Android MediaPlayer AudioStream AudioFlinger 服务器死机!,致命信号 11
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【中文标题】Android MediaPlayer AudioStream AudioFlinger 服务器死机!,致命信号 11【英文标题】:Android MediaPlayer AudioStream AudioFlinger server died!, Fatal signal 11 【发布时间】:2013-03-09 16:38:45 【问题描述】:我有两个片段(左侧和右侧),并在左侧片段中获取 Radiostreams 列表。通过单击这些流之一,正确的片段应更改流的名称并开始使用给定的 uri 播放流。
2 个问题:
-
一些无线电流不是最新的,所以它们中的很多不再工作了。问题是,这会导致我的应用程序强制关闭!我做了错误处理,但在调用这样的流后我得到:
03-20 14:23:28.192: A/libc(1021): 致命信号 11 (SIGSEGV) 在 0x00000000(代码=1)
03-20 14:23:28.192:W/AudioSystem(1021):AudioFlinger 服务器死机!
03-20 14:23:28.192:W/IMediaDeathNotifier(1021):媒体服务器死了
03-20 14:23:28.192: E/MediaPlayer(1021): 错误 (100, 0)
03-20 14:23:28.192: I/ServiceManager(1021): 等待服务 media.audio_flinger...
03-20 14:23:28.752: I/dalvikvm(1021): threadid=3: 对信号 3 做出反应
03-20 14:23:28.782: I/dalvikvm(1021): 将堆栈跟踪写入 '/data/anr/traces.txt'
03-20 14:23:29.192: I/ServiceManager(1021): 等待服务 media.audio_flinger...
我不知道为什么。还有其他方法可以进行错误处理吗?或者有没有办法在调用 mediaPlayer.setDataSource(uri) 之前检查所有流以避免准备 defekt uris? (最后见我的代码)
-
我正在用遥控器控制左侧的 ListFragment。当我尝试从一个频道快速切换到另一个频道时,一切都非常滞后。似乎 Mediaplayer 的重新实例化需要很长时间。当我不重新实例化时,当我再次调用 mediaPlayer.setDataSource(..) 时会出现运行时错误。有没有办法在一个 MediaPlayer 对象上调用 .setDataSource 两次?
这是我的代码: 我的 MediaPlayer Wrapper 类:
package net.smart4life.tvplay.model;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.AbstractCollection;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnInfoListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.util.Log;
/**
* A wrapper class for @link android.media.MediaPlayer.
* <p>
* Encapsulates an instance of MediaPlayer, and makes a record of its internal
* state accessible via a @link MediaPlayerWrapper#getState() accessor.
*/
public class MediaPlayerStateWrapper
private static String tag = "MediaPlayerWrapper";
private MediaPlayer mPlayer;
private State currentState;
private MediaPlayerStateWrapper mWrapper;
public MediaPlayerStateWrapper()
mWrapper = this;
mPlayer = new MediaPlayer();
currentState = State.IDLE;
mPlayer.setOnPreparedListener(mOnPreparedListener);
mPlayer.setOnCompletionListener(mOnCompletionListener);
mPlayer.setOnBufferingUpdateListener(mOnBufferingUpdateListener);
mPlayer.setOnErrorListener(mOnErrorListener);
mPlayer.setOnInfoListener(mOnInfoListener);
/* METHOD WRAPPING FOR STATE CHANGES */
public static enum State
IDLE, ERROR, INITIALIZED, PREPARING, PREPARED, STARTED, STOPPED, PLAYBACK_COMPLETE, PAUSED;
public void setDataSource(String path)
if (currentState == State.IDLE)
try
mPlayer.setDataSource(path);
currentState = State.INITIALIZED;
catch (IllegalArgumentException e)
e.printStackTrace();
catch (IllegalStateException e)
e.printStackTrace();
catch (IOException e)
e.printStackTrace();
else
throw new RuntimeException();
public void prepareAsync()
Log.d(tag, "prepareAsync()");
if (EnumSet.of(State.INITIALIZED, State.STOPPED).contains(currentState))
mPlayer.prepareAsync();
currentState = State.PREPARING;
else
throw new RuntimeException();
public boolean isPlaying()
Log.d(tag, "isPlaying()");
if (currentState != State.ERROR)
return mPlayer.isPlaying();
else
throw new RuntimeException();
public void seekTo(int msec)
Log.d(tag, "seekTo()");
if (EnumSet.of(State.PREPARED, State.STARTED, State.PAUSED,
State.PLAYBACK_COMPLETE).contains(currentState))
mPlayer.seekTo(msec);
else
throw new RuntimeException();
public void pause()
Log.d(tag, "pause()");
if (EnumSet.of(State.STARTED, State.PAUSED).contains(currentState))
mPlayer.pause();
currentState = State.PAUSED;
else
throw new RuntimeException();
public void start()
Log.d(tag, "start()");
if (EnumSet.of(State.PREPARED, State.STARTED, State.PAUSED,
State.PLAYBACK_COMPLETE).contains(currentState))
mPlayer.start();
currentState = State.STARTED;
else
throw new RuntimeException();
public void stop()
Log.d(tag, "stop()");
if (EnumSet.of(State.PREPARED, State.STARTED, State.STOPPED,
State.PAUSED, State.PLAYBACK_COMPLETE).contains(currentState))
mPlayer.stop();
currentState = State.STOPPED;
else
throw new RuntimeException();
public void reset()
Log.d(tag, "reset()");
mPlayer.reset();
currentState = State.IDLE;
/**
* @return The current state of the mediaplayer state machine.
*/
public State getState()
Log.d(tag, "getState()");
return currentState;
public void release()
Log.d(tag, "release()");
mPlayer.release();
/* INTERNAL LISTENERS */
private OnPreparedListener mOnPreparedListener = new OnPreparedListener()
@Override
public void onPrepared(MediaPlayer mp)
Log.d(tag, "on prepared");
currentState = State.PREPARED;
mWrapper.onPrepared(mp);
mPlayer.start();
currentState = State.STARTED;
;
private OnCompletionListener mOnCompletionListener = new OnCompletionListener()
@Override
public void onCompletion(MediaPlayer mp)
Log.d(tag, "on completion");
currentState = State.PLAYBACK_COMPLETE;
mWrapper.onCompletion(mp);
;
private OnBufferingUpdateListener mOnBufferingUpdateListener = new OnBufferingUpdateListener()
@Override
public void onBufferingUpdate(MediaPlayer mp, int percent)
Log.d(tag, "on buffering update");
mWrapper.onBufferingUpdate(mp, percent);
;
private OnErrorListener mOnErrorListener = new OnErrorListener()
@Override
public boolean onError(MediaPlayer mp, int what, int extra)
Log.d(tag, "on error");
currentState = State.ERROR;
mWrapper.onError(mp, what, extra);
return false;
;
private OnInfoListener mOnInfoListener = new OnInfoListener()
@Override
public boolean onInfo(MediaPlayer mp, int what, int extra)
Log.d(tag, "on info");
mWrapper.onInfo(mp, what, extra);
return false;
;
/* EXTERNAL STUBS TO OVERRIDE */
public void onPrepared(MediaPlayer mp)
public void onCompletion(MediaPlayer mp)
public void onBufferingUpdate(MediaPlayer mp, int percent)
boolean onError(MediaPlayer mp, int what, int extra)
// Error Handling of type: "MEdiaPlayer error(100,0)
mp.stop();
mp.release();
return false;
public boolean onInfo(MediaPlayer mp, int what, int extra)
return false;
/* OTHER STUFF */
public int getCurrentPosition()
if (currentState != State.ERROR)
return mPlayer.getCurrentPosition();
else
return 0;
public int getDuration()
// Prepared, Started, Paused, Stopped, PlaybackCompleted
if (EnumSet.of(State.PREPARED, State.STARTED, State.PAUSED,
State.STOPPED, State.PLAYBACK_COMPLETE).contains(currentState))
return mPlayer.getDuration();
else
return 100;
这是我的 TestFragment(右片段)。注意:左边的 Fragment 是从 TestFragment 调用方法“newChannel(radioChannel)”,每次点击一个列表项。
package net.smart4life.tvplay.fragment;
import java.io.IOException;
import net.smart4life.tvplay.R;
import net.smart4life.tvplay.model.MediaPlayerStateWrapper;
import net.smart4life.tvplay.model.RadioChannel;
import android.app.Fragment;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
public class TestFragment extends Fragment
private RadioChannel radioCh;
private TextView tv_RadioCh;
private MediaPlayerStateWrapper mediaWrapper;
private View view;
// firstcall
public TestFragment(RadioChannel radioChannel)
this.radioCh = radioChannel;
@Override
public void onActivityCreated(Bundle savedInstanceState)
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
setRetainInstance(true);
tv_RadioCh = (TextView) view.findViewById(R.id.radioText);
mediaWrapper = new MediaPlayerStateWrapper();
newChannel(radioCh);
public void newChannel (RadioChannel radioChannel)
this.radioCh = radioChannel;
Log.e("RadioChannel", radioCh.getName());
tv_RadioCh.setText(radioCh.getName());
if(mediaWrapper.isPlaying())
mediaWrapper.stop();
mediaWrapper.reset();
else if(mediaWrapper.getState() == MediaPlayerStateWrapper.State.PREPARING)
mediaWrapper.release();
mediaWrapper = new MediaPlayerStateWrapper();
mediaWrapper.setDataSource(radioCh.getUrl().toString());
mediaWrapper.prepareAsync();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
view = inflater.inflate(R.layout.fragment_radio_player, container,
false);
return view;
@Override
public void onDetach()
super.onDetach();
mediaWrapper.release();
专业人士,您能帮我解决一个或两个问题吗?
【问题讨论】:
我的修复***.com/a/47992111/4592448 【参考方案1】:如果一个流无法加载,你经常卡在准备状态,你可以在这里试试,当mediaWrapper.getState() == MediaPlayerStateWrapper.State.ERROR
:
mediaWrapper.reset();
mediaWrapper.release();
System.gc();
mediaWrapper = new MediaPlayerStateWrapper();
mediaWrapper.setDataSource(radioCh.getUrl().toString());
mediaWrapper.prepareAsync();
最好将其放在AsyncTask
中,以避免不响应错误。或者当你得到一个错误时,你必须创建一个新的 MediaPlayer,因为 Media Server 死了:
if(mediaWrapper.getState() == MediaPlayerStateWrapper.State.ERROR)
mediaWrapper = new MediaPlayerStateWrapper();
mediaWrapper.setDataSource(radioCh.getUrl().toString());
mediaWrapper.prepareAsync();
如果MediaPlayer
正在播放流,您必须先停止并重置它:
mediaWrapper.stop();
mediaWrapper.reset();
mediaWrapper.setDataSource(radioCh.getUrl().toString());
mediaWrapper.prepareAsync();
它对我有用,但我认为这不是最好的方法。当您陷入准备状态时,希望有人能找到更好的解决方案。
【讨论】:
【参考方案2】:关于audioflinger服务错误,正如您所注意到的,它被标记为“what == 100”或error(100,0)。
根据我的卑微经验,您可以采取哪些措施来避免 audioflinger 错误:
-
避免快速调用服务(我确实在创建播放器后添加了大约 500 毫秒的延迟)
限制同时活动的并发 Mediaplayer 的数量。
如何处理audioflinger错误:
-
检测audioflinger错误100,设置它发生的标志并禁用GUI(建议只释放播放器,因为当它已经处于错误状态时停止它是不安全的并且会抛出IllegalStateException &错误(38,0)
启动另一个线程来继续测试服务返回(可以通过创建一个新的媒体播放器,没有例外),超时时间为 5-10 秒
当服务返回时,重置标志并重新启用 GUI
所以参考你的代码:
boolean onError(MediaPlayer mp, int what, int extra)
// Error Handling of type: "MEdiaPlayer error(100,0)
mp.release();
// here you add logic communicating the wrapper or main UI thread
// to disable GUI and set a flag
return false;
然后在包装器中添加一个方法来处理这个问题。
如果您解决此问题并发布解决方案,我将不胜感激。我也面临一个非常相似的问题。
【讨论】:
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