2011-10-22 60 views
0

我正在爲android 2.1 - 2.3手機創建一個應用程序,我需要知道如何記錄視頻並在錄製視頻時實施閃光照明。我在下面的例子中看到了來自各種網站的示例代碼,它可以在2.1版本上運行,但是任何更高的代碼,預覽屏幕仍然很暗。如何使用自定義媒體錄製器進行錄製?

boolean recording=false; 
    Camera camera = null; 
    Parameters parameters; 
    SurfaceView cameraView = (SurfaceView) findViewById(R.id.surface_view); 
    holder = cameraView.getHolder(); 
    holder.addCallback(this); 
    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    holder.getSurface(); 

    private void prepareRecorder() 
{ 

    Log.d("BROADCAST", "Camera not null"); 
    recorder.setPreviewDisplay(holder.getSurface()); 
    try{ 

     recorder.prepare(); 


//implementing flash button below but fails as soon as recording begins when turned on 

     Button flash = (Button) findViewById (R.id.flash); 
     flash.setOnClickListener(new Button.OnClickListener(){ 
     @Override 
     public void onClick(View arg0) { 
     // TODO Auto-generated method stub 
     if(camera == null){ 
     camera = Camera.open(); 
     parameters = camera.getParameters(); 
     parameters.setFlashMode(Parameters.FLASH_MODE_TORCH); 
     camera.setParameters(parameters); 

     }else{ 
      parameters.setFlashMode(Parameters.FLASH_MODE_OFF); 
      camera.setParameters(parameters); 
      camera.release(); 
      camera = null; 
      } 

     }}); 


    } catch (IllegalStateException e) { 
     e.printStackTrace(); 
     finish(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
     finish(); 
    } 


} 



public void surfaceCreated(SurfaceHolder holder) 
    { 
    prepareRecorder(); 
    Log.v(TAG,"surfaceCreated"); 
    } 


public void surfaceChanged(SurfaceHolder holder, int format, int width, 
     int height) {} 

public void surfaceDestroyed(SurfaceHolder holder) 
    { 

    recorder.release(); 

    } 

當我點擊下面的這個按鈕,開始錄製,但在此之前屏幕是黑色的,並且不顯示預覽。

private Button.OnClickListener myButtonOnClickListener = new Button.OnClickListener(){ 
    @Override 
    public void onClick(View arg0) { 
     // TODO Auto-generated method stub 
      if (recording) { 

       recorder.stop(); 
      recorder.release();// stops the recording process 
      startActivity(new Intent("")); 

     finish(); 
     } 
     else { 
       recorder.start(); 
       counter.start(); 
       recording = true; 

      } 
    } 

}; 

我可能接近答案,但我只是需要一些指導,也許我在某處放錯了什麼?任何幫助就足夠了。提前致謝

回答

0

在你的prepareRecorder()方法中,在調用prepare()之前也要添加這一行。

recorder.setCamera(camera); 
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