Android(安卓)DataBinding的使用

DataBinding函数库的引入方式：

android {    ......    dataBinding{        enabled = true    }}

DataBinding的布局文件

以layout为根布局标签，包含data和view两个标签
data标签用来实现数据绑定
view标签就是布局

<?xml version="1.0" encoding="utf-8"?>

注：
bookitem：属性变量，类型为BookItem的Java类
@{bookitem.mName}：将控件的值和bookitem的成员变量联系在一起

数据对象

/** * @author Administrator */public class BookItem implements Parcelable {    public final  String mName;    public final String mLastTime;    public final String mTitle;    public final String mPath;    public BookItem(String mName, String mLastTime, String mTitle, String mPath) {        this.mName = mName;        this.mLastTime = mLastTime;        this.mTitle = mTitle;        this.mPath = mPath;    }    @Override    public int describeContents() {        return 0;    }    @Override    public void writeToParcel(Parcel dest, int flags) {        dest.writeString(this.mName);        dest.writeString(this.mLastTime);        dest.writeString(this.mTitle);        dest.writeString(this.mPath);    }    protected BookItem(Parcel in) {        this.mName = in.readString();        this.mLastTime = in.readString();        this.mTitle = in.readString();        this.mPath = in.readString();    }    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {        @Override        public BookItem createFromParcel(Parcel source) {            return new BookItem(source);        }        @Override        public BookItem[] newArray(int size) {            return new BookItem[size];        }    };}

数据绑定

 @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        MainActivityBinding binding = DataBindingUtil.setContentView(this, R.layout.main_activity);        BookItem book = new BookItem("你好", "2018-7-24", "Test", "../../../img");        binding.setBookitem(book);    }

事件绑定

xml中的绑定代码：

事件处理类：

    public void onClickName(View view) {        Toast.makeText(view.getContext(), book.mName, Toast.LENGTH_SHORT).show();    }    public void onClickTitle(View view) {        Toast.makeText(view.getContext(), book.mTitle, Toast.LENGTH_SHORT).show();    }

注意
需要添加

binding.setClick(this);

完整的Activity:

public class MainActivity extends AppCompatActivity {    BookItem book = null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        MainActivityBinding binding = DataBindingUtil.setContentView(this, R.layout.main_activity);        book = new BookItem("你好", "2018-7-24", "Test", "../../../img");        binding.setBookitem(book);        binding.setClick(this);    }    public void onClickName(View view) {        Toast.makeText(view.getContext(), book.mName, Toast.LENGTH_SHORT).show();    }    public void onClickTitle(View view) {        Toast.makeText(view.getContext(), book.mTitle, Toast.LENGTH_SHORT).show();    }}

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DataBinding函数库的引入方式：

DataBinding的布局文件

数据对象

数据绑定

事件绑定

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