Android活動Autorefresh/

Question

我對此很新，很抱歉，如果我的問題可能是微不足道的，我確定這是基本的東西，但我真的找不到解決方案。

我想在活動活動中實現autorefresh。我有一個在後臺運行的BT服務，需要通過mHandler確認一些接收到的數據。如果它收到預期的結果，我想改變一個textview的字符串，現在我正在使用一個額外的按鈕，但它是最醜陋的方式。 所以我需要一個循環內的活動，但我應該使用什麼？哪個動作監聽器？

Answer 1

也許你可以嘗試一個線程內循環

boolean update = false; // control the state to update textview 
    new Thread(new Runnable(){ 
     void run(){ 
      while(true){ 
       if(!update){ 
        ... 
        textview.setText("something."); 
        ... 
        update = true; 
       } 
      } 
     } 
    }.start(); 

Answer 2

確定你所能做的就是，你可以創建你的活動廣播reciever。在你寫的代碼中創建。修復它實際上我在家，所以你需要修復它我給你的想法。

BroadcastReciever broadcast_obj = new BroadcastReciever (
         @overrieded 
         onRecieve(Intent intent) { 
           String action = intent.getAction(); 
           if(action == "my_bt_action") { 
           //UPDATE YOUR TEXTVIEW AND DO WHATEVER WORK YOU WANT. 
           } 
          }); 


Now you need to register your broadcast for that just put these line in your oncreate after creating Broadcast reciever which we have just done. 

registerREciever(broadcast_obj, new IntentFilter("my_bt_action"); 

now you need to send your broadcast when your service will perform your calculation or your task for that it is simple. 

Intent intent = new Intent (getApplictionContext,"my_bt_action"); 
sendBroadcast(intent); 

from above code you can easily communicate between your activity and service. 

hope it will work.