android - 如何在 Android 应用程序中获得准确的信号强度？

Question

我使用CellInfo 每秒捕获信号强度和 ARFCN/UARFCN/EARFCN。

但是，我认为这不是很准确。它总是比电话设置中显示的信号强度差 -5 ~ -10 dBm。有时，我也得到 0 或 integer.MAX_VALUE。我的代码有问题还是有其他方法可以捕获真实信号强度？

var cellInfoList: List<CellInfo> = mTelephonyManager.allCellInfo
if (cellInfoList.isNotEmpty()) {
    for (cellInfo in cellInfoList) {
        if (cellInfo is CellInfoLte) {
            val cellSignalStrengthLte = cellInfo.cellSignalStrength
            val cellIdentityLte = cellInfo.cellIdentity
            var arfcn = cellIdentityLte.earfcn
            intSignalStrength = cellSignalStrengthLte.dbm
            networkStatus = "${Integer.toString(intSignalStrength)} dBm | $arfcn"
        } else if (cellInfo is CellInfoGsm) {
            val cellSignalStrengthGsm = cellInfo.cellSignalStrength
            val cellIdentityGsm = cellInfo.cellIdentity
            var arfcn = cellIdentityGsm.arfcn
            intSignalStrength = cellSignalStrengthGsm.dbm
            networkStatus = "${Integer.toString(intSignalStrength)} dBm | $arfcn"
        } else if (cellInfo is CellInfoWcdma) {
            val cellSignalStrengthWcdma = cellInfo.cellSignalStrength
            val cellIdentityWcdma = cellInfo.cellIdentity
            var arfcn = uarfcnToBand(cellIdentityWcdma.uarfcn)
            intSignalStrength = cellSignalStrengthWcdma.dbm
            networkStatus = "${Integer.toString(intSignalStrength)} dBm | $arfcn"
        } else if (cellInfo is CellInfoCdma) {
            val cellSignalStrengthCdma = cellInfo.cellSignalStrength
            intSignalStrength = cellSignalStrengthCdma.dbm
            networkStatus = "${Integer.toString(intSignalStrength)} dBm"
        }
    }
}

Answer 1

我得到了解决方案。问题在于 for 循环。最新的信号强度是第一个循环，所以下面的循环将涵盖我需要的结果。