onKeyDowm和onKeyUp

 1 import android.app.Activity;
 2 import android.content.Context;
 3 import android.os.Bundle;
 4 import android.view.KeyEvent;
 5 import android.view.Menu;
 6 import android.view.MenuItem;
 7 import android.widget.Button;
 8 
 9 public class MainActivity extends Activity {
10 
11     MyButton myButton;
12 
13     @Override
14     protected void onCreate(Bundle savedInstanceState) {
15         super.onCreate(savedInstanceState);
16 
17         myButton = new MyButton(this);
18         myButton.setText("全屏按钮");
19         myButton.setTextSize(30);
20         setContentView(myButton);
21         // setContentView(R.layout.activity_main);
22     }
23 
24     class MyButton extends Button {// 自定义的Button
25 
26         public MyButton(Context context) {
27             super(context);
28             // TODO Auto-generated constructor stub
29         }
30 
31         @Override
32         public boolean onKeyDown(int keyCode, KeyEvent event) {
33             // TODO Auto-generated method stub
34             System.out.println("Button_onKeyDown" + keyCode+super.onKeyDown(keyCode, event));
35             return false;//false表示按下键时，先调用Button中的onKeyDown方法在调用activity中的onKeyDown方法                                                                                                                       
36             //return super.onKeyDown(keyCode, event);//此处也是return false;
37         }
38 
39         @Override
40         public boolean onKeyUp(int keyCode, KeyEvent event) {
41             // TODO Auto-generated method stub
42             System.out.println("Button_onKeyUp" + keyCode+super.onKeyUp(keyCode, event));
43             return false;
44             //return super.onKeyUp(keyCode, event);
45         }
46 
47     }
48     
49     @Override
50     public boolean onKeyDown(int keyCode, KeyEvent event) {
51         // TODO Auto-generated method stub
52         System.out.println("Activity_onKeyDown" + keyCode);
53         return false;
54         //return super.onKeyDown(keyCode, event);
55     }
56     @Override
57     public boolean onKeyUp(int keyCode, KeyEvent event) {
58         // TODO Auto-generated method stub
59         System.out.println("Activity_onKeyUp"+ keyCode);
60         return false;
61         //return super.onKeyUp(keyCode, event);
62     }
63 
64 }