custom view with butterknife exmaple

photoQuestionView.java

public class PhotoQuestionAnswer extends FrameLayout {

    @InjectView(R.id.photo) PicassoImageView photoIv;

    public PhotoQuestionAnswer(Context context) {
        this(context, null);
    }

    public PhotoQuestionAnswer(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public PhotoQuestionAnswer(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init() {
        LayoutInflater.from(getContext()).inflate(R.layout.view_photo_question_answer, this, true);
        ButterKnife.inject(this);
    }

    public void setImageBitmap(Bitmap bm) {
        photoIv.setImageBitmap(bm);
    }
}