Android監聽組合鍵

package com.fuwei.action;

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

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

@Override
protected void onRestart() {
   // TODO Auto-generated method stub
   Toast.makeText(this, "Home", 1);
   super.onRestart();
}

public void onClickView() {
   TextView textView = (TextView) findViewById(R.id.linear);
   textView.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
     v.setBackgroundColor(0xFF00FF00);
    }
   });
}

// @Override
// public boolean onKeyDown(int keyCode, KeyEvent event) {
// // TODO Auto-generated method stub
// if(!event.isAltPressed()&&keyCode == KeyEvent.KEYCODE_A){
// Toast.makeText(Main.this, "ALT + A", 0).show();
// }
// return super.onKeyDown(keyCode, event);
// }

// @Override
// public boolean dispatchKeyEvent(KeyEvent event) {
// // TODO Auto-generated method stub
// //Alt Shift System 等鍵可以用is....判斷是否爲按下狀態
// if(event.isAltPressed()&&event.getKeyCode() == KeyEvent.KEYCODE_A){
// Toast.makeText(Main.this, "ALT + A", 0).show();
// }
// return super.dispatchKeyEvent(event);
// }

boolean aIsDown = false;
boolean qIsDown = false;

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
   // TODO Auto-generated method stub
   // 判斷普通按鍵
   int keyCode = event.getKeyCode();
   if (keyCode == KeyEvent.KEYCODE_A
     && event.getAction() == KeyEvent.ACTION_DOWN) {
    aIsDown = true;
   } else if (keyCode == KeyEvent.KEYCODE_Q
     && event.getAction() == KeyEvent.ACTION_DOWN) {
    qIsDown = true;
   }else if((keyCode == KeyEvent.KEYCODE_Q && !aIsDown)||(keyCode == KeyEvent.KEYCODE_A && !qIsDown)){
    aIsDown = false;
    qIsDown = false;
   }else if (aIsDown
     && qIsDown
     && (keyCode == KeyEvent.KEYCODE_Q || keyCode == KeyEvent.KEYCODE_A)
     && event.getAction() == KeyEvent.ACTION_UP) {
    Toast.makeText(Main.this, "Q + A", 0).show();
    aIsDown = false;
    qIsDown = false;
   }else{
    aIsDown = false;
    qIsDown = false;
   }
   return super.dispatchKeyEvent(event);
}
}

本文章在網上有很多，但是在監聽組合鍵時都存在一些嚴重的bug，以上是本人經過修改後的代碼