Android：广播接收器中的电话状态

Question

我使用广播接收器来捕捉电话状态的变化。 当状态第一次改变时它工作正常（对于 State_OffHook），但在呼叫结束时不反应。 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

当你没有电话时，你处于IDLE状态，当你接到电话时，它进入OFFHOOK状态 当您的通话结束时，它再次转到IDLE 状态

了解更多信息 参考这个

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

编辑：

@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;
     }