Android Open Source - FPlayAndroid External Receiver

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The source code is released under:

Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the followin...

Java Source Code

//
// FPlayAndroid is distributed under the FreeBSD License
////from w  w w . j  a  va  2s .  co  m
// Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.
//
// https://github.com/carlosrafaelgn/FPlayAndroid
//
package br.com.carlosrafaelgn.fplay;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Message;
import android.view.KeyEvent;

import br.com.carlosrafaelgn.fplay.activity.MainHandler;
import br.com.carlosrafaelgn.fplay.playback.Player;

//
//Allowing applications to play nice(r) with each other: Handling remote control buttons
//http://android-developers.blogspot.com.br/2010/06/allowing-applications-to-play-nicer.html
//
public final class ExternalReceiver extends BroadcastReceiver implements MainHandler.Callback {
  private static final int BECOMING_NOISY = 1;
  private static final int AUDIO_SINK_CHANGED = 2;
  private static final int MEDIA_KEY = 3;
  
  private void handleEvent(int event, int extra) {
    if (!MainHandler.isOnMainThread()) {
      MainHandler.sendMessage(this, event, extra, 0);
      return;
    }
    switch (event) {
    case BECOMING_NOISY:
      Player.becomingNoisy();
      break;
    case AUDIO_SINK_CHANGED:
      if (Player.isFocused())
        Player.registerMediaButtonEventReceiver();
      Player.audioSinkChanged(extra != 0);
      break;
    case MEDIA_KEY:
      Player.handleMediaButton(extra);
      break;
    }
  }
  
  @Override
  public void onReceive(Context context, Intent intent) {
    if (intent == null || Player.getState() != Player.STATE_INITIALIZED)
      return;
    final String a = intent.getAction();
    if (a == null)
      return;
    if (a.equals("android.media.AUDIO_BECOMING_NOISY")) {
      handleEvent(BECOMING_NOISY, 0);
    } else if (a.equals("android.intent.action.HEADSET_PLUG")) {
      handleEvent(AUDIO_SINK_CHANGED, (intent.getExtras().getInt("state", -1) > 0) ? 1 : 0);
    } else if (a.equals("android.intent.action.MEDIA_BUTTON")) {
      final Object o = intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
      if (o == null || !(o instanceof KeyEvent))
        return;
      final KeyEvent e = (KeyEvent)o;
      if (e.getAction() == KeyEvent.ACTION_DOWN)
        handleEvent(MEDIA_KEY, e.getKeyCode());
    } else if (a.equals("android.intent.action.CALL_BUTTON")) {
      if (Player.isFocused())
        handleEvent(MEDIA_KEY, KeyEvent.KEYCODE_CALL);
    } else if (a.equals("android.media.ACTION_SCO_AUDIO_STATE_UPDATED") ||
        a.equals("android.media.SCO_AUDIO_STATE_CHANGED") ||
        a.equals("android.bluetooth.headset.profile.action.CONNECTION_STATE_CHANGED") ||
        a.equals("android.bluetooth.a2dp.profile.action.CONNECTION_STATE_CHANGED") ||
        a.equals("android.bluetooth.intent.action.HEADSET_STATE_CHANGED")) {
      handleEvent(AUDIO_SINK_CHANGED, 0);
    }
    if (isOrderedBroadcast())
      abortBroadcast();
  }

  @Override
  public boolean handleMessage(Message msg) {
    handleEvent(msg.what, msg.arg1);
    return true;
  }
}

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