Android - Get text from one textView and set to another with Android Data Binding

Question

How can I set text from one textView to another? If I try like this:

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="SomeText" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@{textView1.getText()}" />

I`m getting error:

            Found data binding errors.
        ****/ data binding error ****msg:Identifiers must have user defined types from the XML file. textView1 is missing it
        loc:51:32 - 51:41
        ****\ data binding error ****

I tried many options but it didn’t work out. Thanks in advance for help!

Answer 1

for me this works perfectly fine

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

        <TextView
                android:id="@+id/textView1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="something" />

        <TextView
                android:id="@+id/textView2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@{textView1.text}" />

    </LinearLayout>
</layout>


class SimpleFragment : Fragment() {

    companion object {
        fun newInstance() = SimpleFragment()
    }

    private lateinit var binding: SimpleFragmentBinding

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        String
        binding = SimpleFragmentBinding.inflate(inflater)
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        textView1.text = "something else"
    }
}