求解答data binding框架中的BindingAdapter使用问题

Question

布局代码：

<?xml version="1.0" encoding="utf-8"?>
<layout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   tools:context="com.example.dell.mvvmdemo.MainActivity">

   <data>
       <variable
           name="user"
           type="com.example.dell.mvvmdemo.User"/>
   </data>

   <LinearLayout
       android:id="@+id/activity_main"
       android:layout_width="match_parent"
       android:layout_height="match_parent">

       <TextView
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:onClick="@{user.onClickName}"
           android:text="@{user.name}"
           android:textSize="20sp"
           app:newName ="@{user.newName}"
           />
   </LinearLayout>
</layout>

javaBean代码：

public class User {
   public ObservableField<String> name = new ObservableField<>();

   public ObservableField<String> newName = new ObservableField<>();

   public void onClickName(View view) {
       Log.i("User", name.get());
   }

   @BindingAdapter({"newName"})
   public static void setNewName(TextView tv, ObservableField<String> oName) {
       tv.setText(oName.get());
   }
}

数据绑定：

public class MainActivity extends AppCompatActivity {

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_main);
       
       ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
       final User user = new User();
       user.name.set("zhangsan");
       binding.setUser(user);

       new Thread(new Runnable() {
           @Override
           public void run() {
               SystemClock.sleep(2000);
               user.name.set("lisi");
               user.newName.set("wangwu");
           }
       }).start();
   }
}

求问为什么会报错：

Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> java.lang.RuntimeException: Found data binding errors.
****/ data binding error ****msg:Cannot find the setter for attribute 'app:newName' with parameter type java.lang.String on android.widget.TextView.
file:F:\Android\MVVMDemo\app\src\main\res\layout\activity_main.xml
loc:24:28 - 24:39
****\ data binding error ****

Answer 1

类型错误 @BindingAdapter({"newName"})   public static void setNewName(TextView tv,String oName) {       tv.setText(oName);   }