hello, i want to develop an application who allow the user to change the brightness of the screen when he change the volume (in same time he can choose volume or brightness in all application). In src of class AudioManager i've see this : /** * @hide Broadcast intent when the volume for a particular stream type changes. * Includes the stream and the new volume * * @see #EXTRA_VOLUME_STREAM_TYPE * @see #EXTRA_VOLUME_STREAM_VALUE */ @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String VOLUME_CHANGED_ACTION = "android.media.VOLUME_CHANGED_ACTION"; so i create a Broadcast Receiver to capture this event but nothing. Anybody know how i can do this ? thanks.