需求是統(tǒng)計(jì)app使用時(shí)長(zhǎng)，要求在按home鍵的時(shí)候也算一次完成的使用記錄。剛開(kāi)始打算采用監(jiān)聽(tīng)home鍵點(diǎn)擊，尋求的方法是監(jiān)聽(tīng)系統(tǒng)廣播。

   class InnerRecevier extends BroadcastReceiver {
      final String SYSTEM_DIALOG_REASON_KEY = "reason";
      final String SYSTEM_DIALOG_REASON_RECENT_APPS = "recentapps";
      final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";

      @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_DIALOG_REASON_KEY);
            if (reason != null) {
               if (mListener != null){
                  if (reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)){
                     // 短按home鍵
                     mListener.onHomePressed();
                  }else if (reason.equals(SYSTEM_DIALOG_REASON_RECENT_APPS)){
                     // 長(zhǎng)按home鍵
                     mListener.onHomeLongPressed();
                  }
               }
            }
         }
      }

可以實(shí)現(xiàn)監(jiān)聽(tīng)home鍵被點(diǎn)擊，但有一個(gè)弊端就是點(diǎn)擊home鍵app切換到后臺(tái)后，在使用別的app點(diǎn)擊home鍵 自己的app還是會(huì)收到這個(gè)廣播，因?yàn)檫@是系統(tǒng)級(jí)的廣播，這里處理邏輯就比較麻煩，要寫(xiě)一些判斷等，還有另外一種可以直接監(jiān)聽(tīng)app切換前后臺(tái)，采用下面這種方式能簡(jiǎn)單完美解決我的需求。

    private int activityAount = 0;//當(dāng)前Acitity個(gè)數(shù)

    private boolean inItOnlineTime= true;//是否重新計(jì)時(shí)app在線時(shí)間
    /**
     * Activity 生命周期監(jiān)聽(tīng)，用于監(jiān)控app前后臺(tái)狀態(tài)切換
     */
    ActivityLifecycleCallbacks activityLifecycleCallbacks = new ActivityLifecycleCallbacks() {
        @Override
        public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
        }

        @Override
        public void onActivityStarted(Activity activity) {
            activityAount++;
            if(inItOnlineTime){
               //app切換到前臺(tái)了，重新計(jì)時(shí)
                createAppOnlineTime();
                inItOnlineTime = false;
            }
        }

        @Override
        public void onActivityResumed(Activity activity) {
        }
        @Override
        public void onActivityPaused(Activity activity) {
        }

        @Override
        public void onActivityStopped(Activity activity) {
            activityAount--;
            if (activityAount == 0) {
                //app切換到后臺(tái)了，提交時(shí)間數(shù)據(jù)
                postAppOnlineTime();
                inItOnlineTime = true;
            }
        }

        @Override
        public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
        }
        @Override
        public void onActivityDestroyed(Activity activity) {
        }
    };
  	//注冊(cè)這個(gè)監(jiān)聽(tīng)
     registerActivityLifecycleCallbacks(activityLifecycleCallbacks);

把上面代碼寫(xiě)在Application中，在Application的onCreate的方法中注冊(cè)監(jiān)聽(tīng)，在使用app的時(shí)候無(wú)論在任何頁(yè)面當(dāng)點(diǎn)擊home鍵的時(shí)候都會(huì)觸發(fā)監(jiān)聽(tīng)，點(diǎn)擊返回鍵退出app 和menu鍵也會(huì)觸發(fā)app切換到后臺(tái)的監(jiān)聽(tīng)。文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-509294.html

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