1/* 2 * Copyright (C) 2014 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 17package com.android.server.pm; 18 19import android.app.AppGlobals; 20import android.content.ComponentName; 21import android.content.Context; 22import android.content.Intent; 23import android.content.pm.ActivityInfo; 24import android.content.pm.ILauncherApps; 25import android.content.pm.IOnAppsChangedListener; 26import android.content.pm.IPackageManager; 27import android.content.pm.PackageManager; 28import android.content.pm.PackageInfo; 29import android.content.pm.ResolveInfo; 30import android.content.pm.UserInfo; 31import android.graphics.Rect; 32import android.net.Uri; 33import android.os.Binder; 34import android.os.Bundle; 35import android.os.IInterface; 36import android.os.RemoteCallbackList; 37import android.os.RemoteException; 38import android.os.UserHandle; 39import android.os.UserManager; 40import android.provider.Settings; 41import android.util.Log; 42import android.util.Slog; 43 44import com.android.internal.content.PackageMonitor; 45import com.android.server.SystemService; 46 47import java.util.ArrayList; 48import java.util.List; 49 50/** 51 * Service that manages requests and callbacks for launchers that support 52 * managed profiles. 53 */ 54 55public class LauncherAppsService extends SystemService { 56 57 private final LauncherAppsImpl mLauncherAppsImpl; 58 59 public LauncherAppsService(Context context) { 60 super(context); 61 mLauncherAppsImpl = new LauncherAppsImpl(context); 62 } 63 64 @Override 65 public void onStart() { 66 publishBinderService(Context.LAUNCHER_APPS_SERVICE, mLauncherAppsImpl); 67 } 68 69 class LauncherAppsImpl extends ILauncherApps.Stub { 70 private static final boolean DEBUG = false; 71 private static final String TAG = "LauncherAppsService"; 72 private final Context mContext; 73 private final PackageManager mPm; 74 private final UserManager mUm; 75 private final PackageCallbackList<IOnAppsChangedListener> mListeners 76 = new PackageCallbackList<IOnAppsChangedListener>(); 77 78 private MyPackageMonitor mPackageMonitor = new MyPackageMonitor(); 79 80 public LauncherAppsImpl(Context context) { 81 mContext = context; 82 mPm = mContext.getPackageManager(); 83 mUm = (UserManager) mContext.getSystemService(Context.USER_SERVICE); 84 } 85 86 /* 87 * @see android.content.pm.ILauncherApps#addOnAppsChangedListener( 88 * android.content.pm.IOnAppsChangedListener) 89 */ 90 @Override 91 public void addOnAppsChangedListener(IOnAppsChangedListener listener) throws RemoteException { 92 synchronized (mListeners) { 93 if (DEBUG) { 94 Log.d(TAG, "Adding listener from " + Binder.getCallingUserHandle()); 95 } 96 if (mListeners.getRegisteredCallbackCount() == 0) { 97 if (DEBUG) { 98 Log.d(TAG, "Starting package monitoring"); 99 } 100 startWatchingPackageBroadcasts(); 101 } 102 mListeners.unregister(listener); 103 mListeners.register(listener, Binder.getCallingUserHandle()); 104 } 105 } 106 107 /* 108 * @see android.content.pm.ILauncherApps#removeOnAppsChangedListener( 109 * android.content.pm.IOnAppsChangedListener) 110 */ 111 @Override 112 public void removeOnAppsChangedListener(IOnAppsChangedListener listener) 113 throws RemoteException { 114 synchronized (mListeners) { 115 if (DEBUG) { 116 Log.d(TAG, "Removing listener from " + Binder.getCallingUserHandle()); 117 } 118 mListeners.unregister(listener); 119 if (mListeners.getRegisteredCallbackCount() == 0) { 120 stopWatchingPackageBroadcasts(); 121 } 122 } 123 } 124 125 /** 126 * Register a receiver to watch for package broadcasts 127 */ 128 private void startWatchingPackageBroadcasts() { 129 mPackageMonitor.register(mContext, null, UserHandle.ALL, true); 130 } 131 132 /** 133 * Unregister package broadcast receiver 134 */ 135 private void stopWatchingPackageBroadcasts() { 136 if (DEBUG) { 137 Log.d(TAG, "Stopped watching for packages"); 138 } 139 mPackageMonitor.unregister(); 140 } 141 142 void checkCallbackCount() { 143 synchronized (mListeners) { 144 if (DEBUG) { 145 Log.d(TAG, "Callback count = " + mListeners.getRegisteredCallbackCount()); 146 } 147 if (mListeners.getRegisteredCallbackCount() == 0) { 148 stopWatchingPackageBroadcasts(); 149 } 150 } 151 } 152 153 /** 154 * Checks if the caller is in the same group as the userToCheck. 155 */ 156 private void ensureInUserProfiles(UserHandle userToCheck, String message) { 157 final int callingUserId = UserHandle.getCallingUserId(); 158 final int targetUserId = userToCheck.getIdentifier(); 159 160 if (targetUserId == callingUserId) return; 161 162 long ident = Binder.clearCallingIdentity(); 163 try { 164 UserInfo callingUserInfo = mUm.getUserInfo(callingUserId); 165 UserInfo targetUserInfo = mUm.getUserInfo(targetUserId); 166 if (targetUserInfo == null 167 || targetUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID 168 || targetUserInfo.profileGroupId != callingUserInfo.profileGroupId) { 169 throw new SecurityException(message); 170 } 171 } finally { 172 Binder.restoreCallingIdentity(ident); 173 } 174 } 175 176 /** 177 * Checks if the user is enabled. 178 */ 179 private boolean isUserEnabled(UserHandle user) { 180 long ident = Binder.clearCallingIdentity(); 181 try { 182 UserInfo targetUserInfo = mUm.getUserInfo(user.getIdentifier()); 183 return targetUserInfo != null && targetUserInfo.isEnabled(); 184 } finally { 185 Binder.restoreCallingIdentity(ident); 186 } 187 } 188 189 @Override 190 public List<ResolveInfo> getLauncherActivities(String packageName, UserHandle user) 191 throws RemoteException { 192 ensureInUserProfiles(user, "Cannot retrieve activities for unrelated profile " + user); 193 if (!isUserEnabled(user)) { 194 return new ArrayList<ResolveInfo>(); 195 } 196 197 final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null); 198 mainIntent.addCategory(Intent.CATEGORY_LAUNCHER); 199 mainIntent.setPackage(packageName); 200 long ident = Binder.clearCallingIdentity(); 201 try { 202 List<ResolveInfo> apps = mPm.queryIntentActivitiesAsUser(mainIntent, 0 /* flags */, 203 user.getIdentifier()); 204 return apps; 205 } finally { 206 Binder.restoreCallingIdentity(ident); 207 } 208 } 209 210 @Override 211 public ResolveInfo resolveActivity(Intent intent, UserHandle user) 212 throws RemoteException { 213 ensureInUserProfiles(user, "Cannot resolve activity for unrelated profile " + user); 214 if (!isUserEnabled(user)) { 215 return null; 216 } 217 218 long ident = Binder.clearCallingIdentity(); 219 try { 220 ResolveInfo app = mPm.resolveActivityAsUser(intent, 0, user.getIdentifier()); 221 return app; 222 } finally { 223 Binder.restoreCallingIdentity(ident); 224 } 225 } 226 227 @Override 228 public boolean isPackageEnabled(String packageName, UserHandle user) 229 throws RemoteException { 230 ensureInUserProfiles(user, "Cannot check package for unrelated profile " + user); 231 if (!isUserEnabled(user)) { 232 return false; 233 } 234 235 long ident = Binder.clearCallingIdentity(); 236 try { 237 IPackageManager pm = AppGlobals.getPackageManager(); 238 PackageInfo info = pm.getPackageInfo(packageName, 0, user.getIdentifier()); 239 return info != null && info.applicationInfo.enabled; 240 } finally { 241 Binder.restoreCallingIdentity(ident); 242 } 243 } 244 245 @Override 246 public boolean isActivityEnabled(ComponentName component, UserHandle user) 247 throws RemoteException { 248 ensureInUserProfiles(user, "Cannot check component for unrelated profile " + user); 249 if (!isUserEnabled(user)) { 250 return false; 251 } 252 253 long ident = Binder.clearCallingIdentity(); 254 try { 255 IPackageManager pm = AppGlobals.getPackageManager(); 256 ActivityInfo info = pm.getActivityInfo(component, 0, user.getIdentifier()); 257 return info != null; 258 } finally { 259 Binder.restoreCallingIdentity(ident); 260 } 261 } 262 263 @Override 264 public void startActivityAsUser(ComponentName component, Rect sourceBounds, 265 Bundle opts, UserHandle user) throws RemoteException { 266 ensureInUserProfiles(user, "Cannot start activity for unrelated profile " + user); 267 if (!isUserEnabled(user)) { 268 throw new IllegalStateException("Cannot start activity for disabled profile " + user); 269 } 270 271 Intent launchIntent = new Intent(Intent.ACTION_MAIN); 272 launchIntent.addCategory(Intent.CATEGORY_LAUNCHER); 273 launchIntent.setSourceBounds(sourceBounds); 274 launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK 275 | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED); 276 launchIntent.setPackage(component.getPackageName()); 277 278 long ident = Binder.clearCallingIdentity(); 279 try { 280 IPackageManager pm = AppGlobals.getPackageManager(); 281 ActivityInfo info = pm.getActivityInfo(component, 0, user.getIdentifier()); 282 if (!info.exported) { 283 throw new SecurityException("Cannot launch non-exported components " 284 + component); 285 } 286 287 // Check that the component actually has Intent.CATEGORY_LAUCNCHER 288 // as calling startActivityAsUser ignores the category and just 289 // resolves based on the component if present. 290 List<ResolveInfo> apps = mPm.queryIntentActivitiesAsUser(launchIntent, 291 0 /* flags */, user.getIdentifier()); 292 final int size = apps.size(); 293 for (int i = 0; i < size; ++i) { 294 ActivityInfo activityInfo = apps.get(i).activityInfo; 295 if (activityInfo.packageName.equals(component.getPackageName()) && 296 activityInfo.name.equals(component.getClassName())) { 297 // Found an activity with category launcher that matches 298 // this component so ok to launch. 299 launchIntent.setComponent(component); 300 mContext.startActivityAsUser(launchIntent, opts, user); 301 return; 302 } 303 } 304 throw new SecurityException("Attempt to launch activity without " 305 + " category Intent.CATEGORY_LAUNCHER " + component); 306 } finally { 307 Binder.restoreCallingIdentity(ident); 308 } 309 } 310 311 @Override 312 public void showAppDetailsAsUser(ComponentName component, Rect sourceBounds, 313 Bundle opts, UserHandle user) throws RemoteException { 314 ensureInUserProfiles(user, "Cannot show app details for unrelated profile " + user); 315 if (!isUserEnabled(user)) { 316 throw new IllegalStateException("Cannot show app details for disabled profile " 317 + user); 318 } 319 320 long ident = Binder.clearCallingIdentity(); 321 try { 322 String packageName = component.getPackageName(); 323 Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, 324 Uri.fromParts("package", packageName, null)); 325 intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | 326 Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); 327 intent.setSourceBounds(sourceBounds); 328 mContext.startActivityAsUser(intent, opts, user); 329 } finally { 330 Binder.restoreCallingIdentity(ident); 331 } 332 } 333 334 335 private class MyPackageMonitor extends PackageMonitor { 336 337 /** Checks if user is a profile of or same as listeningUser. 338 * and the user is enabled. */ 339 private boolean isEnabledProfileOf(UserHandle user, UserHandle listeningUser, 340 String debugMsg) { 341 if (user.getIdentifier() == listeningUser.getIdentifier()) { 342 if (DEBUG) Log.d(TAG, "Delivering msg to same user " + debugMsg); 343 return true; 344 } 345 long ident = Binder.clearCallingIdentity(); 346 try { 347 UserInfo userInfo = mUm.getUserInfo(user.getIdentifier()); 348 UserInfo listeningUserInfo = mUm.getUserInfo(listeningUser.getIdentifier()); 349 if (userInfo == null || listeningUserInfo == null 350 || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID 351 || userInfo.profileGroupId != listeningUserInfo.profileGroupId 352 || !userInfo.isEnabled()) { 353 if (DEBUG) { 354 Log.d(TAG, "Not delivering msg from " + user + " to " + listeningUser + ":" 355 + debugMsg); 356 } 357 return false; 358 } else { 359 if (DEBUG) { 360 Log.d(TAG, "Delivering msg from " + user + " to " + listeningUser + ":" 361 + debugMsg); 362 } 363 return true; 364 } 365 } finally { 366 Binder.restoreCallingIdentity(ident); 367 } 368 } 369 370 @Override 371 public void onPackageAdded(String packageName, int uid) { 372 UserHandle user = new UserHandle(getChangingUserId()); 373 final int n = mListeners.beginBroadcast(); 374 for (int i = 0; i < n; i++) { 375 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 376 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 377 if (!isEnabledProfileOf(user, listeningUser, "onPackageAdded")) continue; 378 try { 379 listener.onPackageAdded(user, packageName); 380 } catch (RemoteException re) { 381 Slog.d(TAG, "Callback failed ", re); 382 } 383 } 384 mListeners.finishBroadcast(); 385 386 super.onPackageAdded(packageName, uid); 387 } 388 389 @Override 390 public void onPackageRemoved(String packageName, int uid) { 391 UserHandle user = new UserHandle(getChangingUserId()); 392 final int n = mListeners.beginBroadcast(); 393 for (int i = 0; i < n; i++) { 394 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 395 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 396 if (!isEnabledProfileOf(user, listeningUser, "onPackageRemoved")) continue; 397 try { 398 listener.onPackageRemoved(user, packageName); 399 } catch (RemoteException re) { 400 Slog.d(TAG, "Callback failed ", re); 401 } 402 } 403 mListeners.finishBroadcast(); 404 405 super.onPackageRemoved(packageName, uid); 406 } 407 408 @Override 409 public void onPackageModified(String packageName) { 410 UserHandle user = new UserHandle(getChangingUserId()); 411 final int n = mListeners.beginBroadcast(); 412 for (int i = 0; i < n; i++) { 413 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 414 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 415 if (!isEnabledProfileOf(user, listeningUser, "onPackageModified")) continue; 416 try { 417 listener.onPackageChanged(user, packageName); 418 } catch (RemoteException re) { 419 Slog.d(TAG, "Callback failed ", re); 420 } 421 } 422 mListeners.finishBroadcast(); 423 424 super.onPackageModified(packageName); 425 } 426 427 @Override 428 public void onPackagesAvailable(String[] packages) { 429 UserHandle user = new UserHandle(getChangingUserId()); 430 final int n = mListeners.beginBroadcast(); 431 for (int i = 0; i < n; i++) { 432 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 433 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 434 if (!isEnabledProfileOf(user, listeningUser, "onPackagesAvailable")) continue; 435 try { 436 listener.onPackagesAvailable(user, packages, isReplacing()); 437 } catch (RemoteException re) { 438 Slog.d(TAG, "Callback failed ", re); 439 } 440 } 441 mListeners.finishBroadcast(); 442 443 super.onPackagesAvailable(packages); 444 } 445 446 @Override 447 public void onPackagesUnavailable(String[] packages) { 448 UserHandle user = new UserHandle(getChangingUserId()); 449 final int n = mListeners.beginBroadcast(); 450 for (int i = 0; i < n; i++) { 451 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 452 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 453 if (!isEnabledProfileOf(user, listeningUser, "onPackagesUnavailable")) continue; 454 try { 455 listener.onPackagesUnavailable(user, packages, isReplacing()); 456 } catch (RemoteException re) { 457 Slog.d(TAG, "Callback failed ", re); 458 } 459 } 460 mListeners.finishBroadcast(); 461 462 super.onPackagesUnavailable(packages); 463 } 464 465 } 466 467 class PackageCallbackList<T extends IInterface> extends RemoteCallbackList<T> { 468 @Override 469 public void onCallbackDied(T callback, Object cookie) { 470 checkCallbackCount(); 471 } 472 } 473 } 474} 475