CODEWITHSUNDEEP
javaandroidbroadcastreceiverandroid-camerabroadcast
Viktor Apoyan
Viktor Apoyan

Reputation: 10755

BroadcastReceiver don't receive keypress on Camera button

I am trying to play some tone when my application is in background and I press on "Camera" button for that I am doing this simple steps.

  1. Creating BroadcastReceiver class

    public class CameraButtonListener extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        ToneGenerator tone = new ToneGenerator(AudioManager.STREAM_DTMF, 100);
        tone.startTone(0,2000);
        abortBroadcast();
    }
}

  2. Register BrodcastReceiver in onCreate methode.

    @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    MediaButtonBrodcastReceiver receiver = new MediaButtonBrodcastReceiver();        
    IntentFilter filter = new IntentFilter(Intent.ACTION_CAMERA_BUTTON);
    filter.setPriority(25645895);
    registerReceiver(receiver,filter);      
}

  3. Adding brodcast receiver to android manifest.

    <receiver android:enabled="true" android:exported="true" android:name=".CameraButtonListener">
<intent-filter android:priority="25645895">
    <action android:name="android.intent.action.CAMERA_BUTTON" />
    <category android:name="android.intent.category.DEFAULT" />
</intent-filter>

After I launch my application, then press menu button and application goes to the background, after I press on Camera Button and nothing heppens, only camera application is opened. Maybe I am doing something wrong or I have missed something ?

I use Sony Ericsson XPeria Arc phone with Android 2.3.4 OS version.

Upvotes: 0

Views: 1456

Answers (2)

CommonsWare
CommonsWare

Reputation: 1006869

Get rid of the <category> element in your <receiver> element, if you are using step #3. That broadcast probably does not have a category -- you usually only see categories on Intent objects used for startActivity().

Note that your step #2 does not specify a category with its IntentFilter, which is fine.

Upvotes: 1

Joel
Joel

Reputation: 4772

Here, read up on Android Services. Services are used if you want your application to keep performing tasks while in the background. In this case, you want to know when something happens even if your application is not currently in the foreground. This is how to do it.

Upvotes: 0

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