Camera Preview Stretched on Few Android Devices

Question

I am making custom Camera like \"SnapChat\" for a Android app but camera preview is stretched on Few devices like(Moto g second generation , one+ one) but not on(Samsung s3,

Answer 1

try this it is working...

 public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {

private static final String TAG = "Camera Preview";
private static final double PREVIEW_SIZE_FACTOR = 3.00;
private SurfaceHolder mHolder = null;
private Camera mCamera = null;
Camera.Parameters _parameters=null;

@SuppressWarnings("deprecation")
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 {
        Camera.Parameters parameters = mCamera.getParameters();
        final Size mPreviewSize = getOptimalSize();
        parameters.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
         requestLayout();
        mCamera.setParameters(parameters);
        mCamera.setPreviewDisplay(holder);
        mCamera.startPreview();
        //startContinuousAutoFocus();
    } catch (Exception e) {
        Log.d(TAG, "Error setting camera preview: " + e.getMessage());
    }
}
public void surfaceDestroyed(SurfaceHolder holder) {
}

@SuppressLint("NewApi")
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    // If your preview can change or rotate, take care of those events here.
    // Make sure to stop the preview before resizing or reformatting it.

    if (mHolder.getSurface() == null){
        // preview surface does not exist
        return;
    }

    // stop preview before making changes
    try {
        mCamera.stopPreview();
    } catch (Exception e){
        // ignore: tried to stop a non-existent preview
    }

    // set preview size and make any resize, rotate or
    // reformatting changes here
    // set Camera parameters

    // start preview with new settings
    try {
        mCamera.setPreviewDisplay(mHolder);
        mCamera.startPreview();

    } catch (Exception e){
        Log.d(TAG, "Error starting camera preview: " + e.getMessage());
    }
    }
public void startPreview(){
    try{
        mCamera.startPreview();
    }catch (Exception e) {
    }
        } 
        private Size getOptimalSize() {
    Camera.Size result = null;
    final Camera.Parameters parameters = mCamera.getParameters();
    Log.i(CameraPreview.class.getSimpleName(), "window width: " + getWidth() + ", height: " + getHeight());
    for (final Camera.Size size : parameters.getSupportedPreviewSizes()) {
        if (size.width <= getWidth() * PREVIEW_SIZE_FACTOR && size.height <= getHeight() * PREVIEW_SIZE_FACTOR) {
            if (result == null) {
                result = size;
            } else {
                final int resultArea = result.width * result.height;
                final int newArea = size.width * size.height;

                if (newArea > resultArea) {
                    result = size;
                }
            }
        }
    }
    if (result == null) {
        result = parameters.getSupportedPreviewSizes().get(0);
    }
    Log.i(CameraPreview.class.getSimpleName(), "Using PreviewSize: " + result.width + " x " + result.height);
    return result;
}
}