1 page.title= 2 parent.title= 3 parent.link=activities.html 4 @jd:body 5 6 <div id="qv-wrapper"> 7 <div id="qv"> 8 9 <h2> </h2> 10 <ol> 11 <li><a href="#ActivityState"> </a></li></li> 12 <li><a href="#ManagingTasks"> </a> 13 <ol> 14 <li><a href="#TaskLaunchModes"> </a></li> 15 <li><a href="#Affinities"> </a></li> 16 <li><a href="#Clearing"> </a></li> 17 <li><a href="#Starting"> </a></li> 18 </ol> 19 </li> 20 </ol> 21 22 <h2></h2> 23 <ol> 24 <li><a href="http://android-developers.blogspot.com/2010/04/multitasking-android-way.html"> 25 Android</a></li> 26 </ol> 27 28 <h2>. :</h2> 29 <ol> 30 <li><a href="{@docRoot}design/patterns/navigation.html"> Android: 31 </a></li> 32 <li><a href="{@docRoot}guide/topics/manifest/activity-element.html"> 33 {@code <activity>}</a></li> 34 <li><a href="{@docRoot}guide/components/recents.html"> </a></li> 35 </ol> 36 </div> 37 </div> 38 39 40 <p> <a href="{@docRoot}guide/components/activities.html"></a>. 41 , , 42 . , . 43 , .</p> 44 45 <p> , . , 46 , 47 , , . 48 , , . , 49 , ( 50 , , ). 51 , , . 52 , Android 53 , <em></em>.</p> 54 55 <p> , 56 . (<em> </em>), 57 , .</p> 58 59 <!-- SAVE FOR WHEN THE FRAGMENT DOC IS ADDED 60 <div class="sidebox-wrapper"> 61 <div class="sidebox"> 62 <h3>Adding fragments to a task's back stack</h3> 63 64 <p>Your activity can also include {@link android.app.Fragment}s to the back stack. For example, 65 suppose you have a two-pane layout using fragments, one of which is a list view (fragment A) and the 66 other being a layout to display an item from the list (fragment B). When the user selects an item 67 from the list, fragment B is replaced by a new fragment (fragment C). In this case, it might be 68 desireable for the user to navigate back to reveal fragment B, using the <em>Back</em> button.</p> 69 <p>In order to add fragment B to the back stack so that this is possible, you must call {@link 70 android.app.FragmentTransaction#addToBackStack addToBackStack()} before you {@link 71 android.app.FragmentTransaction#commit()} the transaction that replaces fragment B with fragment 72 C.</p> 73 <p>For more information about using fragments and adding them to the back stack, see the {@link 74 android.app.Fragment} class documentation.</p> 75 76 </div> 77 </div> 78 --> 79 80 <p> . 81 82 ( ), . 83 ( ), 84 .</p> 85 86 <p> , 87 . , . 88 , . 89 <em></em>, 90 ( ) 91 ( ). 92 , 93 , <em></em>. , 94 95 . 1 96 : 97 .</p> 98 99 <img src="{@docRoot}images/fundamentals/diagram_backstack.png" alt="" /> 100 <p class="img-caption"><strong> 1.</strong> , 101 . <em></em>, 102 103 , .</p> 104 105 106 <p> <em></em>, , 107 108 , ( , 109 ). , .</p> 110 111 <div class="figure" style="width:287px"> 112 <img src="{@docRoot}images/fundamentals/diagram_multitasking.png" alt="" /> <p 113 class="img-caption"><strong> 2.</strong> : B 114 , A , .</p> 115 </div> 116 <div class="figure" style="width:215px"> 117 <img src="{@docRoot}images/fundamentals/diagram_multiple_instances.png" alt="" /> <p 118 class="img-caption"><strong> 3.</strong> .</p> 119 </div> 120 121 <p> , , 122 <em></em>. 123 124 , . 125 , 2. , 126 . , , ( A) 127 . <em></em>, 128 129 . , A 130 . , 131 ( B) . 132 133 A. A 134 , , 135 . 136 B, , 137 ( 138 <a href="{@docRoot}guide/components/recents.html"> </a>). 139 Android.</p> 140 141 <p class="note"><strong>.</strong> . 142 , , 143 , . 144 . <a href="#ActivityState"> </a>.</p> 145 146 <p> , 147 , 148 ( 149 ). , 150 ( ), 3. , 151 <em></em>, , 152 ( 153 ). , , 154 . <a href="#ManagingTasks"> </a> .</p> 155 156 157 <p> :</p> 158 159 <ul> 160 <li> A B, A , 161 (, , ). 162 <em></em> B, A 163 .</li> 164 <li> <em></em>, 165 166 . . 167 , , 168 .</li> 169 <li> <em></em>, 170 171 . . , 172 <em></em> .</li> 173 <li> , .</li> 174 </ul> 175 176 177 <div class="note design"> 178 <p><strong> </strong></p> 179 <p> Android, <a href="{@docRoot}design/patterns/navigation.html"></a> Android.</p> 180 </div> 181 182 183 <h2 id="ActivityState"> </h2> 184 185 <p> , , 186 . , , 187 . <strong></strong> 188 189 .</p> 190 191 <p> (, 192 ), , 193 . , . , 194 195 , , 196 , ( ). 197 , 198 {@link android.app.Activity#onSaveInstanceState onSaveInstanceState()} 199 .</p> 200 201 <p> . 202 <a href="{@docRoot}guide/components/activities.html#SavingActivityState"></a>.</p> 203 204 205 206 <h2 id="ManagingTasks"> </h2> 207 208 <p> , Android , , 209 , 210 , 211 . , 212 . , , 213 ( ), 214 ( 215 ), 216 , .</p> 217 218 <p> 219 <a href="{@docRoot}guide/topics/manifest/activity-element.html">{@code <activity>}</a> 220 , 221 {@link android.app.Activity#startActivity startActivity()}.</p> 222 223 <p> <a href="{@docRoot}guide/topics/manifest/activity-element.html"> 224 {@code <activity>}</a>, , :</p> 225 226 <ul class="nolist"> 227 <li><a href="{@docRoot}guide/topics/manifest/activity-element.html#aff"> 228 {@code taskAffinity}</a></li> 229 <li><a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode"> 230 {@code launchMode}</a></li> 231 <li><a href="{@docRoot}guide/topics/manifest/activity-element.html#reparent"> 232 {@code allowTaskReparenting}</a></li> 233 <li><a href="{@docRoot}guide/topics/manifest/activity-element.html#clear"> 234 {@code clearTaskOnLaunch}</a></li> 235 <li><a href="{@docRoot}guide/topics/manifest/activity-element.html#always"> 236 {@code alwaysRetainTaskState}</a></li> 237 <li><a href="{@docRoot}guide/topics/manifest/activity-element.html#finish"> 238 {@code finishOnTaskLaunch}</a></li> 239 </ul> 240 241 <p> , , :</p> 242 243 <ul class="nolist"> 244 <li>{@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK}</li> 245 <li>{@link android.content.Intent#FLAG_ACTIVITY_CLEAR_TOP}</li> 246 <li>{@link android.content.Intent#FLAG_ACTIVITY_SINGLE_TOP}</li> 247 </ul> 248 249 <p> , 250 .</p> 251 252 <p> , 253 . . 254 <a href="{@docRoot}guide/components/recents.html"> </a>. 255 . .</p> 256 257 <p class="caution"><strong>!</strong> 258 . , 259 , 260 <em></em>. 261 , , .</p> 262 263 264 <h3 id="TaskLaunchModes"> </h3> 265 266 <p> 267 . :</p> 268 <ul class="nolist"> 269 <li><a href="#ManifestForTasks"> </a> 270 <p> , , 271 .</li> 272 <li><a href="#IntentFlagsForTasks"> </a> 273 <p> {@link android.app.Activity#startActivity startActivity()}, 274 {@link android.content.Intent}, , 275 ( ).</p></li> 276 </ul> 277 278 <p> , A B, B , 279 ( ), A , B 280 . , B 281 , A ( ) 282 B ( ).</p> 283 284 <p class="note"><strong>.</strong> , , 285 , , , 286 , .</p> 287 288 289 <h4 id="ManifestForTasks"> </h4> 290 291 <p> , 292 <a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode">{@code 293 launchMode}</a> 294 <a href="{@docRoot}guide/topics/manifest/activity-element.html">{@code <activity>}</a>.</p> 295 296 <p> <a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode">{@code 297 launchMode}</a> 298 . , 299 300 <code><a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode">launchMode</a></code>:</p> 301 302 <dl> 303 <dt>{@code "standard"} ( )</dt> 304 <dd> . , 305 , . , 306 , .</dd> 307 <dt>{@code "singleTop"}</dt> 308 <dd> , 309 {@link 310 android.app.Activity#onNewIntent onNewIntent()}, 311 . , 312 , ( 313 <em></em> ). 314 <p>, A B, C 315 D ( A-B-C-D D ). D. 316 D {@code "standard"} , 317 A-B-C-D-D. , D {@code "singleTop"}, 318 D {@link 319 android.app.Activity#onNewIntent onNewIntent()}, 320 A-B-C-D. , B, 321 B, {@code "singleTop"}.</p> 322 <p class="note"><strong>.</strong> , 323 <em></em> . 324 325 , <em></em> 326 327 {@link android.app.Activity#onNewIntent 328 onNewIntent()}.</p> 329 </dd> 330 331 <dt>{@code "singleTask"}</dt> 332 <dd> . 333 , , 334 {@link 335 android.app.Activity#onNewIntent onNewIntent()}, . 336 . 337 <p class="note"><strong>.</strong> , 338 <em></em> .</p></dd> 339 <dt>{@code "singleInstance"}.</dt> 340 <dd> , {@code "singleTask"}, 341 , . ; 342 , , .</dd> 343 </dl> 344 345 346 <p> : Android Browser , - 347 {@code singleTask} <a href="{@docRoot}guide/topics/manifest/activity-element.html">{@code <activity>}</a>. 348 , 349 Android Browser, <em></em> 350 , . , , , 351 , , 352 .</p> 353 354 <p> , , 355 <em></em> . , 356 , {@code singleTask}, , 357 . 358 , , 359 . 4 .</p> 360 361 <img src="{@docRoot}images/fundamentals/diagram_backstack_singletask_multiactivity.png" alt="" /> 362 <p class="img-caption"><strong>4.</strong> , 363 singleTask . 364 , , 365 .</p> 366 367 <p> . 368 <code><a href="{@docRoot}guide/topics/manifest/activity-element.html"><activity></a></code>, 369 {@code launchMode} 370 .</p> 371 372 <p class="note"><strong>.</strong> , <a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode">{@code launchMode}</a>, 373 , , , 374 .</p> 375 376 377 378 <h4 id="#IntentFlagsForTasks"> </h4> 379 380 <p> 381 , {@link 382 android.app.Activity#startActivity startActivity()}. 383 :</p> 384 385 <p> 386 <dt>{@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK}</dt> 387 <dd> . , 388 , , , 389 {@link android.app.Activity#onNewIntent onNewIntent()}. 390 <p> , <a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode">{@code launchMode}</a> {@code "singleTask"}, 391 .</p></dd> 392 <dt>{@link android.content.Intent#FLAG_ACTIVITY_SINGLE_TOP}</dt> 393 <dd> ( ), 394 {@link android.app.Activity#onNewIntent onNewIntent()} , 395 . 396 <p> , <a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode">{@code launchMode}</a> {@code "singleTop"}, 397 .</p></dd> 398 <dt>{@link android.content.Intent#FLAG_ACTIVITY_CLEAR_TOP}</dt> 399 <dd> , 400 , 401 , ( ) 402 {@link android.app.Activity#onNewIntent onNewIntent()}). 403 <p> 404 <a href="{@docRoot}guide/topics/manifest/activity-element.html#lmode">{@code launchMode}</a>.</p> 405 <p> {@code FLAG_ACTIVITY_CLEAR_TOP} 406 {@code FLAG_ACTIVITY_NEW_TASK}. 407 408 , . </p> 409 <p class="note"><strong>.</strong> 410 {@code "standard"}, 411 , 412 . {@code "standard"} 413 . </p> 414 </dd> 415 </dl> 416 417 418 419 420 421 <h3 id="Affinities"> </h3> 422 423 <p><em></em> . 424 . 425 . 426 . , 427 , ; , , 428 .</p> 429 430 <p> 431 <a href="{@docRoot}guide/topics/manifest/activity-element.html#aff">{@code taskAffinity}</a> 432 <a href="{@docRoot}guide/topics/manifest/activity-element.html">{@code <activity>}</a>.</p> 433 434 <p> <a href="{@docRoot}guide/topics/manifest/activity-element.html#aff">{@code taskAffinity}</a> 435 , , 436 <a href="{@docRoot}guide/topics/manifest/manifest-element.html"> 437 {@code <manifest>} 438 </a>, 439 .</p> 440 441 <p> :</p> 442 <ul> 443 <li> , 444 , 445 {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK}. 446 447 <p> , 448 {@link android.app.Activity#startActivity startActivity()}. 449 , . , , 450 {@link android.app.Activity#startActivity startActivity()}, 451 {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK}, 452 . . 453 . , 454 , . , .</p> 455 456 <p> , , <em></em> 457 , 458 , . ( 459 ) , , 460 {@code FLAG_ACTIVITY_NEW_TASK} , 461 {@link android.app.Activity#startActivity startActivity()}. 462 , 463 , , , 464 , , ( 465 {@link android.content.Intent#CATEGORY_LAUNCHER}; . <a href="#Starting"> </a> ).</p> 466 </li> 467 468 <li> <a href="{@docRoot}guide/topics/manifest/activity-element.html#reparent"> 469 {@code allowTaskReparenting}</a> {@code "true"}. 470 <p> , , 471 .</p> 472 <p>, , , 473 . , 474 ( ), . 475 , 476 , . , , 477 .</p> 478 </li> 479 </ul> 480 481 <p class="note"><strong>.</strong> {@code .apk} 482 , , , <a href="{@docRoot}guide/topics/manifest/activity-element.html#aff">{@code taskAffinity}</a> 483 , .</p> 484 485 486 487 <h3 id="Clearing"> </h3> 488 489 <p> , , 490 . , . 491 , , 492 , , - . </p> 493 494 <p> , : </p> 495 496 <dl> 497 <dt><code><a 498 href="{@docRoot}guide/topics/manifest/activity-element.html#always">alwaysRetainTaskState</a></code> 499 </dt> 500 <dd> {@code "true"} , 501 . 502 .</dd> 503 504 <dt><code><a 505 href="{@docRoot}guide/topics/manifest/activity-element.html#clear">clearTaskOnLaunch</a></code></dt> 506 <dd> {@code "true"} , 507 , 508 . , 509 <a href="{@docRoot}guide/topics/manifest/activity-element.html#always"> 510 {@code alwaysRetainTaskState}</a>. 511 , .</dd> 512 513 <dt><code><a 514 href="{@docRoot}guide/topics/manifest/activity-element.html#finish">finishOnTaskLaunch</a></code> 515 </dt> 516 <dd> <a href="{@docRoot}guide/topics/manifest/activity-element.html#clear">{@code clearTaskOnLaunch}</a>, 517 518 , . , 519 . {@code "true"}, 520 . 521 , , .</dd> 522 </dl> 523 524 525 526 527 <h3 id="Starting"> </h3> 528 529 <p> , 530 {@code "android.intent.action.MAIN"} 531 {@code "android.intent.category.LAUNCHER"} 532 . :</p> 533 534 <pre> 535 <activity ... > 536 <intent-filter ... > 537 <action android:name="android.intent.action.MAIN" /> 538 <category android:name="android.intent.category.LAUNCHER" /> 539 </intent-filter> 540 ... 541 </activity> 542 </pre> 543 544 <p> , 545 , 546 . 547 </p> 548 549 <p> : 550 . <a href="#LaunchModes"> 551 </a>, , , {@code "singleTask"} 552 {@code "singleInstance"}, , 553 {@link android.content.Intent#ACTION_MAIN} 554 {@link android.content.Intent#CATEGORY_LAUNCHER}. , , , 555 : {@code "singleTask"}, 556 , . 557 <em></em>. . 558 , .</p> 559 560 <p> , , , 561 <a href="{@docRoot}guide/topics/manifest/activity-element.html#finish">{@code finishOnTaskLaunch}</a> 562 563 <code><a href="{@docRoot}guide/topics/manifest/activity-element.html"><activity></a></code> 564 {@code "true"} (. <a href="#Clearing"> </a>).</p> 565 566 <p> 567 . <a href="{@docRoot}guide/components/recents.html"> 568 </a>.</p> 569 570 <!-- 571 <h2>Beginner's Path</h2> 572 573 <p>For more information about how to use intents to 574 activate other application components and publish the intents to which your components 575 respond, continue with the <b><a 576 href="{@docRoot}guide/components/intents-filters.html">Intents and Intent 577 Filters</a></b> document.</p> 578 --> 579
