Android如何在具有数据绑定的文本视图中使用字符串变量

<TextView
    android:id="@+id/myTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@{myString}" />

public class MainActivity extends AppCompatActivity {
    private String myString = "Hello World";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        binding.setMyString(myString);
    }
}