java - 当用户禁用 GPS 时如何在 MapActivity 上收到警报

Question

我正在使用java在android中制作一个应用程序，它在 map 上显示当前地址，并在gps关闭时发出警报。

public class LocationManagerCheck {

    LocationManager locationManager;
    Boolean locationServiceBoolean = false;
    int providerType = 0;
    static AlertDialog alert;

    public LocationManagerCheck(Context context) {
        locationManager = (LocationManager) context
                .getSystemService(Context.LOCATION_SERVICE);
        boolean gpsIsEnabled = locationManager
                .isProviderEnabled(LocationManager.GPS_PROVIDER);
        boolean networkIsEnabled = locationManager
                .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if (networkIsEnabled == true && gpsIsEnabled == true) {
            locationServiceBoolean = true;
            providerType = 1;

        } else if (networkIsEnabled != true && gpsIsEnabled == true) {
            locationServiceBoolean = true;
            providerType = 2;

        } else if (networkIsEnabled == true && gpsIsEnabled != true) {
            locationServiceBoolean = true;
            providerType = 1;
        }

    }

    public Boolean isLocationServiceAvailable() {
        return locationServiceBoolean;
    }

    public int getProviderType() {
        return providerType;
    }

    public void createLocationServiceError(final Activity activity) {

        // show alert dialog if Internet is not connected
        AlertDialog.Builder builder = new AlertDialog.Builder(activity);

        builder.setMessage(
                "You need to activate location service to use this feature. Please turn on network or GPS mode in location settings")
                .setTitle("LostyFound")
                .setCancelable(false)
                .setPositiveButton("Settings",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                Intent intent = new Intent(
                                        Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                                activity.startActivity(intent);
                                dialog.dismiss();
                            }
                        })
                .setNegativeButton("Cancel",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                dialog.dismiss();
                            }
                        });
        alert = builder.create();
        alert.show();
    }

我使用的代码仅在 Mapactivity 启动时显示警报，但在 activity 期间不显示警报。我只想在 GPS 关闭时向我显示警报 bo或者在 MapActivity 打开期间由用户禁用，请帮助我找到正确的代码，提前致谢。

Answer 1

您可能想知道用户是否打开/关闭 GPS。这个question可能有帮助