相关疑难解决方法(0)

更一般地说,如果设备有多个嵌入式摄像头,是否有办法初始化其中一个？

我没有在Android参考文档中找到它:

• https://developer.android.com/reference/android/hardware/Camera.html
• https://developer.android.com/reference/android/hardware/camera2/package-summary.html
• https://developer.android.com/reference/android/hardware/camera2/CameraManager.html

三星SHW-M100S有两个摄像头.如果没有参考使用两个相机,任何想法三星怎么做...？

我有一个名为switchCamera的方法,我试图在点击按钮时从前向后切换相机,在一个平滑的过渡中.当我打电话给这个方法时,我的应用程序冻结了 - 我知道我做的不对.有人可以帮我从这里出去吗？

任何帮助深表感谢.

public void switchCamera(){
    int camNum = 0;
    camNum = Camera.getNumberOfCameras();
    int camBackId = Camera.CameraInfo.CAMERA_FACING_BACK;
    int camFrontId = Camera.CameraInfo.CAMERA_FACING_FRONT;

    Camera.CameraInfo currentCamInfo = new Camera.CameraInfo();

    //if camera is running
    if (camera != null){
        //and there is more than one camera
        if (camNum > 1){
            //stop current camera
            camera.stopPreview();
            camera.setPreviewCallback(null);
            //camera.takePicture(null, null, PictureCallback);
            camera.release();
            camera = null;
            //stop surfaceHolder?

            if (currentCamInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT){
                //switch camera to back camera
                camera=Camera.open(camBackId);
            }
            else{
                //switch camera to front camera
                camera=Camera.open(camFrontId);
            }
            //switch …

我想使用开关摄像头功能.目前我开发了一款相机对象,可以很好地用于后置摄像头,但不能用于前置摄像头.我无法找到前后摄像头之间切换的解决方案.这是我的代码..!

 public class MyCamera extends Activity implements SurfaceHolder.Callback,
    Camera.ShutterCallback, Camera.PictureCallback {
    Camera mCamera;
    SurfaceView mPreview;
    String filePath;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.camera_preview);
        mPreview = (SurfaceView) findViewById(R.id.preview);
        mPreview.getHolder().addCallback(this);
        mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        mCamera = Camera.open();
    }

    @Override
    public void onPause() {
        super.onPause();
        mCamera.stopPreview();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        mCamera.release();
        Log.d("CAMERA", "Destroy");
    }

    public void onCancelClick(View v) {
        finish();
    }

    public void onSnapClick(View v) {
        mCamera.takePicture(this, null, null, this);
    }

    @Override
    public void onShutter() {
        Toast.makeText(this, "Click!", Toast.LENGTH_SHORT).show();
    }

    @Override …