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Android Custom Camera Quality

I use the following options for my custom camera

mCamera = getCameraInstance();

params = mCamera.getParameters();
params.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
params.setSceneMode(Camera.Parameters.SCENE_MODE_AUTO);
params.setWhiteBalance(Camera.Parameters.WHITE_BALANCE_AUTO);
params.setExposureCompensation(0);
params.setPictureFormat(ImageFormat.JPEG);
params.setJpegQuality(100);
params.setRotation(90);

List<Size> sizes = params.getSupportedPictureSizes();
Camera.Size size = sizes.get(0);
params.setPictureSize(size.width, size.height);

mCamera.setParameters(params);

And after the picture is taken, the image quality is pretty poor. I use autofocus and flash.

This is my method for taking pictures.

mCamera.autoFocus(new Camera.AutoFocusCallback() {
    ShutterCallback shutterCallback = new ShutterCallback() {

        @Override
        public void onShutter() {
            AudioManager mgr = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
            mgr.playSoundEffect(AudioManager.FLAG_PLAY_SOUND);
        }
    };

    PictureCallback pictureCallback = new PictureCallback() {

        @Override
        public void onPictureTaken(byte[] data,
                Camera camera) {
            ...
        }
    };

    public void onAutoFocus(boolean success, Camera camera) {
        mCamera.takePicture(shutterCallback,
                null, null, pictureCallback);
    }
});

This is especially bad when the flash does not fire (I use the automatic flash) and the room I was in is well lit.

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1 answer

When you use getSupportedPictureSizes(), it does not necessarily return them in any order. He probably returns a terrible size in sizes.get(0). You must compare them to find the largest size if you want the best quality. Sort of:

List<Size> sizes = params.getSupportedPictureSizes();
Camera.Size size = sizes.get(0);
for(int i=0;i<sizes.size();i++)
{
    if(sizes.get(i).width > size.width)
        size = sizes.get(i);
}
params.setPictureSize(size.width, size.height);
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