Taking photo in android

Question

Hi I am developing my app with Camera functionality with SurfaceView. I want to take picture when surface view created.

In my fragment's onCreateView method, initialized everything what I need.

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        view = inflater.inflate(R.layout.game_one_start_fragment, container, false);

        initWidgets(view);    
        return view;

    }

In initWidgets() method initialized the SurfaceView object as below

mSurfaceView = (SurfaceView) view.findViewById(R.id.game_action_surfaceview);
mSurfaceHolder = mSurfaceView.getHolder();

In OnResume() method getting the surfaceHolder object.

@Override
    public void onResume() {
        super.onResume();
        mSurfaceHolder.addCallback(this);
        mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        safeCameraOpen(Camera.CameraInfo.CAMERA_FACING_BACK);

    }

safeCameraOpen() I have followed the Android Developer link. Used the same code as mentioned.

The surfaceHolder.callback used as below

@Override
    public void surfaceCreated(SurfaceHolder holder) {

        mCamera.startPreview();

    }


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

        try {
//to set the picture orientation
            setCameraDisplayOrientation(getActivity(), findFrontFacingCameraID(), mCamera);
            mCamera.startPreview();
            mCamera.setPreviewDisplay(holder);

        } catch (IOException e) {

            e.printStackTrace();

        }

        Camera.Parameters parameters = mCamera.getParameters();
        parameters.getSupportedPreviewSizes();

        mCamera.setParameters(parameters);


    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        mCamera.stopPreview();
        mCamera.release();
    }

I want to take picture when the fragment loaded.

I have tried in OnViewCreated(),onResume() and onStart() lifecycle methods. Within them I have used the following line

 mCamera.takePicture(null,null,mPictureCallback);

(mCamera object created and initialized in safeCameraOpen() method)

If I tried within the mentioned lifecycle methods, I am getting the following crash error.

java.lang.RuntimeException: takePicture failed
            at android.hardware.Camera.native_takePicture(Native Method)
            at android.hardware.Camera.takePicture(Camera.java:1266)
            at android.hardware.Camera.takePicture(Camera.java:1211)
            at com.gaming.fragment.GameOneStartFragment.snapPicture(GameOneStartFragment.java:76)
            at com.gaming.fragment.GameOneStartFragment.surfaceCreated(GameOneStartFragment.java:284)
            at android.view.SurfaceView.updateWindow(SurfaceView.java:572)
            at android.view.SurfaceView.access$000(SurfaceView.java:86)
            at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:175)
            at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:847)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1897)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1019)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5725)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
            at android.view.Choreographer.doCallbacks(Choreographer.java:574)
            at android.view.Choreographer.doFrame(Choreographer.java:544)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5086)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
            at dalvik.system.NativeStart.main(Native Method)

But, when I use the takePicture() method of Camera object inside a button click it capture the picture.

How can I do take picture without view click ?

Answer 1

You don't call the startPreview method of Camera object. I think you should call startPreview before take a picture. In this case you didn't set the preview display:

try {
   camera.setPreviewDisplay(surface.getHolder());
} catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
}

Check this answer: How to take pictures from the camera without preview when my app starts?