Android：廣播接收器中的電話狀態

Question

我使用廣播接收器來捕獲電話狀態更改。 它在第一次（對於State_OffHook）狀態改變時正常工作，但在通話結束時不會作出反應。 這是我的代碼：

String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);      
      if (TelephonyManager.EXTRA_STATE_OFFHOOK.equals(state)) {working fine} 
       else if (TelephonyManager.EXTRA_STATE_IDLE.equals(state)) {doesn't react} 

Answer 1

當你有沒有打電話給你是IDLE狀態，當你得到一個呼叫它去OFFHOOK狀態 ，當你再次調用結束它去IDLE狀態

更多信息請參考 這

How to know whether I am in a call on Android?

Ë DIT：

@Override 
    public void onCallStateChanged(int state, String incomingNumber) { 
     super.onCallStateChanged(state, incomingNumber); 

     switch (state) { 
      case TelephonyManager.CALL_STATE_IDLE: 
       // Toast.makeText(context, "Idle", Toast.LENGTH_LONG).show(); 
       if(UDF.phoneState != TelephonyManager.CALL_STATE_IDLE) { 
        //Here you are came from offhook because value of UDF.phoneState != TelephonyManager.CALL_STATE_IDLE 
        //IDLE is calls many times so you have to keep track by a static variable like UDF.phoneState 
       } 
       break; 
      case TelephonyManager.CALL_STATE_OFFHOOK: 
       //Toast.makeText(context, "Idle", Toast.LENGTH_LONG).show(); 
       break; 
      case TelephonyManager.CALL_STATE_RINGING: 
       //Toast.makeText(context, "Idle", Toast.LENGTH_LONG).show(); 
       endCallIfBlocked(incomingNumber); 
       break; 

      default: 
       break; 
     } 
     UDF.phoneState = state; 
    }