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经过两周的尝试解决与我的媒体播放器代码问题继续有用户报告崩溃,我在我的智慧结束试图看看我做错了什么。Android媒体播放器不断崩溃
媒体播放器和背景声音对象初始化主类:
public class GameOver extends Activity{
public AdView adView;
BackgroundSound mBackgroundSound;
MediaPlayer mMediaPlayer;
这里是我的媒体播放器的代码和与之相关联的方法,我不叫上带回点什么压:
public class BackgroundSound extends AsyncTask<Void, Void, Void> {
protected void onPreExecute() {
mMediaPlayer = MediaPlayer.create(GameOver.this, R.raw.welldone);
}
protected Void doInBackground(Void... params) {
mMediaPlayer.setVolume(100, 100);
mMediaPlayer.start();
mMediaPlayer.setLooping(true); // Set looping
return null;
}
protected void onCancelled(Void v) {
try {
mMediaPlayer.stop();
mMediaPlayer.reset();
mMediaPlayer.release();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
public void onPause() {
super.onPause();
mBackgroundSound.onCancelled((Void) null);
}
public void onResume() {
super.onResume();
mBackgroundSound = new BackgroundSound();
mBackgroundSound.execute((Void) null);
}
以下是一些示例性崩溃:
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:200)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
at java.lang.Thread.run(Thread.java:1019)
Caused by: java.lang.IllegalStateException
at android.media.MediaPlayer.setVolume(Native Method)
at com.deucalion0.findtheanimal.Menu$BackgroundSound.doInBackground(Menu.java:235)
at com.deucalion0.findtheanimal.Menu$BackgroundSound.doInBackground(Menu.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
... 4 more
而另一个:
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:299)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Caused by: java.lang.IllegalStateException
at android.media.MediaPlayer.setLooping(Native Method)
at com.deucalion0.findtheanimal.Menu$BackgroundSound.doInBackground(Menu.java:234)
at com.deucalion0.findtheanimal.Menu$BackgroundSound.doInBackground(Menu.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:287)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
... 5 more
我看了很多问题#1,试图让谷歌文档的感觉,一切我都试过似乎是一个不好解决。我不知道如何着手,可有人请指教?
谢谢你的建议我会试试这个,但是在这个问题上花了几个星期,当我现在看代码的时候,我的脑海里一片空白。如果你有时间可以在某些时候向你展示你的意思,这将是一个很大的帮助。再次感谢你的回答,这给了我一些更好的线索,知道发生了什么。 – deucalion0
我添加了一些示例源代码。 – hunyadym