我的Android进阶之旅------>Android中MediaRecorder.stop()报错 java.lang.RuntimeException: stop failed.

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今天在调用MediaRecorder.stop()，报错了，Java.lang.RuntimeException: stop failed.

 E/AndroidRuntime(7698): Cause by: java.lang.RuntimeException: stop failed.
 E/AndroidRuntime(7698):            at android.media.MediaRecorder.stop(Native Method)
 E/AndroidRuntime(7698):            at com.tintele.sos.VideoRecordService.stopRecord(VideoRecordService.java:298)

报错代码如下：

 if (mediarecorder != null) {
         mediarecorder.stop();
         mediarecorder.release();
         mediarecorder = null;
         if (mCamera != null) {
             mCamera.release();
             mCamera = null;
         }
     }

stop()方法源代码如下：

 /**
      * Stops recording. Call this after start(). Once recording is stopped,
      * you will have to configure it again as if it has just been constructed.
      * Note that a RuntimeException is intentionally thrown to the
      * application, if no valid audio/video data has been received when stop()
      * is called. This happens if stop() is called immediately after
      * start(). The failure lets the application take action accordingly to
      * clean up the output file (delete the output file, for instance), since
      * the output file is not properly constructed when this happens.
      *
      * @throws IllegalStateException if it is called before start()
      */
     public native void stop() throws IllegalStateException;

源代码中说了：Note that a RuntimeException is intentionally thrown to the application, if no valid audio/video data has been received when stop() is called. This happens if stop() is called immediately after start().

现在，在mediarecorder.stop();这一句报错了，现在在mediarecorder.stop();这句之前加几句就不会报错了

mediarecorder.setOnErrorListener(null);
mediarecorder.setOnInfoListener(null);  
mediarecorder.setPreviewDisplay(null);

改后代码如下：

 if (mediarecorder != null) {
             //added by ouyang start
             try {
                 //下面三个参数必须加，不加的话会奔溃，在mediarecorder.stop();
                 //报错为：RuntimeException:stop failed
                 mediarecorder.setOnErrorListener(null);
                 mediarecorder.setOnInfoListener(null);
                 mediarecorder.setPreviewDisplay(null);
                 mediarecorder.stop();
             } catch (IllegalStateException e) {
                 // TODO: handle exception
                 Log.i("Exception", Log.getStackTraceString(e));
             }catch (RuntimeException e) {
                 // TODO: handle exception
                 Log.i("Exception", Log.getStackTraceString(e));
             }catch (Exception e) {
                 // TODO: handle exception
                 Log.i("Exception", Log.getStackTraceString(e));
             }
             //added by ouyang end

             mediarecorder.release();
             mediarecorder = null;
             if (mCamera != null) {
                 mCamera.release();
                 mCamera = null;
             }
         }