dataBinding的import导入

1>main_sub.xml

<?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">

    <data>
        <variable
            name="user"
            type="com.lxk.databindingtest.UserInfo" />
        <import type="com.lxk.databindingtest.StarUtils"/>
        <variable
            name="butt"
            type="com.lxk.databindingtest.ButtonClickListener" />
    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toTopOf="@+id/button"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            android:text="@{StarUtils.getStar(user.star)}"
            tools:text="一星" />

        <TextView
            android:id="@+id/textView"
            android:layout_width="46dp"
            android:layout_height="19dp"
            tools:text="姓名"
            android:text="@{user.name}"
            app:layout_constraintBottom_toTopOf="@+id/textView2"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="16dp"
            android:text="加分"
            android:onClick="@{butt.likeClick}"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>

2>main.xml导入main_sub.xml

<?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">

    <data>
        <variable
            name="userInfo"
            type="com.lxk.databindingtest.UserInfo" />
        <variable
            name="buttClick"
            type="com.lxk.databindingtest.ButtonClickListener" />
    </data>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">
        <include
            layout="@layout/main_sub"
            app:user="@{userInfo}"
            app:butt="@{buttClick}"
           />
    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>

3>MainActivity

public class MainActivity extends AppCompatActivity {
    ActivityMainBinding activityMainBinding;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        activityMainBinding= DataBindingUtil.setContentView(this,R.layout.activity_main);
        UserInfo userInfo=new UserInfo("于振锋",5);
        activityMainBinding.setUserInfo(userInfo);
        activityMainBinding.setButtClick(new ButtonClickListener(this));
    }
}

作者：北京小强户外
链接：https://www.jianshu.com/p/5aae2167078b
来源：简书
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