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I have a BroadcastReceiver and declared it like this:
<receiver
android:name="com.services.Receiver"
android:enabled="true"
android:exported="true" >
<intent-filter android:priority="999" >
<action android:name="android.intent.action.WALLPAPER_CHANGED" />
</intent-filter>
</receiver>
and the receiver is:
@Override
public void onReceive(final Context context, final Intent intent)
{
change_wallpepar.myPrefs = context.getSharedPreferences("myPrefs", Context.MODE_PRIVATE);
new Handler().postDelayed(new Runnable()
{
@Override
public void run()
{
Log.d("MAYUR", "<< wallpepar changed >>");
if (change_wallpepar.myPrefs.getLong("temp_for_change", 1) == 0)
{
context.stopService(new Intent(context, change_wallpepar.class));
}
else
{
SharedPreferences.Editor e = change_wallpepar.myPrefs.edit();
e.putLong("temp_for_change", 0);
e.commit();
}
}
}, 4000);
}
When I change the wallpaper here it should be called once. It is really working as by my expectations for a while, after some minutes it calls onreceive() multiple (10-18) times, even though the change in wallpaper is done once. Even more strange about this is that it is working fine on a Samsung Galaxy tablet version 4.4.2, but not working on Motorola (Moto E 4.4.4).
My service:
public class change_wallpepar extends Service {
@Override
public void onCreate()
{
// TODO Auto-generated method stub
super.onCreate();
mytimer = new Timer();
wpm = WallpaperManager.getInstance(change_wallpepar.this);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
// TODO Auto-generated method stub
myPrefs = getSharedPreferences("myPrefs", MODE_PRIVATE);
intervall = myPrefs.getLong("someValue", 60000);
path_of_wallpepar.clear();
path_of_wallpepar.add("" + "/storage/emulated/0/Android/data/WallpeparAppHistoryPhotos/514.jpg");
path_of_wallpepar.add("" + "/storage/emulated/0/Android/data/WallpeparAppHistoryPhotos/513.jpg");
DisplayImageOptions defaultOption = new DisplayImageOptions.Builder().cacheInMemory(true).cacheOnDisk(true).bitmapConfig(Bitmap.Config.RGB_565).build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(change_wallpepar.this).defaultDisplayImageOptions(defaultOption).build();
ImageLoader.getInstance().init(config);
mytimer.schedule(new TimerTask()
{
@Override
public void run()
{
try
{
wpm.setBitmap(ImageLoader.getInstance().loadImageSync("file://" + path_of_wallpepar.get(temper)));
}
catch (IOException e)
{
e.printStackTrace();
}
temper++;
if (temper == path_of_wallpepar.size())
temper = 0;
SharedPreferences.Editor e = change_wallpepar.myPrefs.edit();
e.putLong("temp_for_change", 1);
e.commit();
Log.e("MAYUR", "wallpepar seted");
}
}, 0, intervall);
return super.onStartCommand(intent, flags, startId);
}
@Override
public IBinder onBind(Intent intent)
{
// TODO Auto-generated method stub
return null;
}
public void onDestroy()
{
Toast.makeText(this, "Service Destroyed", Toast.LENGTH_SHORT).show();
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(1000);
mytimer.cancel();
super.onDestroy();
}
}
My Logcat output is:
## Logcat ##
04-16 11:06:30.654: E/MAYUR(3405): wallpepar seted
04-16 11:06:34.636: D/MAYUR(3405): << wallpepar changed >>
04-16 11:06:59.584: E/MAYUR(3405): wallpepar seted
04-16 11:07:03.551: D/MAYUR(3405): << wallpepar changed >>
04-16 11:07:30.078: E/MAYUR(3405): wallpepar seted
04-16 11:07:33.979: D/MAYUR(3405): << wallpepar changed >>
04-16 11:07:59.433: E/MAYUR(3405): wallpepar seted
04-16 11:08:03.340: D/MAYUR(3405): << wallpepar changed >>
04-16 11:08:30.029: E/MAYUR(3405): wallpepar seted
04-16 11:08:33.933: D/MAYUR(3405): << wallpepar changed >>
04-16 11:08:59.481: E/MAYUR(3405): wallpepar seted
04-16 11:09:03.383: D/MAYUR(3405): << wallpepar changed >>
04-16 11:09:30.066: E/MAYUR(3405): wallpepar seted
04-16 11:09:33.966: D/MAYUR(3405): << wallpepar changed >>
04-16 11:09:59.448: E/MAYUR(3405): wallpepar seted
04-16 11:10:03.353: D/MAYUR(3405): << wallpepar changed >>
04-16 11:10:30.049: E/MAYUR(3405): wallpepar seted
04-16 11:10:33.955: D/MAYUR(3405): << wallpepar changed >>
04-16 11:10:59.455: E/MAYUR(3405): wallpepar seted
04-16 11:11:03.350: D/MAYUR(3405): << wallpepar changed >>
04-16 11:11:30.182: E/MAYUR(3405): wallpepar seted
04-16 11:11:34.177: D/MAYUR(3405): << wallpepar changed >>
04-16 11:11:59.406: E/MAYUR(3405): wallpepar seted
04-16 11:12:03.315: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:30.025: E/MAYUR(3405): wallpepar seted
04-16 11:12:33.929: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:34.103: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:34.298: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:34.497: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:34.676: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:34.854: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:35.022: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:35.190: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:35.355: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:35.522: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:35.683: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:35.852: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:36.023: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:36.187: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:36.350: D/MAYUR(3405): << wallpepar changed >>
04-16 11:12:36.513: D/MAYUR(3405): << wallpepar changed >>
529
The onReceiver() method is first called on the registered Broadcast Receivers when any event occurs. The intent object is passed with all the additional data. A Context object is also available and is used to start an activity or service using context. startActivity(myIntent); or context.
A broadcast receiver (receiver) is an Android component which allows you to register for system or application events. All registered receivers for an event are notified by the Android runtime once this event happens.
Broadcast in android is the system-wide events that can occur when the device starts, when a message is received on the device or when incoming calls are received, or when a device goes to airplane mode, etc. Broadcast Receivers are used to respond to these system-wide events.
Receive SMS messages with a broadcast receiver. To receive SMS messages, use the onReceive() method of the BroadcastReceiver class. The Android framework sends out system broadcasts of events such as receiving an SMS message, containing intents that are meant to be received using a BroadcastReceiver.
The repeated WALLPAPER_CHANGED calls are caused by smaller Android devices running crop-scale cycles on the image to fit the screen. This is observed in the AOSP code. You're less likely to see this behavior when the screen ratio fits or is bigger than the image, hence why the tablet doesn't exhibit this behavior.
You can fix this problem by double-checking for signs of the unwanted behavior:
long lastExec = System.currentTimeMillis();
@Override
public void onReceive(final Context context, final Intent intent)
{
change_wallpepar.myPrefs = context.getSharedPreferences("myPrefs", Context.MODE_PRIVATE);
new Handler().postDelayed(new Runnable()
{
@Override
public void run()
{
if(System.currentTimeMillis()-lastExec>1000)
{
Log.d("MAYUR", "<< wallpepar changed >>");
if (change_wallpepar.myPrefs.getLong("temp_for_change", 1) == 0)
{
context.stopService(new Intent(context, change_wallpepar.class));
}
else
{
SharedPreferences.Editor e = change_wallpepar.myPrefs.edit();
e.putLong("temp_for_change", 0);
e.commit();
}
}
lastExec = System.currentTimeMillis();
}
}, 4000);
}
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