Android Open Source - camp-food-manager Beep Manager

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 * Copyright (C) 2010 ZXing authors// w ww  .  j av a2 s  .  co m
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.zxing.client.android;

import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Vibrator;
import android.util.Log;

import com.V4Creations.FSMK.campfoodmanager.R;
import com.V4Creations.FSMK.campfoodmanager.util.Settings;

/**
 * Manages beeps and vibrations for {@link CaptureActivity}.
 */
public final class BeepManager {

  private static final String TAG = BeepManager.class.getSimpleName();

  private static final float BEEP_VOLUME = 0.10f;
  private static final long VIBRATE_DURATION = 200L;

  private final Activity activity;
  private MediaPlayer mediaPlayer;
  private boolean playBeep;
  private boolean vibrate;

  public BeepManager(Activity activity) {
    this.activity = activity;
    this.mediaPlayer = null;
    updatePrefs();
  }

  public void updatePrefs() {
    playBeep = shouldBeep(activity);
    vibrate = Settings.isVibrationEnabled(activity);
    if (playBeep && mediaPlayer == null) {
      // The volume on STREAM_SYSTEM is not adjustable, and users found it
      // too loud,
      // so we now play on the music stream.
      activity.setVolumeControlStream(AudioManager.STREAM_MUSIC);
      mediaPlayer = buildMediaPlayer(activity);
    }
  }

  public void playBeepSoundAndVibrate() {
    if (playBeep && mediaPlayer != null) {
      mediaPlayer.start();
    }
    if (vibrate) {
      Vibrator vibrator = (Vibrator) activity
          .getSystemService(Context.VIBRATOR_SERVICE);
      vibrator.vibrate(VIBRATE_DURATION);
    }
  }

  private static boolean shouldBeep(Context activity) {
    boolean shouldPlayBeep = Settings.isSoundEnabled(activity);
    if (shouldPlayBeep) {
      // See if sound settings overrides this
      AudioManager audioService = (AudioManager) activity
          .getSystemService(Context.AUDIO_SERVICE);
      if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
        shouldPlayBeep = false;
      }
    }
    return shouldPlayBeep;
  }

  private static MediaPlayer buildMediaPlayer(Context activity) {
    MediaPlayer mediaPlayer = new MediaPlayer();
    mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    // When the beep has finished playing, rewind to queue up another one.
    mediaPlayer
        .setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
          @Override
          public void onCompletion(MediaPlayer player) {
            player.seekTo(0);
          }
        });

    AssetFileDescriptor file = activity.getResources().openRawResourceFd(
        R.raw.beep);
    try {
      mediaPlayer.setDataSource(file.getFileDescriptor(),
          file.getStartOffset(), file.getLength());
      file.close();
      mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
      mediaPlayer.prepare();
    } catch (IOException ioe) {
      Log.w(TAG, ioe);
      mediaPlayer = null;
    }
    return mediaPlayer;
  }

}
Java Source Code List
