How to check if GPS is Disabled Android [duplicate

问题:

This question already has answers here:

How do I find out if the GPS of an Android device is enabled (10 answers)

Closed 4 years ago.

I have two files MainActivity.java and HomeFragment.java in the MainActivity calls a function from HomeFragment that asks the user to turn on the location services on their phone. The problem is even when the user has the location feature already turned on the function is called anyway. Is there a way I can make it so only when the location feature is off that the function from the HomeFragment is launched.

HomeFragment.java

public static void displayPromptForEnablingGPS(
        final Activity activity)
{
    final AlertDialog.Builder builder =
            new AlertDialog.Builder(activity);
    final String action = Settings.ACTION_LOCATION_SOURCE_SETTINGS;
    final String message = "Enable either GPS or any other location"
            + " service to find current location.  Click OK to go to"
            + " location services settings to let you do so.";


    builder.setMessage(message)
            .setPositiveButton("OK",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface d, int id) {
                            activity.startActivity(new Intent(action));
                            d.dismiss();
                        }
                    });

    builder.create().show();
}

MainActivity.java

public void showMainView() {
    HomeFragment.displayPromptForEnablingGPS(this);
}

Thank you :)

回答1:

You could use something like this:

final LocationManager manager = (LocationManager) getSystemService( Context.LOCATION_SERVICE );

if ( !manager.isProviderEnabled( LocationManager.GPS_PROVIDER ) ) {
    // Call your Alert message
}

That should do the trick.

To check if Location Services are enabled, you can use code similar to this:

String locationProviders = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if (locationProviders == null || locationProviders.equals("")) {
...
startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
}

Source: Marcus' Post found here