本地化是返回null。什么是错的code？ [英] Localization is returning null. What is wrong with the code?

问题描述

double longitude = 0;
double latitude = 0;


try {
    LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);

    longitude = location.getLongitude();
    latitude = location.getLatitude();

} catch (Exception e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
}

在此code，纬度和经度返回null.I不想使用互联网来获取位置。

In this code, the latitude and longitude is returning null.I want to get location without using internet.

推荐答案

有什么不对您的code，您正在使用GPS_PROVIDER需要开放天空场获取GPS信息。我建议你​​，如果你想获取侧GPS细节室以及使用NETWORK_PROVIDER。

There nothing wrong with your code, You are using GPS_PROVIDER which requires open sky field to fetch GPS Information. I suggest you to use NETWORK_PROVIDER if you want to fetch GPS details in side the room as well.

try 
{
    LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    Location location = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

    longitude = location.getLongitude();
    latitude = location.getLatitude();

} catch (Exception e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
}

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