getAllCellInfo() returns 空列表以纪念 9n

Question

getAllCellInfo() returns honor 9n 中的空列表。我用于获取 Cell id 和 Location 区号。那么我将如何获取小区 ID 和位置区号。

我也试过getCellLocation()。当 GPS 打开时，我得到了 Cell id 和 Location area code。我想在 GPS 处于关闭状态时获取小区 ID 和位置区号。（OS Android 奥利奥）。

TelephonyManager tel = (TelephonyManager) getContext().getSystemService(Context.TELEPHONY_SERVICE);                                                                        

    if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
            ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        // TODO: Consider calling
        //    ActivityCompat#requestPermissions
        // here to request the missing permissions, and then overriding
        //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
        //                                          int[] grantResults)
        // to handle the case where the user grants the permission. See the documentation
        // for ActivityCompat#requestPermissions for more details.
        return;
    }                                                  

    CellLocation gsmCellLocation1 = tel.getCellLocation();
    if(gsmCellLocation1!=null){
        Log.e("gsmCellLocation1: ", String.valueOf(gsmCellLocation1));
    }else{
        Log.e("gsmCellLocation1: ", "nul 1");

    }                      

    GsmCellLocation location33 = (GsmCellLocation) tel.getCellLocation();
    if(location33!=null){
        Log.e("location33: ", String.valueOf(location33));
    }else{
        Log.e("location33: ", "nul 33");

    }

    final List<CellInfo> gsmCellLocation2 = tel.getAllCellInfo();
    if(gsmCellLocation2!=null){
        Log.e("gsmCellLocation2: ", String.valueOf(gsmCellLocation2));
    }else{
        Log.e("gsmCellLocation2: ", "nul 2");

    }

Answer 1

使用

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

并使用它代替 getCellLocation().

getNeighboringCellInfo()

Answer 2

如果用户在设备上禁用了设备位置运行 Android 9，以下方法不提供结果：

getAllCellInfo()
listen()
getCellLocation()
getNeighboringCellInfo()

Answer 3

我遇到了同样的问题，我的代码在 Android 版本低于 9 的设备上工作。当禁用设备位置时，getAllCellInfo() returns Android 9 我正在测试的设备。当设备位置开启时，一切正常。

getAllCellInfo() returns 空列表以纪念 9n

getAllCellInfo() returns empty list in honor 9n

android

android-8.0-oreo