Android(安卓)Button

main.xml文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><TextView      android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="@string/hello"    />    <Button    android:id="@+id/btn1"    android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="点我1"    />    <Button    android:id="@+id/btn2"    android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="点我2"    /></LinearLayout>

strings.xml文件

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="hello">按钮的设置!</string>    <string name="app_name">ButtonDemo</string></resources>

MainActivity.java文件

package com.xuefei.button.activity;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class MainActivity extends Activity {    /** Called when the activity is first created. */ private Button btn1=null; private Button btn2=null; @Override public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.main);  btn1=(Button)findViewById(R.id.btn1);  btn2=(Button)findViewById(R.id.btn2);  btn1.setOnClickListener(listener);  btn2.setOnClickListener(listener); }//    @Override//    public void onCreate(Bundle savedInstanceState) {//        super.onCreate(savedInstanceState);//        setContentView(R.layout.main);//        btn1=(Button)findViewById(R.id.btn1);//        btn2=(Button)findViewById(R.id.btn2);//        btn1.setOnClickListener(new OnClickListener()//        { //   @Override//   public void onClick(View v) {//    // TODO Auto-generated method stub//    Toast.makeText(MainActivity.this, "你点击了按钮1。",Toast.LENGTH_SHORT ).show(); //    //   }//        });//        btn2.setOnClickListener(new OnClickListener()//        { //   @Override//   public void onClick(View v) {//    // TODO Auto-generated method stub//    Toast.makeText(MainActivity.this, "你点击了按钮2。",Toast.LENGTH_SHORT ).show(); //    //   }//        });// //class ButtonClick implements OnClickListener//{// public void onClick(View v)// {//  System.out.println("你点击了按钮！");// }//}//内部匿名类  private OnClickListener listener=new OnClickListener()  {   @Override   public void onClick(View v)   {    Button btn=(Button)v;    switch (btn.getId())    {    case R.id.btn1:     Toast.makeText(MainActivity.this, "你点击了按钮1。",Toast.LENGTH_SHORT ).show();      break;    case R.id.btn2:     Toast.makeText(MainActivity.this, "你点击了按钮2。",Toast.LENGTH_SHORT ).show();      break;   }   }  };}

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