int v2, int min1, int max1, int delta1, int min2, int max2, int delta2, boolean endless,
+                ArrayList<String> dataListString1, ArrayList<String> dataListString2) {
+            this(v1, v2, min1, max1, delta1, min2, max2, delta2, endless);
+            this.dataListString1 = dataListString1;
+            this.dataListString2 = dataListString2;
+        }
 
         @Override
         protected void onPreExecute() {
@@ -228,7 +277,7 @@ public class MainNativeActivity extends AppCompatActivity {
                 lock.lock();
                 do {
                     getJsonOverHttpData(params);
-                    publishProgress();
+                    publishProgress();  // goes to onProgressUpdate
                     tryAgain.awaitUninterruptibly();
                     //terminateTask();
                 } while(!finished);
@@ -250,7 +299,7 @@ public class MainNativeActivity extends AppCompatActivity {
         }
 
         void getJsonOverHttpData(String... params) {
-            // URL to get contacts JSON
+            // URL to get data JSON
             String url = params[0];
 
             HttpHandler sh = new HttpHandler();
@@ -268,6 +317,7 @@ public class MainNativeActivity extends AppCompatActivity {
                     //JSONArray data = jsonObj.getJSONArray("contacts");
 
                     JSONArray data = new JSONArray(jsonStr);
+                    dataList.clear();
 
                     // looping through all data
                     for (int i = 0; i < data.length(); i++) {
@@ -324,43 +374,51 @@ public class MainNativeActivity extends AppCompatActivity {
             if (n > 0) {
                 HashMap<String, String> hm = dataList.get(n - 1);
 
-                float temp = Float.parseFloat(hm.get("temperature"));
+                String temp, humidity;
-                String temperature = String.format(Locale.getDefault(), "%.1f", temp);
+                float tempF = Float.NaN, humidityF = Float.NaN;
 
-                float humi = Float.parseFloat(hm.get("humidity"));
+                temp = hm.get("temperature");
-                String humidity = String.format(Locale.getDefault(), "%.1f", humi);
+                if (temp != null) tempF = Float.parseFloat(temp);
+                temp = String.format(Locale.getDefault(), "%.1f", tempF);
 
-                Color green = Color.valueOf(0x71ff5f);
+                humidity = hm.get("humidity");
-                Color red = Color.valueOf(0xffd1655d);
+                if (humidity != null) humidityF = Float.parseFloat(humidity);
-                Color blue = Color.valueOf(Color.rgb(113, 157, 195));
+                humidity = String.format(Locale.getDefault(), "%.1f", humidityF);
 
                 Color textColor;
 
-                textColor = valueToColor(temp, 17, 19, 23, 25, blue, green, red);
+                textColor = valueToColor(tempF, 17, 19, 23, 25, blue, green, red);
                 TextView tv1 = findViewById(v1);
-                tv1.setText(temperature);
+                tv1.setText(temp);
                 tv1.setTextColor(textColor.toArgb());
 
-                textColor = valueToColor(humi, 25, 40, 60, 75, red, green, blue);
+                textColor = valueToColor(humidityF, 25, 40, 60, 75, red, green, blue);
                 TextView tv2 = findViewById(v2);
                 tv2.setText(humidity);
                 tv2.setTextColor(textColor.toArgb());
 
                 if (idMin1 != 0) {
-                    float min1 = 100, max1 = 0, val1;
+                    float min1 = 100, max1 = 0, val1 = Float.NaN;
-                    float min2 = 100, max2 = 0, val2;
+                    float min2 = 100, max2 = 0, val2 = Float.NaN;
+                    dataListString1.clear();
+                    dataListString2.clear();
+                    String valString1, valString2;
                     for (int i = 0; i < n; i++) {
                         hm = dataList.get(i);
-                        val1 = Float.parseFloat(hm.get("temperature"));
+                        valString1 = hm.get("temperature");
-                        if (val1 < min1)
+                        if (valString1 != null)
-                            min1 = val1;
+                            val1 = Float.parseFloat(valString1);
-                        if (val1 > max1)
+                        valString2 = hm.get("humidity");
-                            max1 = val1;
+                        if (valString2 != null)
-                        val2 = Float.parseFloat(hm.get("humidity"));
+                            val2 = Float.parseFloat(valString2);
-                        if (val2 < min2)
+                        if (val2 <= 100 && val2 >= 0) {
-                            min2 = val2;
+                            dataListString1.add(valString1);
-                        if (val2 > max2)
+                            dataListString2.add(valString2);
-                            max2 = val2;
+                            if (val1 < min1) min1 = val1;
+                            if (val1 > max1) max1 = val1;
+                            if (val2 < min2) min2 = val2;
+                            if (val2 > max2) max2 = val2;
+                        }
                     }
                     TextView tv;
                     tv = findViewById(idMin1);
@@ -418,6 +476,369 @@ public class MainNativeActivity extends AppCompatActivity {
 
     }
 
+    /**
+     * Async task class to get json by making HTTP call
+     */
+    @SuppressLint("StaticFieldLeak")
+    private class OpenWeatherMap extends AsyncTask<String, Void, Void> {
+        String TAG = getClass().getSimpleName();
+        private ProgressBar pBar;
+
+        // OpenWeatherMap API
+        String url = "http://api.openweathermap.org/data/2.5/weather";
+
+        // APPID (API key)
+        String APPID = "f66f296d1ced9a6121998493b84fbaeb";
+
+        // Location id
+        int id = 2850872;
+
+        // Units
+        String units = "metric";
+
+        // Language
+        String lang = "de";
+
+        ArrayList<HashMap<String, String>> dataList = new ArrayList<>();
+
+        int v;
+
+        /*
+         * Properties to run endless
+         */
+        boolean endless = false;
+        private ProgressBar pBarSmall;
+        private final ReentrantLock lock = new ReentrantLock();
+        private final Condition tryAgain = lock.newCondition();
+        private volatile boolean finished = false;
+
+        OpenWeatherMap(int v) {
+            this.v = v;
+            pBarLockCount += 1;
+        }
+
+        /*
+         * Constructor to run endless
+         */
+//        OpenWeatherMap(int v, boolean endless) {
+//            this(v);
+//            this.endless = endless;
+//            pBarLockCount -= 1;  // do not count for endless tasks, pBarSmall is used
+//        }
+
+        @Override
+        protected void onPreExecute() {
+            super.onPreExecute();
+            // Showing progress bar
+            pBar = findViewById(R.id.progressBar);
+            if (pBar.getVisibility() == View.INVISIBLE) {
+                pBar.setVisibility(View.VISIBLE);
+            }
+            if (endless) {
+                // Showing progress bar
+                pBarSmall = findViewById(R.id.progressBarSmall);
+                if (pBarSmall.getVisibility() == View.INVISIBLE) {
+                    pBarSmall.setVisibility(View.VISIBLE);
+                }
+            }
+        }
+
+        @Override
+        protected Void doInBackground(String... params) {
+            if(!endless)
+                getJsonOverHttpData(params);
+            else{
+                lock.lock();
+                do {
+                    getJsonOverHttpData(params);
+                    publishProgress();  // goes to onProgressUpdate
+                    tryAgain.awaitUninterruptibly();
+                    //terminateTask();
+                } while(!finished);
+                lock.unlock();
+            }
+
+            return null;
+        }
+
+        @Override
+        protected void onPostExecute(Void result) {
+            super.onPostExecute(result);
+            pBarLockCount -= 1;
+            // Dismiss the progress bar
+            if (pBar.getVisibility() == View.VISIBLE && pBarLockCount == 0) {
+                pBar.setVisibility(View.GONE);
+            }
+            updateViews();
+        }
+
+        void getJsonOverHttpData(String... params) {
+            // URL to get data JSON
+            if (params.length > 0)
+                url = params[0];  // overwrite openweathermap url with given url
+            else {
+                Map<String, Object> query = new LinkedHashMap<>();
+                query.put("APPID", APPID);
+                query.put("id", id);
+                query.put("units", units);
+                query.put("lang", lang);
+                Log.d(TAG, url + "?" + URLBuilder.httpBuildQuery(query, "UTF-8"));
+            }
+
+            HttpHandler sh = new HttpHandler();
+
+            // Making a request to url and getting response
+            String jsonStr = sh.makeServiceCall(url);
+
+            Log.d(TAG, "Response from url: " + jsonStr);
+
+            if (jsonStr != null) {
+                try {
+                    dataList.clear();
+
+                    JSONObject jsonObj = new JSONObject(jsonStr);
+                    String name = jsonObj.getString("name");                                  // City name
+                    String dt = jsonObj.getString("dt");                                      // Time of data calculation, unix, UTC
+
+                    JSONObject weather = jsonObj.getJSONArray("weather").getJSONObject(0);
+                    String weatherId = weather.getString("id");                               // Weather condition id
+                    String weatherDescription = weather.getString("description");             // Weather condition within the group
+                    String weatherIcon = weather.getString("icon");                           // Weather icon id
+
+                    JSONObject main = jsonObj.getJSONObject("main");
+                    String mainTemp = main.getString("temp");                                 // Temperature. Unit Default: Kelvin, Metric: Celsius, Imperial: Fahrenheit.
+                    String mainTempMin = main.getString("temp_min");                          // Minimum temperature at the moment. This is deviation from current temp that is possible for large cities and megalopolises geographically expanded (use these parameter optionally). Unit Default: Kelvin, Metric: Celsius, Imperial: Fahrenheit.
+                    String mainTempMax = main.getString("temp_max");                          // Maximum temperature at the moment. This is deviation from current temp that is possible for large cities and megalopolises geographically expanded (use these parameter optionally). Unit Default: Kelvin, Metric: Celsius, Imperial: Fahrenheit.
+                    String mainHumidity = main.getString("humidity");                         // Humidity, %
+                    String mainPressure = main.getString("pressure");                         // Atmospheric pressure (on the sea level, if there is no sea_level or grnd_level data), hPa
+
+                    JSONObject sys = jsonObj.getJSONObject("sys");
+                    String sunrise = sys.getString("sunrise");                                // Sunrise time, unix, UTC
+                    String sunset = sys.getString("sunset");                                  // Sunset time, unix, UTC
+
+                    JSONObject wind = jsonObj.getJSONObject("wind");
+                    String windSpeed = wind.getString("speed");                               // Wind speed. Unit Default: meter/sec, Metric: meter/sec, Imperial: miles/hour.
+                    String windDeg = wind.getString("deg");                                   // Wind direction, degrees (meteorological)
+                    String windGust = wind.optString("gust");
+
+                    JSONObject clouds = jsonObj.getJSONObject("clouds");
+                    String cloudsAll = clouds.getString("all");                               // Cloudiness, %
+
+                    // tmp hash map for single datum
+                    HashMap<String, String> datum = new HashMap<>();
+
+                    // adding each child node to HashMap key => value
+                    datum.put("name", name);
+                    datum.put("dt", dt);
+                    datum.put("weather.id", weatherId);
+                    datum.put("description", weatherDescription);
+                    datum.put("icon", weatherIcon);
+                    datum.put("temp", mainTemp);
+                    datum.put("temp_min", mainTempMin);
+                    datum.put("temp_max", mainTempMax);
+                    datum.put("humidity", mainHumidity);
+                    datum.put("pressure", mainPressure);
+                    datum.put("speed", windSpeed);
+                    datum.put("deg", windDeg);
+                    datum.put("gust", windGust);
+                    datum.put("clouds", cloudsAll);
+                    datum.put("sunrise", sunrise);
+                    datum.put("sunset", sunset);
+
+                    // adding datum to data list
+                    dataList.add(datum);
+                } catch (final JSONException e) {
+                    Log.e(TAG, "Json parsing error: " + e.getMessage());
+                    runOnUiThread(new Runnable() {
+                        @Override
+                        public void run() {
+                            Toast.makeText(getApplicationContext(),
+                                    "Json parsing error: " + e.getMessage(),
+                                    Toast.LENGTH_LONG)
+                                    .show();
+                        }
+                    });
+                }
+            } else {
+                Log.e(TAG, "Couldn't get json from server.");
+                runOnUiThread(new Runnable() {
+                    @Override
+                    public void run() {
+                        Toast.makeText(getApplicationContext(),
+                                "Couldn't get json from server. Check LogCat for possible errors!",
+                                Toast.LENGTH_LONG)
+                                .show();
+                    }
+                });
+            }
+        }
+
+        String degToCompass(int deg) {
+            int val = (int) ((deg / 22.5) + .5);
+            String[] arr = {"N", "NNE", "NE", "ENE", "E", "ESE", "SE", "SSE", "S", "SSW", "SW", "WSW", "W",
+                    "WNW", "NW", "NNW"};
+            return arr[(val % 16)];
+        }
+
+        float mps2kmph(float speed) {
+            return speed*3.6f;
+        }
+
+        // temp in °C
+        // speed (wind) in m/s
+        float apparentTemperature(float temp, float speed, float humidity) {
+            speed = mps2kmph(speed);
+            float temp_a, temp2, humidity2;
+            // Windchill
+            // http://en.wikipedia.org/wiki/Wind_chill
+            if (temp <= 10 && speed >= 4) {
+                temp_a = 13.12f + 0.6215f * temp - 11.37f * (float) pow(speed, 0.16f) +
+                        0.3965f * temp * (float) pow(speed, 0.16f);
+            }
+            // Heat index
+            // http://de.wikipedia.org/wiki/Hitzeindex
+            else if(temp >= 26.7 && humidity >= 40) {
+                temp2 = (float) pow(temp, 2);
+                humidity2 = (float) pow(humidity, 2);
+                temp_a = -8.784695f + 1.61139411f * temp + 2.338549f * humidity +
+                        -0.14611605f * temp * humidity + -1.2308094e-2f * temp2 +
+                        -1.6424828e-2f * humidity2 + 2.211732e-3f * temp2 * humidity +
+                        7.2546e-4f * temp * humidity2 + -3.582e-6f * temp2 * humidity2;
+            } else{
+                temp_a = temp;
+            }
+            return temp_a;
+        }
+
+
+        /**
+         * Updating parsed JSON data into Views
+         */
+        void updateViews() {
+            int n = dataList.size();
+            if (n > 0) {
+                HashMap<String, String> hm = dataList.get(n - 1);
+                DateTimeFormatter formatter;
+                float tempF = Float.NaN, humidityF = Float.NaN;
+                float speedF = Float.NaN;
+
+                String name = hm.get("name");
+                formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+                String dt = hm.get("dt");
+                if (dt != null) dt = Instant.ofEpochSecond(Long.parseLong(dt)).atZone(ZoneId.systemDefault()).format(formatter);
+                String weatherId = hm.get("weather.id");
+                String description = hm.get("description");
+                String icon = hm.get("icon");
+
+                String temp = hm.get("temp");
+                if (temp != null) tempF = Float.parseFloat(temp);
+                temp = String.format(Locale.getDefault(), "%.1f", tempF);
+                String tempMin = hm.get("temp_min");
+                if (tempMin != null) tempMin = String.format(Locale.getDefault(), "%.1f", Float.parseFloat(tempMin));
+                String tempMax = hm.get("temp_max");
+                if (tempMax != null) tempMax = String.format(Locale.getDefault(), "%.1f", Float.parseFloat(tempMax));
+                String humidity = hm.get("humidity");
+                if (humidity != null) humidityF = Float.parseFloat(humidity);
+                humidity = String.format(Locale.getDefault(), "%.0f", humidityF);
+
+                String pressure = hm.get("pressure");
+                String speed = hm.get("speed");
+                if (speed != null) speedF = Float.parseFloat(speed);
+                speed = String.format(Locale.getDefault(), "%.1f", mps2kmph(speedF));
+                String deg = hm.get("deg");
+                int degI = Integer.MIN_VALUE;
+                if (deg != null) degI = Integer.parseInt(deg);
+                deg = degToCompass(degI);
+                String gust = hm.get("gust");
+                assert gust != null;
+                if (!gust.equals("")) {
+                    float gustF = Float.parseFloat(gust);
+                    gust = String.format(Locale.getDefault(), "%.1f", mps2kmph(gustF));
+                }
+                String clouds = hm.get("clouds");
+                formatter = DateTimeFormatter.ofPattern("HH:mm");
+                String sunrise = hm.get("sunrise");
+                if (sunrise != null) sunrise = Instant.ofEpochSecond(Long.parseLong(sunrise)).atZone(ZoneId.systemDefault()).format(formatter);
+                String sunset = hm.get("sunset");
+                if (sunset != null) sunset = Instant.ofEpochSecond(Long.parseLong(sunset)).atZone(ZoneId.systemDefault()).format(formatter);
+
+                String apparent = String.format(Locale.getDefault(), "%.1f", apparentTemperature(tempF, speedF, humidityF));
+
+                TextView tv = findViewById(v);
+                if (weatherId != null && weatherId.startsWith("5")){  // 5xx rain
+                    if (!gust.equals(""))
+                        tv.setText(Html.fromHtml(String.format(getString(R.string.weather_outdoor_rain_and_gust),
+                                name, dt, description, clouds,
+                                temp, tempMin, tempMax, apparent,
+                                humidity, pressure, speed, deg, gust,
+                                sunrise, sunset), Html.FROM_HTML_MODE_COMPACT));
+                    else
+                        tv.setText(Html.fromHtml(String.format(getString(R.string.weather_outdoor_rain),
+                                name, dt, description, clouds,
+                                temp, tempMin, tempMax, apparent,
+                                humidity, pressure, speed, deg,
+                                sunrise, sunset), Html.FROM_HTML_MODE_COMPACT));
+                } else if (!gust.equals(""))
+                    tv.setText(Html.fromHtml(String.format(getString(R.string.weather_outdoor_gust),
+                            name, dt, description, clouds,
+                            temp, tempMin, tempMax, apparent,
+                            humidity, pressure, speed, deg, gust,
+                            sunrise, sunset), Html.FROM_HTML_MODE_COMPACT));
+                else tv.setText(Html.fromHtml(String.format(getString(R.string.weather_outdoor),
+                            name, dt, description, clouds,
+                            temp, tempMin, tempMax, apparent,
+                            humidity, pressure, speed, deg,
+                            sunrise, sunset), Html.FROM_HTML_MODE_COMPACT));
+
+                // insert image
+                SpannableStringBuilder ssb = new SpannableStringBuilder(tv.getText());
+                Context context = getApplicationContext();
+                int id = context.getResources().getIdentifier("openweathermap_" + icon, "drawable", context.getPackageName());
+                String weather = tv.getText().toString();
+                ssb.setSpan(new CenteredImageSpan(context, id), weather.indexOf("{icon}"), weather.indexOf("{icon}")+6, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
+                tv.setText(ssb, TextView.BufferType.SPANNABLE);
+            }
+        }
+
+        /*
+         * Functions to run endless
+         */
+
+        @Override
+        protected void onProgressUpdate(Void... result) {
+            //super.onProgressUpdate(result);
+            // Treat this like onPostExecute(), do something with result
+            if(endless) {
+                updateViews();
+                runAgain();
+            }
+        }
+
+        @Override
+        protected void onCancelled() {
+            // Make sure we clean up if the task is killed
+            if(endless)
+                terminateTask();
+        }
+
+        void runAgain() {
+            // Call this to request data from the server again
+            lock.lock();
+            try {
+                tryAgain.signal();
+            } finally {
+                lock.unlock();
+            }
+        }
+
+        void terminateTask() {
+            // The task will only finish when we call this method
+            finished = true;
+            //lock.unlock();
+        }
+
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.

app/src/main/java/de/weseng/wifiweatherstation/URLBuilder.java

@@ -0,0 +1,168 @@
+package de.weseng.wifiweatherstation;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.util.*;
+
+/**
+ * Class: URLBuilder
+ *
+ * Utility that helps to build URL String
+ *
+ * Test functions in URLBuilderTest.java
+ *
+ * Source
+ * - User: Gilad Tiram
+ * - Date: 6/12/13
+ * - Time: 4:02 PM
+ */
+class URLBuilder {
+
+    /**
+     * Build URL string from Map of params. Nested Map and Collection is also supported
+     *
+     * @param params   Map of params for constructing the URL Query String
+     * @param encoding encoding type. If not set the "UTF-8" is selected by default
+     * @return String of type key=value&...key=value
+     */
+    static String httpBuildQuery(Map<String, Object> params, String encoding) {
+        if (isEmpty(encoding)) {
+            encoding = "UTF-8";
+        }
+        StringBuilder sb = new StringBuilder();
+        for (Map.Entry<String, Object> entry : params.entrySet()) {
+            if (sb.length() > 0) {
+                sb.append('&');
+            }
+
+            String name = entry.getKey();
+            Object value = entry.getValue();
+
+
+            if (value instanceof Map) {
+                List<String> baseParam = new ArrayList<>();
+                baseParam.add(name);
+                String str = buildUrlFromMap(baseParam, (Map) value, encoding);
+                sb.append(str);
+
+            } else if (value instanceof Collection) {
+                List<String> baseParam = new ArrayList<>();
+                baseParam.add(name);
+                String str = buildUrlFromCollection(baseParam, (Collection) value, encoding);
+                sb.append(str);
+
+            } else {
+                sb.append(encodeParam(name));
+                sb.append("=");
+                sb.append(encodeParam(value));
+            }
+
+
+        }
+        return sb.toString();
+    }
+
+    private static String buildUrlFromMap(List<String> baseParam, Map<Object, Object> map, String encoding) {
+        StringBuilder sb = new StringBuilder();
+        String token;
+
+        //Build string of first level - related with params of provided Map
+        for (Map.Entry<Object, Object> entry : map.entrySet()) {
+
+            if (sb.length() > 0) {
+                sb.append('&');
+            }
+
+            String name = String.valueOf(entry.getKey());
+            Object value = entry.getValue();
+            if (value instanceof Map) {
+                List<String> baseParam2 = new ArrayList<>(baseParam);
+                baseParam2.add(name);
+                String str = buildUrlFromMap(baseParam2, (Map) value, encoding);
+                sb.append(str);
+
+            } else if (value instanceof List) {
+                List<String> baseParam2 = new ArrayList<>(baseParam);
+                baseParam2.add(name);
+                String str = buildUrlFromCollection(baseParam2, (List) value, encoding);
+                sb.append(str);
+            } else {
+                token = getBaseParamString(baseParam) + "[" + name + "]=" + encodeParam(value);
+                sb.append(token);
+            }
+        }
+
+        return sb.toString();
+    }
+
+    private static String buildUrlFromCollection(List<String> baseParam, Collection coll, String encoding) {
+        StringBuilder sb = new StringBuilder();
+        String token;
+        if (!(coll instanceof List)) {
+            coll = new ArrayList(coll);
+        }
+        List arrColl = (List) coll;
+
+        //Build string of first level - related with params of provided Map
+        for (int i = 0; i < arrColl.size(); i++) {
+
+            if (sb.length() > 0) {
+                sb.append('&');
+            }
+
+            Object value = arrColl.get(i);
+            if (value instanceof Map) {
+                List<String> baseParam2 = new ArrayList<>(baseParam);
+                baseParam2.add(String.valueOf(i));
+                String str = buildUrlFromMap(baseParam2, (Map) value, encoding);
+                sb.append(str);
+
+            } else if (value instanceof List) {
+                List<String> baseParam2 = new ArrayList<>(baseParam);
+                baseParam2.add(String.valueOf(i));
+                String str = buildUrlFromCollection(baseParam2, (List) value, encoding);
+                sb.append(str);
+            } else {
+                token = getBaseParamString(baseParam) + "[" + i + "]=" + encodeParam(value);
+                sb.append(token);
+            }
+        }
+
+        return sb.toString();
+    }
+
+
+    private static String getBaseParamString(List<String> baseParam) {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < baseParam.size(); i++) {
+            String s = baseParam.get(i);
+            if (i == 0) {
+                sb.append(s);
+            } else {
+                sb.append("[" + s + "]");
+            }
+        }
+        return sb.toString();
+    }
+
+    /**
+     * Check if String is either empty or null
+     *
+     * @param str string to check
+     * @return true if string is empty. Else return false
+     */
+    private static boolean isEmpty(String str) {
+        return str == null || str.length() == 0;
+    }
+
+
+    private static String encodeParam(Object param) {
+        try {
+            // @throws java.io.UnsupportedEncodingException if encoding is not supported
+            return URLEncoder.encode(String.valueOf(param), "UTF-8");
+        } catch (UnsupportedEncodingException e) {
+            return URLEncoder.encode(String.valueOf(param));
+        }
+    }
+
+}

app/src/main/res/layout/activity_detail.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".DetailActivity">
+
+    <com.github.mikephil.charting.charts.LineChart
+        android:id="@+id/chart1"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginStart="@dimen/widget_horizontal_margin"
+        android:layout_marginTop="@dimen/activity_vertical_margin"
+        android:layout_marginEnd="@dimen/widget_horizontal_margin"
+        android:layout_marginBottom="@dimen/activity_vertical_margin" />
+
+</android.support.constraint.ConstraintLayout>

app/src/main/res/layout/activity_main_native.xml

@@ -10,8 +10,8 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginTop="@dimen/activity_vertical_margin"
-        android:layout_marginStart="@dimen/activity_horizontal_margin"
+        android:layout_marginStart="@dimen/widget_horizontal_margin"
-        android:layout_marginEnd="@dimen/activity_horizontal_margin"
+        android:layout_marginEnd="@dimen/widget_horizontal_margin"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="1.0"
         app:layout_constraintStart_toStartOf="parent"
@@ -21,6 +21,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:layout_marginBottom="-8dp"
+            android:layout_marginStart="@dimen/widget_horizontal_margin"
             android:weightSum="6">
 
             <TextView
@@ -60,7 +61,9 @@
 
             <TableRow
                 android:layout_width="match_parent"
-                android:layout_height="match_parent">
+                android:layout_height="match_parent"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
+                android:layout_marginEnd="@dimen/widget_horizontal_margin">
 
                 <TextView
                     android:id="@+id/textViewTemperatureValue1"
@@ -110,6 +113,8 @@
             <TableRow
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
+                android:layout_marginEnd="@dimen/widget_horizontal_margin"
                 android:weightSum="6">
 
                 <LinearLayout
@@ -189,7 +194,9 @@
 
             <TableRow
                 android:layout_width="match_parent"
-                android:layout_height="match_parent">
+                android:layout_height="match_parent"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
+                android:layout_marginEnd="@dimen/widget_horizontal_margin">
 
                 <TextView
                     android:id="@+id/textViewTemperatureValue2"
@@ -239,6 +246,8 @@
             <TableRow
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
+                android:layout_marginEnd="@dimen/widget_horizontal_margin"
                 android:weightSum="6">
 
                 <LinearLayout
@@ -318,7 +327,9 @@
 
             <TableRow
                 android:layout_width="match_parent"
-                android:layout_height="match_parent">
+                android:layout_height="match_parent"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
+                android:layout_marginEnd="@dimen/widget_horizontal_margin">
 
                 <TextView
                     android:id="@+id/textViewTemperatureValue3"
@@ -368,6 +379,8 @@
             <TableRow
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
+                android:layout_marginEnd="@dimen/widget_horizontal_margin"
                 android:weightSum="6">
 
                 <LinearLayout
@@ -436,6 +449,18 @@
             android:background="?android:attr/listDivider"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent" />
+
+
+        <TextView
+            android:id="@+id/textViewWeatherOutdoor"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/widget_vertical_margin"
+            android:layout_marginBottom="@dimen/widget_vertical_margin"
+            android:layout_marginStart="@dimen/widget_horizontal_margin"
+            android:layout_marginEnd="@dimen/widget_horizontal_margin"
+            android:text="@string/weather_outdoor" />
+
     </TableLayout>
 
     <View

app/src/main/res/values-de/strings.xml

@@ -4,6 +4,41 @@
     <!-- Strings related to native view -->
     <string name="temperature">Temperatur</string>
     <string name="humidity">Feuchtigkeit</string>
+    <string name="weather_outdoor"><![CDATA[<b>Wetterdaten für %s</b> %s
+        <br/>{icon} %s (%s %%)
+        <br/>Temperatur: %s °C — %s° / %s° gefühlt: %s°
+        <br/>Feuchtigkeit: %s %%
+        <br/>Druck: %s hPa
+        <br/>Wind: %s km/h %s
+        <br/>Sonnenaufgang / -untergang: %s / %s]]></string>
+    <string name="weather_outdoor_rain"><![CDATA[<b>Wetterdaten für %s</b> %s
+        <br/>{icon} %s, Bewölkung: %s %%
+        <br/>Temperatur: %s °C — %s° / %s° gefühlt: %s°
+        <br/>Feuchtigkeit: %s %%
+        <br/>Druck: %s hPa
+        <br/>Wind: %s km/h %s
+        <br/>Sonnenaufgang / -untergang: %s / %s]]></string>
+    <string name="weather_outdoor_rain_and_gust"><![CDATA[<b>Wetterdaten für %s</b> %s
+        <br/>{icon} %s, Bewölkung: %s %%
+        <br/>Temperatur: %s °C — %s° / %s° gefühlt: %s°
+        <br/>Feuchtigkeit: %s %%
+        <br/>Druck: %s hPa
+        <br/>Wind: %s km/h %s Windböe %s km/h
+        <br/>Sonnenaufgang / -untergang: %s / %s]]></string>
+    <string name="weather_outdoor_gust"><![CDATA[<b>Wetterdaten für %s</b> %s
+        <br/>{icon} %s (%s %%)
+        <br/>Temperatur: %s °C — %s° / %s° gefühlt: %s°
+        <br/>Feuchtigkeit: %s %%
+        <br/>Druck: %s hPa
+        <br/>Wind: %s km/h %s Windböe %s km/h
+        <br/>Sonnenaufgang / -untergang: %s / %s]]></string>
+    <string name="weather_outdoor_rainfall"><![CDATA[<b>Wetterdaten für %s</b> %s
+        <br/>{icon} %s, Niederschlagsmenge: %s mm, Bewölkung: %s %%
+        <br/>Temperatur: %s °C — %s° / %s° gefühlt: %s°
+        <br/>Feuchtigkeit: %s %%
+        <br/>Druck: %s hPa
+        <br/>Wind: %s km/h %s
+        <br/>Sonnenaufgang / -untergang: %s / %s]]></string>
     <!-- Strings related to settings -->
     <string name="settings">Einstellungen</string>
     <string name="message_connection_internal">Verbindung: intern</string>

app/src/main/res/values/strings.xml

@@ -8,6 +8,45 @@
     <string name="humidity_unit" translatable="false">%</string>
     <string name="dummy_value" translatable="false">__._</string>
     <string name="dummy_value2" translatable="false">o</string>
+    <!-- name, dt;   description, clouds;   temp, tempMin, tempMax, apparent;   humidity;   pressure;   speed, deg;   sunrise, sunset -->
+    <string name="weather_outdoor"><![CDATA[<b>Weather data for %s</b> %s
+        <br/>{icon} %s (%s %%)
+        <br/>Temperature: %s °C — %s° / %s° feels: %s°
+        <br/>Humidity: %s %%
+        <br/>Pressure: %s hPa
+        <br/>Wind: %s km/h %s
+        <br/>Sunrise / sunset: %s / %s]]></string>
+    <!-- print clouds before clouds value if the description is about raining, so no misunderstanding applies -->
+    <!-- name, dt;   description, clouds;   temp, tempMin, tempMax, apparent;   humidity;   pressure;   speed, deg;   sunrise, sunset -->
+    <string name="weather_outdoor_rain"><![CDATA[<b>Weather data for %s</b> %s
+        <br/>{icon} %s, clouds: %s %%
+        <br/>Temperature: %s °C — %s° / %s° feels: %s°
+        <br/>Humidity: %s %%
+        <br/>Pressure: %s hPa
+        <br/>Wind: %s km/h %s
+        <br/>Sunrise / sunset: %s / %s]]></string>
+    <string name="weather_outdoor_rain_and_gust"><![CDATA[<b>Weather data for %s</b> %s
+        <br/>{icon} %s, clouds: %s %%
+        <br/>Temperature: %s °C — %s° / %s° feels: %s°
+        <br/>Humidity: %s %%
+        <br/>Pressure: %s hPa
+        <br/>Wind: %s km/h %s gust: %s km/h
+        <br/>Sunrise / sunset: %s / %s]]></string>
+    <string name="weather_outdoor_gust"><![CDATA[<b>Weather data for %s</b> %s
+        <br/>{icon} %s (%s %%)
+        <br/>Temperature: %s °C — %s° / %s° feels: %s°
+        <br/>Humidity: %s %%
+        <br/>Pressure: %s hPa
+        <br/>Wind: %s km/h %s gust: %s km/h
+        <br/>Sunrise / sunset: %s / %s]]></string>
+    <!-- name, dt;   description, rain, clouds;   temp, tempMin, tempMax, apparent;   humidity;   pressure;   speed, deg;   sunrise, sunset -->
+    <string name="weather_outdoor_rainfall"><![CDATA[<b>Weather data for %s</b> %s
+        <br/>{icon} %s, rainfall: %s mm, clouds: %s %%
+        <br/>Temperature: %s °C — %s° / %s° feels: %s°
+        <br/>Humidity: %s %%
+        <br/>Pressure: %s hPa
+        <br/>Wind: %s km/h %s
+        <br/>Sunrise / sunset: %s / %s]]></string>
     <!-- Strings related to settings -->
     <string name="settings">Settings</string>
     <string name="message" translatable="false">de.weseng.wifiweatherstation.MESSAGE</string>

app/src/test/java/de/weseng/wifiweatherstation/URLBuilderTest.java

@@ -0,0 +1,137 @@
+package de.weseng.wifiweatherstation;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import static de.weseng.wifiweatherstation.URLBuilder.httpBuildQuery;
+import static org.junit.Assert.assertEquals;
+
+public class URLBuilderTest {
+
+    @Test
+    public void basicTest() {
+        Map<String, Object> params = new LinkedHashMap<>();
+        params.put("a", "1");
+        params.put("b", "2");
+        params.put("c", "3");
+
+        assertEquals("a=1&b=2&c=3",
+                httpBuildQuery(params, "UTF-8"));
+    }
+
+    @Test
+    public void testWithMap() {
+        Map<String, Object> params = new LinkedHashMap<>();
+        params.put("a", "1");
+        params.put("b", "2");
+
+        Map<String, Object> cParams = new LinkedHashMap<>();
+        cParams.put("c1", "c1val");
+        cParams.put("c2", "c2val");
+        params.put("c", cParams);
+
+        assertEquals("a=1&b=2&c[c1]=c1val&c[c2]=c2val",
+                httpBuildQuery(params, "UTF-8"));
+    }
+
+    @Test
+    public void testWithNestedMap() {
+        Map<String, Object> params = new LinkedHashMap<>();
+        params.put("a", "1");
+        params.put("b", "2");
+
+        Map<String, Object> cParamsLevel1 = new LinkedHashMap<>();
+        cParamsLevel1.put("cL1-1", "cLevel1-1val");
+        cParamsLevel1.put("cL1-2", "cLevel1-2val");
+
+        Map<String, Object> cParamsLevel2 = new LinkedHashMap<>();
+        cParamsLevel2.put("cL2-1", "cLevel2-1val");
+        cParamsLevel2.put("cL2-2", "cLevel2-2val");
+        cParamsLevel1.put("cL1-3", cParamsLevel2);
+
+        params.put("c", cParamsLevel1);
+
+        assertEquals("a=1&b=2&c[cL1-1]=cLevel1-1val&c[cL1-2]=cLevel1-2val&c[cL1-3][cL2-1]=cLevel2-1val&c[cL1-3][cL2-2]=cLevel2-2val",
+                httpBuildQuery(params, "UTF-8"));
+    }
+
+    @Test
+    public void testWithList() {
+        Map<String, Object> params = new LinkedHashMap<>();
+        params.put("a", "1");
+        params.put("b", "2");
+
+        List<Object> cParams = new ArrayList<>();
+        cParams.add("c1val");
+        cParams.add("c2val");
+        params.put("c", cParams);
+
+        assertEquals("a=1&b=2&c[0]=c1val&c[1]=c2val",
+                httpBuildQuery(params, "UTF-8"));
+    }
+
+    @Test
+    public void testWithNestedList() {
+        Map<String, Object> params = new LinkedHashMap<>();
+        params.put("a", "1");
+        params.put("b", "2");
+
+        List<Object> cParamsLevel1 = new ArrayList<>();
+        cParamsLevel1.add("cL1-val1");
+        cParamsLevel1.add("cL12-val2");
+
+        List<Object> cParamsLevel2 = new ArrayList<>();
+        cParamsLevel2.add("cL2-val1");
+        cParamsLevel2.add("cL2-val2");
+        cParamsLevel1.add(cParamsLevel2);
+
+        params.put("c", cParamsLevel1);
+
+        assertEquals("a=1&b=2&c[0]=cL1-val1&c[1]=cL12-val2&c[2][0]=cL2-val1&c[2][1]=cL2-val2",
+                httpBuildQuery(params, "UTF-8"));
+    }
+
+    @Test
+    public void testCompound() {
+        Map<String, Object> params = new LinkedHashMap<>();
+
+        //flat
+        params.put("a", "1");
+        params.put("b", "2");
+
+        //Map level 1
+        Map<String, Object> cParamsLevel1 = new LinkedHashMap<>();
+        cParamsLevel1.put("cL1-1", "cLevel1-1val");
+        cParamsLevel1.put("cL1-2", "cLevel1-2val");
+
+        //Map level 2
+        Map<String, Object> cParamsLevel2 = new LinkedHashMap<>();
+        cParamsLevel2.put("cL2-1", "cLevel2-1val");
+        cParamsLevel2.put("cL2-2", "cLevel2-2val");
+        cParamsLevel1.put("cL1-3", cParamsLevel2);
+
+        params.put("c", cParamsLevel1);
+
+        //List level 1
+        List<Object> dParamsLevel1 = new ArrayList<>();
+        dParamsLevel1.add("dL1-val1");
+        dParamsLevel1.add("dL12-val2");
+
+        //List level 2
+        List<Object> dParamsLevel2 = new ArrayList<>();
+        dParamsLevel2.add("dL2-val1");
+        dParamsLevel2.add("dL2-val2");
+        dParamsLevel1.add(dParamsLevel2);
+
+        params.put("d", dParamsLevel1);
+
+        assertEquals("a=1&b=2&c[cL1-1]=cLevel1-1val&c[cL1-2]=cLevel1-2val&c[cL1-3][cL2-1]=cLevel2-1val&c[cL1-3][cL2-2]=cLevel2-2val&d[0]=dL1-val1&d[1]=dL12-val2&d[2][0]=dL2-val1&d[2][1]=dL2-val2",
+                httpBuildQuery(params, "UTF-8"));
+
+    }
+
+}