1 package fry;
 2 
 3 import com.example.buttonDemo1.R;
 4 
 5 import android.app.Activity;
 6 import android.os.Bundle;
 7 import android.view.MotionEvent;
 8 import android.view.View;
 9 import android.view.View.OnClickListener;
10 import android.view.View.OnFocusChangeListener;
11 import android.view.View.OnTouchListener;
12 import android.widget.Button;
13 
14 public class Activity01 extends Activity implements OnClickListener,OnTouchListener,OnFocusChangeListener {
15     private Button btn_one;
16     private Button btn_two;
17     int value=1;
18     
19 
20     @Override
21     protected void onCreate(Bundle savedInstanceState) {
22         // TODO Auto-generated method stub
23         super.onCreate(savedInstanceState);
24         setContentView(R.layout.activity01);
25         btn_one = (Button) findViewById(R.id.btn_one);
26         btn_two = (Button) findViewById(R.id.btn_two);
27         btn_one.setOnClickListener(this);
28         btn_two.setOnClickListener(this);//触摸监听器
29         btn_two.setOnTouchListener(this);
30         btn_two.setOnFocusChangeListener(this);
31     }
32 
33     @Override
34     public void onClick(View v) {
35         // TODO Auto-generated method stub
36         Button btn = (Button) v;
37         int width = getWindow().getWindowManager().getDefaultDisplay()
38                 .getWidth();
39         /*
40          * value等于1表示扩大
41          * 等于-1表示缩小
42          */
43         if (btn.getWidth() < 100&&value==-1) {
44             value=1;
45         } else if (btn.getWidth() >= width&& value==1) {
46             value=-1;
47         }
48         btn.setWidth(btn.getWidth()+(int)(btn.getWidth()*0.1*value));
49         btn.setHeight(btn.getHeight()+(int)(btn.getHeight()*0.1*value));
50 
51     }
52 
53     @Override
54     public boolean onTouch(View v, MotionEvent event) {
55         // TODO Auto-generated method stub
56         int action=event.getAction();//事件类型
57         if(action==MotionEvent.ACTION_DOWN){//按下
58             btn_two.setBackgroundResource(R.drawable.button2);
59         }else if(action==MotionEvent.ACTION_UP){//松开
60             btn_two.setBackgroundResource(R.drawable.button1);
61         }
62         //如果点击事件被处理，就传回true，否则false
63         //也就是如果传true，事件被处理，onClick就不处理这个点击事件了
64         return false;
65     }
66 
67     @Override
68     public void onFocusChange(View v, boolean hasFocus) {
69         // TODO Auto-generated method stub
70         if(hasFocus){//获得焦点
71             btn_two.setBackgroundResource(R.drawable.button2);
72         }
73         else if(!hasFocus){//失去焦点
74             btn_two.setBackgroundResource(R.drawable.button1);
75         }
76     }
77 }

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6     
 7     <Button 
 8         android:id="@+id/btn_one"
 9         android:layout_width="wrap_content"
10         android:layout_height="wrap_content"
11         android:text="按钮一"
12         ></Button>
13     
14     <Button 
15         android:id="@+id/btn_two"
16         android:layout_width="wrap_content"
17         android:layout_height="wrap_content"
18         android:background="@drawable/button1"
19         ></Button>
20 
21 </LinearLayout>