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监听Android 的home键[转]

2024-07-13 10:28:41   222人阅读

转自：here

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。

二、app中对于HOME键广播事件的接收

      首先，自定义一个BroadcastReceiver：

 1     class HomeKeyEventBroadCastReceiver extends BroadcastReceiver { 2  3         static final String SYSTEM_REASON = "reason"; 4         static final String SYSTEM_HOME_KEY = "homekey";//home key 5         static final String SYSTEM_RECENT_APPS = "recentapps";//long home key 6          7         @Override 8         public void onReceive(Context context, Intent intent) { 9             String action = intent.getAction();10             if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {11                 String reason = intent.getStringExtra(SYSTEM_REASON);12                 if (reason != null) {13                     if (reason.equals(SYSTEM_HOME_KEY)) {14                         // home key处理点15                         16                     } else if (reason.equals(SYSTEM_RECENT_APPS)) {17                         // long home key处理点18                     }19                 }20             }21         }22     }

其次，生成且注册之

1         receiver = new HomeKeyEventBroadCastReceiver();2         registerReceiver(receiver, new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));


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