布局代碼：<?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代碼：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()); ? ?}}數(shù)據(jù)綁定：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(); ? ?}}求問為什么會報錯：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 ****