Reorganised code and added support for low-power mode and power-saver modes.

app/app.iml

@@ -65,32 +65,25 @@
       <sourceFolder url="file://$MODULE_DIR$/src/androidTest/jni" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src/androidTest/rs" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/assets" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/bundles" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/classes" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/coverage-instrumented-classes" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dependency-cache" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex-cache" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/support-v4/23.1.1/jars" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/support-v4/22.1.1/jars" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/jacoco" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/javaResources" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/libs" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/lint" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/manifests" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/ndk" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/pre-dexed" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/proguard" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/res" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/resources" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/rs" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/symbols" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/tmp" />
       <excludeFolder url="file://$MODULE_DIR$/build/outputs" />
       <excludeFolder url="file://$MODULE_DIR$/build/tmp" />
     </content>
-    <orderEntry type="jdk" jdkName="Android API 22 Platform" jdkType="Android SDK" />
+    <orderEntry type="jdk" jdkName="Android API 23 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" exported="" name="support-v4-22.1.1" level="project" />
+    <orderEntry type="library" exported="" name="support-v4-23.1.1" level="project" />
-    <orderEntry type="library" exported="" name="support-annotations-22.1.1" level="project" />
+    <orderEntry type="library" exported="" name="support-annotations-23.1.1" level="project" />
     <orderEntry type="module" module-name="colorPicker" exported="" />
   </component>
 </module>

app/build.gradle

@@ -1,15 +1,15 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 22
+    compileSdkVersion 23
-    buildToolsVersion "22.0.0"
+    buildToolsVersion "23.0.1"
 
     defaultConfig {
         applicationId "com.mridang.speedo"
-        minSdkVersion 14
+        minSdkVersion 16
-        targetSdkVersion 22
+        targetSdkVersion 23
-        versionCode 1
+        versionCode 2
-        versionName "1.0"
+        versionName "1.1"
     }
     buildTypes {
         release {
@@ -21,6 +21,6 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:support-v4:22.1.1'
+    compile 'com.android.support:support-v4:23.1.1'
     compile project(':colorPicker')
 }

app/src/main/AndroidManifest.xml

@@ -38,6 +38,21 @@
                 <data android:scheme="package"/>
             </intent-filter>
         </receiver>
+        <receiver
+            android:name=".PowerReceiver"
+            android:enabled="true">
+            <intent-filter>
+                <action android:name="android.os.action.POWER_SAVE_MODE_CHANGED" />
+            </intent-filter>
+        </receiver>
+        <receiver
+            android:name=".BatteryReceiver"
+            android:enabled="true">
+            <intent-filter>
+                <action android:name="android.intent.action.BATTERY_LOW" />
+                <action android:name="android.intent.action.BATTERY_OKAY" />
+            </intent-filter>
+        </receiver>
     </application>
 
 </manifest>

app/src/main/java/com/mridang/speedo/BatteryReceiver.java

@@ -0,0 +1,32 @@
+package com.mridang.speedo;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.preference.PreferenceManager;
+import android.util.Log;
+
+/**
+ * Broadcast receiver class to help start or stop the traffic monitoring service when the phone's
+ * battery level is low or okay.
+ */
+public class BatteryReceiver extends BroadcastReceiver {
+
+    /**
+     * Receiver method for the phone boot that starts the traffic monitoring service
+     */
+    @Override
+    public void onReceive(Context appContext, Intent ittIntent) {
+        Log.v("BatteryReceiver", "Received a battery intent");
+        if (PreferenceManager.getDefaultSharedPreferences(appContext).getBoolean("enabled", true) &&
+                PreferenceManager.getDefaultSharedPreferences(appContext).getBoolean("lowpower", false)) {
+            if (ittIntent.getAction().equals(Intent.ACTION_BATTERY_LOW)) {
+                Log.i("BatteryReceiver", "Battery low. Stopping service");
+                appContext.stopService(new Intent(appContext, TrafficService.class));
+            } else {
+                Log.i("BatteryReceiver", "Battery okay. Starting service");
+                appContext.startService(new Intent(appContext, TrafficService.class));
+            }
+        }
+    }
+}

app/src/main/java/com/mridang/speedo/BootReceiver.java

@@ -6,13 +6,13 @@ import android.content.Intent;
 import android.preference.PreferenceManager;
 
 /**
- Broadcast receiver class to help start the traffic monitoring service when the phone boots up only
+ * Broadcast receiver class to help start the traffic monitoring service when the phone boots up only
- if the service is enabled.
+ * if the service is enabled.
  */
 public class BootReceiver extends BroadcastReceiver {
 
     /**
-	 Receiver method for the phone boot that starts the traffic monitoring service
+     * Receiver method for the phone boot that starts the traffic monitoring service
      */
     @Override
     public void onReceive(Context appContext, Intent bootIntent) {

app/src/main/java/com/mridang/speedo/PowerReceiver.java

@@ -0,0 +1,37 @@
+package com.mridang.speedo;
+
+import android.annotation.TargetApi;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.os.PowerManager;
+import android.preference.PreferenceManager;
+import android.util.Log;
+
+/**
+ * Broadcast receiver class to help start or stop the traffic monitoring service when the phone's
+ * battery saver mode is enabled or disabled
+ */
+public class PowerReceiver extends BroadcastReceiver {
+
+    /**
+     * Receiver method for the phone boot that starts the traffic monitoring service
+     */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @Override
+    public void onReceive(Context appContext, Intent bootIntent) {
+        Log.v("BatteryReceiver", "Received a power intent");
+        if (PreferenceManager.getDefaultSharedPreferences(appContext).getBoolean("enabled", true) &&
+                PreferenceManager.getDefaultSharedPreferences(appContext).getBoolean("lowpower", false)) {
+            PowerManager mgrPower = (PowerManager) appContext.getSystemService(Context.POWER_SERVICE);
+            if (mgrPower.isPowerSaveMode()) {
+                Log.i("BatteryReceiver", "Power saving mode enabled. Stopping service");
+                appContext.stopService(new Intent(appContext, TrafficService.class));
+            } else {
+                Log.i("BatteryReceiver", "Power saving mode disabled. Starting service");
+                appContext.startService(new Intent(appContext, TrafficService.class));
+            }
+        }
+    }
+}

app/src/main/java/com/mridang/speedo/SettingsActivity.java

@@ -9,8 +9,8 @@ import android.preference.Preference;
 import android.preference.PreferenceActivity;
 
 /**
- Settings activity that allows the user to start or stop the service and also change the polling
+ * Settings activity that allows the user to start or stop the service and also change the polling
- interval
+ * interval
  */
 public class SettingsActivity extends PreferenceActivity {
 
@@ -18,7 +18,7 @@ public class SettingsActivity extends PreferenceActivity {
     private TrafficService backgroundService;
 
     /**
-	 Connection class between the activity and the service to be able to invoke service methods
+     * Connection class between the activity and the service to be able to invoke service methods
      */
     private final ServiceConnection mConnection = new ServiceConnection() {
 
@@ -35,7 +35,7 @@ public class SettingsActivity extends PreferenceActivity {
     };
 
     /**
-	 OnStart method of the activity that establishes a connection with the service by binding to it
+     * OnStart method of the activity that establishes a connection with the service by binding to it
      */
     @Override
     protected void onStart() {
@@ -46,8 +46,8 @@ public class SettingsActivity extends PreferenceActivity {
     }
 
     /**
-	 OnStop method of the activity that destroys the connection with the service by unbinding from
+     * OnStop method of the activity that destroys the connection with the service by unbinding from
-	 it
+     * it
      */
     @Override
     protected void onStop() {
@@ -59,8 +59,8 @@ public class SettingsActivity extends PreferenceActivity {
     }
 
     /**
-	 Post create method that bind each of the preferences to a listener so that updating the
+     * Post create method that bind each of the preferences to a listener so that updating the
-	 preferences will fire the listeners to trigger updates to the notification
+     * preferences will fire the listeners to trigger updates to the notification
      */
     @SuppressWarnings("deprecation")
     @Override

app/src/main/java/com/mridang/speedo/TrafficService.java

@@ -17,9 +17,11 @@ import android.net.TrafficStats;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.os.Binder;
+import android.os.Build;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Message;
+import android.os.PowerManager;
 import android.preference.PreferenceManager;
 import android.support.v4.app.NotificationCompat;
 import android.telephony.TelephonyManager;
@@ -27,138 +29,58 @@ import android.text.format.Formatter;
 import android.util.Log;
 
 /**
- Main service class that monitors the network speed and updates the notification every second
+ * Main service class that monitors the network speed and updates the notification every second
  */
 public class TrafficService extends Service {
 
     /**
-	 Custom binder class used for allowing the preference activity to bind to this service so that it
+     * The constant defining the identifier of the notification that is to be shown
-	 may be configured on the fly
-	 */
-	public class LocalBinder extends Binder {
-
-		public TrafficService getServerInstance() {
-			return TrafficService.this;
-		}
-	}
-
-	/**
-	 The instance of the binder class used by the activity
-	 */
-	private final IBinder mBinder = new LocalBinder();
-	/**
-	 The constant defining the identifier of the notification that is to be shown
      */
     private static final int ID = 9000;
     /**
-	 The identifier if the component that open from the settings activity
+     * The identifier if the component that open from the settings activity
      */
     private static final String CMP = "com.android.settings.Settings$DataUsageSummaryActivity";
-
     /**
-	 The handler class that runs every second to update the notification with the network speed. It
+     * The instance of the handler that updates the notification
-	 also runs every minute to save the amount of data-transferred to the preferences.
-	 */
-	private static class NotificationHandler extends Handler {
-
-		/**
-		 The value of the amount of data transferred in the previous invocation of the method
-		 */
-		private long lngPrevious = 0L;
-		/**
-		 The instance of the context of the parent service
-		 */
-		private final Context ctxContext;
-
-		/**
-		 Simple constructor to initialize the initial value of the previous
-		 */
-		@SuppressLint("CommitPrefEdits")
-		public NotificationHandler(Context ctxContext) {
-			this.ctxContext = ctxContext;
-		}
-
-		/**
-		 Handler method that updates the notification icon with the current speed. It is a very
-		 hackish method. We have icons for 1 KB/s to 999 KB/s and 1.0 MB/s to 99.9 MB/s. Every time
-		 the method is invoked, we get the amount of data transferred. By subtracting this value with
-		 the previous value, we get the delta. Since this method is invoked every second, this delta
-		 value indicates the b/s. However, we need to convert this value into KB/s for values under 1
-		 MB/s and we need to convert the value to MB/s for values over 1 MB/s. Since all our icon
-		 images are numbered sequentially we can assume that the R class generated will contain the
-		 integer references of the drawables in the sequential order.
-		 */
-		@Override
-		public void handleMessage(Message msgMessage) {
-
-			TrafficService.hndNotifier.sendEmptyMessageDelayed(1, 1000L);
-
-			long lngCurrent = TrafficStats.getTotalRxBytes() + TrafficStats.getTotalTxBytes();
-			int lngSpeed = (int) (lngCurrent - lngPrevious);
-			lngPrevious = lngCurrent;
-
-			try {
-
-				if (lngSpeed < 1024) {
-					TrafficService.notBuilder.setSmallIcon(R.drawable.wkb000);
-				} else if (lngSpeed < 1048576L) {
-
-					TrafficService.notBuilder.setSmallIcon(R.drawable.wkb000 + (int) (lngSpeed / 1024L));
-					if (lngSpeed > 1022976) {
-						TrafficService.notBuilder.setSmallIcon(R.drawable.wkb000 + 1000);
-					}
-				} else if (lngSpeed <= 10485760) {
-					TrafficService.notBuilder.setSmallIcon(990 + R.drawable.wkb000
-							+ (int) (0.5D + (double) (10F * ((float) lngSpeed / 1048576F))));
-				} else if (lngSpeed <= 103809024) {
-					TrafficService.notBuilder.setSmallIcon(1080 + R.drawable.wkb000
-							+ (int) (0.5D + (double) ((float) lngSpeed / 1048576F)));
-				} else {
-					TrafficService.notBuilder.setSmallIcon(1180 + R.drawable.wkb000);
-				}
-
-				Long lngTotal = TrafficStats.getTotalRxBytes() + TrafficStats.getTotalTxBytes();
-				String strTotal = Formatter.formatFileSize(this.ctxContext, lngTotal);
-				TrafficService.notBuilder.setContentInfo(strTotal);
-				TrafficService.mgrNotifications.notify(ID, TrafficService.notBuilder.build());
-			} catch (Exception e) {
-				Log.e("NotificationHandler", "Error creating notification for speed " + lngSpeed);
-			}
-		}
-	}
-
-	/**
-	 The instance of the handler that updates the notification
      */
     private static NotificationHandler hndNotifier;
     /**
-	 The instance of the manager of the connectivity services
+     * The instance of the manager of the connectivity services
      */
     private static ConnectivityManager mgrConnectivity;
     /**
-	 The instance of the manager of the notification services
+     * The instance of the manager of the notification services
      */
     private static NotificationManager mgrNotifications;
     /**
-	 The instance of the manager of the wireless services
+     * The instance of the manager of the wireless services
      */
     private static WifiManager mgrWireless;
     /**
-	 The instance of the manager of the telephony services
+     * The instance of the manager of the telephony services
      */
     private static TelephonyManager mgrTelephony;
     /**
-	 The instance of the notification builder to rebuild the notification
+     * The instance of the notification builder to rebuild the notification
      */
     private static NotificationCompat.Builder notBuilder;
     /**
-	 The instance of the broadcast receiver to handle intents
+     * The instance of the binder class used by the activity
+     */
+    private final IBinder mBinder = new LocalBinder();
+    /**
+     * The instance of the broadcast receiver to handle intents
      */
     private BroadcastReceiver recScreen;
+    /**
+     * The instance of the broadcast receiver to handle power saver mode intents
+     */
+    private final BroadcastReceiver recSaver = new PowerReceiver();
 
     /**
-	 Initializes the service by getting instances of service managers and mainly setting up the
+     * Initializes the service by getting instances of service managers and mainly setting up the
-	 receiver to receive all the necessary intents that this service is supposed to handle.
+     * receiver to receive all the necessary intents that this service is supposed to handle.
      */
     @Override
     public void onCreate() {
@@ -236,12 +158,18 @@ public class TrafficService extends Service {
         ittScreen.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED);
         ittScreen.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
         registerReceiver(recScreen, ittScreen);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            IntentFilter ittSaver = new IntentFilter();
+            ittScreen.addAction(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED);
+            registerReceiver(recSaver, ittSaver);
+        }
     }
 
     /**
-	 Updates the notification with the new connectivity information. This method determines the type
+     * Updates the notification with the new connectivity information. This method determines the type
-	 of connectivity and updates the notification with the network type and name. If there is no
+     * of connectivity and updates the notification with the network type and name. If there is no
-	 information about the active network, this will suppress the notification.
+     * information about the active network, this will suppress the notification.
      */
     private void connectivityUpdate() {
 
@@ -287,21 +215,22 @@ public class TrafficService extends Service {
     }
 
     /**
-	 Called when the service is being stopped. It doesn't do much except clear the message queue of
+     * Called when the service is being stopped. It doesn't do much except clear the message queue of
-	 the handler, hides the notification and unregisters the receivers.
+     * the handler, hides the notification and unregisters the receivers.
      */
     @Override
     public void onDestroy() {
 
         Log.d("HardwareService", "Stopping the hardware service");
         unregisterReceiver(recScreen);
+        unregisterReceiver(recSaver);
         hndNotifier.removeMessages(1);
         mgrNotifications.cancel(ID);
     }
 
     /**
-	 Helper method that shows the notification by sending the handler a message and building the
+     * Helper method that shows the notification by sending the handler a message and building the
-	 notification. This is invoked when the preference is toggled.
+     * notification. This is invoked when the preference is toggled.
      */
     public void showNotification() {
 
@@ -312,8 +241,8 @@ public class TrafficService extends Service {
     }
 
     /**
-	 Helper method that hides the notification by clearing the handler messages and cancelling the
+     * Helper method that hides the notification by clearing the handler messages and cancelling the
-	 notification. This is invoked when the preference is toggled.
+     * notification. This is invoked when the preference is toggled.
      */
     public void hideNotification() {
 
@@ -323,11 +252,11 @@ public class TrafficService extends Service {
     }
 
     /**
-	 Helper method that toggles the visibility of the notification on the locksreen depending on the
+     * Helper method that toggles the visibility of the notification on the locksreen depending on the
-	 value of the preference in the activity
+     * value of the preference in the activity
-
+     *
-	 @param visibility A boolean value indicating whether the notification should be visible on the
+     * @param visibility A boolean value indicating whether the notification should be visible on the
-	 lockscreen
+     *                   lockscreen
      */
     public void visibilityPublic(Boolean visibility) {
         if (visibility) {
@@ -338,23 +267,106 @@ public class TrafficService extends Service {
     }
 
     /**
-	 Helper method that sets the background color of the notification icon by parsing the RGB value
+     * Helper method that sets the background color of the notification icon by parsing the RGB value
-	 into an int.
+     * into an int.
-
+     *
-	 @param color The internal int representation of the RGB color to set as the background colour
+     * @param color The internal int representation of the RGB color to set as the background colour
      */
     public void setColor(Integer color) {
         notBuilder.setColor(color);
     }
 
     /**
-	 Binder method to allow the settings activity to bind to the service so the notification can be
+     * Binder method to allow the settings activity to bind to the service so the notification can be
-	 configured and updated while the activity is being toggles.
+     * configured and updated while the activity is being toggles.
-
+     *
-	 @see android.app.Service#onBind(android.content.Intent)
+     * @see android.app.Service#onBind(android.content.Intent)
      */
     @Override
     public IBinder onBind(Intent intReason) {
         return mBinder;
     }
+
+    /**
+     * The handler class that runs every second to update the notification with the network speed. It
+     * also runs every minute to save the amount of data-transferred to the preferences.
+     */
+    private static class NotificationHandler extends Handler {
+
+        /**
+         * The instance of the context of the parent service
+         */
+        private final Context ctxContext;
+        /**
+         * The value of the amount of data transferred in the previous invocation of the method
+         */
+        private long lngPrevious = 0L;
+
+        /**
+         * Simple constructor to initialize the initial value of the previous
+         */
+        @SuppressLint("CommitPrefEdits")
+        public NotificationHandler(Context ctxContext) {
+            this.ctxContext = ctxContext;
+        }
+
+        /**
+         * Handler method that updates the notification icon with the current speed. It is a very
+         * hackish method. We have icons for 1 KB/s to 999 KB/s and 1.0 MB/s to 99.9 MB/s. Every time
+         * the method is invoked, we get the amount of data transferred. By subtracting this value with
+         * the previous value, we get the delta. Since this method is invoked every second, this delta
+         * value indicates the b/s. However, we need to convert this value into KB/s for values under 1
+         * MB/s and we need to convert the value to MB/s for values over 1 MB/s. Since all our icon
+         * images are numbered sequentially we can assume that the R class generated will contain the
+         * integer references of the drawables in the sequential order.
+         */
+        @Override
+        public void handleMessage(Message msgMessage) {
+
+            TrafficService.hndNotifier.sendEmptyMessageDelayed(1, 1000L);
+
+            long lngCurrent = TrafficStats.getTotalRxBytes() + TrafficStats.getTotalTxBytes();
+            int lngSpeed = (int) (lngCurrent - lngPrevious);
+            lngPrevious = lngCurrent;
+
+            try {
+
+                if (lngSpeed < 1024) {
+                    TrafficService.notBuilder.setSmallIcon(R.drawable.wkb000);
+                } else if (lngSpeed < 1048576L) {
+
+                    TrafficService.notBuilder.setSmallIcon(R.drawable.wkb000 + (int) (lngSpeed / 1024L));
+                    if (lngSpeed > 1022976) {
+                        TrafficService.notBuilder.setSmallIcon(R.drawable.wkb000 + 1000);
+                    }
+                } else if (lngSpeed <= 10485760) {
+                    TrafficService.notBuilder.setSmallIcon(990 + R.drawable.wkb000
+                            + (int) (0.5D + (double) (10F * ((float) lngSpeed / 1048576F))));
+                } else if (lngSpeed <= 103809024) {
+                    TrafficService.notBuilder.setSmallIcon(1080 + R.drawable.wkb000
+                            + (int) (0.5D + (double) ((float) lngSpeed / 1048576F)));
+                } else {
+                    TrafficService.notBuilder.setSmallIcon(1180 + R.drawable.wkb000);
+                }
+
+                Long lngTotal = TrafficStats.getTotalRxBytes() + TrafficStats.getTotalTxBytes();
+                String strTotal = Formatter.formatFileSize(this.ctxContext, lngTotal);
+                TrafficService.notBuilder.setContentInfo(strTotal);
+                TrafficService.mgrNotifications.notify(ID, TrafficService.notBuilder.build());
+            } catch (Exception e) {
+                Log.e("NotificationHandler", "Error creating notification for speed " + lngSpeed);
+            }
+        }
+    }
+
+    /**
+     * Custom binder class used for allowing the preference activity to bind to this service so that it
+     * may be configured on the fly
+     */
+    public class LocalBinder extends Binder {
+
+        public TrafficService getServerInstance() {
+            return TrafficService.this;
+        }
+    }
 }

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

@@ -4,8 +4,10 @@
     <string name="cellular">Cellular network connectivity</string>
     <string name="enable_disable">Shows or hides the notification icon</string>
     <string name="enable_switch">Enabled</string>
-    <string name="lockscreen_summary">Show the notification in the lockscreen when the phone is locked</string>
+    <string name="lockscreen_summary">Show the notification in the lockscreen when the device is locked</string>
     <string name="lockscreen_title">Publicly visible</string>
+    <string name="lowpower_title">Disable on low battery</string>
+    <string name="lowpower_summary">Disable the notification and the service when the device\'s battery is low or when the power saving mode is enabled</string>
     <string name="color_summary">Background color of the notification icon</string>
     <string name="color_title">Color</string>
 </resources>

app/src/main/res/xml/preferences.xml

@@ -10,6 +10,11 @@
         android:key="lockscreen"
         android:summary="@string/lockscreen_summary"
         android:title="@string/lockscreen_title"/>
+    <SwitchPreference
+        android:defaultValue="false"
+        android:key="lowpower"
+        android:summary="@string/lowpower_summary"
+        android:title="@string/lowpower_title"/>
     <com.mridang.colorpicker.ColorPreference
         android:defaultValue="@android:color/transparent"
         android:key="color"

colorPicker/colorPicker.iml

@@ -68,20 +68,12 @@
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/assets" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/bundles" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/classes" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/coverage-instrumented-classes" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dependency-cache" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dex-cache" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/incremental" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/jacoco" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/javaResources" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/libs" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/lint" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/manifests" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/ndk" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/pre-dexed" />
-      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/proguard" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/res" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/resources" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/rs" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/symbols" />
       <excludeFolder url="file://$MODULE_DIR$/build/outputs" />