使用方法

Question

我不是Java开发人员，但我正在尝试为Android的Cordova插件添加更多数据。

我不明白为什么不允许这样做？在这里，我试图用方法设置asu的值。

int asu = getSignalStrength();

The method below:

  int signalStrength = 0;


  private int getSignalStrength(CellSignalStrength signal) {
    signalStrength = signal.getAsuLevel();
    return signalStrength;
  }

以下错误：

  

类Sim中的方法getSignalStrength不能应用于给定   类型;         int asu = getSignalStrength（）;

它们不是两种int类型吗？我错了什么

Answer 1

调用getSignalStrength（）时必须添加参数; 如下 -

int asu = getSignalStrength（signal）;

Answer 2

首先创建一个CellSignalStrength的新实例：

 final TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
CellInfoGsm cellInfoGsm = (CellInfoGsm) telephonyManager.getAllCellInfo().get(0);
CellSignalStrengthGsm cellSignalStrengthGsm = cellInfoGsm.getCellSignalStrength();
cellSignalStrengthGsm.getDbm();

然后您可以在方法中将其作为参数传递

int asu = getSignalStrength(cellSignalStrengthGsm);

Answer 3

我只想分享它最终的样子：

TelephonyManager manager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);


      List<CellInfo> cellInfos = manager.getAllCellInfo();   //This will give info of all sims present inside your mobile 
      int asu = 0;
      if(cellInfos!=null){
        for (int i = 0 ; i<cellInfos.size(); i++){
           if (cellInfos.get(i).isRegistered()){
                if (cellInfos.get(i) instanceof CellInfoWcdma) {
                    CellInfoWcdma cellInfoWcdma = (CellInfoWcdma) manager.getAllCellInfo().get(0);
                    CellSignalStrength strength = cellInfoWcdma.getCellSignalStrength();
                    asu = getSignalStrength(strength);
                } else if(cellInfos.get(i) instanceof CellInfoGsm) {
                    CellInfoGsm cellInfogsm = (CellInfoGsm) manager.getAllCellInfo().get(0);
                    CellSignalStrength strength = cellInfogsm.getCellSignalStrength();
                    asu = getSignalStrength(strength);
                } else if(cellInfos.get(i) instanceof CellInfoLte) {
                    CellInfoLte cellInfoLte = (CellInfoLte) manager.getAllCellInfo().get(0);
                    CellSignalStrength strength = cellInfoLte.getCellSignalStrength();
                    asu = getSignalStrength(strength);
                }
            }
        }
    }