Android GPS更新位置

Question

I am making simple application which based on phone's location. I am using this code for GPS location. In the main() function I am requesting the GPS location and then I am working with it. (I am calculating the sunrise and sunset)

I can get the location, but when I start the application I get the LastKnown location. So, if I want real "new one" location I must wait for GPS lock on and then restart the application.

So, my question is: How can I get a "fresh" location?

Ok. I have an idea.

Can I call MainActivity refresh from another class?

in GPS class I have this

private final Context mContext;

@Override
public void onLocationChanged(Location location) {
    startActivity(new Intent(mContext, MainActivity.class));
}

But this doesn't work. Can anyone help?

Answer 1

Here is the overview of location services in Android. Here is the LocationManager class at the heart of location services in Android.

Here is an Android developer tutorial on "Location Strategies". Here is another tutorial that might be usable.

Also, you cannot just ask Android for your current position, since GPS may take quite some time to get a fix. Instead, you need to request location updates and use the first update you get, or similar patterns.