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      1 /*
      2  * Copyright (C) 2014 Google Inc. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.wearable.speedtracker;
     18 
     19 import com.google.android.gms.maps.CameraUpdateFactory;
     20 import com.google.android.gms.maps.GoogleMap;
     21 import com.google.android.gms.maps.MapFragment;
     22 import com.google.android.gms.maps.model.LatLng;
     23 import com.google.android.gms.maps.model.LatLngBounds;
     24 import com.google.android.gms.maps.model.PolylineOptions;
     25 
     26 import android.app.Activity;
     27 import android.app.DatePickerDialog;
     28 import android.os.AsyncTask;
     29 import android.os.Bundle;
     30 import android.text.format.DateUtils;
     31 import android.util.Log;
     32 import android.view.View;
     33 import android.widget.DatePicker;
     34 import android.widget.TextView;
     35 
     36 import com.example.android.wearable.speedtracker.common.LocationEntry;
     37 
     38 import java.util.ArrayList;
     39 import java.util.Calendar;
     40 import java.util.List;
     41 
     42 /**
     43  * The main activity for the handset application. When a watch device reconnects to the handset
     44  * app, the collected GPS data on the watch, if any, is synced up and user can see his/her track on
     45  * a map. This data is then saved into an internal database and the corresponding data items are
     46  * deleted.
     47  */
     48 public class PhoneMainActivity extends Activity implements DatePickerDialog.OnDateSetListener {
     49 
     50     private static final String TAG = "PhoneMainActivity";
     51     private static final int BOUNDING_BOX_PADDING_PX = 50;
     52     private TextView mSelectedDateText;
     53     private GoogleMap mMap;
     54 
     55     @Override
     56     protected void onCreate(Bundle savedInstanceState) {
     57         super.onCreate(savedInstanceState);
     58         setContentView(R.layout.main_activity);
     59         mSelectedDateText = (TextView) findViewById(R.id.selected_date);
     60         mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
     61     }
     62 
     63     public void onClick(View view) {
     64         Calendar calendar = Calendar.getInstance();
     65         calendar.setTimeInMillis(System.currentTimeMillis());
     66         new DatePickerDialog(PhoneMainActivity.this, PhoneMainActivity.this,
     67                 calendar.get(Calendar.YEAR),
     68                 calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH)).show();
     69     }
     70 
     71     @Override
     72     public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
     73         // the following if-clause is to get around a bug that causes this callback to be called
     74         // twice
     75         if (view.isShown()) {
     76             Calendar calendar = Calendar.getInstance();
     77             calendar.setTimeInMillis(System.currentTimeMillis());
     78             calendar.set(Calendar.YEAR, year);
     79             calendar.set(Calendar.MONTH, monthOfYear);
     80             calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
     81             String date = DateUtils.formatDateTime(this, calendar.getTimeInMillis(),
     82                     DateUtils.FORMAT_SHOW_DATE);
     83             mSelectedDateText.setText(getString(R.string.showing_for_date, date));
     84             showTrack(calendar);
     85         }
     86     }
     87 
     88     /**
     89      * An {@link android.os.AsyncTask} that is responsible for getting a list of {@link
     90      * com.example.android.wearable.speedtracker.common.LocationEntry} objects for a given day and
     91      * building a track from those points. In addition, it sets the smallest bounding box for the
     92      * map that covers all the points on the track.
     93      */
     94     private void showTrack(Calendar calendar) {
     95         new AsyncTask<Calendar, Void, Void>() {
     96 
     97             private List<LatLng> coordinates;
     98             private LatLngBounds bounds;
     99 
    100             @Override
    101             protected Void doInBackground(Calendar... params) {
    102                 LocationDataManager dataManager = ((PhoneApplication) getApplicationContext())
    103                         .getDataManager();
    104                 List<LocationEntry> entries = dataManager.getPoints(params[0]);
    105                 if (entries != null && !entries.isEmpty()) {
    106                     coordinates = new ArrayList<LatLng>();
    107                     LatLngBounds.Builder builder = new LatLngBounds.Builder();
    108                     for (LocationEntry entry : entries) {
    109                         LatLng latLng = new LatLng(entry.latitude, entry.longitude);
    110                         builder.include(latLng);
    111                         coordinates.add(latLng);
    112                     }
    113                     bounds = builder.build();
    114                 }
    115                 return null;
    116             }
    117 
    118             @Override
    119             protected void onPostExecute(Void aVoid) {
    120                 mMap.clear();
    121                 if (coordinates == null || coordinates.isEmpty()) {
    122                     if (Log.isLoggable(TAG, Log.DEBUG)) {
    123                         Log.d(TAG, "No Entries found for that date");
    124                     }
    125                 } else {
    126                     mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds,
    127                             BOUNDING_BOX_PADDING_PX));
    128                     mMap.addPolyline(new PolylineOptions().geodesic(true).addAll(coordinates));
    129                 }
    130             }
    131 
    132         }.execute(calendar);
    133     }
    134 }
    135