LauncherAppsService.java revision 2df1892f411de6fa93ba487e3c4d23a079b74fcb
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.os.Binder; 33import android.os.Bundle; 34import android.os.IInterface; 35import android.os.RemoteCallbackList; 36import android.os.RemoteException; 37import android.os.UserHandle; 38import android.os.UserManager; 39import android.util.Log; 40import android.util.Slog; 41 42import com.android.internal.content.PackageMonitor; 43import com.android.server.SystemService; 44 45import java.util.ArrayList; 46import java.util.List; 47 48/** 49 * Service that manages requests and callbacks for launchers that support 50 * managed profiles. 51 */ 52 53public class LauncherAppsService extends SystemService { 54 55 private final LauncherAppsImpl mLauncherAppsImpl; 56 57 public LauncherAppsService(Context context) { 58 super(context); 59 mLauncherAppsImpl = new LauncherAppsImpl(context); 60 } 61 62 @Override 63 public void onStart() { 64 publishBinderService(Context.LAUNCHER_APPS_SERVICE, mLauncherAppsImpl); 65 } 66 67 class LauncherAppsImpl extends ILauncherApps.Stub { 68 private static final boolean DEBUG = false; 69 private static final String TAG = "LauncherAppsService"; 70 private final Context mContext; 71 private final PackageManager mPm; 72 private final UserManager mUm; 73 private final PackageCallbackList<IOnAppsChangedListener> mListeners 74 = new PackageCallbackList<IOnAppsChangedListener>(); 75 76 private MyPackageMonitor mPackageMonitor = new MyPackageMonitor(); 77 78 public LauncherAppsImpl(Context context) { 79 mContext = context; 80 mPm = mContext.getPackageManager(); 81 mUm = (UserManager) mContext.getSystemService(Context.USER_SERVICE); 82 } 83 84 /* 85 * @see android.content.pm.ILauncherApps#addOnAppsChangedListener( 86 * android.content.pm.IOnAppsChangedListener) 87 */ 88 @Override 89 public void addOnAppsChangedListener(IOnAppsChangedListener listener) throws RemoteException { 90 synchronized (mListeners) { 91 if (DEBUG) { 92 Log.d(TAG, "Adding listener from " + Binder.getCallingUserHandle()); 93 } 94 if (mListeners.getRegisteredCallbackCount() == 0) { 95 if (DEBUG) { 96 Log.d(TAG, "Starting package monitoring"); 97 } 98 startWatchingPackageBroadcasts(); 99 } 100 mListeners.unregister(listener); 101 mListeners.register(listener, Binder.getCallingUserHandle()); 102 } 103 } 104 105 /* 106 * @see android.content.pm.ILauncherApps#removeOnAppsChangedListener( 107 * android.content.pm.IOnAppsChangedListener) 108 */ 109 @Override 110 public void removeOnAppsChangedListener(IOnAppsChangedListener listener) 111 throws RemoteException { 112 synchronized (mListeners) { 113 if (DEBUG) { 114 Log.d(TAG, "Removing listener from " + Binder.getCallingUserHandle()); 115 } 116 mListeners.unregister(listener); 117 if (mListeners.getRegisteredCallbackCount() == 0) { 118 stopWatchingPackageBroadcasts(); 119 } 120 } 121 } 122 123 /** 124 * Register a receiver to watch for package broadcasts 125 */ 126 private void startWatchingPackageBroadcasts() { 127 mPackageMonitor.register(mContext, null, UserHandle.ALL, true); 128 } 129 130 /** 131 * Unregister package broadcast receiver 132 */ 133 private void stopWatchingPackageBroadcasts() { 134 if (DEBUG) { 135 Log.d(TAG, "Stopped watching for packages"); 136 } 137 mPackageMonitor.unregister(); 138 } 139 140 void checkCallbackCount() { 141 synchronized (mListeners) { 142 if (DEBUG) { 143 Log.d(TAG, "Callback count = " + mListeners.getRegisteredCallbackCount()); 144 } 145 if (mListeners.getRegisteredCallbackCount() == 0) { 146 stopWatchingPackageBroadcasts(); 147 } 148 } 149 } 150 151 /** 152 * Checks if the caller is in the same group as the userToCheck. 153 */ 154 private void ensureInUserProfiles(UserHandle userToCheck, String message) { 155 final int callingUserId = UserHandle.getCallingUserId(); 156 final int targetUserId = userToCheck.getIdentifier(); 157 158 if (targetUserId == callingUserId) return; 159 160 long ident = Binder.clearCallingIdentity(); 161 try { 162 UserInfo callingUserInfo = mUm.getUserInfo(callingUserId); 163 UserInfo targetUserInfo = mUm.getUserInfo(targetUserId); 164 if (targetUserInfo == null 165 || targetUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID 166 || targetUserInfo.profileGroupId != callingUserInfo.profileGroupId) { 167 throw new SecurityException(message); 168 } 169 } finally { 170 Binder.restoreCallingIdentity(ident); 171 } 172 } 173 174 /** 175 * Checks if the user is enabled. 176 */ 177 private boolean isUserEnabled(UserHandle user) { 178 long ident = Binder.clearCallingIdentity(); 179 try { 180 UserInfo targetUserInfo = mUm.getUserInfo(user.getIdentifier()); 181 return targetUserInfo != null && targetUserInfo.isEnabled(); 182 } finally { 183 Binder.restoreCallingIdentity(ident); 184 } 185 } 186 187 @Override 188 public List<ResolveInfo> getLauncherActivities(String packageName, UserHandle user) 189 throws RemoteException { 190 ensureInUserProfiles(user, "Cannot retrieve activities for unrelated profile " + user); 191 if (!isUserEnabled(user)) { 192 return new ArrayList<ResolveInfo>(); 193 } 194 195 final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null); 196 mainIntent.addCategory(Intent.CATEGORY_LAUNCHER); 197 mainIntent.setPackage(packageName); 198 long ident = Binder.clearCallingIdentity(); 199 try { 200 List<ResolveInfo> apps = mPm.queryIntentActivitiesAsUser(mainIntent, 201 PackageManager.NO_CROSS_PROFILE, // We only want the apps for this user 202 user.getIdentifier()); 203 return apps; 204 } finally { 205 Binder.restoreCallingIdentity(ident); 206 } 207 } 208 209 @Override 210 public ResolveInfo resolveActivity(Intent intent, UserHandle user) 211 throws RemoteException { 212 ensureInUserProfiles(user, "Cannot resolve activity for unrelated profile " + user); 213 if (!isUserEnabled(user)) { 214 return null; 215 } 216 217 long ident = Binder.clearCallingIdentity(); 218 try { 219 ResolveInfo app = mPm.resolveActivityAsUser(intent, 0, user.getIdentifier()); 220 return app; 221 } finally { 222 Binder.restoreCallingIdentity(ident); 223 } 224 } 225 226 @Override 227 public boolean isPackageEnabled(String packageName, UserHandle user) 228 throws RemoteException { 229 ensureInUserProfiles(user, "Cannot check package for unrelated profile " + user); 230 if (!isUserEnabled(user)) { 231 return false; 232 } 233 234 long ident = Binder.clearCallingIdentity(); 235 try { 236 IPackageManager pm = AppGlobals.getPackageManager(); 237 PackageInfo info = pm.getPackageInfo(packageName, 0, user.getIdentifier()); 238 return info != null && info.applicationInfo.enabled; 239 } finally { 240 Binder.restoreCallingIdentity(ident); 241 } 242 } 243 244 @Override 245 public boolean isActivityEnabled(ComponentName component, UserHandle user) 246 throws RemoteException { 247 ensureInUserProfiles(user, "Cannot check component for unrelated profile " + user); 248 if (!isUserEnabled(user)) { 249 return false; 250 } 251 252 long ident = Binder.clearCallingIdentity(); 253 try { 254 IPackageManager pm = AppGlobals.getPackageManager(); 255 ActivityInfo info = pm.getActivityInfo(component, 0, user.getIdentifier()); 256 return info != null && info.isEnabled(); 257 } finally { 258 Binder.restoreCallingIdentity(ident); 259 } 260 } 261 262 @Override 263 public void startActivityAsUser(ComponentName component, Rect sourceBounds, 264 Bundle opts, UserHandle user) throws RemoteException { 265 ensureInUserProfiles(user, "Cannot start activity for unrelated profile " + user); 266 if (!isUserEnabled(user)) { 267 throw new IllegalStateException("Cannot start activity for disabled profile " + user); 268 } 269 270 Intent launchIntent = new Intent(Intent.ACTION_MAIN); 271 launchIntent.addCategory(Intent.CATEGORY_LAUNCHER); 272 launchIntent.setSourceBounds(sourceBounds); 273 launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 274 launchIntent.setPackage(component.getPackageName()); 275 276 long ident = Binder.clearCallingIdentity(); 277 try { 278 IPackageManager pm = AppGlobals.getPackageManager(); 279 ActivityInfo info = pm.getActivityInfo(component, 0, user.getIdentifier()); 280 if (!info.exported) { 281 throw new SecurityException("Cannot launch non-exported components " 282 + component); 283 } 284 285 // Check that the component actually has Intent.CATEGORY_LAUCNCHER 286 // as calling startActivityAsUser ignores the category and just 287 // resolves based on the component if present. 288 List<ResolveInfo> apps = mPm.queryIntentActivitiesAsUser(launchIntent, 289 PackageManager.NO_CROSS_PROFILE, // We only want the apps for this user 290 user.getIdentifier()); 291 final int size = apps.size(); 292 for (int i = 0; i < size; ++i) { 293 ActivityInfo activityInfo = apps.get(i).activityInfo; 294 if (activityInfo.packageName.equals(component.getPackageName()) && 295 activityInfo.name.equals(component.getClassName())) { 296 // Found an activity with category launcher that matches 297 // this component so ok to launch. 298 launchIntent.setComponent(component); 299 mContext.startActivityAsUser(launchIntent, opts, user); 300 return; 301 } 302 } 303 throw new SecurityException("Attempt to launch activity without " 304 + " category Intent.CATEGORY_LAUNCHER " + component); 305 } finally { 306 Binder.restoreCallingIdentity(ident); 307 } 308 } 309 310 private class MyPackageMonitor extends PackageMonitor { 311 312 /** Checks if user is a profile of or same as listeningUser. 313 * and the user is enabled. */ 314 private boolean isEnabledProfileOf(UserHandle user, UserHandle listeningUser, 315 String debugMsg) { 316 if (user.getIdentifier() == listeningUser.getIdentifier()) { 317 if (DEBUG) Log.d(TAG, "Delivering msg to same user " + debugMsg); 318 return true; 319 } 320 long ident = Binder.clearCallingIdentity(); 321 try { 322 UserInfo userInfo = mUm.getUserInfo(user.getIdentifier()); 323 UserInfo listeningUserInfo = mUm.getUserInfo(listeningUser.getIdentifier()); 324 if (userInfo == null || listeningUserInfo == null 325 || userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID 326 || userInfo.profileGroupId != listeningUserInfo.profileGroupId 327 || !userInfo.isEnabled()) { 328 if (DEBUG) { 329 Log.d(TAG, "Not delivering msg from " + user + " to " + listeningUser + ":" 330 + debugMsg); 331 } 332 return false; 333 } else { 334 if (DEBUG) { 335 Log.d(TAG, "Delivering msg from " + user + " to " + listeningUser + ":" 336 + debugMsg); 337 } 338 return true; 339 } 340 } finally { 341 Binder.restoreCallingIdentity(ident); 342 } 343 } 344 345 @Override 346 public void onPackageAdded(String packageName, int uid) { 347 UserHandle user = new UserHandle(getChangingUserId()); 348 final int n = mListeners.beginBroadcast(); 349 for (int i = 0; i < n; i++) { 350 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 351 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 352 if (!isEnabledProfileOf(user, listeningUser, "onPackageAdded")) continue; 353 try { 354 listener.onPackageAdded(user, packageName); 355 } catch (RemoteException re) { 356 Slog.d(TAG, "Callback failed ", re); 357 } 358 } 359 mListeners.finishBroadcast(); 360 361 super.onPackageAdded(packageName, uid); 362 } 363 364 @Override 365 public void onPackageRemoved(String packageName, int uid) { 366 UserHandle user = new UserHandle(getChangingUserId()); 367 final int n = mListeners.beginBroadcast(); 368 for (int i = 0; i < n; i++) { 369 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 370 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 371 if (!isEnabledProfileOf(user, listeningUser, "onPackageRemoved")) continue; 372 try { 373 listener.onPackageRemoved(user, packageName); 374 } catch (RemoteException re) { 375 Slog.d(TAG, "Callback failed ", re); 376 } 377 } 378 mListeners.finishBroadcast(); 379 380 super.onPackageRemoved(packageName, uid); 381 } 382 383 @Override 384 public void onPackageModified(String packageName) { 385 UserHandle user = new UserHandle(getChangingUserId()); 386 final int n = mListeners.beginBroadcast(); 387 for (int i = 0; i < n; i++) { 388 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 389 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 390 if (!isEnabledProfileOf(user, listeningUser, "onPackageModified")) continue; 391 try { 392 listener.onPackageChanged(user, packageName); 393 } catch (RemoteException re) { 394 Slog.d(TAG, "Callback failed ", re); 395 } 396 } 397 mListeners.finishBroadcast(); 398 399 super.onPackageModified(packageName); 400 } 401 402 @Override 403 public void onPackagesAvailable(String[] packages) { 404 UserHandle user = new UserHandle(getChangingUserId()); 405 final int n = mListeners.beginBroadcast(); 406 for (int i = 0; i < n; i++) { 407 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 408 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 409 if (!isEnabledProfileOf(user, listeningUser, "onPackagesAvailable")) continue; 410 try { 411 listener.onPackagesAvailable(user, packages, isReplacing()); 412 } catch (RemoteException re) { 413 Slog.d(TAG, "Callback failed ", re); 414 } 415 } 416 mListeners.finishBroadcast(); 417 418 super.onPackagesAvailable(packages); 419 } 420 421 @Override 422 public void onPackagesUnavailable(String[] packages) { 423 UserHandle user = new UserHandle(getChangingUserId()); 424 final int n = mListeners.beginBroadcast(); 425 for (int i = 0; i < n; i++) { 426 IOnAppsChangedListener listener = mListeners.getBroadcastItem(i); 427 UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i); 428 if (!isEnabledProfileOf(user, listeningUser, "onPackagesUnavailable")) continue; 429 try { 430 listener.onPackagesUnavailable(user, packages, isReplacing()); 431 } catch (RemoteException re) { 432 Slog.d(TAG, "Callback failed ", re); 433 } 434 } 435 mListeners.finishBroadcast(); 436 437 super.onPackagesUnavailable(packages); 438 } 439 440 } 441 442 class PackageCallbackList<T extends IInterface> extends RemoteCallbackList<T> { 443 @Override 444 public void onCallbackDied(T callback, Object cookie) { 445 checkCallbackCount(); 446 } 447 } 448 } 449}