DataBinding

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
   <data>
       <variable name="user" type="com.example.cunli.databing.web.User"/>

   </data>
   <LinearLayout
       android:orientation="vertical"
       android:layout_width="match_parent"
       android:layout_height="match_parent">
       <EditText android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="@={user.email}"
           android:id="@+id/email"
           />
       <TextView android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:text="@={user.password}"
           android:id="@+id/password"
           android:layout_marginTop="10dp"/>

       <Button
           android:layout_marginTop="30dp"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:id="@+id/btn"
           android:onClick="hello"
           android:text="@string/app_name"/>



   </LinearLayout>
</layout>



package com.example.cunli.databing.web;

import android.databinding.BaseObservable;
import android.databinding.Bindable;

import com.example.cunli.databing.BR;


/**
* Created by winder on 2016/7/6.
*/
public class User extends BaseObservable {
   public  String email;
   public  String password;

   public User() {
   }

   public User(String email, String password) {
       this.email = email;
       this.password = password;
   }

   @Bindable
   public String getPassword() {
       return password;
   }

   public void setPassword(String password) {
       this.password = password;
       notifyPropertyChanged(BR.password);
   }

   @Bindable
   public String getEmail() {
       return email;
   }

   public void setEmail(String email) {
       this.email = email;
       notifyPropertyChanged(BR.email);
   }



}



package com.example.cunli.databing.activity;

import android.databinding.DataBindingUtil;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Toast;


import com.example.cunli.databing.R;
import com.example.cunli.databing.databinding.ActivityMainBinding;
import com.example.cunli.databing.server.TeachLogServer;
import com.example.cunli.databing.web.CheckTeachLog;
import com.example.cunli.databing.web.TeachLog;
import com.example.cunli.databing.web.User;

public class MainActivity extends AppCompatActivity {

   private TeachLogServer teachLogServer = new TeachLogServer();
   User user;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);

       ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);

       user = new User("haliluya", "thankyoulord");
       binding.setUser(user);

   }

   public void hello(View view){


       Log.e("password","------getEmail------- "+user.getEmail());

       Toast.makeText(this,user.getEmail()+"	"+user.getPassword(), Toast.LENGTH_SHORT).show();
   }

 
}