add daily results and tests, make async tasks parallel and endless

move color interpolate functions from async task to main class

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

@@ -1,12 +1,15 @@
 package de.weseng.wifiweatherstation;
 
+import android.annotation.TargetApi;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Color;
 import android.os.AsyncTask;
+import android.os.Build;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -20,11 +23,16 @@ import org.json.JSONObject;
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.ReentrantLock;
 
 import static de.weseng.wifiweatherstation.SettingsActivity.PREFS_NAME;
 
 public class MainNativeActivity extends AppCompatActivity {
-    private int pDialogLockCount = 0;
+    private final String TAG = getClass().getSimpleName();
+    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<>();
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -46,17 +54,84 @@ public class MainNativeActivity extends AppCompatActivity {
                 if (urlGlobal != null && urlGlobal.length() > 0)
                     urlPre = urlGlobal.substring(urlGlobal.length() - 1).equals("/") ? urlGlobal : urlGlobal + "/";
             }
-            //Toast.makeText(getApplicationContext(), urlPre, Toast.LENGTH_LONG).show();
+            executeAsyncTask(new GetData(R.id.textViewTemperatureValue1, R.id.textViewHumidityValue1),
-            new GetData(R.id.textViewTemperatureValue1, R.id.textViewHumidityValue1).execute(
                     urlPre + "api.php?host=192.168.1.71&last");
-            new GetData(R.id.textViewTemperatureValue2, R.id.textViewHumidityValue2).execute(
+            executeAsyncTask(new GetData(R.id.textViewTemperatureValue2, R.id.textViewHumidityValue2),
                     urlPre + "api.php?host=192.168.1.72&last");
-            new GetData(R.id.textViewTemperatureValue3, R.id.textViewHumidityValue3).execute(
+            executeAsyncTask(new GetData(R.id.textViewTemperatureValue3, R.id.textViewHumidityValue3),
                     urlPre + "api.php?host=192.168.1.73&last");
 
+            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));
+            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));
+            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));
+            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");
         }
     }
 
+    @Override
+    public void onPause() {
+        super.onPause();
+        Log.d(TAG, "onPause() called");
+    }
+
+    @Override
+    public void onStop() {
+        super.onStop();
+        Log.d(TAG, "onStop() called");
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        Log.d(TAG, "onDestroy() called");
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        Log.d(TAG, "onStart() called");
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        Log.d(TAG, "onResume() called");
+    }
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        // Check if the key event was the Back button and if there's history
+        if (keyCode == KeyEvent.KEYCODE_BACK) {
+            for(int i=0; i<endlessTasks.size(); i++){
+                endlessTasks.get(i).cancel(false);  // cancel gently
+            }
+            finish();
+            android.os.Process.killProcess(android.os.Process.myPid());
+        }
+        // If it wasn't the Back key, bubble up to the default
+        // system behavior (probably exit the activity)
+        return super.onKeyDown(keyCode, event);
+    }
+
+    @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)
+            asyncTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, params);
+        else
+            asyncTask.execute(params);
+    }
+
     /**
      * Async task class to get json by making HTTP call
      */
@@ -67,28 +142,90 @@ public class MainNativeActivity extends AppCompatActivity {
         ArrayList<HashMap<String, String>> dataList = new ArrayList<>();
 
         int v1, v2;
+        int idMin1, idMax1, idDelta1;
+        int idMin2, idMax2, idDelta2;
+
+        /*
+         * 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;
 
         GetData(int v1, int v2) {
             this.v1 = v1;
             this.v2 = v2;
-            pDialogLockCount += 1;
+            pBarLockCount += 1;
+        }
+
+        GetData(int v1, int v2, int min1, int max1, int delta1, int min2, int max2, int delta2) {
+            this(v1, v2);
+            idMin1 = min1;
+            idMax1 = max1;
+            idDelta1 = delta1;
+            idMin2 = min2;
+            idMax2 = max2;
+            idDelta2 = delta2;
+        }
+
+        /*
+         * Constructor to run endless
+         */
+        GetData(int v1, int v2, int min1, int max1, int delta1, int min2, int max2, int delta2, boolean endless) {
+            this(v1, v2, min1, max1, delta1, min2, max2, delta2);
+            this.endless = endless;
+            pBarLockCount -= 1;  // do not count for endless tasks, pBarSmall is used
         }
 
         @Override
         protected void onPreExecute() {
             super.onPreExecute();
             // Showing progress bar
-//            if (pBar == null) {
-//                pBar= new ProgressBar(MainNativeActivity.this);
-//            }
             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();
+                    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 contacts JSON
             String url = params[0];
 
@@ -140,7 +277,6 @@ public class MainNativeActivity extends AppCompatActivity {
                                     .show();
                         }
                     });
-
                 }
             } else {
                 Log.e(TAG, "Couldn't get json from server.");
@@ -153,103 +289,13 @@ public class MainNativeActivity extends AppCompatActivity {
                                 .show();
                     }
                 });
-
-            }
-
-            return null;
-        }
-
-        int interpolate(int pBegin, int pEnd, int pStep, int pMax) {
-            if (pBegin < pEnd) {
-                return ((pEnd - pBegin) * (pStep / pMax)) + pBegin;
-            } else {
-                return ((pBegin - pEnd) * (1 - (pStep / pMax))) + pEnd;
             }
         }
 
-        int interpolateColor(int theColorBegin, int theColorEnd,
+        /**
-                             int theNumStep, int theNumSteps) {
+         * Updating parsed JSON data into Views
-            int theR0 = (theColorBegin & 0xff0000) >> 16;
+         */
-            int theG0 = (theColorBegin & 0x00ff00) >> 8;
+        void updateViews() {
-            int theB0 = (theColorBegin & 0x0000ff);
-            //int theB0 = (theColorBegin & 0x0000ff) >> 0;
-
-            int theR1 = (theColorEnd & 0xff0000) >> 16;
-            int theG1 = (theColorEnd & 0x00ff00) >> 8;
-            int theB1 = (theColorEnd & 0x0000ff);
-            //int theB1 = (theColorEnd & 0x0000ff) >> 0;
-
-            int theR = interpolate(theR0, theR1, theNumStep, theNumSteps);
-            int theG = interpolate(theG0, theG1, theNumStep, theNumSteps);
-            int theB = interpolate(theB0, theB1, theNumStep, theNumSteps);
-
-            return (((theR << 8) | theG) << 8) | theB;
-        }
-
-        Color valueToColor(float value, float lowMin, float lowMax, float highMin, float highMax,
-                           Color below, Color ideal, Color above) {
-            return Color.valueOf(Color.parseColor(String.format("#%06X",
-                    valueToColorRGB(value, lowMin, lowMax, highMin, highMax, below, ideal, above))));
-        }
-
-        int valueToColorRGB(float value, float lowMin, float lowMax, float highMin, float highMax,
-                            Color below, Color ideal, Color above) {
-            int bel = Integer.parseInt(String.format("%06X", (0xFFFFFF & below.toArgb())), 16);
-            int ide = Integer.parseInt(String.format("%06X", (0xFFFFFF & ideal.toArgb())), 16);
-            int abo = Integer.parseInt(String.format("%06X", (0xFFFFFF & above.toArgb())), 16);
-
-            return valueToColorRGB(value, lowMin, lowMax, highMin, highMax, bel, ide, abo);
-        }
-
-        int valueToColorRGB(float value, float lowMin, float lowMax, float highMin, float highMax,
-                            int below, int ideal, int above) {
-            /*
-             * lowMin < lowMax < highMin < highMax
-             *
-             * Example use for temperatures with color blue for too cold (below), green for ideal
-             * and red for too warm (above) temperatures:
-             * - Below lowMin the color is blue
-             * - Between lowMin and lowMax is color is linear interpolated between blue and green
-             * - Between lowMax and highMin the color is green
-             * - Between highMin and highMax the color is linear interpolated between green and red
-             * - Above highMax the color is red
-             */
-            int result = 0xFFFFFF;  // white
-            int theNumSteps = 100;
-            int theColorBegin, theColorEnd, ratio;
-
-            if (value <= highMin && value >= lowMax)
-                result = ideal;
-            else if (value > highMax)
-                result = above;
-            else if (value > highMin) {
-                theColorBegin = ideal;
-                theColorEnd = above;
-                ratio = (int) ((value - highMin) / (highMax - highMin) * 100);
-                result = interpolateColor(theColorBegin, theColorEnd, ratio, theNumSteps);
-            } else if (value < lowMin)
-                result = below;
-            else if (value < lowMax) {
-                theColorBegin = ideal;
-                theColorEnd = below;
-                ratio = (int) ((lowMax - value) / (lowMax - lowMin) * 100);
-                result = interpolateColor(theColorBegin, theColorEnd, ratio, theNumSteps);
-            }
-            return result;
-        }
-
-        @Override
-        protected void onPostExecute(Void result) {
-            super.onPostExecute(result);
-            pDialogLockCount -= 1;
-            // Dismiss the progress bar
-            if (pBar.getVisibility() == View.VISIBLE && pDialogLockCount == 0) {
-                pBar.setVisibility(View.GONE);
-            }
-            /*
-             * Updating parsed JSON data into Views
-             * */
-
             int n = dataList.size();
             if (n > 0) {
                 HashMap<String, String> hm = dataList.get(n - 1);
@@ -275,9 +321,77 @@ public class MainNativeActivity extends AppCompatActivity {
                 TextView tv2 = findViewById(v2);
                 tv2.setText(humidity);
                 tv2.setTextColor(textColor.toArgb());
+
+                if (idMin1 != 0) {
+                    float min1 = 100, max1 = 0, val1;
+                    float min2 = 100, max2 = 0, val2;
+                    for (int i = 0; i < n; i++) {
+                        hm = dataList.get(i);
+                        val1 = Float.parseFloat(hm.get("temperature"));
+                        if (val1 < min1)
+                            min1 = val1;
+                        if (val1 > max1)
+                            max1 = val1;
+                        val2 = Float.parseFloat(hm.get("humidity"));
+                        if (val2 < min2)
+                            min2 = val2;
+                        if (val2 > max2)
+                            max2 = val2;
+                    }
+                    TextView tv;
+                    tv = findViewById(idMin1);
+                    tv.setText(String.format("%.1f", min1));
+                    tv = findViewById(idMax1);
+                    tv.setText(String.format("%.1f", max1));
+                    tv = findViewById(idDelta1);
+                    tv.setText(String.format("%.1f", max1 - min1));
+                    tv = findViewById(idMin2);
+                    tv.setText(String.format("%.1f", min2));
+                    tv = findViewById(idMax2);
+                    tv.setText(String.format("%.1f", max2));
+                    tv = findViewById(idDelta2);
+                    tv.setText(String.format("%.1f", max2 - min2));
+                }
             }
         }
 
+        /*
+         * 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();
+        }
+
+        public void runAgain() {
+            // Call this to request data from the server again
+            lock.lock();
+            try {
+                tryAgain.signal();
+            } finally {
+                lock.unlock();
+            }
+        }
+
+        public void terminateTask() {
+            // The task will only finish when we call this method
+            finished = true;
+            //lock.unlock();
+        }
+
     }
 
     @Override
@@ -300,11 +414,90 @@ public class MainNativeActivity extends AppCompatActivity {
     }
 
     /**
-     * Called when the user taps the Send button
+     * Called when the user taps the Settings button
      */
     public void settings() {
         Intent intentSettings = new Intent(this, SettingsActivity.class);
         //intentSettings.putExtra(MESSAGE, MESSAGE);
         startActivity(intentSettings);
     }
+
+    int interpolate(int pBegin, int pEnd, int pStep, int pMax) {
+        if (pBegin < pEnd) {
+            return ((pEnd - pBegin) * (pStep / pMax)) + pBegin;
+        } else {
+            return ((pBegin - pEnd) * (1 - (pStep / pMax))) + pEnd;
+        }
+    }
+
+    int interpolateColor(int theColorBegin, int theColorEnd,
+                         int theNumStep, int theNumSteps) {
+        int theR0 = (theColorBegin & 0xff0000) >> 16;
+        int theG0 = (theColorBegin & 0x00ff00) >> 8;
+        int theB0 = (theColorBegin & 0x0000ff);
+        //int theB0 = (theColorBegin & 0x0000ff) >> 0;
+
+        int theR1 = (theColorEnd & 0xff0000) >> 16;
+        int theG1 = (theColorEnd & 0x00ff00) >> 8;
+        int theB1 = (theColorEnd & 0x0000ff);
+        //int theB1 = (theColorEnd & 0x0000ff) >> 0;
+
+        int theR = interpolate(theR0, theR1, theNumStep, theNumSteps);
+        int theG = interpolate(theG0, theG1, theNumStep, theNumSteps);
+        int theB = interpolate(theB0, theB1, theNumStep, theNumSteps);
+
+        return (((theR << 8) | theG) << 8) | theB;
+    }
+
+    Color valueToColor(float value, float lowMin, float lowMax, float highMin, float highMax,
+                       Color below, Color ideal, Color above) {
+        return Color.valueOf(Color.parseColor(String.format("#%06X",
+                valueToColorRGB(value, lowMin, lowMax, highMin, highMax, below, ideal, above))));
+    }
+
+    int valueToColorRGB(float value, float lowMin, float lowMax, float highMin, float highMax,
+                        Color below, Color ideal, Color above) {
+        int bel = Integer.parseInt(String.format("%06X", (0xFFFFFF & below.toArgb())), 16);
+        int ide = Integer.parseInt(String.format("%06X", (0xFFFFFF & ideal.toArgb())), 16);
+        int abo = Integer.parseInt(String.format("%06X", (0xFFFFFF & above.toArgb())), 16);
+
+        return valueToColorRGB(value, lowMin, lowMax, highMin, highMax, bel, ide, abo);
+    }
+
+    /**
+     * lowMin < lowMax < highMin < highMax
+     *
+     * Example use for temperatures with color blue for too cold (below), green for ideal
+     * and red for too warm (above) temperatures:
+     * - Below lowMin the color is blue
+     * - Between lowMin and lowMax is color is linear interpolated between blue and green
+     * - Between lowMax and highMin the color is green
+     * - Between highMin and highMax the color is linear interpolated between green and red
+     * - Above highMax the color is red
+     */
+    int valueToColorRGB(float value, float lowMin, float lowMax, float highMin, float highMax,
+                        int below, int ideal, int above) {
+        int result = 0xFFFFFF;  // white
+        int theNumSteps = 100;
+        int theColorBegin, theColorEnd, ratio;
+
+        if (value <= highMin && value >= lowMax)
+            result = ideal;
+        else if (value > highMax)
+            result = above;
+        else if (value > highMin) {
+            theColorBegin = ideal;
+            theColorEnd = above;
+            ratio = (int) ((value - highMin) / (highMax - highMin) * 100);
+            result = interpolateColor(theColorBegin, theColorEnd, ratio, theNumSteps);
+        } else if (value < lowMin)
+            result = below;
+        else if (value < lowMax) {
+            theColorBegin = ideal;
+            theColorEnd = below;
+            ratio = (int) ((lowMax - value) / (lowMax - lowMin) * 100);
+            result = interpolateColor(theColorBegin, theColorEnd, ratio, theNumSteps);
+        }
+        return result;
+    }
 }

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

@@ -9,11 +9,9 @@
     <TableLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginStart="8dp"
+        android:layout_marginStart="@dimen/activity_horizontal_margin"
-        android:layout_marginLeft="8dp"
+        android:layout_marginTop="@dimen/activity_vertical_margin"
-        android:layout_marginTop="8dp"
+        android:layout_marginEnd="@dimen/activity_horizontal_margin"
-        android:layout_marginEnd="8dp"
-        android:layout_marginRight="8dp"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="1.0"
         app:layout_constraintStart_toStartOf="parent"
@@ -22,14 +20,14 @@
         <TableRow
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:weightSum="4">
+            android:weightSum="6">
 
             <TextView
                 android:id="@+id/textViewTemperature"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:layout_span="3"
                 android:layout_weight="1"
-                android:layout_span="2"
                 android:text="@string/temperature"
                 android:textStyle="bold" />
 
@@ -37,8 +35,8 @@
                 android:id="@+id/textViewHumidity"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:layout_span="3"
                 android:layout_weight="1"
-                android:layout_span="2"
                 android:text="@string/humidity"
                 android:textStyle="bold" />
 
@@ -46,146 +44,359 @@
 
         <TableRow
             android:layout_width="match_parent"
-            android:layout_height="match_parent">
+            android:layout_height="match_parent"
+            android:layout_marginTop="@dimen/widget_vertical_margin">
 
             <TextView
                 android:id="@+id/textViewTemperatureValue1"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:paddingStart="5dp"
-                android:paddingEnd="0dp"
                 android:gravity="end"
                 android:text="@string/dummy_value"
-                android:textSize="36sp"
+                android:textSize="@dimen/value_main_size"
                 android:textStyle="bold" />
 
             <TextView
                 android:id="@+id/textViewTemperatureUnit1"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
-                android:paddingStart="0dp"
+                android:text="@string/temperature_unit"
-                android:paddingEnd="5dp"
-                android:text=" °C"
                 android:textSize="32sp" />
 
+            <Space
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+
             <TextView
                 android:id="@+id/textViewHumidityValue1"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:paddingStart="5dp"
-                android:paddingEnd="0dp"
                 android:gravity="end"
                 android:text="@string/dummy_value"
-                android:textSize="36sp"
+                android:textSize="@dimen/value_main_size"
                 android:textStyle="bold" />
 
             <TextView
                 android:id="@+id/textViewHumidityUnit1"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
-                android:paddingStart="0dp"
+                android:text="@string/humidity_unit"
-                android:paddingEnd="5dp"
-                android:text=" %"
                 android:textSize="32sp" />
+
+            <Space
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
         </TableRow>
 
         <TableRow
             android:layout_width="match_parent"
-            android:layout_height="match_parent">
+            android:layout_height="match_parent"
+            android:weightSum="6">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_span="3"
+                android:layout_weight="1"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textViewTemperatureMin1"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewTemperatureMax1"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewTemperatureDelta1"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/dummy_value2" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_span="3"
+                android:layout_weight="1"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textViewHumidityMin1"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewHumidityMax1"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewHumidityDelta1"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/dummy_value2" />
+
+            </LinearLayout>
+
+        </TableRow>
+
+        <TableRow
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_marginTop="@dimen/widget_vertical_margin">
 
             <TextView
                 android:id="@+id/textViewTemperatureValue2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:paddingStart="5dp"
-                android:paddingEnd="0dp"
                 android:gravity="end"
                 android:text="@string/dummy_value"
-                android:textSize="36sp"
+                android:textSize="@dimen/value_main_size"
                 android:textStyle="bold" />
 
             <TextView
                 android:id="@+id/textViewTemperatureUnit2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
-                android:paddingStart="0dp"
+                android:text="@string/temperature_unit"
-                android:paddingEnd="5dp"
-                android:text=" °C"
                 android:textSize="32sp" />
 
+            <Space
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+
             <TextView
                 android:id="@+id/textViewHumidityValue2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:paddingStart="5dp"
-                android:paddingEnd="0dp"
                 android:gravity="end"
                 android:text="@string/dummy_value"
-                android:textSize="36sp"
+                android:textSize="@dimen/value_main_size"
                 android:textStyle="bold" />
 
             <TextView
                 android:id="@+id/textViewHumidityUnit2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
-                android:paddingStart="0dp"
+                android:text="@string/humidity_unit"
-                android:paddingEnd="5dp"
-                android:text=" %"
                 android:textSize="32sp" />
+
+            <Space
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
         </TableRow>
 
         <TableRow
             android:layout_width="match_parent"
-            android:layout_height="match_parent">
+            android:layout_height="match_parent"
+            android:weightSum="6">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_span="3"
+                android:layout_weight="1"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textViewTemperatureMin2"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewTemperatureMax2"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewTemperatureDelta2"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/dummy_value2" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_span="3"
+                android:layout_weight="1"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textViewHumidityMin2"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewHumidityMax2"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewHumidityDelta2"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/dummy_value2" />
+
+            </LinearLayout>
+
+        </TableRow>
+
+        <TableRow
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_marginTop="@dimen/widget_vertical_margin">
 
             <TextView
                 android:id="@+id/textViewTemperatureValue3"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:paddingStart="5dp"
-                android:paddingEnd="0dp"
                 android:gravity="end"
                 android:text="@string/dummy_value"
-                android:textSize="36sp"
+                android:textSize="@dimen/value_main_size"
                 android:textStyle="bold" />
 
             <TextView
                 android:id="@+id/textViewTemperatureUnit3"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
-                android:paddingStart="0dp"
+                android:text="@string/temperature_unit"
-                android:paddingEnd="5dp"
-                android:text=" °C"
                 android:textSize="32sp" />
 
+            <Space
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+
             <TextView
                 android:id="@+id/textViewHumidityValue3"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:paddingStart="5dp"
-                android:paddingEnd="0dp"
                 android:gravity="end"
                 android:text="@string/dummy_value"
-                android:textSize="36sp"
+                android:textSize="@dimen/value_main_size"
                 android:textStyle="bold" />
 
             <TextView
                 android:id="@+id/textViewHumidityUnit3"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
+                android:layout_marginStart="@dimen/widget_horizontal_margin"
-                android:paddingStart="0dp"
+                android:text="@string/humidity_unit"
-                android:paddingEnd="5dp"
-                android:text=" %"
                 android:textSize="32sp" />
+
+            <Space
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+        </TableRow>
+
+        <TableRow
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:weightSum="6">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_span="3"
+                android:layout_weight="1"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textViewTemperatureMin3"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewTemperatureMax3"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewTemperatureDelta3"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/dummy_value2" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_span="3"
+                android:layout_weight="1"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textViewHumidityMin3"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewHumidityMax3"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginEnd="@dimen/widget_horizontal_margin"
+                    android:text="@string/dummy_value2" />
+
+                <TextView
+                    android:id="@+id/textViewHumidityDelta3"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/dummy_value2" />
+
+            </LinearLayout>
+
         </TableRow>
     </TableLayout>
 
+    <View
+        android:id="@+id/divider"
+        android:layout_width="match_parent"
+        android:layout_height="1dp"
+        android:layout_marginBottom="80dp"
+        android:background="?android:attr/listDivider"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <!-- size 48x48 -->
     <ProgressBar
         android:id="@+id/progressBar"
         style="?android:attr/progressBarStyle"
@@ -193,6 +404,19 @@
         android:layout_height="wrap_content"
         android:layout_marginStart="16dp"
         android:layout_marginBottom="16dp"
+        android:visibility="invisible"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent" />
+
+    <!-- size 16x16 -->
+    <ProgressBar
+        android:id="@+id/progressBarSmall"
+        style="?android:attr/progressBarStyleSmall"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="32dp"
+        android:layout_marginBottom="32dp"
+        android:visibility="invisible"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintStart_toStartOf="parent" />
 </android.support.constraint.ConstraintLayout>

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

@@ -4,4 +4,5 @@
     <dimen name="activity_vertical_margin">16dp</dimen>
     <dimen name="widget_horizontal_margin">8dp</dimen>
     <dimen name="widget_vertical_margin">8dp</dimen>
+    <dimen name="value_main_size">40sp</dimen>
 </resources>

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

@@ -3,8 +3,11 @@
     <string name="loading">Please wait, the view is loading…</string>
     <!-- Strings related to native view -->
     <string name="temperature">Temperature</string>
+    <string name="temperature_unit" translatable="false">°C</string>
     <string name="humidity">Humidity</string>
-    <string name="dummy_value" translatable="false">_._</string>
+    <string name="humidity_unit" translatable="false">%</string>
+    <string name="dummy_value" translatable="false">__._</string>
+    <string name="dummy_value2" translatable="false">o</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/MainNativeActivityTest.java

@@ -0,0 +1,33 @@
+package de.weseng.wifiweatherstation;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class MainNativeActivityTest {
+
+    @Test
+    public void valueToColorRGB_below() {
+        assertEquals(new MainNativeActivity().valueToColorRGB(
+                10, 17, 19, 23, 25,
+                0x719dc3, 0xff00ff00, 0xffd1655d),
+                0x719dc3);
+    }
+
+    @Test
+    public void valueToColorRGB_ideal() {
+        assertEquals(new MainNativeActivity().valueToColorRGB(
+                20, 17, 19, 23, 25,
+                0x719DC3, 0xff00ff00, 0xffd1655d),
+                0xff00ff00);
+    }
+
+    @Test
+    public void valueToColorRGB_above() {
+        assertEquals(new MainNativeActivity().valueToColorRGB(
+                30, 17, 19, 23, 25,
+                0x719DC3, 0xff00ff00, 0xffd1655d),
+                0xffd1655d);
+    }
+
+}