Styjun

I just learn about databinding in android applications and i want to implementing EditText TextWatcher with @BindingAdapter, for my below code unfortunately i get this error:

Required DataBindingComponent is null in class ActivityLoginBindingImpl. A BindingAdapter in ir.instacheeta.application.views.login.viewModel.LoginViewModel.EditTextBindingAdapters is not static and requires an object to use, retrieved from the DataBindingComponent. If you don't use an inflation method taking a DataBindingComponent, use DataBindingUtil.setDefaultComponent or make all BindingAdapter methods static.

and i can't resolve that

binding = DataBindingUtil.setContentView(this, R.layout.activity_login);
binding.setViewModel(ViewModelProviders.of(this,
 new LoginViewModelFactory(this))
 .get(LoginViewModel.class));

My ViewModel class:

public class LoginViewModel extends ObservableViewModel 
 private static InstagramAccount instagramAccount;
 private LoginResultCallback loginResultCallback;

 public LoginViewModel(LoginResultCallback callback) 
 instagramAccount = new InstagramAccount();
 loginResultCallback = callback;
 

 public static class EditTextBindingAdapters 

 @BindingAdapter(value = "textChangedListener" , requireAll = true)
 public void bindTextWatcher(EditText editText, TextWatcher textWatcher) 
 editText.addTextChangedListener(textWatcher);
 
 

 @Bindable
 public static TextWatcher getUserPageTextWatcher() 
 return new TextWatcher() 
 @Override
 public void beforeTextChanged(CharSequence s, int start, int count, int after) 
 // Do nothing.
 

 @Override
 public void onTextChanged(CharSequence s, int start, int before, int count) 
 Log.e("==> ", s.toString());
 instagramAccount.setUserPage(s.toString());
 

 @Override
 public void afterTextChanged(Editable s) 
 // Do nothing.
 
 ;
 

 @Bindable
 public static TextWatcher getUserPagePassword() 
 return new TextWatcher() 
 @Override
 public void beforeTextChanged(CharSequence s, int start, int count, int after) 

 

 @Override
 public void onTextChanged(CharSequence s, int start, int before, int count) 
 Log.e("==> ", s.toString());
 instagramAccount.setUserPassword(s.toString());
 

 @Override
 public void afterTextChanged(Editable s) 
 
 ;
 

and my ObservableViewModel class is:

open class ObservableViewModel : ViewModel(), Observable 

 private val callbacks: PropertyChangeRegistry by lazy PropertyChangeRegistry() 

 override fun addOnPropertyChangedCallback(callback: Observable.OnPropertyChangedCallback) 
 callbacks.add(callback)
 

 override fun removeOnPropertyChangedCallback(callback: Observable.OnPropertyChangedCallback) 
 callbacks.remove(callback)
 

 fun notifyChange() 
 callbacks.notifyCallbacks(this, 0, null)
 

 fun notifyPropertyChanged(fieldId: Int) 
 callbacks.notifyCallbacks(this, fieldId, null)