package com.zxing.utils;
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import android.app.Activity;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.content.res.AssetFileDescriptor;
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import android.media.AudioManager;
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import android.media.MediaPlayer;
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import android.os.Vibrator;
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import android.preference.PreferenceManager;
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import android.util.Log;
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import com.zxing.R;
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import java.io.Closeable;
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import java.io.IOException;
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/**
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* Manages beeps and vibrations for {}.
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*/
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public class BeepManager implements MediaPlayer.OnCompletionListener, MediaPlayer.OnErrorListener, Closeable {
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private static final String TAG = BeepManager.class.getSimpleName();
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private static final float BEEP_VOLUME = 0.10f;
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private static final long VIBRATE_DURATION = 200L;
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private final Activity activity;
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private MediaPlayer mediaPlayer;
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private boolean playBeep;
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private boolean vibrate;
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public BeepManager(Activity activity) {
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this.activity = activity;
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this.mediaPlayer = null;
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updatePrefs();
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}
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private static boolean shouldBeep(SharedPreferences prefs, Context activity) {
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boolean shouldPlayBeep = true;
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if (shouldPlayBeep) {
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// See if sound settings overrides this
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AudioManager audioService = (AudioManager) activity.getSystemService(Context.AUDIO_SERVICE);
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if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
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shouldPlayBeep = false;
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}
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}
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return shouldPlayBeep;
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}
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private synchronized void updatePrefs() {
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SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
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playBeep = shouldBeep(prefs, activity);
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vibrate = true;
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if (playBeep && mediaPlayer == null) {
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// The volume on STREAM_SYSTEM is not adjustable, and users found it
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// too loud,
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// so we now play on the music stream.
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activity.setVolumeControlStream(AudioManager.STREAM_MUSIC);
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mediaPlayer = buildMediaPlayer(activity);
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}
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}
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public synchronized void playBeepSoundAndVibrate() {
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if (playBeep && mediaPlayer != null) {
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mediaPlayer.start();
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}
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if (vibrate) {
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Vibrator vibrator = (Vibrator) activity.getSystemService(Context.VIBRATOR_SERVICE);
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vibrator.vibrate(VIBRATE_DURATION);
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}
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}
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private MediaPlayer buildMediaPlayer(Context activity) {
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MediaPlayer mediaPlayer = new MediaPlayer();
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mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
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mediaPlayer.setOnCompletionListener(this);
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mediaPlayer.setOnErrorListener(this);
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try {
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AssetFileDescriptor file = activity.getResources().openRawResourceFd(R.raw.beep);
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try {
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mediaPlayer.setDataSource(file.getFileDescriptor(), file.getStartOffset(), file.getLength());
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} finally {
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file.close();
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}
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mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
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mediaPlayer.prepare();
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return mediaPlayer;
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} catch (IOException ioe) {
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Log.w(TAG, ioe);
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mediaPlayer.release();
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return null;
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}
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}
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@Override
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public void onCompletion(MediaPlayer mp) {
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// When the beep has finished playing, rewind to queue up another one.
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mp.seekTo(0);
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}
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@Override
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public synchronized boolean onError(MediaPlayer mp, int what, int extra) {
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if (what == MediaPlayer.MEDIA_ERROR_SERVER_DIED) {
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// we are finished, so put up an appropriate error toast if required
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// and finish
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activity.finish();
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} else {
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// possibly media player error, so release and recreate
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mp.release();
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mediaPlayer = null;
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updatePrefs();
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}
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return true;
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}
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@Override
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public synchronized void close() {
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if (mediaPlayer != null) {
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mediaPlayer.release();
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mediaPlayer = null;
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}
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}
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}
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