Alan Viverette | b6a2573 | 2017-11-21 14:49:24 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of 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, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server.am; |
| 18 | |
| 19 | import android.annotation.UiThread; |
| 20 | import android.content.Context; |
| 21 | import android.content.res.Configuration; |
| 22 | import android.os.Build; |
| 23 | import android.os.Handler; |
| 24 | import android.os.Looper; |
| 25 | import android.os.Message; |
| 26 | import android.util.AtomicFile; |
| 27 | import android.util.DisplayMetrics; |
| 28 | import android.util.Slog; |
| 29 | import android.util.Xml; |
| 30 | |
| 31 | import com.android.internal.util.FastXmlSerializer; |
| 32 | |
| 33 | import org.xmlpull.v1.XmlPullParser; |
| 34 | import org.xmlpull.v1.XmlPullParserException; |
| 35 | import org.xmlpull.v1.XmlSerializer; |
| 36 | |
| 37 | import java.io.File; |
| 38 | import java.io.FileInputStream; |
| 39 | import java.io.FileOutputStream; |
| 40 | import java.nio.charset.StandardCharsets; |
| 41 | import java.util.HashMap; |
| 42 | import java.util.Map; |
| 43 | |
| 44 | /** |
| 45 | * Manages warning dialogs shown during application lifecycle. |
| 46 | */ |
| 47 | class AppWarnings { |
| 48 | private static final String TAG = "AppWarnings"; |
| 49 | private static final String CONFIG_FILE_NAME = "packages-warnings.xml"; |
| 50 | |
| 51 | public static final int FLAG_HIDE_DISPLAY_SIZE = 0x01; |
| 52 | public static final int FLAG_HIDE_COMPILE_SDK = 0x02; |
| 53 | |
| 54 | private final HashMap<String, Integer> mPackageFlags = new HashMap<>(); |
| 55 | |
| 56 | private final ActivityManagerService mAms; |
| 57 | private final Context mUiContext; |
| 58 | private final ConfigHandler mAmsHandler; |
| 59 | private final UiHandler mUiHandler; |
| 60 | private final AtomicFile mConfigFile; |
| 61 | |
| 62 | private UnsupportedDisplaySizeDialog mUnsupportedDisplaySizeDialog; |
| 63 | private UnsupportedCompileSdkDialog mUnsupportedCompileSdkDialog; |
| 64 | |
| 65 | /** |
| 66 | * Creates a new warning dialog manager. |
| 67 | * <p> |
| 68 | * <strong>Note:</strong> Must be called from the ActivityManagerService thread. |
| 69 | * |
| 70 | * @param ams |
| 71 | * @param uiContext |
| 72 | * @param amsHandler |
| 73 | * @param uiHandler |
| 74 | * @param systemDir |
| 75 | */ |
| 76 | public AppWarnings(ActivityManagerService ams, Context uiContext, Handler amsHandler, |
| 77 | Handler uiHandler, File systemDir) { |
| 78 | mAms = ams; |
| 79 | mUiContext = uiContext; |
| 80 | mAmsHandler = new ConfigHandler(amsHandler.getLooper()); |
| 81 | mUiHandler = new UiHandler(uiHandler.getLooper()); |
| 82 | mConfigFile = new AtomicFile(new File(systemDir, CONFIG_FILE_NAME)); |
| 83 | |
| 84 | readConfigFromFileAmsThread(); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Shows the "unsupported display size" warning, if necessary. |
| 89 | * |
| 90 | * @param r activity record for which the warning may be displayed |
| 91 | */ |
| 92 | public void showUnsupportedDisplaySizeDialogIfNeeded(ActivityRecord r) { |
| 93 | final Configuration globalConfig = mAms.getGlobalConfiguration(); |
| 94 | if (globalConfig.densityDpi != DisplayMetrics.DENSITY_DEVICE_STABLE |
| 95 | && r.appInfo.requiresSmallestWidthDp > globalConfig.smallestScreenWidthDp) { |
| 96 | mUiHandler.showUnsupportedDisplaySizeDialog(r); |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Shows the "unsupported compile SDK" warning, if necessary. |
| 102 | * |
| 103 | * @param r activity record for which the warning may be displayed |
| 104 | */ |
| 105 | public void showUnsupportedCompileSdkDialogIfNeeded(ActivityRecord r) { |
| 106 | if (r.appInfo.compileSdkVersion == 0 || r.appInfo.compileSdkVersionCodename == null) { |
| 107 | // We don't know enough about this package. Abort! |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | // If the application was built against an pre-release SDK that's older than the current |
| 112 | // platform OR if the current platform is pre-release and older than the SDK against which |
| 113 | // the application was built OR both are pre-release with the same SDK_INT but different |
| 114 | // codenames (e.g. simultaneous pre-release development), then we're likely to run into |
| 115 | // compatibility issues. Warn the user and offer to check for an update. |
| 116 | final int compileSdk = r.appInfo.compileSdkVersion; |
| 117 | final int platformSdk = Build.VERSION.SDK_INT; |
| 118 | final boolean isCompileSdkPreview = !"REL".equals(r.appInfo.compileSdkVersionCodename); |
| 119 | final boolean isPlatformSdkPreview = !"REL".equals(Build.VERSION.CODENAME); |
| 120 | if ((isCompileSdkPreview && compileSdk < platformSdk) |
| 121 | || (isPlatformSdkPreview && platformSdk < compileSdk) |
| 122 | || (isCompileSdkPreview && isPlatformSdkPreview && platformSdk == compileSdk |
| 123 | && !Build.VERSION.CODENAME.equals(r.appInfo.compileSdkVersionCodename))) { |
| 124 | mUiHandler.showUnsupportedCompileSdkDialog(r); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Called when an activity is being started. |
| 130 | * |
| 131 | * @param r record for the activity being started |
| 132 | */ |
| 133 | public void onStartActivity(ActivityRecord r) { |
| 134 | showUnsupportedCompileSdkDialogIfNeeded(r); |
| 135 | showUnsupportedDisplaySizeDialogIfNeeded(r); |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Called when an activity was previously started and is being resumed. |
| 140 | * |
| 141 | * @param r record for the activity being resumed |
| 142 | */ |
| 143 | public void onResumeActivity(ActivityRecord r) { |
| 144 | showUnsupportedDisplaySizeDialogIfNeeded(r); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Called by ActivityManagerService when package data has been cleared. |
| 149 | * |
| 150 | * @param name the package whose data has been cleared |
| 151 | */ |
| 152 | public void onPackageDataCleared(String name) { |
| 153 | removePackageAndHideDialogs(name); |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Called by ActivityManagerService when a package has been uninstalled. |
| 158 | * |
| 159 | * @param name the package that has been uninstalled |
| 160 | */ |
| 161 | public void onPackageUninstalled(String name) { |
| 162 | removePackageAndHideDialogs(name); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Called by ActivityManagerService when the default display density has changed. |
| 167 | */ |
| 168 | public void onDensityChanged() { |
| 169 | mUiHandler.hideUnsupportedDisplaySizeDialog(); |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Does what it says on the tin. |
| 174 | */ |
| 175 | private void removePackageAndHideDialogs(String name) { |
| 176 | mUiHandler.hideDialogsForPackage(name); |
| 177 | |
| 178 | synchronized (mPackageFlags) { |
| 179 | mPackageFlags.remove(name); |
| 180 | mAmsHandler.scheduleWrite(); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Hides the "unsupported display size" warning. |
| 186 | * <p> |
| 187 | * <strong>Note:</strong> Must be called on the UI thread. |
| 188 | */ |
| 189 | @UiThread |
| 190 | private void hideUnsupportedDisplaySizeDialogUiThread() { |
| 191 | if (mUnsupportedDisplaySizeDialog != null) { |
| 192 | mUnsupportedDisplaySizeDialog.dismiss(); |
| 193 | mUnsupportedDisplaySizeDialog = null; |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * Shows the "unsupported display size" warning for the given application. |
| 199 | * <p> |
| 200 | * <strong>Note:</strong> Must be called on the UI thread. |
| 201 | * |
| 202 | * @param ar record for the activity that triggered the warning |
| 203 | */ |
| 204 | @UiThread |
| 205 | private void showUnsupportedDisplaySizeDialogUiThread(ActivityRecord ar) { |
| 206 | if (mUnsupportedDisplaySizeDialog != null) { |
| 207 | mUnsupportedDisplaySizeDialog.dismiss(); |
| 208 | mUnsupportedDisplaySizeDialog = null; |
| 209 | } |
| 210 | if (ar != null && !hasPackageFlag( |
| 211 | ar.packageName, FLAG_HIDE_DISPLAY_SIZE)) { |
| 212 | mUnsupportedDisplaySizeDialog = new UnsupportedDisplaySizeDialog( |
| 213 | AppWarnings.this, mUiContext, ar.info.applicationInfo); |
| 214 | mUnsupportedDisplaySizeDialog.show(); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Shows the "unsupported compile SDK" warning for the given application. |
| 220 | * <p> |
| 221 | * <strong>Note:</strong> Must be called on the UI thread. |
| 222 | * |
| 223 | * @param ar record for the activity that triggered the warning |
| 224 | */ |
| 225 | @UiThread |
| 226 | private void showUnsupportedCompileSdkDialogUiThread(ActivityRecord ar) { |
| 227 | if (mUnsupportedCompileSdkDialog != null) { |
| 228 | mUnsupportedCompileSdkDialog.dismiss(); |
| 229 | mUnsupportedCompileSdkDialog = null; |
| 230 | } |
| 231 | if (ar != null && !hasPackageFlag( |
| 232 | ar.packageName, FLAG_HIDE_COMPILE_SDK)) { |
| 233 | mUnsupportedCompileSdkDialog = new UnsupportedCompileSdkDialog( |
| 234 | AppWarnings.this, mUiContext, ar.info.applicationInfo); |
| 235 | mUnsupportedCompileSdkDialog.show(); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Dismisses all warnings for the given package. |
| 241 | * <p> |
| 242 | * <strong>Note:</strong> Must be called on the UI thread. |
| 243 | * |
| 244 | * @param name the package for which warnings should be dismissed, or {@code null} to dismiss |
| 245 | * all warnings |
| 246 | */ |
| 247 | @UiThread |
| 248 | private void hideDialogsForPackageUiThread(String name) { |
| 249 | // Hides the "unsupported display" dialog if necessary. |
| 250 | if (mUnsupportedDisplaySizeDialog != null && (name == null || name.equals( |
| 251 | mUnsupportedDisplaySizeDialog.getPackageName()))) { |
| 252 | mUnsupportedDisplaySizeDialog.dismiss(); |
| 253 | mUnsupportedDisplaySizeDialog = null; |
| 254 | } |
| 255 | |
| 256 | // Hides the "unsupported compile SDK" dialog if necessary. |
| 257 | if (mUnsupportedCompileSdkDialog != null && (name == null || name.equals( |
| 258 | mUnsupportedCompileSdkDialog.getPackageName()))) { |
| 259 | mUnsupportedCompileSdkDialog.dismiss(); |
| 260 | mUnsupportedCompileSdkDialog = null; |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Returns the value of the flag for the given package. |
| 266 | * |
| 267 | * @param name the package from which to retrieve the flag |
| 268 | * @param flag the bitmask for the flag to retrieve |
| 269 | * @return {@code true} if the flag is enabled, {@code false} otherwise |
| 270 | */ |
| 271 | boolean hasPackageFlag(String name, int flag) { |
| 272 | return (getPackageFlags(name) & flag) == flag; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Sets the flag for the given package to the specified value. |
| 277 | * |
| 278 | * @param name the package on which to set the flag |
| 279 | * @param flag the bitmask for flag to set |
| 280 | * @param enabled the value to set for the flag |
| 281 | */ |
| 282 | void setPackageFlag(String name, int flag, boolean enabled) { |
| 283 | synchronized (mPackageFlags) { |
| 284 | final int curFlags = getPackageFlags(name); |
| 285 | final int newFlags = enabled ? (curFlags & ~flag) : (curFlags | flag); |
| 286 | if (curFlags != newFlags) { |
| 287 | if (newFlags != 0) { |
| 288 | mPackageFlags.put(name, newFlags); |
| 289 | } else { |
| 290 | mPackageFlags.remove(name); |
| 291 | } |
| 292 | mAmsHandler.scheduleWrite(); |
| 293 | } |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Returns the bitmask of flags set for the specified package. |
| 299 | */ |
| 300 | private int getPackageFlags(String name) { |
| 301 | synchronized (mPackageFlags) { |
| 302 | return mPackageFlags.getOrDefault(name, 0); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * Handles messages on the system process UI thread. |
| 308 | */ |
| 309 | private final class UiHandler extends Handler { |
| 310 | private static final int MSG_SHOW_UNSUPPORTED_DISPLAY_SIZE_DIALOG = 1; |
| 311 | private static final int MSG_HIDE_UNSUPPORTED_DISPLAY_SIZE_DIALOG = 2; |
| 312 | private static final int MSG_SHOW_UNSUPPORTED_COMPILE_SDK_DIALOG = 3; |
| 313 | private static final int MSG_HIDE_DIALOGS_FOR_PACKAGE = 4; |
| 314 | |
| 315 | public UiHandler(Looper looper) { |
| 316 | super(looper, null, true); |
| 317 | } |
| 318 | |
| 319 | @Override |
| 320 | public void handleMessage(Message msg) { |
| 321 | switch (msg.what) { |
| 322 | case MSG_SHOW_UNSUPPORTED_DISPLAY_SIZE_DIALOG: { |
| 323 | final ActivityRecord ar = (ActivityRecord) msg.obj; |
| 324 | showUnsupportedDisplaySizeDialogUiThread(ar); |
| 325 | } break; |
| 326 | case MSG_HIDE_UNSUPPORTED_DISPLAY_SIZE_DIALOG: { |
| 327 | hideUnsupportedDisplaySizeDialogUiThread(); |
| 328 | } break; |
| 329 | case MSG_SHOW_UNSUPPORTED_COMPILE_SDK_DIALOG: { |
| 330 | final ActivityRecord ar = (ActivityRecord) msg.obj; |
| 331 | showUnsupportedCompileSdkDialogUiThread(ar); |
| 332 | } break; |
| 333 | case MSG_HIDE_DIALOGS_FOR_PACKAGE: { |
| 334 | final String name = (String) msg.obj; |
| 335 | hideDialogsForPackageUiThread(name); |
| 336 | } break; |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | public void showUnsupportedDisplaySizeDialog(ActivityRecord r) { |
| 341 | removeMessages(MSG_SHOW_UNSUPPORTED_DISPLAY_SIZE_DIALOG); |
| 342 | obtainMessage(MSG_SHOW_UNSUPPORTED_DISPLAY_SIZE_DIALOG, r).sendToTarget(); |
| 343 | } |
| 344 | |
| 345 | public void hideUnsupportedDisplaySizeDialog() { |
| 346 | removeMessages(MSG_HIDE_UNSUPPORTED_DISPLAY_SIZE_DIALOG); |
| 347 | sendEmptyMessage(MSG_HIDE_UNSUPPORTED_DISPLAY_SIZE_DIALOG); |
| 348 | } |
| 349 | |
| 350 | public void showUnsupportedCompileSdkDialog(ActivityRecord r) { |
| 351 | removeMessages(MSG_SHOW_UNSUPPORTED_COMPILE_SDK_DIALOG); |
| 352 | obtainMessage(MSG_SHOW_UNSUPPORTED_COMPILE_SDK_DIALOG, r).sendToTarget(); |
| 353 | } |
| 354 | |
| 355 | public void hideDialogsForPackage(String name) { |
| 356 | obtainMessage(MSG_HIDE_DIALOGS_FOR_PACKAGE, name).sendToTarget(); |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * Handles messages on the ActivityManagerService thread. |
| 362 | */ |
| 363 | private final class ConfigHandler extends Handler { |
| 364 | private static final int MSG_WRITE = ActivityManagerService.FIRST_COMPAT_MODE_MSG; |
| 365 | |
| 366 | private static final int DELAY_MSG_WRITE = 10000; |
| 367 | |
| 368 | public ConfigHandler(Looper looper) { |
| 369 | super(looper, null, true); |
| 370 | } |
| 371 | |
| 372 | @Override |
| 373 | public void handleMessage(Message msg) { |
| 374 | switch (msg.what) { |
| 375 | case MSG_WRITE: |
| 376 | writeConfigToFileAmsThread(); |
| 377 | break; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | public void scheduleWrite() { |
| 382 | removeMessages(MSG_WRITE); |
| 383 | sendEmptyMessageDelayed(MSG_WRITE, DELAY_MSG_WRITE); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * Writes the configuration file. |
| 389 | * <p> |
| 390 | * <strong>Note:</strong> Should be called from the ActivityManagerService thread unless you |
| 391 | * don't care where you're doing I/O operations. But you <i>do</i> care, don't you? |
| 392 | */ |
| 393 | private void writeConfigToFileAmsThread() { |
| 394 | // Create a shallow copy so that we don't have to synchronize on config. |
| 395 | final HashMap<String, Integer> packageFlags; |
| 396 | synchronized (mPackageFlags) { |
| 397 | packageFlags = new HashMap<>(mPackageFlags); |
| 398 | } |
| 399 | |
| 400 | FileOutputStream fos = null; |
| 401 | try { |
| 402 | fos = mConfigFile.startWrite(); |
| 403 | |
| 404 | final XmlSerializer out = new FastXmlSerializer(); |
| 405 | out.setOutput(fos, StandardCharsets.UTF_8.name()); |
| 406 | out.startDocument(null, true); |
| 407 | out.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| 408 | out.startTag(null, "packages"); |
| 409 | |
| 410 | for (Map.Entry<String, Integer> entry : packageFlags.entrySet()) { |
| 411 | String pkg = entry.getKey(); |
| 412 | int mode = entry.getValue(); |
| 413 | if (mode == 0) { |
| 414 | continue; |
| 415 | } |
| 416 | out.startTag(null, "package"); |
| 417 | out.attribute(null, "name", pkg); |
| 418 | out.attribute(null, "flags", Integer.toString(mode)); |
| 419 | out.endTag(null, "package"); |
| 420 | } |
| 421 | |
| 422 | out.endTag(null, "packages"); |
| 423 | out.endDocument(); |
| 424 | |
| 425 | mConfigFile.finishWrite(fos); |
| 426 | } catch (java.io.IOException e1) { |
| 427 | Slog.w(TAG, "Error writing package metadata", e1); |
| 428 | if (fos != null) { |
| 429 | mConfigFile.failWrite(fos); |
| 430 | } |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | /** |
| 435 | * Reads the configuration file and populates the package flags. |
| 436 | * <p> |
| 437 | * <strong>Note:</strong> Must be called from the constructor (and thus on the |
| 438 | * ActivityManagerService thread) since we don't synchronize on config. |
| 439 | */ |
| 440 | private void readConfigFromFileAmsThread() { |
| 441 | FileInputStream fis = null; |
| 442 | |
| 443 | try { |
| 444 | fis = mConfigFile.openRead(); |
| 445 | |
| 446 | final XmlPullParser parser = Xml.newPullParser(); |
| 447 | parser.setInput(fis, StandardCharsets.UTF_8.name()); |
| 448 | |
| 449 | int eventType = parser.getEventType(); |
| 450 | while (eventType != XmlPullParser.START_TAG && |
| 451 | eventType != XmlPullParser.END_DOCUMENT) { |
| 452 | eventType = parser.next(); |
| 453 | } |
| 454 | if (eventType == XmlPullParser.END_DOCUMENT) { |
| 455 | return; |
| 456 | } |
| 457 | |
| 458 | String tagName = parser.getName(); |
| 459 | if ("packages".equals(tagName)) { |
| 460 | eventType = parser.next(); |
| 461 | do { |
| 462 | if (eventType == XmlPullParser.START_TAG) { |
| 463 | tagName = parser.getName(); |
| 464 | if (parser.getDepth() == 2) { |
| 465 | if ("package".equals(tagName)) { |
| 466 | final String name = parser.getAttributeValue(null, "name"); |
| 467 | if (name != null) { |
| 468 | final String flags = parser.getAttributeValue( |
| 469 | null, "flags"); |
| 470 | int flagsInt = 0; |
| 471 | if (flags != null) { |
| 472 | try { |
| 473 | flagsInt = Integer.parseInt(flags); |
| 474 | } catch (NumberFormatException e) { |
| 475 | } |
| 476 | } |
| 477 | mPackageFlags.put(name, flagsInt); |
| 478 | } |
| 479 | } |
| 480 | } |
| 481 | } |
| 482 | eventType = parser.next(); |
| 483 | } while (eventType != XmlPullParser.END_DOCUMENT); |
| 484 | } |
| 485 | } catch (XmlPullParserException e) { |
| 486 | Slog.w(TAG, "Error reading package metadata", e); |
| 487 | } catch (java.io.IOException e) { |
| 488 | if (fis != null) Slog.w(TAG, "Error reading package metadata", e); |
| 489 | } finally { |
| 490 | if (fis != null) { |
| 491 | try { |
| 492 | fis.close(); |
| 493 | } catch (java.io.IOException e1) { |
| 494 | } |
| 495 | } |
| 496 | } |
| 497 | } |
| 498 | } |