/walkytalky/src/com/googlecode/eyesfree/walkytalky/WalkyTalky.java

  1/*
  2 * Copyright (C) 2010 Google Inc.
  3 *
  4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
  5 * use this file except in compliance with the License. You may obtain a copy of
  6 * 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, WITHOUT
 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 13 * License for the specific language governing permissions and limitations under
 14 * the License.
 15 */
 16
 17package com.googlecode.eyesfree.walkytalky;
 18
 19import android.app.Activity;
 20import android.app.AlertDialog;
 21import android.content.ActivityNotFoundException;
 22import android.content.BroadcastReceiver;
 23import android.content.Context;
 24import android.content.DialogInterface;
 25import android.content.Intent;
 26import android.content.IntentFilter;
 27import android.net.Uri;
 28import android.os.Bundle;
 29import android.util.Log;
 30
 31import java.io.UnsupportedEncodingException;
 32import java.net.URLEncoder;
 33
 34/**
 35 * Generates status notifications of the user's position as they walk.
 36 * 
 37 * @author clchen@google.com (Charles L. Chen)
 38 * @author hiteshk@google.com (Hitesh Khandelwal)
 39 */
 40
 41public class WalkyTalky extends Activity {
 42    /** Request code for NewLocationActivity. */
 43    private static final int NEW_LOCATION_REQUEST = 0;
 44
 45    /** Tag used for logging. */
 46    public static final String TAG = "WalkyTalky";
 47
 48    private WalkyTalky self;
 49    
 50    private BroadcastReceiver mScreenOffReceiver = new BroadcastReceiver() {
 51        @Override
 52        public void onReceive(Context arg0, Intent arg1) {
 53            startNotifications();
 54        }
 55    };
 56
 57    @Override
 58    /** Called when the activity is first created. */
 59    public void onCreate(Bundle savedInstanceState) {
 60        super.onCreate(savedInstanceState);
 61        self = this;
 62
 63        registerReceiver(mScreenOffReceiver, new IntentFilter(Intent.ACTION_SCREEN_OFF));
 64    }
 65
 66    private void startNotifications() {
 67        // Start Position Notification service
 68        Intent iPSNS = new Intent(self, PositionStatusNotificationService.class);
 69        iPSNS.putExtra("ACTION", "Start");
 70        iPSNS.putExtra("SPEAK", false);
 71        iPSNS.putExtra("POST_MESSAGE", true);
 72        self.startService(iPSNS);
 73    }
 74
 75    @Override
 76    public void onResume() {
 77        super.onResume();
 78        // Start New location activity
 79        Intent newLoc = new Intent(self, NewLocationActivity.class);
 80        newLoc.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
 81        startActivityIfNeeded(newLoc, NEW_LOCATION_REQUEST);
 82    }
 83
 84    @Override
 85    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 86        if (requestCode == NEW_LOCATION_REQUEST && (resultCode == RESULT_OK)) {
 87            launchDriveAbout(data.getStringExtra("LOC"));
 88        } else if (requestCode == NEW_LOCATION_REQUEST && (resultCode == RESULT_FIRST_USER)) {
 89            // Back button pressed in NewLocationActivity
 90            finish();
 91        }
 92    }
 93
 94    private void launchDriveAbout(String destination) {
 95        String dest = destination;
 96        try {
 97            dest = URLEncoder.encode(destination, "UTF-8");
 98        } catch (UnsupportedEncodingException e) {
 99            e.printStackTrace();
100        }
101
102        Intent iNavigate = new Intent("android.intent.action.VIEW");
103        iNavigate.setData(Uri.parse("http://maps.google.com/maps?myl=saddr&daddr=" + dest
104                + "&dirflg=w&nav=1"));
105        iNavigate.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
106        iNavigate.setClassName("com.google.android.apps.maps",
107                "com.google.android.maps.driveabout.app.NavigationActivity");
108
109        // Make DriveAbout do a warning chime before it speaks a direction
110        iNavigate.putExtra("CHIME_BEFORE_SPEECH", true);
111        try {
112            startActivity(iNavigate);
113        } catch (ActivityNotFoundException e) {
114            // you need to install driveabout
115            AlertDialog alertDialog = new AlertDialog.Builder(this).create();
116            alertDialog.setTitle("Google Maps required");
117            alertDialog.setMessage("Google Maps navigation is required to use this functionality.");
118            alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
119                @Override
120                public void onClick(DialogInterface dialog, int which) {
121
122                }
123            });
124        }
125
126        startNotifications();
127    }
128
129    @Override
130    public void onDestroy() {
131        Intent i = new Intent(self, PositionStatusNotificationService.class);
132        i.putExtra("ACTION", "STOP");
133        self.startService(i);
134        unregisterReceiver(mScreenOffReceiver);
135        super.onDestroy();
136    }
137}