IrApp IrApp - 1 month ago 22
Android Question

Android data binding not working

I am trying to do a simple test example with

Android Data Binding
. I only want to show in my fragment the text
"test"
in the
EditText
named
"title"
, but this text is not shown. Here is my code:

TestVM.java

public class TestVM extends BaseObservable {

public TestVM() {}

@Bindable
public String getText() {
return "test";
}
}


fr_login.xml

<layout xmlns:android="http://schemas.android.com/apk/res/android">

<data>
<variable
name="test"
type="de.theappguys.templateandroid.viewmodel.TestVM"/>
</data>

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/transparent"
>

<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginTop="20dp"
android:text="@{test.text}"
android:textSize="22sp"
android:textStyle="bold"
android:textColor="@android:color/black"
/>

</RelativeLayout>
</layout>


FrLogin.java

@EFragment
public class FrLogin extends Fragment {

...

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
FrLoginBinding binding = DataBindingUtil.inflate(inflater, R.layout.fr_login, container, false);

return binding.getRoot();
}

...


build.gradle

android {

.....

dataBinding {
enabled = true
}

....
}

Answer

you need to set value to your binding

FrLoginBinding binding = DataBindingUtil.inflate(inflater, R.layout.fr_login, container, false);
binding.setTest(new TestVM());

Problem with your code is that there is no connection between your model and Fragment.