com.ashwini.location.notification.LocationUtils.java Source code

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Here is the source code for com.ashwini.location.notification.LocationUtils.java

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/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.ashwini.location.notification;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;

import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.util.Log;

/**
 * Defines app-wide constants and utilities
 */
public final class LocationUtils {

    // Debugging tag for the application
    public static final String APPTAG = "LocationSample";

    // Name of shared preferences repository that stores persistent state
    public static final String SHARED_PREFERENCES = "com.example.android.location.SHARED_PREFERENCES";

    // Key for storing the "updates requested" flag in shared preferences
    public static final String KEY_UPDATES_REQUESTED = "com.example.android.location.KEY_UPDATES_REQUESTED";

    /*
     * Define a request code to send to Google Play services
     * This code is returned in Activity.onActivityResult
     */
    public final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;

    /*
     * Constants for location update parameters
     */
    // Milliseconds per second
    public static final int MILLISECONDS_PER_SECOND = 1000;

    // The update interval
    public static final int UPDATE_INTERVAL_IN_SECONDS = 5;

    // A fast interval ceiling
    public static final int FAST_CEILING_IN_SECONDS = 1;

    // Update interval in milliseconds
    public static final long UPDATE_INTERVAL_IN_MILLISECONDS = MILLISECONDS_PER_SECOND * UPDATE_INTERVAL_IN_SECONDS;

    // A fast ceiling of update intervals, used when the app is visible
    public static final long FAST_INTERVAL_CEILING_IN_MILLISECONDS = MILLISECONDS_PER_SECOND
            * FAST_CEILING_IN_SECONDS;

    // Create an empty string for initializing strings
    public static final String EMPTY_STRING = new String();

    /**
     * Get the latitude and longitude from the Location object returned by
     * Location Services.
     *
     * @param currentLocation A Location object containing the current location
     * @return The latitude and longitude of the current location, or null if no
     * location is available.
     */
    public static String getLatLng(Context context, Location currentLocation) {
        // If the location is valid
        if (currentLocation != null) {

            // Return the latitude and longitude as strings
            return context.getString(R.string.latitude_longitude, currentLocation.getLatitude(),
                    currentLocation.getLongitude());
        } else {

            // Otherwise, return the empty string
            return EMPTY_STRING;
        }
    }

    public static boolean servicesConnected(Activity activty) {

        // Check that Google Play services is available
        int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(activty);

        // If Google Play services is available
        if (ConnectionResult.SUCCESS == resultCode) {
            // In debug mode, log the status
            Log.d(LocationUtils.APPTAG, activty.getString(R.string.play_services_available));

            // Continue
            return true;
            // Google Play services was not available for some reason
        } else {
            // Display an error dialog
            Dialog dialog = GooglePlayServicesUtil.getErrorDialog(resultCode, activty, 0);
            if (dialog != null) {
                ErrorDialogFragment errorFragment = new ErrorDialogFragment();
                errorFragment.setDialog(dialog);
                errorFragment.show(((FragmentActivity) activty).getSupportFragmentManager(), LocationUtils.APPTAG);
            }
            return false;
        }
    }

    /**
    * Define a DialogFragment to display the error dialog generated in
    * showErrorDialog.
    */
    public static class ErrorDialogFragment extends DialogFragment {

        private Dialog mDialog;

        public ErrorDialogFragment() {
            super();
            mDialog = null;
        }

        public void setDialog(Dialog dialog) {
            mDialog = dialog;
        }

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            return mDialog;
        }
    }
}