Android MediaPlayer'；s字幕功能不工作（SRT文件）

我正在尝试显示.srt文件中的字幕。（适用于Android 4.1+） 设备中同时存在mp4文件和srt文件

public class MainActivity extends Activity implements SurfaceHolder.Callback, OnPreparedListener{

MediaPlayer mediaPlayer;
SurfaceHolder surfaceHolder;
SurfaceView playerSurfaceView;
TextView tv_subtitle;
String videoSrc = Environment.getExternalStorageDirectory().getPath() + "/video.mp4";
String subTitleSrc = Environment.getExternalStorageDirectory().getPath() + "/sub.srt";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    playerSurfaceView = (SurfaceView)findViewById(R.id.playersurface);
    tv_subtitle = (TextView)findViewById(R.id.tv_subtitle);
    surfaceHolder = playerSurfaceView.getHolder();
    surfaceHolder.addCallback(this);
}

@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {

}

@Override
public void surfaceCreated(SurfaceHolder arg0) {

    try {
        mediaPlayer = new MediaPlayer();
        mediaPlayer.setDisplay(surfaceHolder);
        mediaPlayer.setDataSource(videoSrc);
        mediaPlayer.setOnTimedTextListener(new MediaPlayer.OnTimedTextListener() {
            @Override
            public void onTimedText(final MediaPlayer mediaPlayer, final TimedText timedText) {
                if (timedText != null) {
                    Log.d("test", "subtitle: " + timedText.getText());
                }
            }
        });

        mediaPlayer.addTimedTextSource(subTitleSrc, MediaPlayer.MEDIA_MIMETYPE_TEXT_SUBRIP);
        mediaPlayer.prepare();
        mediaPlayer.setOnPreparedListener(this);
        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    } catch (Exception e) {
    }
}

@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
}

@Override
public void onPrepared(MediaPlayer mp) {
    mediaPlayer.start();
}

}

布局：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<SurfaceView
    android:id="@+id/playersurface"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

<TextView
    android:layout_gravity="center"
    android:id="@+id/tv_subtitle"
    android:textColor="@android:color/holo_red_dark"
    android:textSize="20sp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

未调用OnTimedTextListener。我的目标SDK是22，我的设备高于Android 4.1

我遗漏了什么吗？

我找到了答案
学分：

我的代码中缺少mediaPlayer.selectTrack（）方法

以下是完整的代码：

public class MainActivity extends Activity implements SurfaceHolder.Callback, OnPreparedListener{

MediaPlayer mediaPlayer;
SurfaceHolder surfaceHolder;
SurfaceView playerSurfaceView;
TextView tv_subtitle;
String videoSrc = Environment.getExternalStorageDirectory().getPath() + "/video.mp4";
String subTitleSrc = Environment.getExternalStorageDirectory().getPath() + "/sub.srt";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    playerSurfaceView = (SurfaceView)findViewById(R.id.playersurface);
    tv_subtitle = (TextView)findViewById(R.id.tv_subtitle);
    surfaceHolder = playerSurfaceView.getHolder();
    surfaceHolder.addCallback(this);
}

@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {

}


@Override
public void surfaceCreated(SurfaceHolder arg0) {

    try {
        mediaPlayer = new MediaPlayer();
        mediaPlayer.setDisplay(surfaceHolder);
        mediaPlayer.setDataSource(videoSrc);
        mediaPlayer.setOnPreparedListener(this);
        mediaPlayer.prepare();

        mediaPlayer.addTimedTextSource(subTitleSrc, MediaPlayer.MEDIA_MIMETYPE_TEXT_SUBRIP);
        int textTrackIndex = findTrackIndexFor(
                MediaPlayer.TrackInfo.MEDIA_TRACK_TYPE_TIMEDTEXT, mediaPlayer.getTrackInfo());
        if (textTrackIndex >= 0) {
            mediaPlayer.selectTrack(textTrackIndex);
        } else {
            Log.w("test", "Cannot find text track!");
        }

        mediaPlayer.setOnTimedTextListener(new MediaPlayer.OnTimedTextListener() {
            @Override
            public void onTimedText(final MediaPlayer mediaPlayer, final TimedText timedText) {
                if (timedText != null) {
                    Log.d("test", "subtitle: " + timedText.getText());
                }
            }
        });

        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
    } catch (Exception e) {
    }
}

private int findTrackIndexFor(int mediaTrackType, MediaPlayer.TrackInfo[] trackInfo) {
    int index = -1;
    for (int i = 0; i < trackInfo.length; i++) {
        if (trackInfo[i].getTrackType() == mediaTrackType) {
            return i;
        }
    }
    return index;
}

@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
}

@Override
public void onPrepared(MediaPlayer mp) {
    mediaPlayer.start();
}

公共类MainActivity扩展活动实现SurfaceHolder.Callback，OnPreparedListener{
媒体播放器；
浮雕浮雕；
SurfaceView播放器SurfaceView；
TextView电视字幕；
字符串videoSrc=Environment.getExternalStorageDirectory（）.getPath（）+“/video.mp4”；
字符串subTitleSrc=Environment.getExternalStorageDirectory（）.getPath（）+“/sub.srt”；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
playerSurfaceView=（SurfaceView）findViewById（R.id.playersurface）；
tv_subtitle=（TextView）findViewById（R.id.tv_subtitle）；
surfaceHolder=playerSurfaceView.getHolder（）；
surfaceHolder.addCallback（this）；
}
@凌驾
公共无效表面更改（表面更改arg0、int arg1、int arg2、int arg3）{
}
@凌驾
已创建公共空白表面（表面文件夹arg0）{
试一试{
mediaPlayer=新的mediaPlayer（）；
mediaPlayer.setDisplay（surfaceHolder）；
mediaPlayer.setDataSource（videoSrc）；
mediaPlayer.setOnPreparedListener（这个）；
mediaPlayer.prepare（）；
mediaPlayer.addTimedTextSource（subTitleSrc，mediaPlayer.MEDIA\u MIMETYPE\u TEXT\u SUBRIP）；
int textTrackIndex=findTrackIndexFor(
MediaPlayer.TrackInfo.MEDIA_TRACK_TYPE_TIMEDTEXT，MediaPlayer.getTrackInfo（））；
如果（textTrackIndex>=0）{
mediaPlayer。选择Track（textTrackIndex）；
}否则{
Log.w（“测试”，“找不到文本跟踪！”）；
}
setOnTimedTextListener（新的mediaPlayer.OnTimedTextListener（）{
@凌驾
public void onTimedText（final MediaPlayer MediaPlayer，final TimedText TimedText）{
if（timedText！=null）{
Log.d（“test”，“subtitle:+timedText.getText（））；
}
}
});
mediaPlayer.setAudioStreamType（AudioManager.STREAM_MUSIC）；
}捕获（例外e）{
}
}
私有int-findTrackIndexFor（int-mediaTrackType，MediaPlayer.TrackInfo[]TrackInfo）{
int指数=-1；
对于（int i=0；i

---

}

同样的问题E/Vitamio[4.2.1][Player]﹕ 本子标题无解码器0x53526970 E/Vitamio[4.2.1][Player]﹕ 未找到字幕数据