安卓：CELLID不能适用于所有的运营商？ [英] Android: CellID not available on all carriers?

问题描述

当我要求小区ID和LAC信息，在某些设备上，我不能retreive他们。

我用这个code：

  TelephonyManager TM =（TelephonyManager）getSystemService（Context.TELEPHONY_SERVICE）;
位置=（GsmCellLocation）tm.getCellLocation（）;CELLID = location.getCid（）;LAC = location.getLac（）;
 

1. 有谁知道为什么有些GSM运营商不提供呢？


2. 请我需要为权限？


3. 要了解哪些内容是关于存在的retreiving的CellID和LAC？

解决方案

所以，你可以尝试类似。我有小区ID和位置区code为GSM。但对于UMTS，getCid（）返回一个大数目为33 exple 166 248.所以我加模运算符（exple xXx.getCid（）％0xFFFF的）。

  GsmCellLocation cellLocation =（GsmCellLocation）telm.getCellLocation（）;    new_cid = cellLocation.getCid（）％0xFFFF的;
    new_lac = cellLocation.getLac（）％0xFFFF的;
 

When I request the Cell ID and LAC information, on some devices I cannot retreive them.

I use this code:

TelephonyManager tm =(TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
location = (GsmCellLocation) tm.getCellLocation();

cellID = location.getCid();

lac = location.getLac();

1. Does anyone know why some GSM carriers do not provide them?
2. Do I need permissions for that?
3. What else is there to know about retreiving the CellID and LAC?

解决方案

So you can try something like. I have got cell id and the location area code for GSM. But for UMTS, getCid () returns a big number for exple 33 166 248. So i add modulo operator (exple xXx.getCid() % 0xffff).

GsmCellLocation cellLocation = (GsmCellLocation)telm.getCellLocation();

    new_cid = cellLocation.getCid() % 0xffff;
    new_lac = cellLocation.getLac() % 0xffff;

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