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键是一个系统的按钮,我们无法通过onKeyDown
进行拦截,它是拦截不到的,我们只能得到他在什么时候被按下了。就是通过广播接收者
public class HomeKeyEventBroadCastReceiver extends BroadcastReceiver { static final String SYSTEM_REASON = "reason"; static final String SYSTEM_HOME_KEY = "homekey"; static final String SYSTEM_RECENT_APPS = "recentapps"; @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 } } } } }- 在
Activity
中去注册这个广播接收者receiver = new HomeKeyEventBroadCastReceiver(); registerReceiver(receiver, new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
- 在
Activity
销毁的方法中去取消注册unRegisterReceiver(receiver);