public class SelectImageActivity extends ActionBarActivity implements ImageInputHelper.ImageActionListener {

    private ImageInputHelper imageInputHelper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_select_image);

        imageInputHelper = new ImageInputHelper(this);
        imageInputHelper.setImageActionListener(this);

        findViewById(R.id.select_photo_from_gallery).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                imageInputHelper.selectImageFromGallery();
            }
        });

        findViewById(R.id.take_picture_with_camera).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                imageInputHelper.takePhotoWithCamera();
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        imageInputHelper.onActivityResult(requestCode, resultCode, data);
    }

    @Override
    public void onImageSelectedFromGallery(Uri uri, File imageFile) {
        // cropping the selected image. crop intent will have aspect ratio 16/9 and result image
        // will have size 800x450
        imageInputHelper.requestCropImage(uri, 800, 450, 16, 9);
    }

    @Override
    public void onImageTakenFromCamera(Uri uri, File imageFile) {
        // cropping the taken photo. crop intent will have aspect ratio 16/9 and result image
        // will have size 800x450
        imageInputHelper.requestCropImage(uri, 800, 450, 16, 9);
    }

    @Override
    public void onImageCropped(Uri uri, File imageFile) {
        try {
            // getting bitmap from uri
            Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);

            // showing bitmap in image view
            ((ImageView) findViewById(R.id.image)).setImageBitmap(bitmap);

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}