1.註冊廣播

        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);//home鍵
        //filter.addAction(Intent.ACTION_USER_PRESENT);//使用者解鎖廣播
        filter.addAction(Intent.ACTION_SCREEN_OFF);//滅屏廣播，亮屏為on
        registerReceiver(mReceiver, filter);

2.接受廣播

    private static final String SYSTEM_DIALOG_REASON_KEY = "reason";
    private static final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";
    BroadcastReceiver mReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context arg0, Intent intent) {
            String action = intent.getAction();
            if
 
(Util.EXIT_ACTION.equals(action)){
                mTabHost.setCurrentTab(0);
                mRadio_mylock.setChecked(true);
            }else if(Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action)){
                String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
                if (SYSTEM_DIALOG_REASON_HOME_KEY.equals(reason)) {
                    // 短按Home鍵
 

                }
            }else if(Intent.ACTION_SCREEN_OFF.equals(action)){  
                //滅屏    
            }

        }
    };