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Nexus 7을 가지고 오디오 파일을 재생하면이 오류가 발생하고 강제 종료됩니다. 나는 하루 종일 해결책을 찾고 있었다. 여기에 관련 코드가있다 :Nexus 7 파일을 열지 못했습니다. 권한이 거부되었습니다.
protected void onListItemClick(ListView l, View v, int position, long id) {
playSong(MEDIA_PATH + songs.get(position));
textViewRecordPlaying.setText(songs.get(position));
}
private void playSong(String songPath) {
final Intent i = new Intent(MusicService.ACTION_URL);
File file = new File(songPath);
Uri uri = Uri.fromFile(file);
i.setData(uri);
startService(i);
}
playSong(MEDIA_PATH + songs.get(position));
내 MEDIA_PATH :
private static final String MEDIA_PATH = new String(Environment
.getExternalStorageDirectory().getPath() + "/AudioStreamRecorder/");
이 코드는 내 갤럭시 S3 내 썬더 볼트에 아름답게 작동하지만이 목록의 항목을 클릭 할 때 내가 넥서스 7 Failed to open file. Permission denied. 오류 및 Asus Transformer Prime TF201, 그 후 강제 종료.
동일한 오류로 Environment.getExternalStorageDirectory(); 및 Environment.getExternalStorageDirectory()getAbsolutePath();을 시도했습니다. 나는 이것이 NullPoingterException의 원인이되는 ... 나는 playSong 방법에서이 왼쪽
05-07 16:47:35.714: I/Streaming Radio Recorder Pro(4427): debug: Creating service
05-07 16:47:35.724: I/MusicRetriever(4427): Querying media...
05-07 16:47:35.724: I/MusicRetriever(4427): URI: content://media/external/audio/media
05-07 16:47:35.724: I/Streaming Radio Recorder Pro(4427): Playing from URL/path: file:///storage/emulated/0/AudioStreamRecorder/The%20Dining%20Rooms%20-%20triste%2C%20solitario%20y%20final-3.54.44%20Tuesday%2C%20May%207%2C%202013.mp3
05-07 16:47:35.724: I/AudioService(436): AudioFocus requestAudioFocus() from [email protected][email protected]
05-07 16:47:35.724: I/AwesomePlayer(128): setDataSource_l(URL suppressed)
05-07 16:47:35.724: I/MusicRetriever(4427): Query finished. Returned a cursor.
05-07 16:47:35.724: I/MusicRetriever(4427): Listing...
05-07 16:47:35.724: I/MusicRetriever(4427): Title column index: 8
05-07 16:47:35.724: I/MusicRetriever(4427): ID column index: 8
05-07 16:47:35.724: I/MusicRetriever(4427): ID: 21 Title: Join Hangout
05-07 16:47:35.724: I/MusicRetriever(4427): ID: 2305 Title: The Dining Rooms - triste, solitario y final-3.54.44 Tuesday, May 7, 2013
05-07 16:47:35.724: I/MusicRetriever(4427): Done querying media. MusicRetriever is ready.
05-07 16:47:35.734: E/(128): Failed to open file '/storage/emulated/0/AudioStreamRecorder/The Dining Rooms - triste, solitario y final-3.54.44 Tuesday, May 7, 2013.mp3'. (Permission denied)
05-07 16:47:35.734: E/MediaPlayer(4427): error (1, -2147483648)
05-07 16:47:35.734: E/MediaPlayer(4427): Error (1,-2147483648)
05-07 16:47:35.734: E/Streaming Radio Recorder Pro(4427): Error: what=1, extra=-2147483648
05-07 16:47:35.764: I/AudioService(436): AudioFocus abandonAudioFocus() from [email protected][email protected]
05-07 16:47:36.704: D/AndroidRuntime(4427): Shutting down VM
05-07 16:47:36.704: W/dalvikvm(4427): threadid=1: thread exiting with uncaught exception (group=0x41f66930)
05-07 16:47:36.714: E/AndroidRuntime(4427): FATAL EXCEPTION: main
05-07 16:47:36.714: E/AndroidRuntime(4427): java.lang.NullPointerException
05-07 16:47:36.714: E/AndroidRuntime(4427): at com.LudwigAppDesign.streamingradioplayerpro.Songs$8.run(Songs.java:407)
05-07 16:47:36.714: E/AndroidRuntime(4427): at android.os.Handler.handleCallback(Handler.java:725)
05-07 16:47:36.714: E/AndroidRuntime(4427): at android.os.Handler.dispatchMessage(Handler.java:92)
05-07 16:47:36.714: E/AndroidRuntime(4427): at android.os.Looper.loop(Looper.java:137)
05-07 16:47:36.714: E/AndroidRuntime(4427): at android.app.ActivityThread.main(ActivityThread.java:5041)
05-07 16:47:36.714: E/AndroidRuntime(4427): at java.lang.reflect.Method.invokeNative(Native Method)
05-07 16:47:36.714: E/AndroidRuntime(4427): at java.lang.reflect.Method.invoke(Method.java:511)
05-07 16:47:36.714: E/AndroidRuntime(4427): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-07 16:47:36.714: E/AndroidRuntime(4427): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-07 16:47:36.714: E/AndroidRuntime(4427): at dalvik.system.NativeStart.main(Native Method)
05-07 16:47:36.724: W/ActivityManager(436): Force finishing activity com.LudwigAppDesign.streamingradioplayerpro/.Songs
05-07 16:47:36.784: D/dalvikvm(436): GC_FOR_ALLOC freed 3517K, 29% free 17724K/24840K, paused 57ms, total 57ms
05-07 16:47:37.294: W/ActivityManager(436): Activity pause timeout for ActivityRecord{42c1cd18 u0 com.LudwigAppDesign.streamingradioplayerpro/.Songs}
05-07 16:47:46.794: W/ActivityManager(436): Launch timeout has expired, giving up wake lock!
05-07 16:47:47.304: W/ActivityManager(436): Activity idle timeout for ActivityRecord{42b7ced0 u0 com.LudwigAppDesign.streamingradioplayerpro/.Main}
05-07 16:48:05.824: W/ThrottleService(436): unable to find stats for iface rmnet0
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 나는 아이디어가 부족했습니다 도와주세요
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 사람을 ... 선언 한?
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
MusicService.mPlayer
.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer arg0) {
nextSong();
}
});
}
}, 1000);
}
private void nextSong() {
if (++currentPosition >= songs.size()) {
currentPosition = 0;
} else {
// Play next song
playSong(MEDIA_PATH + songs.get(currentPosition));
textViewRecordPlaying.setText(songs.get(currentPosition));
SharedPreferences settings = getSharedPreferences(
RECORDINGS_NOW_PLAYING, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString("nowPlayingTitle", (songs.get(currentPosition).toString().trim()));
// Commit the edits!
editor.commit();
}
}
편집 --- 안녕하세요이 코드를 제거하고, NullPointerException가 사라 :
05-08 12:23:26.838: I/Streaming Radio Recorder Pro(2661): Playing from URL/path: file:///storage/emulated/0/AudioStreamRecorder/Goudron%20-%20Art%20School%20Fuckheads-5.55.51%20Tuesday%2C%20May%207%2C%202013.mp3
05-08 12:23:26.838: I/AudioService(482): AudioFocus requestAudioFocus() from [email protected][email protected]
05-08 12:23:26.848: I/AwesomePlayer(128): setDataSource_l(URL suppressed)
05-08 12:23:26.848: I/MusicRetriever(2661): Querying media...
05-08 12:23:26.858: I/MusicRetriever(2661): URI: content://media/external/audio/media
05-08 12:23:26.858: E/(128): Failed to open file '/storage/emulated/0/AudioStreamRecorder/Goudron - Art School Fuckheads-5.55.51 Tuesday, May 7, 2013.mp3'. (Permission denied)
05-08 12:23:26.858: E/MediaPlayer(2661): error (1, -2147483648)
05-08 12:23:26.858: E/MediaPlayer(2661): Error (1,-2147483648)
05-08 12:23:26.898: D/dalvikvm(584): GC_CONCURRENT freed 518K, 7% free 9075K/9736K, paused 3ms+3ms, total 32ms
05-08 12:23:26.898: E/Streaming Radio Recorder Pro(2661): Error: what=1, extra=-2147483648
05-08 12:23:26.928: I/AudioService(482): AudioFocus abandonAudioFocus() from [email protected][email protected]
05-08 12:23:26.928: I/MusicRetriever(2661): Query finished. Returned a cursor.
05-08 12:23:26.928: I/MusicRetriever(2661): Listing...
05-08 12:23:26.928: I/MusicRetriever(2661): Title column index: 8
05-08 12:23:26.928: I/MusicRetriever(2661): ID column index: 8
05-08 12:23:26.928: I/MusicRetriever(2661): ID: 21 Title: Join Hangout
05-08 12:23:26.928: I/MusicRetriever(2661): ID: 1553 Title: Goudron - Art School Fuckheads-5.55.51 Tuesday, May 7, 2013
05-08 12:23:26.928: I/MusicRetriever(2661): ID: 1694 Title: Lusine Icl - Mod-10.47.59 Tuesday, May 7, 2013
05-08 12:23:26.928: I/MusicRetriever(2661): Done querying media. MusicRetriever is ready.
I :
이제Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
MusicService.mPlayer
.setOnCompletionListener(new OnCompletionListener() {
public void onCompletion(MediaPlayer arg0) {
nextSong();
}
});
}
}, 1000);
난 그냥 거부 권한의 원래 오류 남아 있어요 도움이되기를 바랍니다. 정보를 더 필요로하고 시험해 주셔서 감사드립니다.
외부 저장 장치에 더미 txt 파일을 넣어 시도하고 당신이 코드에서 그것을 읽을 수 있는지로 전환 2 주 후에이 나타났습니다. 어쩌면 파일 경로를 사용자의 의도와 함께 전달하고 서비스 측에서 URI를 가져 오는 것도 좋습니다. 나는 그것이 왜 바뀌는 지 알지 못한다. – FoamyGuy
문자열 연결을 사용하여 파일 경로를 생성하지 마십시오. 적절한'File' 생성자를 사용하십시오. 그 이상으로, 전체 스택 추적을 게시하십시오. – CommonsWare
여기서 스택 추적을 올바르게 수행하려면 어떻게해야합니까? –