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.xmlloc: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);
   }