Android：广播接收器中的电话状态

Question

我使用广播接收器来捕获电话状态更改。 它在第一次（对于State_OffHook）状态改变时正常工作，但在通话结束时不会作出反应。 这是我的代码：

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

当你有没有打电话给你是IDLE状态，当你得到一个呼叫它去OFFHOOK状态 ，当你再次调用结束它去IDLE状态

更多信息请参考 这

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; 
    }