Solution for Android LocationManager.getLastKnownLocation() returns null

Consider four things, If map application is not running as your expecting.

To display a Google Maps application, we need to configure the required permission in your application. The permissions required are:

• android.permission.ACCESS_COARSE_LOCATION or android.permission.ACCESS_FINE_LOCATION
• android.permission.INTERNET

Generate your own android:apiKey

Check any one of the location is detecting or not

• Wi-Fi based
• Network Cell based
• GPS based

Enable "Use wireless networks" in location settings, If it is not enabled, LocationManager.getLastKnownLocation() returns null.

Ensure above all the points before running map application.