Use of butterknife

Butterknife

Let's proceed from tediousfindViewById. The following is the usage method.

Activity

Class exampleactivity extends activity {@ injectview (R. id. title) textview title; @ injectview (R. id. subtitle) textview subtitle; @ injectview (R. id. footer) textview footer; @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); setcontentview (R. layout. simple_activity); butterknife. inject (this); // todo use "injected" views ...}}

Butterknife. Reset (this) is used when fragment is destroyed );

public class FancyFragment extends Fragment {  @InjectView(R.id.button1) Button button1;  @InjectView(R.id.button2) Button button2;  @Override View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    View view = inflater.inflate(R.layout.fancy_fragment, container, false);    ButterKnife.inject(this, view);    // TODO Use "injected" views...    return view;  }}

Adapter

Public class myadapter extends baseadapter {@ override

Public View getview (INT position, view, viewgroup parent) {viewholder holder; If (view! = NULL) {holder = (viewholder) view. gettag ();} else {view = Inflater. inflate (R. layout. whatever, parent, false); holder = new viewholder (View); view. settag (holder);} holder. name. settext ("John Doe"); // etc... return view;} static class viewholder {@ injectview (R. id. title) textview name; @ injectview (R. id. job_title) textview jobtitle; Public viewholder (view) {butterknife. inject (this, view );}}}

View lists

@ Injectviews ({R. Id. first_name, R. Id. middle_name, R. Id. last_name}) List <edittext> nameviews;

Click listener Injection

@OnClick(R.id.submit) public void submit() {   // TODO submit data to server... }

@OnClick(R.id.submit) public void sayHi(Button button) {   button.setText("Hello!"); }

You can also bind multiple control IDs.

@OnClick({ R.id.door1, R.id.door2, R.id.door3 })  public void pickDoor(DoorView door) {   if (door.hasPrizeBehind()) {        Toast.makeText(this, "You win!", LENGTH_SHORT).show();   } else {       Toast.makeText(this, "Try again", LENGTH_SHORT).show();   }  }
Injection reset destruction
 ButterKnife.reset(this);
By default@InjectViewAnd@OnClickWhen you find the control, it cannot be empty. Otherwise, an exception is thrown.
You can add@OptionalAllowed to be empty
 
@Optional @InjectView(R.id.might_not_be_there) TextView mightNotBeThere;    @Optional @OnClick(R.id.maybe_missing) void onMaybeMissingClicked() {    // TODO ...    }

 

Configuration of butterknife in Eclipse:

Click OK!