Android~DataBinding 使用，androidsdk 开发实例

public String getPwd() {

return pwd;

}

public void setPwd(String pwd) {

this.pwd = pwd;

notifyPropertyChanged(BR.pwd);

}

@Bindable

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

notifyPropertyChanged(BR.name);

}

@Bindable

public String getLoginTime() {

return loginTime;

}

public void setLoginTime(String loginTime) {

this.loginTime = loginTime;

notifyPropertyChanged(BR.loginTime);

}

}

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

<layout xmlns:android="http://schemas.android.com/apk/res/android"

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

<data>

<variable

name="user"

type="com.example.myapplication.UserInfo" />

<variable

name="Activity"

type="com.example.myapplication.MainActivity" />

</data>

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:id="@+id/container"

tools:context=".MainActivity"

android:orientation="vertical"

android:gravity="center_horizontal|top">

<EditText

android:id="@+id/name_et"

android:layout_width="200dp"

android:layout_height="wrap_content"

android:layout_marginTop="100dp"

android:singleLine="true"

android:text="@={user.name}"

android:hint="用户名"/>

<EditText

android:id="@+id/pwd_et"

android:layout_width="200dp"

android:layout_height="wrap_content"

android:singleLine="true"

android:text="@={user.pwd}"

android:inputType="numberPassword"

android:hint="密码"/

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<TextView

android:id="@+id/login_time_tv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@{user.loginTime}"/>

<Button

android:id="@+id/login_btn"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:onClick="@{Activity.userLogin}"

android:text="登录"/>

</LinearLayout>

</layout>

如何进行单向绑定？

1、UserInfo 继承自 BaseObservable

2、为 UserInfo 中需要绑定的 get 方法添加注解@Bindable，set 方法添加notifyPropertyChanged(BR.loginTime);

3、如要进行双向绑定，再单向绑定基础上添加等号，如android:text="@={user.pwd}"

Activity 中如何使用 DataBinding？

import android.databinding.DataBindingUtil;

import android.os.Bundle;

import android.support.v4.app.FragmentActivity;

import android.text.format.Time;

import android.util.Log;

import android.view.View;

import android.widget.Toast;

import com.example.myapplication.databinding.TestMainBinding;

public class MainActivity extends Activity {

final static String TAG = "Main";

private UserInfo user;

private TestMainBinding binding;

private Time mTime;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

//setContentView(R.layout.test_main);

mTime = new Time();

binding = DataBindingUtil.setContentView(MainActivity.this,R.layout.test_main);

user = new UserInfo("","");

binding.setUser(user);

binding.setActivity(this);