1 page.title= 2 page.tags=lifecycle,background 3 4 @jd:body 5 6 <div id="qv-wrapper"> 7 <div id="qv"> 8 9 <h2></h2> 10 <ol> 11 <li><a href="#Processes"></a> 12 <ol> 13 <li><a href="#Lifecycle"></a></li> 14 </ol> 15 </li> 16 <li><a href="#Threads"></a> 17 <ol> 18 <li><a href="#WorkerThreads"> </a></li> 19 <li><a href="#ThreadSafe"> </a></li> 20 </ol> 21 </li> 22 <li><a href="#IPC">IPC</a></li> 23 </ol> 24 25 </div> 26 </div> 27 28 <p> Android Linux 29 30 31 32 33 34 35 </p> 36 37 <p>Android </p> 38 39 40 <h2 id="Processes"></h2> 41 42 <p> 43 44 </p> 45 46 <p> <a href="{@docRoot}guide/topics/manifest/activity-element.html">{@code 47 <activity>}</a><a href="{@docRoot}guide/topics/manifest/service-element.html">{@code 48 <service>}</a><a href="{@docRoot}guide/topics/manifest/receiver-element.html">{@code 49 <receiver>}</a><a href="{@docRoot}guide/topics/manifest/provider-element.html">{@code 50 <provider>}</a> {@code android:process} — 51 — 52 {@code android:process} Linux ID 53 — 54 55 </p> 56 57 <p><a href="{@docRoot}guide/topics/manifest/application-element.html">{@code 58 <application>}</a> {@code android:process} 59 </p> 60 61 <p>Android 62 63 64 </p> 65 66 <p>Android 67 68 69 70 </p> 71 72 73 <h3 id="Lifecycle"></h3> 74 75 <p>Android 76 77 78 79 80 81 </p> 82 83 <p> 5 1 <em></em><em></em> 84 85 </p> 86 87 <ol> 88 <li><b> </b> 89 <p> 90 </p> 91 92 <ul> 93 <li> {@link android.app.Activity} {@link 94 android.app.Activity} {@link android.app.Activity#onResume onResume()} 95 </li> 96 97 <li> {@link android.app.Service} 98 </li> 99 100 <li> {@link android.app.Service} {@link android.app.Service#startForeground startForeground()} — 101 102 103 <li>{@link android.app.Service#onCreate onCreate()}{@link android.app.Service#onStart 104 onStart()}{@link android.app.Service#onDestroy onDestroy()} {@link android.app.Service} 105 </li> 106 107 <li>{@link 108 android.content.BroadcastReceiver#onReceive onReceive()} {@link android.content.BroadcastReceiver} </li> 109 </ul> 110 111 <p>2~3 112 — 113 114 </p></li> 115 116 <li><b></b> 117 <p> 118 119 </p> 120 121 <ul> 122 <li> {@link android.app.Activity} {@link android.app.Activity#onPause onPause()} 123 124 125 </li> 126 127 <li> {@link android.app.Service} 128 </li> 129 </ul> 130 131 <p> 132 </p> 133 </li> 134 135 <li><b> </b> 136 <p>{@link 137 android.content.Context#startService startService()} 2 138 139 140 141 </p> 142 </li> 143 144 <li><b> </b> 145 <p> {@link android.app.Activity#onStop onStop()} 146 147 148 149 LRU 150 151 152 153 154 <a href="{@docRoot}guide/components/activities.html#SavingActivityState">Activities</a> 155 </p> 156 </li> 157 158 <li><b></b> 159 <p> 1 160 161 162 </p> 163 </li> 164 </ol> 165 166 167 <p>Android 168 169 </p> 170 171 <p> 172 — 173 A B A B A B 174 175 </p> 176 177 <p> <a href="{@docRoot}guide/components/services.html"></a> 178 179 180 181 182 183 184 </p> 185 186 187 188 189 <h2 id="Threads"></h2> 190 191 <p> 192 193 Android UI {@link 194 android.widget} {@link android.view} 195 UI 196 </p> 197 198 <p><em></em> UI 199 200 {@link android.view.View#onKeyDown onKeyDown()} UI 201 202 </p> 203 204 <p> UI 205 206 UI 207 </p> 208 209 <p> 210 UI UI 211 212 213 214 UI 5 <a href="http://developer.android.com/guide/practices/responsiveness.html"></a> 215 216 217 </p> 218 219 <p>Android UI <em></em> UI UI 220 — 221 Android 2 </p> 222 223 <ol> 224 <li>UI 225 <li>UI Android UI 226 </ol> 227 228 <h3 id="WorkerThreads"> </h3> 229 230 <p> UI UI 231 232 233 </p> 234 235 <p> {@link android.widget.ImageView} 236 </p> 237 238 <pre> 239 public void onClick(View v) { 240 new Thread(new Runnable() { 241 public void run() { 242 Bitmap b = loadImageFromNetwork("http://example.com/image.png"); 243 mImageView.setImageBitmap(b); 244 } 245 }).start(); 246 } 247 </pre> 248 249 <p> 250 <em>UI Android UI </em> 2 UI {@link 251 android.widget.ImageView} — 252 253 </p> 254 255 <p>Android UI 256 </p> 257 258 <ul> 259 <li>{@link android.app.Activity#runOnUiThread(java.lang.Runnable) 260 Activity.runOnUiThread(Runnable)}</li> 261 <li>{@link android.view.View#post(java.lang.Runnable) View.post(Runnable)}</li> 262 <li>{@link android.view.View#postDelayed(java.lang.Runnable, long) View.postDelayed(Runnable, 263 long)}</li> 264 </ul> 265 266 <p> {@link 267 android.view.View#post(java.lang.Runnable) View.post(Runnable)} </p> 268 269 <pre> 270 public void onClick(View v) { 271 new Thread(new Runnable() { 272 public void run() { 273 final Bitmap bitmap = loadImageFromNetwork("http://example.com/image.png"); 274 mImageView.post(new Runnable() { 275 public void run() { 276 mImageView.setImageBitmap(bitmap); 277 } 278 }); 279 } 280 }).start(); 281 } 282 </pre> 283 284 <p>{@link android.widget.ImageView} UI 285 </p> 286 287 <p> 288 {@link android.os.Handler} UI 289 290 {@link android.os.AsyncTask} UI 291 </p> 292 293 294 <h4 id="AsyncTask">AsyncTask </h4> 295 296 <p>{@link android.os.AsyncTask} 297 UI 298 </p> 299 300 <p>{@link android.os.AsyncTask} {@link 301 android.os.AsyncTask#doInBackground doInBackground()} 302 UI {@link 303 android.os.AsyncTask#onPostExecute onPostExecute()} {@link 304 android.os.AsyncTask#doInBackground doInBackground()} UI UI UI {@link android.os.AsyncTask#execute execute()} 305 306 </p> 307 308 <p> {@link android.os.AsyncTask} 309 </p> 310 311 <pre> 312 public void onClick(View v) { 313 new DownloadImageTask().execute("http://example.com/image.png"); 314 } 315 316 private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> { 317 /** The system calls this to perform work in a worker thread and 318 * delivers it the parameters given to AsyncTask.execute() */ 319 protected Bitmap doInBackground(String... urls) { 320 return loadImageFromNetwork(urls[0]); 321 } 322 323 /** The system calls this to perform work in the UI thread and delivers 324 * the result from doInBackground() */ 325 protected void onPostExecute(Bitmap result) { 326 mImageView.setImageBitmap(result); 327 } 328 } 329 </pre> 330 331 <p> UI UI 332 </p> 333 334 <p> {@link android.os.AsyncTask} 335 </p> 336 337 <ul> 338 <li> 339 </li> 340 <li>{@link android.os.AsyncTask#doInBackground doInBackground()} 341 </li> 342 <li>{@link android.os.AsyncTask#onPreExecute onPreExecute()}{@link 343 android.os.AsyncTask#onPostExecute onPostExecute()}{@link 344 android.os.AsyncTask#onProgressUpdate onProgressUpdate()} UI </li> 345 <li>{@link android.os.AsyncTask#doInBackground doInBackground()} {@link android.os.AsyncTask#onPostExecute onPostExecute()} 346 </li> 347 <li>{@link android.os.AsyncTask#publishProgress publishProgress()} {@link 348 android.os.AsyncTask#doInBackground doInBackground()} UI {@link 349 android.os.AsyncTask#onProgressUpdate onProgressUpdate()} </li> 350 <li></li> 351 </ul> 352 353 <p class="caution"><strong>:</strong> 1 <a href="{@docRoot}guide/topics/resources/runtime-changes.html"></a> 354 355 <a href="http://code.google.com/p/shelves/">Shelves</a> 356 357 </p> 358 359 360 <h3 id="ThreadSafe"> </h3> 361 362 <p> 363 </p> 364 365 <p><a href="{@docRoot}guide/components/bound-services.html"></a>—{@link android.os.IBinder} {@link android.os.IBinder IBinder} {@link android.os.IBinder 366 IBinder} UI 367 368 369 370 {@link android.app.Service#onBind onBind()} UI {@link android.app.Service#onBind 371 onBind()} RPC 372 373 374 {@link android.os.IBinder IBinder} {@link android.os.IBinder 375 IBinder} 376 </p> 377 378 <p> {@link android.content.ContentResolver} {@link android.content.ContentProvider} {@link 379 android.content.ContentProvider} {@link 380 android.content.ContentProvider#query query()} {@link android.content.ContentProvider#insert 381 insert()}{@link android.content.ContentProvider#delete delete()}{@link 382 android.content.ContentProvider#update update()}{@link android.content.ContentProvider#getType 383 getType()} UI 384 385 386 —— 387 </p> 388 389 390 <h2 id="IPC">IPC</h2> 391 392 <p>Android RPC 393 394 395 396 397 398 Android IPC RPC 399 </p> 400 401 <p>IPC {@link 402 android.content.Context#bindService bindService()} <a href="{@docRoot}guide/components/services.html"></a></p> 403 404 405 <!-- 406 <h2>Beginner's Path</h2> 407 408 <p>For information about how to perform work in the background for an indefinite period of time 409 (without a user interface), continue with the <b><a 410 href="{@docRoot}guide/components/services.html">Services</a></b> document.</p> 411 --> 412
