Android媒体播放器在第一次播放后停止

Question

//这是经过编辑的有效代码：

我一直在试图找到不同的方法来修复它，但看起来我必须寻求帮助。

媒体播放器第一次播放该文件，以后再也不会播放。这是代码：

btn_default_acc = (ImageButton) layout.findViewById(R.id.btn_df_acc);
        btn_default_acc.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                try {if(sentencePlayer==null){
                        sentencePlayer  = new MediaPlayer();
                    }sentencePlayer.reset();
                    sentencePlayer.setDataSource(fd.getFileDescriptor(), fd.getStartOffset(), fd.getLength());
                    sentencePlayer.prepare();
                    sentencePlayer.start();
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        });
        sentencePlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer sentencePlayer) {
                sentencePlayer.stop();

            }
        });

以及logcat：01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: java.lang.IllegalStateException 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at android.media.MediaPlayer._setDataSource(Native Method) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1254) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at com.testapp.imre.testapp.Lesson1Reading$11.onClick(Lesson1Reading.java:1134) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at android.view.View.performClick(View.java:5156) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at android.view.View$PerformClick.run(View.java:20755) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at android.os.Handler.handleCallback(Handler.java:739) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at android.os.Looper.loop(Looper.java:145) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at android.app.ActivityThread.main(ActivityThread.java:5832) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at java.lang.reflect.Method.invoke(Native Method) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at java.lang.reflect.Method.invoke(Method.java:372) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399) 01-11 13:28:36.744 9044-9044/com.testapp.imre.testapp W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

我还修改了关闭屏幕的方法：

private View.OnClickListener close_popup_screen_listener = new View.OnClickListener() { public void onClick(View v) { if (sentencePlayer != null){ sentencePlayer.stop(); } popUpScreen.dismiss(); try { fd.close(); } catch (IOException e) { e.printStackTrace(); } stopMediaRecorder(); } };

Answer 1

尝试添加sentencePlayer.reset（）；

在设置数据源之前

Answer 2

你能去掉下面两行吗？

sentencePlayer.reset();
sentencePlayer.release();

你的方法应该如下所示：

    sentencePlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer sentencePlayer) {
            sentencePlayer.stop();
        }
    });

编辑1：

删除以下行：

sentencePlayer.reset();

在行下添加：

if(sentencePlayer==null){
 sentencePlayer  = new MediaPlayer();
}

希望这对你有帮助。