添加 CameraInstance() 以查看

Question

尝试将来自手机摄像头的提要添加到视图中，以便我可以显示它。我一直在学习教程并解决了除此之外的所有其他问题。这是有问题的代码：

private Camera mCamera;
private CameraPreview mPreview;
private SurfaceHolder mHolder;

public CameraPreview(CameraPreview context, Camera camera) {
    super(context);
    mCamera = camera;

    // Install a SurfaceHolder.Callback so we get notified when the
    // underlying surface is created and destroyed.
    mHolder = getHolder();
    mHolder.addCallback(this);
    // deprecated setting, but required on Android versions prior to 3.0
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_camera);
mCamera = getCameraInstance();
mPreview = new CameraPreview(this, mCamera);
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(mPreview);
}

我收到错误消息：

Error:(63, 25) error: incompatible types: CameraPreview cannot be converted to View

非常感谢您对此的任何帮助，如果人们想看到它，我也会发布更多代码。它本质上只是本教程：http://developer.android.com/guide/topics/media/camera.html

Answer 1

尝试使用它而不是您的相机预览

 public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
        private SurfaceHolder mHolder;
        private Camera mCamera;

        public CameraPreview(Context context, Camera camera) {
            super(context);
            mCamera = camera;

            // Install a SurfaceHolder.Callback so we get notified when the
            // underlying surface is created and destroyed.
            mHolder = getHolder();
            mHolder.addCallback(this);
            // deprecated setting, but required on Android versions prior to 3.0
            mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        }

        public void surfaceCreated(SurfaceHolder holder) {
            // The Surface has been created, now tell the camera where to draw the preview.
            try {
                mCamera.setDisplayOrientation(90);
                mCamera.setPreviewDisplay(holder);

                mCamera.startPreview();
            } catch (IOException e) {
                Log.d("camera", "Error setting camera preview: " + e.getMessage());
            }
        }

        public void surfaceDestroyed(SurfaceHolder holder) {
            // empty. Take care of releasing the Camera preview in your activity.
        }

        public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {

            if (mHolder.getSurface() == null){
                return;
            }

            try {
                mCamera.stopPreview();
            } catch (Exception e){
            }
            try {
                mCamera.setPreviewDisplay(mHolder);
                mCamera.startPreview();

            } catch (Exception e){
                Log.d("camera", "Error starting camera preview: " + e.getMessage());
            }
        }
    }