MobileUtils.java 文件源码

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private static boolean isApi17CellInfoAvailable(Context context) {
    TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
    List<CellInfo> cells;
    try {
        cells = telephonyManager.getAllCellInfo();
    } catch (SecurityException ex) {
        Log.d("isApi17CellInfoAvailable(): Result = coarse location permission is denied", ex);
        return false;
    }
    if (cells == null || cells.size() == 0) {
        Log.d("isApi17CellInfoAvailable(): Result = no cell info");
        return false;
    }
    CellIdentityValidator validator = new CellIdentityValidator();
    for (CellInfo cell : cells) {
        if (validator.isValid(cell)) {
            Log.d("isApi17CellInfoAvailable(): Result = true");
            return true;
        }
    }
    Log.d("isApi17CellInfoAvailable(): Result = false");
    return false;
}