1. E/AndroidRuntime(7698): Cause by: java.lang.RuntimeException: stop failed.  

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

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);

 修改之后：

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;  
            }  
        }