Android -- Home按键

游戏中常常需要监听android HOME键，当HOME键下压时，往往需要做一些状态保存，音效停止等操作，那么如何做，才能监听到HOME键呢？我们知道HOME是系统键，app中无法通过onKey这些函数来处理。要妥善的处理HOME键，首先需要看看HOME键下压时，系统做了些什么。

• HOME键之来龙去脉

• app中对于HOME键广播事件的接收

首先，自定义一个BroadcastReceiver：

class HomeKeyEventBroadCastReceiver extends BroadcastReceiver {  

    static final String SYSTEM_REASON = "reason";
    static final String SYSTEM_HOME_KEY = "homekey";//home key
    static final String SYSTEM_RECENT_APPS = "recentapps";//long home key  

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
            String reason = intent.getStringExtra(SYSTEM_REASON);
            if (reason != null) {
                if (reason.equals(SYSTEM_HOME_KEY)) {
                    // home key处理点  

                } else if (reason.equals(SYSTEM_RECENT_APPS)) {
                    // long home key处理点
                }
            }
        }
    }
}

其次，生成且注册之

receiver = new HomeKeyEventBroadCastReceiver();
registerReceiver(receiver, new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));

这样，我们就可以在app中进行HOME键的处理了！

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参考：http://blog.csdn.net/imyfriend/article/details/8293399