PhoneStateListener

PhoneStateListener是Android SDK提供用來監控目前和SIM卡網路狀態有關的一個類別,
從官網可以看到有以下狀態可查看:

LISTEN_CALL_FORWARDING_INDICATOR
查看來電轉接狀態是否有改變

LISTEN_CALL_STATE
查看通話狀態是否有改變

LISTEN_CELL_INFO
查看連線到的基地台資訊

LISTEN_CELL_LOCATION
查看連線到的基地台位置

LISTEN_DATA_ACTIVITY
查看以SIM卡上網的網路傳輸狀態改變

LISTEN_DATA_CONNECTION_STATE
查看以SIM卡上網的連線狀態改變

LISTEN_MESSAGE_WAITING_INDICATOR
查看語音留言狀態的改變

LISTEN_NONE
用以取消所有監控的事件

LISTEN_SERVICE_STATE
查看以SIM卡上網的網路狀態改變

LISTEN_SIGNAL_STRENGTHS
查看以SIM卡上網的訊號改變

使用方式:

// get TelephonyManager
mTelephonyManager=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
stateListener = new PhoneStateListener(){
@Override
    public void onDataConnectionStateChanged(int state){
        switch(state){
        case TelephonyManager.DATA_DISCONNECTED:
            Log.i("State: ", "DISCONNECTED");
            break;
        case TelephonyManager.DATA_SUSPENDED:
            Log.i("State: ", "SUSPENDED");
            break;
        }
    }       

@Override
public void onServiceStateChanged (ServiceState serviceState) {
super.onServiceStateChanged(serviceState);
String phonestate;

switch(serviceState.getState()) {
case ServiceState.STATE_EMERGENCY_ONLY:
phonestate ="STATE_EMERGENCY_ONLY";
break;
case ServiceState.STATE_IN_SERVICE:
phonestate ="STATE_IN_SERVICE";
break;
case ServiceState.STATE_OUT_OF_SERVICE:
phonestate ="STATE_OUT_OF_SERVICE";
break;
case ServiceState.STATE_POWER_OFF:
phonestate ="STATE_POWER_OFF";
break;
default:
phonestate = "Unknown";
break;
}
}


};

//start listening
mTelephonyManager.listen(stateListener,
            PhoneStateListener.LISTEN_DATA_CONNECTION_STATE
           |PhoneStateListener.LISTEN_SERVICE_STATE);