LocationActivity.java

/*
 * 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.example.google.location;

import com.example.google.R;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;

import android.app.Dialog;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;

public class LocationActivity extends FragmentActivity {
    public static String TAG = "LocationActivity";
    public static boolean isAppForeground = false;
    private static final int ERROR_DIALOG_ON_CREATE_REQUEST_CODE = 4055;
    private static final int ERROR_DIALOG_ON_RESUME_REQUEST_CODE = 4056;

    // Shared variables
    private GoogleMap mMap;
    private Dialog errorDialog;

    // Location Request variables

    // Activity Recognition variables

    // Geo Fencing variables

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        checkGooglePlayServiceAvailability(ERROR_DIALOG_ON_CREATE_REQUEST_CODE);
    }

    private void init() {
        // Initialize map
        if (mMap == null) {
            FragmentManager myFragmentManager = getSupportFragmentManager();
            SupportMapFragment myMapFragment = (SupportMapFragment) myFragmentManager
                    .findFragmentById(R.id.map);
            mMap = myMapFragment.getMap();
        }

        // Initialize Location Client

        // Initialize Action Recognition

        // Initialize Geo Fencing
    }

    @Override
    public void onPause() {
        super.onPause();

        // Indicate the application is in background
        isAppForeground = false;
    }

    @Override
    public void onResume() {
        super.onResume();

        // Indicate the application is in foreground
        isAppForeground = true;

        checkGooglePlayServiceAvailability(ERROR_DIALOG_ON_RESUME_REQUEST_CODE);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    private void checkGooglePlayServiceAvailability(int requestCode) {
        // Query for the status of Google Play services on the device
        int statusCode = GooglePlayServicesUtil
                .isGooglePlayServicesAvailable(getBaseContext());

        if (statusCode == ConnectionResult.SUCCESS) {
            init();
        } else {
            if (GooglePlayServicesUtil.isUserRecoverableError(statusCode)) {
                errorDialog = GooglePlayServicesUtil.getErrorDialog(statusCode,
                        this, requestCode);
                errorDialog.show();
            } else {
                // Handle unrecoverable error
            }
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            switch (requestCode) {
                case ERROR_DIALOG_ON_CREATE_REQUEST_CODE:
                    init();
                    break;
                case ERROR_DIALOG_ON_RESUME_REQUEST_CODE:
                    break;
            }
        }
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuItem menuItem = menu.add(R.string.clear_map);
        menuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
        menuItem.setOnMenuItemClickListener(new OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                clearMap();
                return true;
            }
        });
        return true;
    }

    public void clearMap() {
        mMap.clear();
    }

}