廣東話setCamera向前記錄

Question

這是我的代碼：

package eye.sight.test; 

import java.io.IOException; 

import android.app.Activity; 
import android.hardware.Camera; 
import android.media.CamcorderProfile; 
import android.media.MediaRecorder; 
import android.os.Bundle; 
import android.view.SurfaceHolder; 
import android.view.SurfaceView; 
import android.view.View; 
import android.widget.Button; 

public class AndroidVideoCapture extends Activity implements SurfaceHolder.Callback{ 

    Button myButton; 
    MediaRecorder mediaRecorder; 
    SurfaceHolder surfaceHolder; 
    boolean recording; 
    Camera c; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     recording = false; 
     setContentView(R.layout.main1); 
     initMediaRecorder(); 

     SurfaceView myVideoView = (SurfaceView)findViewById(R.id.videoview); 
     surfaceHolder = myVideoView.getHolder(); 
     surfaceHolder.addCallback(this); 
     surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 

     myButton = (Button)findViewById(R.id.mybutton); 
     myButton.setOnClickListener(myButtonOnClickListener); 
    } 

    private Button.OnClickListener myButtonOnClickListener 
    = new Button.OnClickListener(){ 

     @Override 
     public void onClick(View arg0) { 
      // TODO Auto-generated method stub 
      if(recording){ 
       mediaRecorder.stop(); 
       mediaRecorder.release(); 
       finish(); 
      }else{ 
       mediaRecorder.start(); 
       recording = true; 
       myButton.setText("STOP"); 
      } 
     }}; 

     @Override 
     public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) { 
      // TODO Auto-generated method stub 

     } 
     @Override 
     public void surfaceCreated(SurfaceHolder arg0) { 
      // TODO Auto-generated method stub 
      prepareMediaRecorder(); 
     } 
     @Override 
     public void surfaceDestroyed(SurfaceHolder arg0) { 
      // TODO Auto-generated method stub 

     } 

     private void initMediaRecorder(){ 

      mediaRecorder = new MediaRecorder(); 
     // c.unlock(); 
     // c = Camera.open(Camera.CameraInfo.CAMERA_FACING_FRONT); 

    //  mediaRecorder.setCamera(c); 


      mediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); 
      mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); 
      CamcorderProfile camcorderProfile_HQ = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH); 
      mediaRecorder.setProfile(camcorderProfile_HQ); 
      mediaRecorder.setOutputFile("/sdcard/myvideo.mp4"); 
      mediaRecorder.setMaxDuration(60000); 
      //mediaRecorder.setMaxFileSize(5000000); 
     } 

     private void prepareMediaRecorder(){ 
      mediaRecorder.setPreviewDisplay(surfaceHolder.getSurface()); 
      try { 
       mediaRecorder.prepare(); 
      } catch (IllegalStateException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
     } 
} 

我一直在谷歌上搜索周圍相當多的關於如何使用前置攝像頭，但沒有運氣有任何責任。我在這裏錯過了什麼？它在默認情況下工作得很好，但我不確定何時以及如何使用Camera.open（Camera.CameraInfo.CAMERA_FACING_FRONT）;和Came.unlock（）;.

感謝

Answer 1

嘗試這樣做

private Camera FrontCamera() 
{ 
int cameraCount = 0; 
Camera cam = null; 
Camera.CameraInfo cameraInfo = new Camera.CameraInfo(); 
cameraCount = Camera.getNumberOfCameras(); 
for (int camIdx = 0; camIdx < cameraCount; camIdx++) { 
    Camera.getCameraInfo(camIdx, cameraInfo); 
    if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT ) { 
     try { 
      cam = Camera.open(camIdx); 
     } catch (RuntimeException e) { 
      Log.e(TAG, "Camera failed to open: " + e.getLocalizedMessage()); 
     } 
    } 
} 

return cam; 
} 

另外補充清單文件，以下

<uses-permission android:name="android.permission.CAMERA" /> 
<uses-feature android:name="android.hardware.camera" android:required="false" /> 
<uses-feature android:name="android.hardware.camera.front" android:required="false" />