TelephonyManager 在 Android 10 上崩溃

如何解决TelephonyManager 在 Android 10 上崩溃

我在 Crashlytics 中获得了以下堆栈跟踪，适用于各种 android 10 设备。 致命异常：java.lang.NullPointerException 尝试在空对象引用上调用虚拟方法“java.lang.Throwable android.os.ParcelableException.getCause()”

android.telephony.TelephonyManager$1.lambda$onError$2
android.telephony.TelephonyManager$1.lambda$onError$2 (TelephonyManager.java:5346)
android.telephony.-$$Lambda$TelephonyManager$1$DUDjwoHWG36BPTvbfvZqnIO3Y88.run (-.java:6)
java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1167)
java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:641)
java.lang.Thread.run (Thread.java:919)

没有参考应用程序的哪一部分导致此问题，但我正在使用 TelephonyManager 获取设备 MCC 和 MNC，如下所示

  fun getMCCFromDevice(context: Context): String? {
    try {
        val tm = context.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
        if (tm != null) {
            val networkOperator = tm!!.getNetworkOperator()
            if (!TextUtils.isEmpty(networkOperator)) {
                return networkOperator.substring(0,3)
            }
        }
    } catch (e: Exception) {
        e.printstacktrace()
    }

    return null

}

fun getMNCFromDevice(context: Context): String? {
    try {
        val tm = context.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
        if (tm != null) {
            val networkOperator = tm!!.getNetworkOperator()
            if (!TextUtils.isEmpty(networkOperator)) {
                return networkOperator.substring(3) // Extract MNC part
            }
        }
    } catch (e: Exception) {
        e.printstacktrace()
    }

    return null
}