Butterknife: Can be used with ViewStub ?

[sebastianperdomo]

Hi, it can be used with viewstub? I have my entire application with this library, and i need use a viewstub in many fragments...great library by the way...

greetings.

[JakeWharton]

As in, you want to inject a ViewStub? Or you want to inject the views inside of the ViewStub?

[sebastianperdomo]

yes, I need to access the controls that are inside the viewstub, but throws me an error when I want to use any of the controls inside the viewstub because the @InjectView cannot find them.

[JakeWharton]

Well they aren't in the layout so it correct throws an error. Create a nested class which holds the views inside the stub and then call inject on an instance of that class using the viewstub as the root.

[sebastianperdomo]

ok, you could show me how? I made this code example of what I have in my application, obviously is not the original code of my app, because the original has 20 EditText controls.

public class EstadoActual extends Fragment {

    // this controls work perfect
    @InjectView(R.id.txtWork1) AutoCompleteTextView txtWork1;
    @InjectView(R.id.txtWork2) EditText txtWork2;

    // this controls are inside the viewstub, don't work
    @InjectView(R.id.txtDontWork1) EditText txtDontWork1;
    @InjectView(R.id.txtDontWork1) EditText txtDontWork2;

    public static EstadoActual newInstance() {
        EstadoActual fragment = new EstadoActual();
        return fragment;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.festadoactual, container, false);
        ButterKnife.inject(this, rootView);
        Fill();
        return rootView;
    }

    private void Fill(){
        txtWork1.setText("Hello 1");
        txtWork2.setText("Hello 2");

        txtDontWork1.setText("Don't Work 1"); // when i use @Optional in the two edittext, the "inject" works, but throw an error Here
        txtDontWork2.setText("Don't Work 2");
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        ButterKnife.reset(this);
    }
}

[sebastianperdomo]

Any help ?

[manijshrestha]

@seba123neo, create a class that has txtDontWork1, txtDontWork2. In the main class have reference to your view stub. When you inflate your viewstub pass that resulting one to that another class. For example:

public class EstadoActual extends Fragment { 

    // this controls work perfect 
    @InjectView(R.id.txtWork1) AutoCompleteTextView txtWork1;
    @InjectView(R.id.txtWork2) EditText txtWork2;

    // this controls are inside the viewstub,
    @InjectView(R.id.viewstub) ViewStub viewStub;

      MyDynamicView  myDynamicView;
.. .. ...
    // class (inner in this example) that has stuff from your stub
    public class MyDynamicView {
      @InjectView(R.id.txtDontWork1) EditText txtDontWork1;
      @InjectView(R.id.txtDontWork1) EditText txtDontWork2;
       public MyDynamicView(View view) {
         Butterknife.inject(this, view);
       }
    }

   @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.festadoactual, container, false);
        ButterKnife.inject(this, rootView);
      ... ..
        View viewFromStub = viewStub.inflate();  
        myDynamicView = new MyDynamicView(viewFromStub); // this is the main point where you configure your view
        Fill(); 
        return rootView;
    } 

   private void Fill(){ 
        txtWork1.setText("Hello 1");
       txtWork2.setText("Hello 2");

        myDynamicView.txtDontWork1.setText("Don't Work 1"); // This should work for you now
        myDynamicView.txtDontWork2.setText("Don't Work 2");
    } 

[JakeWharton]

Yep yep. What @manijshrestha said!