BUTTERKNIFE

Where to use butterknife

1)Drawables, String, Boolean, Integer, Color and Dimension resources.

2) static class ViewHolder extends RecyclerView.ViewHolder {

    @BindView(R.id.image_view)

    ImageView imageView;

    @BindView(R.id.TextView)

    TextView text_view;

    

    ViewHolder(View view) {

        super(view);

        ButterKnife.bind(this, view);

    }

}
Note the same with fragments public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState){
View view=inflater.inflate(R.layout.xxx,container,false);
ButterKnife.bind(this,view);
return view;
}

3) View lists

@BindViews({ R.id.button_flash, R.id.button_timer, R.id.button_hdr})

List<Button> camControls;

Now we have all the views in one list. Lets write VISIBILITY setter for simple show/hide behavior.

i)final ButterKnife.Setter<View, Integer> VISIBILITY = new ButterKnife.Setter<View,Integer>() {

    @Override

    public void set(@NonNull View view, Integer value, int index) {

        view.setVisibility(value);

    }

};

ii)Lambda Expressions

final ButterKnife.Setter<View, Integer> VISIBILITY 

          = (view, value, index) -> view.setVisibility(value);

ButterKnife.apply(camControls, VISIBILITY, View.GONE);

5)Listener Binding

• @OnCheckedChange
• @OnClick
• @OnLongClick
• @OnEditorAction
• @OnFocusChange
• @OnItemClick
• @OnItemLongClick
• @OnTouch
• @OnTextChanged