1、环境 build.gradle
dataBinding { enabled = true } 2、layout <?xml version="1.0" encoding="utf-8"?> <layout xmlns:android="http://schemas.android.com/apk/res/android"> <data> <variable name="user" type="com.example.User"/> </data> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@{user.firstName}"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@{user.lastName}"/> </LinearLayout> </layout> 3、data project public class User { public final String firstName; public final String lastName; public User(String firstName, String lastName) { this.firstName = firstName; this.lastName = lastName; } }4、binding data super.onCreate(savedInstanceState); MainActivityBinding binding = DataBindingUtil.setContentView(this, R.layout.main_activity);//自动生成 User user = new User("Test", "User"); binding.setUser(user);5、事件绑定 <?xml version="1.0" encoding="utf-8"?> <layout xmlns:android="http://schemas.android.com/apk/res/android"> <data> <variable name="handlers" type="com.example.Handlers"/> <variable name="user" type="com.example.User"/> </data> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@{user.firstName}" android:onClick="@{handlers::onClickFriend}"/> </LinearLayout> </layout>public class MyHandlers { public void onClickFriend(View view) { ... } }