Android開發教程：屏蔽，捕獲Home鍵

在Level5以上(包含)中，Activity類中的方法：public void onAttachedToWindow ()就能對Home鍵進行捕獲。具體代碼如下：

MainActivity.java

package com.lingdududu.test;  
 
import Android.app.Activity;  
import android.os.Bundle;  
import android.view.KeyEvent;  
import android.view.WindowManager;  
import android.widget.Toast;  
 
public class MainActivity extends Activity {  
    /** Called when the activity is first created. */ 
    private boolean catchHomeKey = false;  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
    }  
      
    @Override 
    public void onAttachedToWindow() {  
        // TODO Auto-generated method stub  
        if (!catchHomeKey) {  
            this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);  
        }  
        super.onAttachedToWindow();  
    }  
 
    @Override 
    public boolean onKeyDown(int keyCode, KeyEvent event) {  
        // TODO Auto-generated method stub  
        if (keyCode == KeyEvent.KEYCODE_HOME) {  
            Toast.makeText(MainActivity.this, "你點擊了HOME鍵", Toast.LENGTH_LONG).show();  
        }  
        return super.onKeyDown(keyCode, event);  
    }  
} 

當我們點擊Home鍵的時候，程序並沒有回到主界面，而是停留在當前的頁面，並且能捕獲到Home鍵，調用Toast顯示信息。

效果圖：

650) this.width=650;">