android MVVM DataBinding

android 官方关于 DataBinding 的说明

本文基于Android Studio

1.首先需要在你的项目中增加android databinding 插件和依赖

gradle app 文件中 apply plugin: 'com.android.databinding'

gradle project 文件中 classpath "com.android.databinding:dataBinder:1.0-rc0"

2.编写模型类必须继承自BaseObservable，然后再getter方法中添加@Bindable 注解

public class MainModel extends BaseObservable {

private String title;
private String content;

@Bindable
public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

@Bindable
public String getContent() {
return content;
}

public void setContent(String content) {
this.content = content;
}
}

3.编写布局文件

xmlns:tools="http://schemas.android.com/tools">

name="main"
type="com.lib.androiddatabindingexample.MainModel"/>

android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity">

android:id="@+id/main_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textStyle="bold"
android:text="@{main.title}" />

android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_margin="10dp"
android:layout_below="@id/main_title"
android:layout_height="wrap_content"
android:text="@{main.content}" />

4.在Activity中配置

public class MainActivity extends Activity {

ActivityMainBinding activityMainBinding;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activityMainBinding = DataBindingUtil.setContentView(this, R.layout.activity_main);

MainModel mainModel = new MainModel();
mainModel.setTitle("明天会下雨吗？");
mainModel.setContent("明天不会下雨的,明天不会下雨的,明天不会下雨的,明天不会下雨的,明天不会下雨的");
activityMainBinding.setMain(mainModel);
}

}

代码：https://github.com/djgzhiyong/AndroidDataBindingExample.git

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