我写了一个mp3播放器 然后播放的时候音乐会有一些噪声而且播放一会就自动停了 。日志里面的打印的是 mediaPlayer error
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ImageButton playButton=null;
ImageButton pauseButton=null;
ImageButton stopButton=null;
Mp3Info mp3Info=null;
MediaPlayer mediaPlayer=null;
private boolean isplay=false;
private boolean ispause=false;
private boolean isstop=false;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.play);
Intent intent=getIntent();
mp3Info=(Mp3Info)intent.getSerializableExtra("mp3Info");
playButton=(ImageButton)findViewById(R.id.play);
pauseButton=(ImageButton)findViewById(R.id.pause);
stopButton=(ImageButton)findViewById(R.id.stop);
playButton.setOnClickListener(new playButtononclick());
pauseButton.setOnClickListener(new pauseButtononclick());
stopButton.setOnClickListener(new stopButtononclick());
}
class playButtononclick implements OnClickListener{ @Override
public void onClick(View v) {
if(!isplay){
mediaPlayer=MediaPlayer.create(PlayerActivity.this, Uri.parse(getPath(mp3Info)));
mediaPlayer.setLooping(false);
/* try {
mediaPlayer.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
*/ }
mediaPlayer.start();
isplay=true;
isstop=false;
}
} private String getPath(Mp3Info mp3Info) {
String SDCardRoot =Environment.getExternalStorageDirectory().getAbsolutePath();
String path=SDCardRoot+File.separator+"mp3"+File.separator+mp3Info.getMp3Name();
return path;
}
class pauseButtononclick implements OnClickListener{ @Override
public void onClick(View v) {
if(mediaPlayer!=null){
if(!isstop){
if(!ispause){
mediaPlayer.pause();
ispause=true;
isplay=true;
}else {
mediaPlayer.start();
ispause=false;
}
}
}
}
}
class stopButtononclick implements OnClickListener{ @Override
public void onClick(View v) {
if(mediaPlayer!=null){
if(isplay){
if(!isstop){
mediaPlayer.stop();
mediaPlayer.release();
isstop=true;
}
}
}
}
}
}
)
12-27 07:25:27.409: W/System.err(311): at android.widget.TabHost.addTab(TabHost.java:213)
12-27 07:25:27.409: W/System.err(311): at mars.mp3player.MainActivity.onCreate(MainActivity.java:24)
12-27 07:25:27.409: W/System.err(311): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-27 07:25:27.409: W/System.err(311): at android.os.Handler.dispatchMessage(Handler.java:99)
12-27 07:25:27.409: W/System.err(311): at android.os.Looper.loop(Looper.java:123)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-27 07:25:27.409: W/System.err(311): at java.lang.reflect.Method.invokeNative(Native Method)
12-27 07:25:27.419: W/System.err(311): at java.lang.reflect.Method.invoke(Method.java:521)
12-27 07:25:27.419: W/System.err(311): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-27 07:25:27.419: W/System.err(311): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-27 07:25:27.419: W/System.err(311): at dalvik.system.NativeStart.main(Native Method)
12-27 07:25:44.018: D/dalvikvm(311): Debugger has detached; object registry had 1 entries
12-27 07:27:02.779: W/System.err(354): org.apache.harmony.xml.ExpatParser$ParseException: At line 1, column 566: no element found
12-27 07:27:02.788: W/System.err(354): at org.apache.harmony.xml.ExpatParser.finish(ExpatParser.java:553)
12-27 07:27:02.788: W/System.err(354): at org.apache.harmony.xml.ExpatParser.parseDocument(ExpatParser.java:493)
12-27 07:27:02.788: W/System.err(354): at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:308)
12-27 07:27:02.788: W/System.err(354): at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:264)
12-27 07:27:02.788: W/System.err(354): at mars.mp3player.Mp3ListActivity.parse(Mp3ListActivity.java:105)
12-27 07:27:02.788: W/System.err(354): at mars.mp3player.Mp3ListActivity.updateListView(Mp3ListActivity.java:85)
12-27 07:27:02.788: W/System.err(354): at mars.mp3player.Mp3ListActivity.onCreate(Mp3ListActivity.java:50)
12-27 07:27:02.788: W/System.err(354): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-27 07:27:02.798: W/System.err(354): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-27 07:27:02.798: W/System.err(354): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)
12-27 07:27:02.798: W/System.err(354): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
12-27 07:27:02.798: W/System.err(354): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
12-27 07:27:02.798: W/System.err(354): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651)
12-27 07:27:02.798: W/System.err(354): at android.widget.TabHost.setCurrentTab(TabHost.java:323)
12-27 07:27:02.798: W/System.err(354): at android.widget.TabHost.addTab(TabHost.java:213)
12-27 07:27:02.798: W/System.err(354): at mars.mp3player.MainActivity.onCreate(MainActivity.java:24)
12-27 07:27:02.798: W/System.err(354): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-27 07:27:02.809: W/System.err(354): at android.os.Handler.dispatchMessage(Handler.java:99)
12-27 07:27:02.809: W/System.err(354): at android.os.Looper.loop(Looper.java:123)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-27 07:27:02.809: W/System.err(354): at java.lang.reflect.Method.invokeNative(Native Method)
12-27 07:27:02.809: W/System.err(354): at java.lang.reflect.Method.invoke(Method.java:521)
12-27 07:27:02.820: W/System.err(354): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-27 07:27:02.820: W/System.err(354): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-27 07:27:02.820: W/System.err(354): at dalvik.system.NativeStart.main(Native Method)
12-27 07:30:56.855: E/MediaPlayer(354): error (1, -2147483648)
12-27 07:30:56.855: E/MediaPlayer(354): Error (1,-2147483648)
12-27 07:25:27.409: W/System.err(311): at android.widget.TabHost.addTab(TabHost.java:213)
12-27 07:25:27.409: W/System.err(311): at mars.mp3player.MainActivity.onCreate(MainActivity.java:24)
12-27 07:25:27.409: W/System.err(311): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-27 07:25:27.409: W/System.err(311): at android.os.Handler.dispatchMessage(Handler.java:99)
12-27 07:25:27.409: W/System.err(311): at android.os.Looper.loop(Looper.java:123)
12-27 07:25:27.409: W/System.err(311): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-27 07:25:27.409: W/System.err(311): at java.lang.reflect.Method.invokeNative(Native Method)
12-27 07:25:27.419: W/System.err(311): at java.lang.reflect.Method.invoke(Method.java:521)
12-27 07:25:27.419: W/System.err(311): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-27 07:25:27.419: W/System.err(311): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-27 07:25:27.419: W/System.err(311): at dalvik.system.NativeStart.main(Native Method)
12-27 07:25:44.018: D/dalvikvm(311): Debugger has detached; object registry had 1 entries
12-27 07:27:02.779: W/System.err(354): org.apache.harmony.xml.ExpatParser$ParseException: At line 1, column 566: no element found
12-27 07:27:02.788: W/System.err(354): at org.apache.harmony.xml.ExpatParser.finish(ExpatParser.java:553)
12-27 07:27:02.788: W/System.err(354): at org.apache.harmony.xml.ExpatParser.parseDocument(ExpatParser.java:493)
12-27 07:27:02.788: W/System.err(354): at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:308)
12-27 07:27:02.788: W/System.err(354): at org.apache.harmony.xml.ExpatReader.parse(ExpatReader.java:264)
12-27 07:27:02.788: W/System.err(354): at mars.mp3player.Mp3ListActivity.parse(Mp3ListActivity.java:105)
12-27 07:27:02.788: W/System.err(354): at mars.mp3player.Mp3ListActivity.updateListView(Mp3ListActivity.java:85)
12-27 07:27:02.788: W/System.err(354): at mars.mp3player.Mp3ListActivity.onCreate(Mp3ListActivity.java:50)
12-27 07:27:02.788: W/System.err(354): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-27 07:27:02.798: W/System.err(354): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-27 07:27:02.798: W/System.err(354): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)
12-27 07:27:02.798: W/System.err(354): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
12-27 07:27:02.798: W/System.err(354): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
12-27 07:27:02.798: W/System.err(354): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651)
12-27 07:27:02.798: W/System.err(354): at android.widget.TabHost.setCurrentTab(TabHost.java:323)
12-27 07:27:02.798: W/System.err(354): at android.widget.TabHost.addTab(TabHost.java:213)
12-27 07:27:02.798: W/System.err(354): at mars.mp3player.MainActivity.onCreate(MainActivity.java:24)
12-27 07:27:02.798: W/System.err(354): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-27 07:27:02.809: W/System.err(354): at android.os.Handler.dispatchMessage(Handler.java:99)
12-27 07:27:02.809: W/System.err(354): at android.os.Looper.loop(Looper.java:123)
12-27 07:27:02.809: W/System.err(354): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-27 07:27:02.809: W/System.err(354): at java.lang.reflect.Method.invokeNative(Native Method)
12-27 07:27:02.809: W/System.err(354): at java.lang.reflect.Method.invoke(Method.java:521)
12-27 07:27:02.820: W/System.err(354): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-27 07:27:02.820: W/System.err(354): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-27 07:27:02.820: W/System.err(354): at dalvik.system.NativeStart.main(Native Method)
12-27 07:30:56.855: E/MediaPlayer(354): error (1, -2147483648)
12-27 07:30:56.855: E/MediaPlayer(354): Error (1,-2147483648)
或者是 relase方法执行了 你又调用mediaplayer播放的问题;
你参考一下他的代码