Android Open Source - SpartanTimeLapseRecorder Mute Shutter

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License

The source code is released under:

GNU General Public License

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Java Source Code

/*
 * Spartan Time Lapse Recorder - Minimalistic android time lapse recording app
 * Copyright (C) 2014  Andreas Rohner/* w  w  w  .  j av  a  2  s  .  c om*/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package at.andreasrohner.spartantimelapserec.sensor;

import android.content.Context;
import android.media.AudioManager;
import android.os.Handler;

public class MuteShutter {
  private int mode;
  private int ringerMode;
  private static final int[] streams = new int[] { AudioManager.STREAM_DTMF,
      AudioManager.STREAM_MUSIC, AudioManager.STREAM_NOTIFICATION,
      AudioManager.STREAM_SYSTEM };
  private int[] streamVolumes = new int[streams.length];
  private AudioManager manager;
  private final Handler handler = new Handler();
  private volatile boolean muted;

  public MuteShutter(Context context) {
    this.manager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
    muted = false;
  }

  private void storeSoundSettings() {
    mode = manager.getMode();
    ringerMode = manager.getRingerMode();

    for (int i = 0; i < streams.length; ++i)
      streamVolumes[i] = manager.getStreamVolume(streams[i]);
  }

  private void recoverSoundSettings() {
    manager.setMode(mode);
    manager.setRingerMode(ringerMode);

    for (int i = 0; i < streams.length; ++i)
      manager.setStreamVolume(streams[i], streamVolumes[i],
          AudioManager.FLAG_ALLOW_RINGER_MODES);
  }

  public void maxAllStreams() {
    for (int stream : streams) {
      manager.setStreamMute(stream, false);
      manager.setStreamVolume(stream, manager.getStreamMaxVolume(stream),
          AudioManager.FLAG_ALLOW_RINGER_MODES);
    }
  }

  public synchronized void unmuteShutter() {
    if (!muted)
      return;

    maxAllStreams();

    recoverSoundSettings();
    muted = false;
  }

  private void restartHandler() {
    // remove all Runnables
    handler.removeCallbacksAndMessages(null);
    handler.postDelayed(new Runnable() {
      public void run() {
        unmuteShutter();
      }
    }, 2000);
  }

  public synchronized void muteShutter() {
    if (muted) {
      restartHandler();
      return;
    }

    storeSoundSettings();

    for (int stream : streams) {
      manager.setStreamVolume(stream, 0,
          AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
      manager.setStreamMute(stream, true);
    }

    manager.setRingerMode(AudioManager.RINGER_MODE_SILENT);
    muted = true;

    restartHandler();
  }
}

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