Android™ Application Development - Bahar Ali Khan

More documents

Recommendations

Info

Chapter 7: Maps, Geocoding, and Location-Based Services Creating Map-Based Activities 224 The MapView provides a compelling User Interface option for presentation of geographical data. One of the most intuitive ways of providing context for a physical location or address is to display it on a map. Using a MapView, you can create Activities that feature an interactive map. Map Views support annotation using both Overlays and by pinning Views to geographical locations. Map Views offer full programmatic control of the map display, letting you control the zoom, location, and display modes — including the option to display satellite, street, and traffi c views. In the following sections, you’ll see how to use Overlays and the MapController to create dynamic map-based Activities. Unlike online mashups, your map Activities will run natively on the device, allowing you to leverage its hardware and mobility to provide a more customized and personal user experience. Introducing MapView and MapActivity This section introduces several classes used to support Android maps: ❑ MapView is the actual Map View (control). ❑ MapActivity is the base class you extend to create a new Activity that can include a Map View. The MapActivity class handles the application life cycle and background service management required for displaying maps. As a result, you can only use a MapView within MapActivity-derived Activities. ❑ Overlay is the class used to annotate your maps. Using Overlays, you can use a Canvas to draw onto any number of layers that are displayed on top of a Map View. ❑ MapController is used to control the map, allowing you to set the center location and zoom levels. ❑ MyLocationOverlay is a special overlay that can be used to display the current position and orientation of the device. ❑ ItemizedOverlays and OverlayItems are used together to let you create a layer of map markers, displayed using drawable with associated text. Creating a Map-Based Activity To use maps in your applications, you need to create a new Activity that extends MapActivity. Within it, add a MapView to the layout to display a Google Maps interface element. The Android map library is not a standard package; as an optional API, it must be explicitly included in the application manifest before it can be used. Add the library to your manifest using a uses-library tag within the application node, as shown in the XML snippet below:
Chapter 7: Maps, Geocoding, and Location-Based Services Google Maps downloads the map tiles on demand; as a result, it implicitly requires permission to use the Internet. To see map tiles in your Map View, you need to add a uses-permission tag to your application manifest for android.permission.INTERNET, as shown below: Once you’ve added the library and confi gured your permission, you’re ready to create your new mapbased Activity. MapView controls can only be used within an Activity that extends MapActivity. Override the onCreate method to lay out the screen that includes a MapView, and override isRouteDisplayed to return true if the Activity will be displaying routing information (such as traffi c directions). The following skeleton code shows the framework for creating a new map-based Activity: import com.google.android.maps.MapActivity; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import android.os.Bundle; public class MyMapActivity extends MapActivity { private MapView mapView; private MapController mapController; } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.map_layout); mapView = (MapView)findViewById(R.id.map_view); } @Override protected boolean isRouteDisplayed() { // IMPORTANT: This method must return true if your Activity // is displaying driving directions. Otherwise return false. return false; } The corresponding layout fi le used to include the MapView is shown below. Note that you need to include a maps API key in order to use a Map View in your application.
Page 1 and 2:
Professional Android Application su
Page 3:
Professional Android Application D
Page 6 and 7:
Professional Android Application D
Page 8 and 9:
About the Author Originally from Pe
Page 10 and 11:
Acknowledgments A big thank you goe
Page 12 and 13:
Contents Chapter 2: Getting Started
Page 14 and 15:
Contents xii Saving and Loading Fil
Page 16 and 17:
Contents Chapter 10: Accessing Andr
Page 19 and 20:
Introduction Now is an exciting tim
Page 21 and 22:
Introduction covered, you can move
Page 23:
Introduction At http://p2p.wrox.com
Page 26 and 27:
Chapter 1: Hello, Android 2 Using t
Page 28 and 29:
Chapter 1: Hello, Android An Open P
Page 30 and 31:
Chapter 1: Hello, Android 6 ❑ ❑
Page 32 and 33:
Chapter 1: Hello, Android 8 When ma
Page 34 and 35:
Chapter 1: Hello, Android 10 In mar
Page 36 and 37:
Chapter 1: Hello, Android 12 Each A
Page 38 and 39:
Chapter 1: Hello, Android 14 ❑ Da
Page 40 and 41:
Chapter 1: Hello, Android 16 ❑ an
Page 43 and 44:
Getting Started All you need to sta
Page 45 and 46:
Chapter 2: Getting Started Unless o
Page 47 and 48:
Installing the ADT Plug-in Install
Page 49 and 50:
Chapter 2: Getting Started 3. In th
Page 51 and 52:
Chapter 2: Getting Started If every
Page 53 and 54:
} lp = new LinearLayout.LayoutParam
Page 55 and 56:
❑ ❑ ❑ ❑ ❑ Small screens w
Page 57 and 58:
Chapter 2: Getting Started on how t
Page 59 and 60:
Chapter 2: Getting Started To start
Page 61 and 62:
Ensuring a Seamless User Experience
Page 63 and 64:
Figure 2-11 Chapter 2: Getting Star
Page 65 and 66:
} myListView.setAdapter(aa); Chapte
Page 67 and 68:
Chapter 2: Getting Started A number
Page 69 and 70:
Creating Applications and Activitie
Page 71 and 72:
Chapter 3: Creating Applications an
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Creating Resources Chapter 3: Creat
Page 79 and 80:
❑ ❑ #ARGB #ARRGGBB Chapter 3: C
Page 81 and 82:
Page 83 and 84:
android:startOffset=”500” andro
Page 85 and 86:
Referencing Resources in Resources
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
} } Chapter 3: Creating Application
Page 97:
Page 100 and 101:
Chapter 4: Creating User Interfaces
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Chapter 5: Intents, Broadcast Recei
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 183 and 184:
Data Storage, Retrieval, and Sharin
Page 185 and 186:
Chapter 6: Data Storage, Retrieval,
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
} Chapter 6: Data Storage, Retrieva
Page 195 and 196:
Page 197 and 198: } Chapter 6: Data Storage, Retrieva
Page 199 and 200: Chapter 6: Data Storage, Retrieval,
Page 203 and 204: } } } Chapter 6: Data Storage, Retr
Page 205 and 206: Querying Your Database Chapter 6: D
Page 211 and 212: } // Open or create the database to
Page 215 and 216: Adding, Updating, and Deleting Cont
Page 221 and 222: } } Chapter 6: Data Storage, Retrie
Page 227 and 228: } } break; Chapter 6: Data Storage,
Page 231 and 232: Maps, Geocoding, and Location-Based
Page 233 and 234: Chapter 7: Maps, Geocoding, and Loc
Page 235 and 236: } Chapter 7: Maps, Geocoding, and L
Page 247: Chapter 7: Maps, Geocoding, and Loc
Page 271: Summary Chapter 7: Maps, Geocoding,
Page 274 and 275: Chapter 8: Working in the Backgroun
Page 298 and 299:
Chapter 8: Working in the Backgroun
Page 300 and 301:
Chapter 8: Working in the Backgroun
Page 303 and 304:
Peer-to-Peer Communication In this
Page 305 and 306:
Chapter 9: Peer-to-Peer Communicati
Page 307 and 308:
} Chapter 9: Peer-to-Peer Communica
Page 309 and 310:
Handling Subscription Requests Chap
Page 311 and 312:
Page 313 and 314:
Page 315 and 316:
Page 317 and 318:
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
Page 325 and 326:
Page 327 and 328:
Figure 9-4 Chapter 9: Peer-to-Peer
Page 329 and 330:
Page 331 and 332:
Page 333 and 334:
Page 335 and 336:
Page 337 and 338:
Page 339 and 340:
Accessing Android Hardware Android
Page 341 and 342:
Chapter 10: Accessing Android Hardw
Page 343 and 344:
content.put(Audio.AudioColumns.DATE
Page 345 and 346:
public void onShutter() { // TODO D
Page 347 and 348:
Page 349 and 350:
Page 351 and 352:
Page 353 and 354:
Page 355 and 356:
public void setPitch(float pitch) {
Page 357 and 358:
} setContentView(R.layout.main); Ch
Page 359 and 360:
Page 361 and 362:
Page 363 and 364:
Page 365 and 366:
Page 367 and 368:
Page 369 and 370:
Page 371 and 372:
Page 373 and 374:
Page 375:
Page 378 and 379:
Chapter 11: Advanced Android Develo
Page 380 and 381:
Page 382 and 383:
Page 384 and 385:
Page 386 and 387:
Page 388 and 389:
Page 390 and 391:
Page 392 and 393:
Page 394 and 395:
Page 396 and 397:
Page 398 and 399:
Page 400 and 401:
Page 402 and 403:
Page 404 and 405:
Page 406 and 407:
Page 408 and 409:
Page 410 and 411:
Page 412 and 413:
Page 414 and 415:
Page 416 and 417:
Page 418 and 419:
Page 420 and 421:
Page 422 and 423:
Page 424 and 425:
400 Android, getting started Androi
Page 426 and 427:
402 databases databases creating ea
Page 428 and 429:
404 interapplication communication
Page 430 and 431:
406 passing custom class objects pa
Page 432 and 433:
408 synchronizing threads synchroni
Page 435 and 436:
Programmer to Programmer Get more
show all

Android™ Application Development - Bahar Ali Khan

Create successful ePaper yourself

Delete template?

Save as template?