我在我的mp3播放器中使用一项服务来播放媒体。我使用mediaplayer对象来播放音乐。通常音量键在播放音乐时起作用。我还在我的服务中使用Telephony Manager来查看电话。当呼叫断开并且正在进行时，我开始和停止音乐。但在断开电话后，音量键停止工作。我可以看到音量变化的对话框。但音量不会改变。任何的想法？它甚至发生在本地玩家身上。
我的播放器服务：
public class PPlayService extends Service {
public static final int NOTIFICATION_NUMBER = 0;
Context conte;
MediaPlayer playHandler;
BroadcastReceiver broadcaster;
IncomingHandler mServiceHandler;
String online = "", link = "", name = "";
boolean playing = false;
boolean currentFlag = true;
Runnable runnable;
String[] uris, names;
int send;
SharedPreferences pre;
NotificationManager notificationManager;
NotificationCompat.Builder mBuilder;
AudioManager am;
// ........
PhoneStateListener phoneStateListener;
TelephonyManager mgr;
boolean notFromTelephone = false;
RemoteViews contentView;
BroadcastReceiver stopFromNoti, forwardFromNoti, backwardFromNoti;
Thread th;
public void handleMessage(Message msg) {
try {
playing = false;
if (playHandler != null) {
playHandler.setOnPreparedListener(null);
playHandler.setOnCompletionListener(null);
}
currentFlag = true;
System.gc();
if (online.equals("0")) {
contentView = new RemoteViews(getPackageName(),
R.layout.offline_notification_layout);
PendingIntent pit = PendingIntent.getBroadcast(conte, 0,
new Intent("stopfromnoti"),
PendingIntent.FLAG_UPDATE_CURRENT);
contentView.setOnClickPendingIntent(R.id.play_or_pause_noti,
pit);
PendingIntent backSong = PendingIntent.getBroadcast(conte, 0,
new Intent("backwardFromNoti"),
PendingIntent.FLAG_UPDATE_CURRENT);
contentView.setOnClickPendingIntent(R.id.backward_noti,
backSong);
PendingIntent frontSong = PendingIntent.getBroadcast(conte, 0,
new Intent("forwardFromNoti"),
PendingIntent.FLAG_UPDATE_CURRENT);
contentView.setOnClickPendingIntent(R.id.forward_noti,
frontSong);
} else {
contentView = new RemoteViews(getPackageName(),
R.layout.online_notification_layout);
PendingIntent pit = PendingIntent.getBroadcast(conte, 0,
new Intent("stopfromnoti"),
PendingIntent.FLAG_UPDATE_CURRENT);
contentView.setOnClickPendingIntent(R.id.play_or_pause_noti,
pit);
}
Intent intt = new Intent(getBaseContext(), MainActivity.class);
PendingIntent pi = PendingIntent.getActivity(getBaseContext(), 0,
intt, 0);
mBuilder = new NotificationCompat.Builder(conte)
.setSmallIcon(R.drawable.icon).setContent(contentView)
.setContentIntent(pi).setAutoCancel(false);
notificationManager.notify(
Mp3Constants.NOTIFICATION_NUMBER_FOR_PLAYER,
mBuilder.build());
Intent in = new Intent(Mp3Constants.NOTIFICATION);
in.putExtra("download", "0");
in.putExtra("online", online);
in.putExtra("name", name);
in.putExtra("status", Mp3Constants.LOADING);
in.putExtra("currentTime", 0);
in.putExtra("totalTime", 0);
conte.sendBroadcast(in);
if (playHandler != null) {
playing = false;
playHandler.reset();
} else {
playHandler = new MediaPlayer();
}
if (online.equals("1")) {
// Online Stream
playHandler.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
playHandler.setDataSource(link);
playHandler.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer arg0) {
if (playHandler != null) {
if (!playHandler.isPlaying()) {
playSongNow();
}
}
}
});
playHandler.prepareAsync();
} catch (Exception e) {
e.printStackTrace();
}
} else {
// Offline Stream
playHandler = MediaPlayer.create(conte, Uri.parse(link));
playSongNow();
}
} catch (Exception e) {
}
}
@Override
public void onCreate() {
conte = this;
am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
am.requestAudioFocus(new OnAudioFocusChangeListener() {
@Override
public void onAudioFocusChange(int focusChange) {
}
}, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT,
AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK);
forwardFromNoti = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent arg1) {
if (playHandler != null) {
playHandler.reset();
playing = false;
}
getSD();
int i = 0;
for (i = 0; i < send; i++) {
if (link.equalsIgnoreCase(uris[i])) {
break;
}
}
if (i >= send - 1) {
if (send > 0) {
name = names[0];
link = uris[0];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
}
} else {
name = names[i + 1];
link = uris[i + 1];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
}
}
};
backwardFromNoti = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent arg1) {
if (playHandler != null) {
playHandler.reset();
playing = false;
}
getSD();
int i = 0;
for (i = 0; i < send; i++) {
if (link.equalsIgnoreCase(uris[i])) {
break;
}
}
if (i == send || i == 0) {
if (send > 0) {
name = names[send - 1];
link = uris[send - 1];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
}
} else {
name = names[i - 1];
link = uris[i - 1];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
}
}
};
stopFromNoti = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent arg1) {
if (playHandler != null) {
playing = false;
Intent in = new Intent(Mp3Constants.NOTIFICATION);
in.putExtra("download", "0");
in.putExtra("online", online);
in.putExtra("status", Mp3Constants.COMPLETED);
in.putExtra("name", name);
in.putExtra("currentTime",
playHandler.getCurrentPosition() / 1000);
in.putExtra("totalTime", playHandler.getDuration() / 1000);
conte.sendBroadcast(in);
playHandler.reset();
stopSelf();
}
stopSelf();
}
};
phoneStateListener = new PhoneStateListener() {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
if (state == TelephonyManager.CALL_STATE_RINGING) {
if (playHandler != null)
if (playHandler.isPlaying()) {
playing = false;
playHandler.pause();
}
} else if (state == TelephonyManager.CALL_STATE_IDLE) {
if (!notFromTelephone) {
notFromTelephone = false;
if (playHandler != null)
if (!playHandler.isPlaying()) {
playSongNow();
}
}
} else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
if (playHandler.isPlaying()) {
playing = false;
playHandler.pause();
}
}
super.onCallStateChanged(state, incomingNumber);
}
};
mgr = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
if (mgr != null) {
mgr.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
}
pre = getSharedPreferences("download", 0);
online = pre.getString("online", "0");
link = pre.getString("link", "");
name = pre.getString("name", "");
contentView = new RemoteViews(getPackageName(),
R.layout.online_notification_layout);
PendingIntent pit = PendingIntent.getBroadcast(conte, 0, new Intent(
"stopfromnoti"), PendingIntent.FLAG_UPDATE_CURRENT);
contentView.setOnClickPendingIntent(R.id.play_or_pause_noti, pit);
notificationManager = (NotificationManager) conte
.getSystemService(Context.NOTIFICATION_SERVICE);
mBuilder = new NotificationCompat.Builder(conte)
.setSmallIcon(R.drawable.icon).setContent(contentView)
.setAutoCancel(false).setContentIntent(pit);
startForeground(Mp3Constants.NOTIFICATION_NUMBER_FOR_PLAYER,
mBuilder.build());
broadcaster = new BroadcastReceiver() {
@Override
public void onReceive(Context arg0, Intent arg1) {
if (arg1.getExtras().getInt("action") == Mp3Constants.PAUSE) {
if (playHandler != null)
if (playHandler.isPlaying()) {
playing = false;
notFromTelephone = true;
playHandler.pause();
}
} else if (arg1.getExtras().getInt("action") == Mp3Constants.PLAY) {
if (playHandler != null)
if (!playHandler.isPlaying()) {
playSongNow();
}
} else if (arg1.getExtras().getInt("action") == Mp3Constants.STOP) {
if (playHandler != null) {
playHandler.reset();
playing = false;
}
stopSelf();
} else if (arg1.getExtras().getInt("action") == Mp3Constants.SEEK) {
if (playHandler != null) {
{
playHandler.seekTo(arg1.getExtras()
.getInt("seekto") * 1000);
}
}
} else if (arg1.getExtras().getInt("action") == Mp3Constants.FORWARD) {
if (playHandler != null) {
playHandler.reset();
playing = false;
}
if (pre.getBoolean("repeat", false)) {
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
} else {
getSD();
if (pre.getBoolean("shuffle", false)) {
Random r = new Random();
int x = r.nextInt(send);
link = uris[x];
name = names[x];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
} else {
for (int i = 0; i < send - 1; i++) {
if (link.equalsIgnoreCase(uris[i])) {
link = uris[i + 1];
name = names[i + 1];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler
.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
break;
}
}
}
}
// getSD();
// int i = 0;
// for (i = 0; i < send; i++) {
// if (link.equalsIgnoreCase(uris[i])) {
// break;
// }
// }
// if (i >= send - 1) {
// if (send > 0) {
// name = names[0];
// link = uris[0];
// pre.edit().putString("name", name);
// pre.edit().putString("online", online);
// pre.edit().putString("link", link);
// Message msg = mServiceHandler.obtainMessage();
// msg.arg1 = 1;
// mServiceHandler.sendMessage(msg);
// }
// } else {
// name = names[i + 1];
// link = uris[i + 1];
// pre.edit().putString("name", name);
// pre.edit().putString("online", online);
// pre.edit().putString("link", link);
// Message msg = mServiceHandler.obtainMessage();
// msg.arg1 = 1;
// mServiceHandler.sendMessage(msg);
// }
} else if (arg1.getExtras().getInt("action") == Mp3Constants.BACKWARD) {
if (playHandler != null) {
playHandler.reset();
playing = false;
}
if (pre.getBoolean("repeat", false)) {
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
} else {
getSD();
if (pre.getBoolean("shuffle", false)) {
Random r = new Random();
int x = r.nextInt(send);
link = uris[x];
name = names[x];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
} else {
int i = 0;
for (i = 0; i < send; i++) {
if (link.equalsIgnoreCase(uris[i])) {
break;
}
}
if (i == send || i == 0) {
if (send > 0) {
name = names[send - 1];
link = uris[send - 1];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler
.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
}
} else {
name = names[i - 1];
link = uris[i - 1];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
}
// for (int i = 0; i < send - 1; i++) {
// if (link.equalsIgnoreCase(uris[i])) {
// link = uris[i - 1];
// name = names[i - 1];
// pre.edit().putString("name", name);
// pre.edit().putString("online", online);
// pre.edit().putString("link", link);
// Message msg = mServiceHandler
// .obtainMessage();
// msg.arg1 = 1;
// mServiceHandler.sendMessage(msg);
// break;
// }
// }
}
}
// getSD();
// int i = 0;
// for (i = 0; i < send; i++) {
// if (link.equalsIgnoreCase(uris[i])) {
// break;
// }
// }
// if (i == send || i == 0) {
// if (send > 0) {
// name = names[send - 1];
// link = uris[send - 1];
// pre.edit().putString("name", name);
// pre.edit().putString("online", online);
// pre.edit().putString("link", link);
// Message msg = mServiceHandler.obtainMessage();
// msg.arg1 = 1;
// mServiceHandler.sendMessage(msg);
// }
// } else {
// name = names[i - 1];
// link = uris[i - 1];
// pre.edit().putString("name", name);
// pre.edit().putString("online", online);
// pre.edit().putString("link", link);
// Message msg = mServiceHandler.obtainMessage();
// msg.arg1 = 1;
// mServiceHandler.sendMessage(msg);
// }
}
}
};
registerReceiver(broadcaster, new IntentFilter(
"com.codebrew.bestmp3downloader.PPlayService"));
registerReceiver(stopFromNoti, new IntentFilter("stopfromnoti"));
registerReceiver(forwardFromNoti, new IntentFilter("forwardFromNoti"));
registerReceiver(backwardFromNoti, new IntentFilter("backwardFromNoti"));
HandlerThread thread = new HandlerThread("ServiceStartArguments", 0);
// //..................
// notificationManager = (NotificationManager) conte
// .getSystemService(Context.NOTIFICATION_SERVICE);
// mBuilder = new NotificationCompat.Builder(conte);
// RemoteViews remoteViews = new RemoteViews(getPackageName(),
// R.layout.notification_layout);
// try {
// mBuilder.setSmallIcon(R.drawable.icon);
// mBuilder.setAutoCancel(false).setOngoing(true)
// .setContent(remoteViews);
// Uri uri = RingtoneManager
// .getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
// mBuilder.setSound(uri);
// notificationManager.notify(Mp3Constants.NOTIFICATION_NUMBER,
// mBuilder.build());
// } catch (Exception e) {
// e.printStackTrace();
// }
// //...................
thread.start();
mServiceHandler = new IncomingHandler(PPlayService.this);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// online = intent.getExtras().getString("online");
// link = intent.getExtras().getString("link");
// name = intent.getExtras().getString("name");
online = pre.getString("online", "0");
link = pre.getString("link", "");
name = pre.getString("name", "");
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = startId;
mServiceHandler.sendMessage(msg);
return START_NOT_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
unregisterReceiver(broadcaster);
unregisterReceiver(stopFromNoti);
unregisterReceiver(forwardFromNoti);
unregisterReceiver(backwardFromNoti);
if (playHandler != null) {
if (playHandler.isPlaying()) {
playHandler.stop();
}
playHandler = null;
}
if (mgr != null) {
mgr.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE);
}
super.onDestroy();
notificationManager.cancel(Mp3Constants.NOTIFICATION_NUMBER_FOR_PLAYER);
}
public void playSongNow() {
try {
playing = true;
playHandler.start();
runnable = new Runnable() {
public void run() {
while (playing) {
if (playing) {
try {
Intent in = new Intent(
Mp3Constants.NOTIFICATION);
in.putExtra("download", "0");
in.putExtra("online", online);
in.putExtra("name", name);
in.putExtra("status", Mp3Constants.PLAYING);
if (playHandler.getCurrentPosition() / 1000 == playHandler
.getDuration() / 1000)
th.stop();
in.putExtra("currentTime",
playHandler.getCurrentPosition() / 1000);
in.putExtra("totalTime",
playHandler.getDuration() / 1000);
if (currentFlag) {
currentFlag = false;
contentView.setTextViewText(
R.id.name_of_the_song, name);
notificationManager
.notify(Mp3Constants.NOTIFICATION_NUMBER_FOR_PLAYER,
mBuilder.setContent(
contentView)
.build());
}
conte.sendBroadcast(in);
Thread.sleep(1000);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
};
th = new Thread(runnable);
th.start();
playHandler.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
playing = false;
pre.edit().putBoolean("stopped", true).commit();
Intent in = new Intent(Mp3Constants.NOTIFICATION);
in.putExtra("download", "0");
in.putExtra("online", online);
in.putExtra("status", Mp3Constants.COMPLETED);
in.putExtra("name", name);
try {
in.putExtra("currentTime",
playHandler.getCurrentPosition() / 1000);
in.putExtra("totalTime",
playHandler.getDuration() / 1000);
} catch (Exception e) {
in.putExtra("currentTime", 0);
in.putExtra("totalTime", 0);
}
conte.sendBroadcast(in);
if (online.equals("0")) {
if (pre.getBoolean("repeat", false)) {
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
} else {
getSD();
if (pre.getBoolean("shuffle", false)) {
Random r = new Random();
int x = r.nextInt(send);
link = uris[x];
name = names[x];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
} else {
for (int i = 0; i < send - 1; i++) {
if (link.equalsIgnoreCase(uris[i])) {
link = uris[i + 1];
name = names[i + 1];
pre.edit().putString("name", name);
pre.edit().putString("online", online);
pre.edit().putString("link", link);
Message msg = mServiceHandler
.obtainMessage();
msg.arg1 = 1;
mServiceHandler.sendMessage(msg);
break;
}
}
}
}
}
if (online.equals("1")) {
// stopSelf();
}
}
});
} catch (Exception e) {
playing = false;
Intent in = new Intent(Mp3Constants.NOTIFICATION);
in.putExtra("download", "0");
in.putExtra("online", online);
in.putExtra("name", name);
in.putExtra("status", Mp3Constants.FAILED);
in.putExtra("currentTime", 0);
in.putExtra("totalTime", 0);
conte.sendBroadcast(in);
Toast.makeText(
getBaseContext(),
"Error playing: "
+ name
+ "\nFile broken or deleted! Please try another song",
Toast.LENGTH_SHORT).show();
stopSelf();
}
}
private void getSD() {
File f = new File(Environment.getExternalStorageDirectory().toString()
+ "/Music");
File[] files = f.listFiles();
if (files == null) {
return;
}
Arrays.sort(files, new Comparator<Object>() {
public int compare(Object o1, Object o2) {
if (((File) o1).lastModified() > ((File) o2).lastModified()) {
return +1;
} else if (((File) o1).lastModified() < ((File) o2)
.lastModified()) {
return -1;
} else {
return 0;
}
}
});
send = files.length;
uris = new String[send];
names = new String[send];
for (int i = 0; i < send; i++) {
File file = files[i];
// take the file name only
double size = file.length();
size = size / (1024 * 1024);
String myfile = file
.getPath()
.substring(file.getPath().lastIndexOf("/") + 1,
file.getPath().length()).toLowerCase();
uris[send - 1 - i] = file.getPath();
names[send - 1 - i] = myfile;
}
}
static class IncomingHandler extends Handler {
private final WeakReference<PPlayService> mService;
IncomingHandler(PPlayService service) {
mService = new WeakReference<PPlayService>(service);
}
@Override
public void handleMessage(Message msg) {
PPlayService service = mService.get();
if (service != null) {
service.handleMessage(msg);
}
}
}
}