アプリで mp3 ファイルをストリーミングする必要がありますが、サーバーにある mp3 ファイルが見つからない場合に問題が発生します。したがって、その場所にmp3がない場合を除いて、私のコードはうまく機能します。それが起こるたびに、アプリがクラッシュします。誰かがこのエラーをキャッチして、その場所に mp3 オーディオがない場合にアプリがクラッシュしないようにすることができますか?
これが私のコードです:
mediaPlayer.setDataSource(data.get(position)
.getSONG_MP3());
new AsyncTask<Void, Void, Void>() {
@Override
protected void onPreExecute() {
bufferingDialog.setMessage(activity
.getString(R.string.buffering));
bufferingDialog.show();
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... params) {
try {
mediaPlayer.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
Log.v("--", "4");
bufferingDialog.dismiss();
((AlbumDetails) activity)
.changePicToPlay(position);
playSong.setBackgroundResource(R.drawable.play_nr);
Toast.makeText(activity,
"Song not existing",
Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
mediaPlayer.start();
return null;
}
@Override
protected void onPostExecute(Void result) {
if (bufferingDialog.isShowing())
bufferingDialog.dismiss();
super.onPostExecute(result);
}
}.execute();
これは logCat の出力です。
08-29 17:54:54.811: E/AndroidRuntime(8701): FATAL EXCEPTION: AsyncTask #3
08-29 17:54:54.811: E/AndroidRuntime(8701): java.lang.RuntimeException: An error occured while executing doInBackground()
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.os.AsyncTask$3.done(AsyncTask.java:278)
08-29 17:54:54.811: E/AndroidRuntime(8701): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
08-29 17:54:54.811: E/AndroidRuntime(8701): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
08-29 17:54:54.811: E/AndroidRuntime(8701): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
08-29 17:54:54.811: E/AndroidRuntime(8701): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
08-29 17:54:54.811: E/AndroidRuntime(8701): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
08-29 17:54:54.811: E/AndroidRuntime(8701): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
08-29 17:54:54.811: E/AndroidRuntime(8701): at java.lang.Thread.run(Thread.java:856)
08-29 17:54:54.811: E/AndroidRuntime(8701): Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4050)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:709)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.view.View.requestLayout(View.java:12677)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.view.View.requestLayout(View.java:12677)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.view.View.requestLayout(View.java:12677)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.view.View.requestLayout(View.java:12677)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.widget.RelativeLayout.requestLayout(RelativeLayout.java:268)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.view.View.requestLayout(View.java:12677)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.widget.AbsListView.requestLayout(AbsListView.java:1690)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.widget.AdapterView$AdapterDataSetObserver.onChanged(AdapterView.java:801)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.widget.AbsListView$AdapterDataSetObserver.onChanged(AbsListView.java:5592)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.database.DataSetObservable.notifyChanged(DataSetObservable.java:35)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.widget.BaseAdapter.notifyDataSetChanged(BaseAdapter.java:50)
08-29 17:54:54.811: E/AndroidRuntime(8701): at com.outsourcefarm.musicagratis.activities.AlbumDetails.changePicToPlay(AlbumDetails.java:228)
08-29 17:54:54.811: E/AndroidRuntime(8701): at com.outsoucefarm.musicagratis.functions.AlbumDetailsAdapter$2$1.doInBackground(AlbumDetailsAdapter.java:194)
08-29 17:54:54.811: E/AndroidRuntime(8701): at com.outsoucefarm.musicagratis.functions.AlbumDetailsAdapter$2$1.doInBackground(AlbumDetailsAdapter.java:1)
08-29 17:54:54.811: E/AndroidRuntime(8701): at android.os.AsyncTask$2.call(AsyncTask.java:264)
08-29 17:54:54.811: E/AndroidRuntime(8701): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
08-29 17:54:54.811: E/AndroidRuntime(8701): ... 5 more
誰かが私を助けることができますか?