Androidのシステム位置情報をoffにしているユーザーに設定を促すダイアログ

RequestGPSDialogFragment.java

package xxxxx.fragment;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;

import xxxxx.R;

public class RequestGPSDialogFragment extends DialogFragment {
    static RequestGPSDialogFragment newInstance() {
        RequestGPSDialogFragment f = new RequestGPSDialogFragment();
        return f;
    }

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        return new AlertDialog.Builder(getActivity())
                .setMessage(getActivity().getResources().getString(R.string.dialog_gps_enable))
                .setPositiveButton(
                        getActivity().getResources().getString(R.string.dialog_gps_enable_button),
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int whichButton) {
                                Intent callGPSSettingIntent = new Intent(
                                        android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                                startActivity(callGPSSettingIntent);
                                dismiss();
                            }
                        }
                )
                .setNegativeButton(android.R.string.cancel,
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int whichButton) {
                                dismiss();
                            }
                        }
                )
                .create();
    }
}