1page.title=Platforms 2@jd:body 3 4<div id="qv-wrapper"> 5<div id="qv"> 6 7 8<h2>See Also</h2> 9<ol> 10 <li><a href="{@docRoot}about/versions/jelly-bean.html">Jelly Bean 11Highlights and APIs</a></li> 12 <li><a href="{@docRoot}about/versions/android-4.0-highlights.html">Ice Cream Sandwich 13Highlights and APIs</a></li> 14 <li><a href="{@docRoot}about/versions/android-3.0-highlights.html">Honeycomb 15Highlights and APIs</a></li> 16 <li><a href="{@docRoot}about/versions/android-2.3-highlights.html">Gingerbread 17Highlights and APIs</a></li> 18</ol> 19 20</div> 21</div> 22 23 24 25<p>To develop an Android app, you must install at least one Android platform from the SDK Manager 26against which you can compile your app. Often, any given version of the Android will be revised 27with bug fixes or other changes, as denoted by the revision number. Below, you'll find the 28release notes for each version of the platform and the subsequent revisions to the platform 29version.</p> 30 31<p>To determine what revision of an Android platform you have installed, refer to the 32<strong>Installed Packages</strong> listing in the Android SDK Manager.</p> 33 34 35 36 37 38 39<h2 id="4.2">Android 4.2</h2> 40 41 42<p class="caution"><strong>Important:</strong> To download the new Android 434.2.x system components from the Android SDK Manager, you must first update the 44SDK tools to revision 20 or later and restart the Android SDK Manager. If you do not, 45the Android 4.2 system components will not be available for download.</p> 46 47 48<div class="toggle-content opened"> 49 50 <p><a href="#" onclick="return toggleContent(this)"> 51 <img src="{@docRoot}assets/images/triangle-opened.png" 52class="toggle-content-img" alt="" />Revision 1</a> <em>(November 2012)</em> 53 </p> 54 55 <div class="toggle-content-toggleme"> 56 57 <p>Initial release. The system version is 4.2.</p> 58 <dl> 59 <dt>Dependencies:</dt> 60 <dd>SDK Tools r20 or higher is required.</dd> 61 </dl> 62 63 </div> 64</div> 65 66<h3>Device Definitions</h3> 67 68<p>The platform includes the following device definitions for use in creating Android Virtual 69Devices in the <a href="{@docRoot}tools/help/avd-manager.html">AVD Manager</a>:</p> 70 71<ul> 72 <li> 73 Nexus 7 (7.3", 800 x 1280, Large tvdpi screen) 74 </li> 75 <li> 76 Galaxy Nexus (4.7", 720 x 1280, Normal xhdpi screen) 77 </li> 78 <li> 79 Nexus S (4.0", 480 x 800, Normal hdpi screen) 80 </li> 81 <li> 82 Nexus One (3.7", 480 x 720, Normal hdpi screen) 83 </li> 84 <li> 85 10.1" WXGA Tablet (1280 x 800, X-Large mdpi screen) 86 </li> 87 <li> 88 7.0" WSVGA Tablet (1024 x 600, Large mdpi screen) 89 </li> 90 <li> 91 5.4" FWVGA (480 x 854, Large mdpi screen) 92 </li> 93 <li> 94 5.1" WVGA (480 x 800, Large mdpi screen) 95 </li> 96 <li> 97 4.7" WXGA (1280 x 720, Normal xhdpi screen) 98 </li> 99 <li> 100 4.65" 720p (720 x 1280, Normal xhdpi screen) 101 </li> 102 <li> 103 4.0" WVGA (480 x 800, Normal hdpi screen) 104 </li> 105 <li> 106 3.7" WVGA (480 x 800, Normal hdpi screen) 107 </li> 108 <li> 109 3.7" FWVGA slider (480 x 854, Normal hdpi screen) 110 </li> 111 <li> 112 3.4" WQVGA (240 x 432, Normal ldpi screen) 113 </li> 114 <li> 115 3.3" WQVGA (240 x 400, Normal ldpi screen) 116 </li> 117 <li> 118 3.2" QVGA ADP2 (320 x 480, Normal mdpi screen) 119 </li> 120 <li> 121 3.2" HVGA slider ADP1 (320 x 480, Normal mdpi screen) 122 </li> 123 <li> 124 2.7" QVGA slider (240 x 320, Small ldpi screen) 125 </li> 126 <li> 127 2.7" QVGA (240 x 320, Small ldpi screen) 128 </li> 129</ul> 130 131 132 133<h2 id="4.1">Android 4.1</h2> 134 135 136<p class="caution"><strong>Important:</strong> To download the new Android 1374.1.x system components from the Android SDK Manager, you must first update the 138SDK tools to revision 20 or later and restart the Android SDK Manager. If you do not, 139the Android 4.1 system components will not be available for download.</p> 140 141 142<div class="toggle-content closed"> 143 144 <p><a href="#" onclick="return toggleContent(this)"> 145 <img src="{@docRoot}assets/images/triangle-closed.png" 146class="toggle-content-img" alt="" />Revision 3</a> <em>(October 2012)</em> 147 </p> 148 149 <div class="toggle-content-toggleme"> 150 151 <p>Maintenance update. The system version is 4.1.2.</p> 152 <dl> 153 <dt>Dependencies:</dt> 154 <dd>SDK Tools r20 or higher is required.</dd> 155 </dl> 156 157 </div> 158</div> 159 160<div class="toggle-content closed"> 161 162 <p><a href="#" onclick="return toggleContent(this)"> 163 <img src="{@docRoot}assets/images/triangle-closed.png" 164class="toggle-content-img" alt="" />Revision 2</a> <em>(July 2012)</em> 165 </p> 166 167 <div class="toggle-content-toggleme"> 168 169 <p>Maintenance update. The system version is 4.1.1.</p> 170 <dl> 171 <dt>Dependencies:</dt> 172 <dd>SDK Tools r20 or higher is required.</dd> 173 </dl> 174 175 </div> 176</div> 177 178<div class="toggle-content closed" > 179 180 <p><a href="#" onclick="return toggleContent(this)"> 181 <img src="{@docRoot}assets/images/triangle-closed.png" 182class="toggle-content-img" alt="" />Revision 1</a> <em>(June 2012)</em> 183 </p> 184 185 <div class="toggle-content-toggleme"> 186 187 <p>Initial release. The system version is 4.1.0.</p> 188 <dl> 189 <dt>Dependencies:</dt> 190 <dd>SDK Tools r20 or higher is required.</dd> 191 </dl> 192 193 </div> 194</div> 195 196<h3>Emulator Skins</h3> 197 198<p>The downloadable platform includes the following emulator skins:</p> 199 200<ul> 201 <li> 202 QVGA (240x320, low density, small screen) 203 </li> 204 <li> 205 WQVGA400 (240x400, low density, normal screen) 206 </li> 207 <li> 208 WQVGA432 (240x432, low density, normal screen) 209 </li> 210 <li> 211 HVGA (320x480, medium density, normal screen) 212 </li> 213 <li> 214 WVGA800 (480x800, high density, normal screen) 215 </li> 216 <li> 217 WVGA854 (480x854 high density, normal screen) 218 </li> 219 <li> 220 WXGA720 (1280x720, extra-high density, normal screen) 221 </li> 222 <li> 223 WSVGA (1024x600, medium density, large screen) 224 </li> 225 <li> 226 WXGA800-7in (1280x800, high density, large screen) <span class="new">new</span> 227 </li> 228 <li> 229 WXGA800 (1280x800, medium density, xlarge screen) 230 </li> 231</ul> 232 233<p>To test your application on an emulator that represents the <a 234href="http://play.google.com/nexus7">Nexus 7</a> tablet device, you can create an AVD with 235the new WXGA800-7in skin. For best performance, make sure to enable <a 236href="{@docRoot}tools/devices/emulator.html#accel-graphics">graphics acceleration</a> in the 237emulator configuration.</p> 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252<h2 id="4.0.3">Android 4.0.3</h2> 253 254 255<p class="caution"><strong>Important:</strong> To download the new Android 2564.0.x system components from the Android SDK Manager, you must first update the 257SDK tools to revision 14 or later and restart the Android SDK Manager. If you do not, 258the Android 4.0.x system components will not be available for download.</p> 259 260<div class="toggle-content closed"> 261 262 <p><a href="#" onclick="return toggleContent(this)"> 263 <img src="{@docRoot}assets/images/triangle-closed.png" 264class="toggle-content-img" alt="" />Revision 3</a> <em>(March 2012)</em> 265 </p> 266 267 <div class="toggle-content-toggleme"> 268 269 <p>Maintenance update. The system version is 4.0.4.</p> 270 <p class="note"><strong>Note:</strong> This system image includes support for emulator 271hardware graphics acceleration when used with SDK Tools r17 or higher. 272(<a href="{@docRoot}tools/devices/emulator.html#accel-graphics">more info</a>)</p> 273 <dl> 274 <dt>Dependencies:</dt> 275 <dd>SDK Tools r17 or higher is required.</dd> 276 </dl> 277 278 </div> 279</div> 280 281<div class="toggle-content closed" > 282 283 <p><a href="#" onclick="return toggleContent(this)"> 284 <img src="{@docRoot}assets/images/triangle-closed.png" 285class="toggle-content-img" alt="" />Revision 2</a> <em>(January 2012)</em> 286 </p> 287 288 <div class="toggle-content-toggleme"> 289 290 <p>Maintenance update. The system version is 4.0.3.</p> 291 <dl> 292 <dt>Dependencies:</dt> 293 <dd>SDK Tools r14 or higher is required.</dd> 294 </dl> 295 296 </div> 297</div> 298 299<div class="toggle-content closed" > 300 301 <p><a href="#" onclick="return toggleContent(this)"> 302 <img src="{@docRoot}assets/images/triangle-closed.png" 303class="toggle-content-img" alt="" />Revision 1</a> <em>(December 2011)</em> 304 </p> 305 306 <div class="toggle-content-toggleme"> 307 308 <p>Initial release. The system version is 4.0.3.</p> 309 <dl> 310 <dt>Dependencies:</dt> 311 <dd>SDK Tools r14 or higher is required.</dd> 312 </dl> 313 314 </div> 315</div> 316 317<h3>Emulator Skins</h3> 318 319<p>The downloadable platform includes the following emulator skins:</p> 320 321<ul> 322 <li> 323 QVGA (240x320, low density, small screen) 324 </li> 325 <li> 326 WQVGA400 (240x400, low density, normal screen) 327 </li> 328 <li> 329 WQVGA432 (240x432, low density, normal screen) 330 </li> 331 <li> 332 HVGA (320x480, medium density, normal screen) 333 </li> 334 <li> 335 WVGA800 (480x800, high density, normal screen) 336 </li> 337 <li> 338 WVGA854 (480x854 high density, normal screen) 339 </li> 340 <li> 341 WXGA720 (1280x720, extra-high density, normal screen) 342 </li> 343 <li> 344 WSVGA (1024x600, medium density, large screen) 345 </li> 346 <li> 347 WXGA (1280x800, medium density, xlarge screen) 348 </li> 349</ul> 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366<h2 id="4.0">Android 4.0</h2> 367 368 369<div class="toggle-content closed"> 370 371 <p><a href="#" onclick="return toggleContent(this)"> 372 <img src="{@docRoot}assets/images/triangle-closed.png" 373class="toggle-content-img" alt="" />Android 4.0, Revision 2</a> <em>(December 2011)</em> 374 </p> 375 376 <div class="toggle-content-toggleme"> 377 <p>Maintenance update. The system version is 4.0.2.</p> 378 <dl> 379 <dt>Dependencies:</dt> 380 <dd>SDK Tools r14 or higher is required.</dd> 381 </dl> 382 </div> 383</div> 384 385<div class="toggle-content closed"> 386 387 <p><a href="#" onclick="return toggleContent(this)"> 388 <img src="{@docRoot}assets/images/triangle-closed.png" 389class="toggle-content-img" alt="" />Android 4.0, Revision 1</a> <em>(October 2011)</em> 390 </p> 391 392 <div class="toggle-content-toggleme"> 393 <p>Initial release. The system version is 4.0.1.</p> 394 <dl> 395 <dt>Dependencies:</dt> 396 <dd>SDK Tools r14 or higher is required.</dd> 397 </dl> 398 </div> 399</div> 400 401 402<h3>Emulator Skins</h3> 403 404<p>The downloadable platform includes the following emulator skins:</p> 405 406<ul> 407 <li> 408 QVGA (240x320, low density, small screen) 409 </li> 410 <li> 411 WQVGA400 (240x400, low density, normal screen) 412 </li> 413 <li> 414 WQVGA432 (240x432, low density, normal screen) 415 </li> 416 <li> 417 HVGA (320x480, medium density, normal screen) 418 </li> 419 <li> 420 WVGA800 (480x800, high density, normal screen) 421 </li> 422 <li> 423 WVGA854 (480x854 high density, normal screen) 424 </li> 425 <li> 426 WXGA720 (1280x720, extra-high density, normal screen) <span class="new">new</span> 427 </li> 428 <li> 429 WSVGA (1024x600, medium density, large screen) <span class="new">new</span> 430 </li> 431 <li> 432 WXGA (1280x800, medium density, xlarge screen) 433 </li> 434</ul> 435 436<p>To test your application on an emulator that represents the latest Android device, you can create 437an AVD with the new WXGA720 skin (it's an xhdpi, normal screen device). Note that the emulator 438currently doesn't support the new on-screen navigation bar for devices without hardware navigation 439buttons, so when using this skin, you must use keyboard keys <em>Home</em> for the Home button, 440<em>ESC</em> for the Back button, and <em>F2</em> or <em>Page-up</em> for the Menu button.</p> 441 442<p>However, due to performance issues in the emulator when running high-resolution screens such as 443the one for the WXGA720 skin, we recommend that you primarily use the traditional WVGA800 skin 444(hdpi, normal screen) to test your application.</p> 445 446 447 448 449 450 451 452 453 454 455 456 457 458<h2 id="3.2">Android 3.2</h2> 459 460 461 462<div class="toggle-content closed"> 463 464 <p><a href="#" onclick="return toggleContent(this)"> 465 <img src="{@docRoot}assets/images/triangle-closed.png" 466class="toggle-content-img" alt="" />Android 3.2, Revision 1</a> <em>(July 2011)</em> 467 </p> 468 469 <div class="toggle-content-toggleme"> 470 471<dl> 472<dt>Initial release. SDK Tools r12 or higher is recommended.</dt> 473</dl> 474 475 </div> 476</div> 477 478 479 480 481<h3>Emulator Skins</h3> 482 483<p>The downloadable platform includes the following emulator skin:</p> 484 485<ul> 486 <li> 487 WXGA (1280x800, medium density, xlarge screen) 488 </li> 489</ul> 490 491<p>For more information about how to develop an application that displays 492and functions properly on all Android-powered devices, see <a 493href="{@docRoot}guide/practices/screens_support.html">Supporting Multiple 494Screens</a>.</p> 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513<h2 id="3.1">Android 3.1</h2> 514 515 516<div class="toggle-content closed"> 517 518<p><a href="#" onclick="return toggleContent(this)"> 519 <img src="{@docRoot}assets/images/triangle-closed.png" 520class="toggle-content-img" alt="" />Android 3.1, Revision 3</a> <em>(July 2011)</em> 521</p> 522 523<div class="toggle-content-toggleme"> 524 525<dl> 526<dt>Dependencies:</dt> 527<dd> 528<p>Requires <a href="{@docRoot}tools/sdk/tools-notes.html">SDK Tools r12</a> or 529higher.</p> 530</dd> 531<dt>Notes:</dt> 532<dd> 533<p>Improvements to the platform's rendering library to support the visual layout editor in the ADT 534Eclipse plugin. This revision allows for more drawing features in ADT and fixes several 535bugs in the previous rendering library. It also unlocks several editor features that were added in 536ADT 12.</p> 537</dd> 538</dl> 539 540</div> 541</div> 542 543 544<div class="toggle-content closed" > 545 546<p><a href="#" onclick="return toggleContent(this)"> 547 <img src="{@docRoot}assets/images/triangle-closed.png" 548class="toggle-content-img" alt="" />Android 3.1, Revision 2</a> <em>(May 2011)</em> 549</p> 550 551<div class="toggle-content-toggleme"> 552 553<dl> 554<dt>Dependencies:</dt> 555<dd> 556<p>Requires <a href="{@docRoot}tools/sdk/tools-notes.html">SDK Tools r11</a> or 557higher.</p> 558</dd> 559<dt>Notes:</dt> 560<dd> 561<p>Fixes an issue with the visual layout editor rendering library that prevented Android 3.1 from 562running in ADT.</p> 563</dd> 564</dl> 565 566</div> 567</div> 568 569 570<div class="toggle-content closed"> 571 572<p><a href="#" onclick="return toggleContent(this)"> 573 <img src="{@docRoot}assets/images/triangle-closed.png" 574class="toggle-content-img" alt="" />Android 3.1, Revision 1</a> <em>(May 2011)</em> 575</p> 576 577<div class="toggle-content-toggleme"> 578 579<dl> 580<dt>Dependencies:</dt> 581<dd> 582<p>Requires <a href="{@docRoot}tools/sdk/tools-notes.html">SDK Tools r11</a> or 583higher.</p> 584</dd> 585</dl> 586 587</div> 588</div> 589 590 591<h3>Emulator Skins</h3> 592 593<p>The downloadable platform includes the following emulator skin:</p> 594 595<ul> 596 <li> 597 WXGA (1280x800, medium density, xlarge screen) 598 </li> 599</ul> 600 601<p>For more information about how to develop an application that displays 602and functions properly on all Android-powered devices, see <a 603href="{@docRoot}guide/practices/screens_support.html">Supporting Multiple 604Screens</a>.</p> 605 606 607 608 609 610 611 612 613 614 615 616<h2 id="3.0">Android 3.0</h2> 617 618 619<div class="toggle-content closed" > 620 621<p><a href="#" onclick="return toggleContent(this)"> 622 <img src="{@docRoot}assets/images/triangle-closed.png" 623class="toggle-content-img" alt="" />Android 3.0, Revision 2</a> <em>(July 2011)</em> 624</p> 625 626<div class="toggle-content-toggleme"> 627 628<dl> 629<dt>Dependencies:</dt> 630<dd> 631<p>Requires <a href="{@docRoot}tools/sdk/tools-notes.html">SDK Tools r12</a> or 632higher.</p> 633</dd> 634<dt>Notes:</dt> 635<dd> 636<p>Improvements to the platform's rendering library to support the visual layout editor in the ADT 637Eclipse plugin. This revision allows for more drawing features in ADT and fixes several 638bugs in the previous rendering library. It also unlocks several editor features that were added in 639ADT 12.</p> 640</dd> 641</dl> 642 643</div> 644</div> 645 646<div class="toggle-content closed"> 647 648<p><a href="#" onclick="return toggleContent(this)"> 649 <img src="{@docRoot}assets/images/triangle-closed.png" class="toggle-content-img" 650 alt="" />Android 3.0, Revision 1</a> <em>(February 2011)</em> 651</p> 652 653<div class="toggle-content-toggleme"> 654 655<dl> 656<dt>Dependencies:</dt> 657<dd> 658<p>Requires <a href="{@docRoot}tools/sdk/tools-notes.html">SDK Tools r10</a> or higher.</p> 659</dd> 660</dl> 661 662</div> 663</div> 664 665 666 667<h3>Emulator Skins</h3> 668 669<p>The downloadable platform includes the following emulator skin:</p> 670 671<ul> 672 <li> 673 WXGA (1280x800, medium density, xlarge screen) 674 </li> 675</ul> 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694<h2 id="2.3.4">Android 2.3.4</h2> 695 696 697 698<p>The sections below provide notes about successive releases of 699the Android 2.3.4 platform component for the Android SDK, as denoted by 700revision number. To determine what revision(s) of the Android 7012.3.4 platforms are installed in your SDK environment, refer to 702the "Installed Packages" listing in the Android SDK and AVD Manager.</p> 703 704<div class="toggle-content closed" > 705 706<p><a href="#" onclick="return toggleContent(this)"> 707 <img src="{@docRoot}assets/images/triangle-closed.png" class="toggle-content-img" 708 alt="" />Android 2.3.4, Revision 1</a> <em>(May 2011)</em> 709</p> 710 711 <div class="toggle-content-toggleme"> 712 <dl> 713 <dt>Dependencies:</dt> 714 <dd> 715 <p>Requires SDK Tools r11 or higher.</p> 716 </dd> 717 </dl> 718 </div> 719</div> 720 721 722<h3>Emulator Skins</h3> 723 724<p>The downloadable platform includes a set of emulator skins that you can use 725for modeling your application in different screen sizes and resolutions. The 726emulator skins are:</p> 727 728<ul> 729 <li> 730 QVGA (240x320, low density, small screen) 731 </li> 732 <li> 733 WQVGA400 (240x400, low density, normal screen) 734 </li> 735 <li> 736 WQVGA432 (240x432, low density, normal screen) 737 </li> 738 <li> 739 HVGA (320x480, medium density, normal screen) 740 </li> 741 <li> 742 WVGA800 (480x800, high density, normal screen) 743 </li> 744 <li> 745 WVGA854 (480x854 high density, normal screen) 746 </li> 747</ul> 748 749 750 751 752 753 754 755 756 757 758 759 760 761<h2 id="2.3.3">Android 2.3.3</h2> 762 763 764<div class="toggle-content closed" > 765 766<p><a href="#" onclick="return toggleContent(this)"> 767 <img src="{@docRoot}assets/images/triangle-closed.png" 768class="toggle-content-img" alt="" />Android 2.3.3, Revision 2</a> <em>(July 2011)</em> 769</p> 770 771<div class="toggle-content-toggleme"> 772 773<dl> 774<dt>Dependencies:</dt> 775<dd> 776<p>Requires <a href="{@docRoot}tools/sdk/tools-notes.html">SDK Tools r12</a> or 777higher.</p> 778</dd> 779<dt>Notes:</dt> 780<dd> 781<p>Improvements to the platform's rendering library to support the visual layout editor in the ADT 782Eclipse plugin. This revision allows for more drawing features in ADT and fixes several 783bugs in the previous rendering library. It also unlocks several editor features that were added in 784ADT 12.</p> 785</dd> 786</dl> 787 788</div> 789</div> 790 791<div class="toggle-content closed" > 792 793<p><a href="#" onclick="return toggleContent(this)"> 794 <img src="{@docRoot}assets/images/triangle-closed.png" 795class="toggle-content-img" alt="" />Android 2.3.3, Revision 1</a> <em>(February 2011)</em> 796</p> 797 798<div class="toggle-content-toggleme"> 799<dl> 800<dt>Dependencies:</dt> 801<dd> 802<p>Requires SDK Tools r9 or higher.</p> 803</dd> 804</dl> 805 806</div> 807</div> 808 809 810<h3>Emulator Skins</h3> 811 812<p>The downloadable platform includes a set of emulator skins that you can use 813for modeling your application in different screen sizes and resolutions. The 814emulator skins are:</p> 815 816<ul> 817 <li> 818 QVGA (240x320, low density, small screen) 819 </li> 820 <li> 821 WQVGA400 (240x400, low density, normal screen) 822 </li> 823 <li> 824 WQVGA432 (240x432, low density, normal screen) 825 </li> 826 <li> 827 HVGA (320x480, medium density, normal screen) 828 </li> 829 <li> 830 WVGA800 (480x800, high density, normal screen) 831 </li> 832 <li> 833 WVGA854 (480x854 high density, normal screen) 834 </li> 835</ul> 836 837 838 839 840 841 842 843 844 845 846 847 848<h2 id="2.3">Android 2.3</h2> 849 850 851 852<p>The sections below provide notes about successive releases of 853the Android 2.3 platform component for the Android SDK, as denoted by 854revision number. To determine what revision(s) of the Android 8552.3 platforms are installed in your SDK environment, refer to 856the "Installed Packages" listing in the Android SDK and AVD Manager.</p> 857 858 859<div class="toggle-content closed" > 860 861<p><a href="#" onclick="return toggleContent(this)"> 862 <img src="{@docRoot}assets/images/triangle-closed.png" class="toggle-content-img" 863 alt="" />Android 2.3, Revision 1</a> <em>(December 2010)</em> 864</p> 865 866 <div class="toggle-content-toggleme"> 867 <dl> 868 <dt>Dependencies:</dt> 869 <dd> 870 <p>Requires SDK Tools r8 or higher.</p> 871 </dd> 872 </dl> 873 </div> 874</div> 875 876 877<h3>Emulator Skins</h3> 878 879<p>The downloadable platform includes a set of emulator skins that you can use 880for modeling your application in different screen sizes and resolutions. The 881emulator skins are:</p> 882 883<ul> 884 <li> 885 QVGA (240x320, low density, small screen) 886 </li> 887 <li> 888 WQVGA400 (240x400, low density, normal screen) 889 </li> 890 <li> 891 WQVGA432 (240x432, low density, normal screen) 892 </li> 893 <li> 894 HVGA (320x480, medium density, normal screen) 895 </li> 896 <li> 897 WVGA800 (480x800, high density, normal screen) 898 </li> 899 <li> 900 WVGA854 (480x854 high density, normal screen) 901 </li> 902</ul> 903 904 905 906 907 908 909 910 911 912<h2 id="2.2">Android 2.2</h2> 913 914 915<div class="toggle-content closed" > 916 917<p><a href="#" onclick="return toggleContent(this)"> 918 <img src="{@docRoot}assets/images/triangle-closed.png" 919class="toggle-content-img" alt="" />Android {@sdkPlatformVersion}, Revision 3</a> <em>(July 2011)</em> 920</p> 921 922<div class="toggle-content-toggleme"> 923 924<dl> 925<dt>Dependencies:</dt> 926<dd> 927<p>Requires <a href="{@docRoot}tools/sdk/tools-notes.html">SDK Tools r12</a> or 928higher.</p> 929</dd> 930<dt>Notes:</dt> 931<dd> 932<p>Improvements to the platform's rendering library to support the visual layout editor in the ADT 933Eclipse plugin. This revision allows for more drawing features in ADT and fixes several 934bugs in the previous rendering library. It also unlocks several editor features that were added in 935ADT 12.</p> 936</dd> 937</dl> 938 939</div> 940</div> 941 942<div class="toggle-content closed" > 943 944<p><a href="#" onclick="return toggleContent(this)"> 945 <img src="{@docRoot}assets/images/triangle-closed.png" 946class="toggle-content-img" alt="" />Android {@sdkPlatformVersion}, Revision 2</a> <em>(July 2010)</em> 947</p> 948 949<div class="toggle-content-toggleme"> 950<dt>Dependencies:</dt> 951<dd> 952<p>Requires SDK Tools r6 or higher.</p> 953</dd> 954 955<dt>System Image:</dt> 956<dd> 957<ul> 958<li>Adds default Search Widget.</li> 959<li>Includes proper provisioning for the platform's Backup Manager. For more information about how 960to use the Backup Manager, see <a href="{@docRoot}guide/topics/data/backup.html">Data 961Backup</a>.</li> 962<li>Updates the Android 2.2 system image to FRF91.</li> 963</ul> 964</dd> 965 966</dl> 967 </div> 968</div> 969 970<div class="toggle-content closed"> 971 972<p><a href="#" onclick="return toggleContent(this)"> 973 <img src="{@docRoot}assets/images/triangle-closed.png" 974class="toggle-content-img" alt="" />Android {@sdkPlatformVersion}, Revision 1</a> <em>(May 2010)</em></p> 975 976<div class="toggle-content-toggleme"> 977<dl> 978<dt>Dependencies:</dt> 979<dd> 980<p>Requires SDK Tools r6 or higher.</p> 981</dd> 982 983<dt>Tools:</dt> 984<dd> 985<p>Adds support for building with Android library projects. See <a href="{@docRoot}tools/sdk/tools-notes.html">SDK 986Tools, r6</a> for information.</p> 987</dd> 988 989</dl> 990 </div> 991</div> 992 993 994<h3>Emulator Skins</h3> 995 996<p>The downloadable platform includes a set of emulator skins that you can use 997for modeling your application in different screen sizes and resolutions. The 998emulator skins are:</p> 999 1000<ul> 1001 <li> 1002 QVGA (240x320, low density, small screen) 1003 </li> 1004 <li> 1005 WQVGA (240x400, low density, normal screen) 1006 </li> 1007 <li> 1008 FWQVGA (240x432, low density, normal screen) 1009 </li> 1010 <li> 1011 HVGA (320x480, medium density, normal screen) 1012 </li> 1013 <li> 1014 WVGA800 (480x800, high density, normal screen) 1015 </li> 1016 <li> 1017 WVGA854 (480x854 high density, normal screen) 1018 </li> 1019</ul>
