如何處理菜單鍵(MENU)

這是一個檢測菜單鍵(MENU)的示例代碼.

重寫onKeyDown()和onKeyDown()方法, 比較keyCode是不是需要處理的鍵.
- 如果是, 處理完成後返回true, 表示已經處理了.
- 如果不是, 傳遞給super處理.
(其他鍵也可以同樣方法處理)

package com.AndroidMenuKey;

import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.Toast;

public class AndroidMenuKey extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

 @Override
 public boolean onKeyDown(int keyCode, KeyEvent event) {
  // TODO Auto-generated method stub
  if(keyCode == KeyEvent.KEYCODE_MENU){
   Toast.makeText(this, "MENU Key Down", Toast.LENGTH_LONG).show();
   return true;
  }else{
   return super.onKeyDown(keyCode, event);
  }
  
 }

 @Override
 public boolean onKeyUp(int keyCode, KeyEvent event) {
  // TODO Auto-generated method stub
  if(keyCode == KeyEvent.KEYCODE_MENU){
   Toast.makeText(this, "MENU Key Up", Toast.LENGTH_LONG).show();
   return true;
  }else{
   return super.onKeyUp(keyCode, event);
  }
  
 }
    
    
}