如何在Android模拟器4.0中启用网络摄像头？

在我的应用程序中，我想使用Camera选项，所以我使用下面的代码来捕获视频 .

public class CameraDemoActivity extends Activity
      {
  private static final int CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE = 200;
  private Uri fileUri;
  public static final int MEDIA_TYPE_VIDEO = 2;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Context context = this;
    PackageManager packageManager = context.getPackageManager();

    // if device support camera?
    if (packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
        //yes
        Log.i("camera", "This device has camera!");
        Toast.makeText(getBaseContext(), "Camera device", Toast.LENGTH_LONG).show();

        Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

        fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO);  // create a file to save the video
        intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);  // set the image file name
        intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT,2);
        intent.putExtra(MediaStore.INTENT_ACTION_VIDEO_CAMERA, true);
        intent.putExtra(MediaStore.MEDIA_SCANNER_VOLUME, 100);

        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); // set the video image quality to high


        // start the Video Capture Intent
        startActivityForResult(intent, CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE);


    }else{
        //no
        Log.i("camera", "This device has no camera!");
        Toast.makeText(getBaseContext(), "No Camera device", Toast.LENGTH_LONG).show();
    }



}

private static Uri getOutputMediaFileUri(int type){
      return Uri.fromFile(getOutputMediaFile(type));
}



/** Create a File for saving an image or video */
private static File getOutputMediaFile(int type)
{
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
              Environment.DIRECTORY_DOWNLOADS), "MyCameraApp");

    if (! mediaStorageDir.exists()){
        if (! mediaStorageDir.mkdirs()){
            System.out.println("MyCameraApp");
            return null;
        }
    }

    // Create a media file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    File mediaFile;
    if(type == MEDIA_TYPE_VIDEO) 
    {
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
        "VID_"+ timeStamp + ".mp4");
    }
    else 
    {
        return null;
    }

    return mediaFile;
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (requestCode == CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            // Video captured and saved to fileUri specified in the Intent
            Toast.makeText(this, "Video saved to:\n" +
                     data.getData(), Toast.LENGTH_LONG).show();
            System.out.println("Video saved to:"+data.getData());
        } else if (resultCode == RESULT_CANCELED) {
            Toast.makeText(this, "video cancel", Toast.LENGTH_LONG).show();
            // User cancelled the video capture
        } else {
            System.out.println("video capyured failed.>.1!!!!");
            // Video capture failed, advise user
        }
    }
}

}

在上面的代码中，我在模拟器中获取视频屏幕，但它像记录为盒子的方块，这是黑白框... !!!!!!!!!!!

在模拟器中，我无法获得实时视频，也无法启用网络摄像头 .

有趣的是，这段代码已成功运行在另一台计算机上（戴尔网络摄像头） . 在那台机器上它的启动网络摄像头和录制视频非常缓慢，但这是在模拟器中识别并启用相机 .

另一台机器是Compaq，不幸的是它没有工作，也没有识别网络摄像头 .

请帮助激活此网络摄像头设施 .