androidonKeydown

package wyf.ytl;                         
import android.app.Activity;               
import android.content.Context;           
import android.os.Bundle;                  
import android.util.Log;                   
import android.view.KeyEvent;               
import android.widget.Button;               
public class Sample_7_1 extends Activity {  
        public final String TAG = "Sample_7_1";   
        MyButton myButton;                        
    public void onCreate(Bundle savedInstanceState) 
    { 
        super.onCreate(savedInstanceState);  
        
        myButton = new MyButton(this);     
        myButton.setText("全屏按钮");        
        myButton.setTextSize(30);               
        setContentView(myButton);           
    }  
    public boolean onKeyDown(int keyCode, KeyEvent event) 
    { //重写的键盘按下监听  
        Log.d(TAG, "activity onKeyDown");
        return super.onKeyDown(keyCode, event);  
    }  
    class MyButton extends Button
    {            
        public MyButton(Context context) 
        {      
            super(context);  
        }  
        public boolean onKeyDown(int keyCode, KeyEvent event)
        {//重写的键盘按下监听  
            Log.d(TAG, "MyView onKeyDown");     
            //打印日志  
            return true;  //return false;
        }  
    }  
    }