/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.pm;
import android.app.AppGlobals;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ILauncherApps;
import android.content.pm.IOnAppsChangedListener;
import android.content.pm.IPackageManager;
import android.content.pm.PackageManager;
import android.content.pm.PackageInfo;
import android.content.pm.ResolveInfo;
import android.content.pm.UserInfo;
import android.graphics.Rect;
import android.net.Uri;
import android.os.Binder;
import android.os.Bundle;
import android.os.IInterface;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.os.UserHandle;
import android.os.UserManager;
import android.provider.Settings;
import android.util.Log;
import android.util.Slog;
import com.android.internal.content.PackageMonitor;
import com.android.server.SystemService;
import java.util.ArrayList;
import java.util.List;
/**
* Service that manages requests and callbacks for launchers that support
* managed profiles.
*/
public class LauncherAppsService extends SystemService {
private final LauncherAppsImpl mLauncherAppsImpl;
public LauncherAppsService(Context context) {
super(context);
mLauncherAppsImpl = new LauncherAppsImpl(context);
}
@Override
public void onStart() {
publishBinderService(Context.LAUNCHER_APPS_SERVICE, mLauncherAppsImpl);
}
class LauncherAppsImpl extends ILauncherApps.Stub {
private static final boolean DEBUG = false;
private static final String TAG = "LauncherAppsService";
private final Context mContext;
private final PackageManager mPm;
private final UserManager mUm;
private final PackageCallbackList<IOnAppsChangedListener> mListeners
= new PackageCallbackList<IOnAppsChangedListener>();
private MyPackageMonitor mPackageMonitor = new MyPackageMonitor();
public LauncherAppsImpl(Context context) {
mContext = context;
mPm = mContext.getPackageManager();
mUm = (UserManager) mContext.getSystemService(Context.USER_SERVICE);
}
/*
* @see android.content.pm.ILauncherApps#addOnAppsChangedListener(
* android.content.pm.IOnAppsChangedListener)
*/
@Override
public void addOnAppsChangedListener(IOnAppsChangedListener listener) throws RemoteException {
synchronized (mListeners) {
if (DEBUG) {
Log.d(TAG, "Adding listener from " + Binder.getCallingUserHandle());
}
if (mListeners.getRegisteredCallbackCount() == 0) {
if (DEBUG) {
Log.d(TAG, "Starting package monitoring");
}
startWatchingPackageBroadcasts();
}
mListeners.unregister(listener);
mListeners.register(listener, Binder.getCallingUserHandle());
}
}
/*
* @see android.content.pm.ILauncherApps#removeOnAppsChangedListener(
* android.content.pm.IOnAppsChangedListener)
*/
@Override
public void removeOnAppsChangedListener(IOnAppsChangedListener listener)
throws RemoteException {
synchronized (mListeners) {
if (DEBUG) {
Log.d(TAG, "Removing listener from " + Binder.getCallingUserHandle());
}
mListeners.unregister(listener);
if (mListeners.getRegisteredCallbackCount() == 0) {
stopWatchingPackageBroadcasts();
}
}
}
/**
* Register a receiver to watch for package broadcasts
*/
private void startWatchingPackageBroadcasts() {
mPackageMonitor.register(mContext, null, UserHandle.ALL, true);
}
/**
* Unregister package broadcast receiver
*/
private void stopWatchingPackageBroadcasts() {
if (DEBUG) {
Log.d(TAG, "Stopped watching for packages");
}
mPackageMonitor.unregister();
}
void checkCallbackCount() {
synchronized (mListeners) {
if (DEBUG) {
Log.d(TAG, "Callback count = " + mListeners.getRegisteredCallbackCount());
}
if (mListeners.getRegisteredCallbackCount() == 0) {
stopWatchingPackageBroadcasts();
}
}
}
/**
* Checks if the caller is in the same group as the userToCheck.
*/
private void ensureInUserProfiles(UserHandle userToCheck, String message) {
final int callingUserId = UserHandle.getCallingUserId();
final int targetUserId = userToCheck.getIdentifier();
if (targetUserId == callingUserId) return;
long ident = Binder.clearCallingIdentity();
try {
UserInfo callingUserInfo = mUm.getUserInfo(callingUserId);
UserInfo targetUserInfo = mUm.getUserInfo(targetUserId);
if (targetUserInfo == null
|| targetUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID
|| targetUserInfo.profileGroupId != callingUserInfo.profileGroupId) {
throw new SecurityException(message);
}
} finally {
Binder.restoreCallingIdentity(ident);
}
}
/**
* Checks if the user is enabled.
*/
private boolean isUserEnabled(UserHandle user) {
long ident = Binder.clearCallingIdentity();
try {
UserInfo targetUserInfo = mUm.getUserInfo(user.getIdentifier());
return targetUserInfo != null && targetUserInfo.isEnabled();
} finally {
Binder.restoreCallingIdentity(ident);
}
}
@Override
public List<ResolveInfo> getLauncherActivities(String packageName, UserHandle user)
throws RemoteException {
ensureInUserProfiles(user, "Cannot retrieve activities for unrelated profile " + user);
if (!isUserEnabled(user)) {
return new ArrayList<ResolveInfo>();
}
final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
mainIntent.setPackage(packageName);
long ident = Binder.clearCallingIdentity();
try {
List<ResolveInfo> apps = mPm.queryIntentActivitiesAsUser(mainIntent, 0 /* flags */,
user.getIdentifier());
return apps;
} finally {
Binder.restoreCallingIdentity(ident);
}
}
@Override
public ResolveInfo resolveActivity(Intent intent, UserHandle user)
throws RemoteException {
ensureInUserProfiles(user, "Cannot resolve activity for unrelated profile " + user);
if (!isUserEnabled(user)) {
return null;
}
long ident = Binder.clearCallingIdentity();
try {
ResolveInfo app = mPm.resolveActivityAsUser(intent, 0, user.getIdentifier());
return app;
} finally {
Binder.restoreCallingIdentity(ident);
}
}
@Override
public boolean isPackageEnabled(String packageName, UserHandle user)
throws RemoteException {
ensureInUserProfiles(user, "Cannot check package for unrelated profile " + user);
if (!isUserEnabled(user)) {
return false;
}
long ident = Binder.clearCallingIdentity();
try {
IPackageManager pm = AppGlobals.getPackageManager();
PackageInfo info = pm.getPackageInfo(packageName, 0, user.getIdentifier());
return info != null && info.applicationInfo.enabled;
} finally {
Binder.restoreCallingIdentity(ident);
}
}
@Override
public boolean isActivityEnabled(ComponentName component, UserHandle user)
throws RemoteException {
ensureInUserProfiles(user, "Cannot check component for unrelated profile " + user);
if (!isUserEnabled(user)) {
return false;
}
long ident = Binder.clearCallingIdentity();
try {
IPackageManager pm = AppGlobals.getPackageManager();
ActivityInfo info = pm.getActivityInfo(component, 0, user.getIdentifier());
return info != null;
} finally {
Binder.restoreCallingIdentity(ident);
}
}
@Override
public void startActivityAsUser(ComponentName component, Rect sourceBounds,
Bundle opts, UserHandle user) throws RemoteException {
ensureInUserProfiles(user, "Cannot start activity for unrelated profile " + user);
if (!isUserEnabled(user)) {
throw new IllegalStateException("Cannot start activity for disabled profile " + user);
}
Intent launchIntent = new Intent(Intent.ACTION_MAIN);
launchIntent.addCategory(Intent.CATEGORY_LAUNCHER);
launchIntent.setSourceBounds(sourceBounds);
launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
launchIntent.setPackage(component.getPackageName());
long ident = Binder.clearCallingIdentity();
try {
IPackageManager pm = AppGlobals.getPackageManager();
ActivityInfo info = pm.getActivityInfo(component, 0, user.getIdentifier());
if (!info.exported) {
throw new SecurityException("Cannot launch non-exported components "
+ component);
}
// Check that the component actually has Intent.CATEGORY_LAUCNCHER
// as calling startActivityAsUser ignores the category and just
// resolves based on the component if present.
List<ResolveInfo> apps = mPm.queryIntentActivitiesAsUser(launchIntent,
0 /* flags */, user.getIdentifier());
final int size = apps.size();
for (int i = 0; i < size; ++i) {
ActivityInfo activityInfo = apps.get(i).activityInfo;
if (activityInfo.packageName.equals(component.getPackageName()) &&
activityInfo.name.equals(component.getClassName())) {
// Found an activity with category launcher that matches
// this component so ok to launch.
launchIntent.setComponent(component);
mContext.startActivityAsUser(launchIntent, opts, user);
return;
}
}
throw new SecurityException("Attempt to launch activity without "
+ " category Intent.CATEGORY_LAUNCHER " + component);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
@Override
public void showAppDetailsAsUser(ComponentName component, Rect sourceBounds,
Bundle opts, UserHandle user) throws RemoteException {
ensureInUserProfiles(user, "Cannot show app details for unrelated profile " + user);
if (!isUserEnabled(user)) {
throw new IllegalStateException("Cannot show app details for disabled profile "
+ user);
}
long ident = Binder.clearCallingIdentity();
try {
String packageName = component.getPackageName();
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
Uri.fromParts("package", packageName, null));
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK |
Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
intent.setSourceBounds(sourceBounds);
mContext.startActivityAsUser(intent, opts, user);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
private class MyPackageMonitor extends PackageMonitor {
/** Checks if user is a profile of or same as listeningUser.
* and the user is enabled. */
private boolean isEnabledProfileOf(UserHandle user, UserHandle listeningUser,
String debugMsg) {
if (user.getIdentifier() == listeningUser.getIdentifier()) {
if (DEBUG) Log.d(TAG, "Delivering msg to same user " + debugMsg);
return true;
}
long ident = Binder.clearCallingIdentity();
try {
UserInfo userInfo = mUm.getUserInfo(user.getIdentifier());
UserInfo listeningUserInfo = mUm.getUserInfo(listeningUser.getIdentifier());
if (userInfo == null || listeningUserInfo == null
|| userInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID
|| userInfo.profileGroupId != listeningUserInfo.profileGroupId
|| !userInfo.isEnabled()) {
if (DEBUG) {
Log.d(TAG, "Not delivering msg from " + user + " to " + listeningUser + ":"
+ debugMsg);
}
return false;
} else {
if (DEBUG) {
Log.d(TAG, "Delivering msg from " + user + " to " + listeningUser + ":"
+ debugMsg);
}
return true;
}
} finally {
Binder.restoreCallingIdentity(ident);
}
}
@Override
public void onPackageAdded(String packageName, int uid) {
UserHandle user = new UserHandle(getChangingUserId());
final int n = mListeners.beginBroadcast();
for (int i = 0; i < n; i++) {
IOnAppsChangedListener listener = mListeners.getBroadcastItem(i);
UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i);
if (!isEnabledProfileOf(user, listeningUser, "onPackageAdded")) continue;
try {
listener.onPackageAdded(user, packageName);
} catch (RemoteException re) {
Slog.d(TAG, "Callback failed ", re);
}
}
mListeners.finishBroadcast();
super.onPackageAdded(packageName, uid);
}
@Override
public void onPackageRemoved(String packageName, int uid) {
UserHandle user = new UserHandle(getChangingUserId());
final int n = mListeners.beginBroadcast();
for (int i = 0; i < n; i++) {
IOnAppsChangedListener listener = mListeners.getBroadcastItem(i);
UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i);
if (!isEnabledProfileOf(user, listeningUser, "onPackageRemoved")) continue;
try {
listener.onPackageRemoved(user, packageName);
} catch (RemoteException re) {
Slog.d(TAG, "Callback failed ", re);
}
}
mListeners.finishBroadcast();
super.onPackageRemoved(packageName, uid);
}
@Override
public void onPackageModified(String packageName) {
UserHandle user = new UserHandle(getChangingUserId());
final int n = mListeners.beginBroadcast();
for (int i = 0; i < n; i++) {
IOnAppsChangedListener listener = mListeners.getBroadcastItem(i);
UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i);
if (!isEnabledProfileOf(user, listeningUser, "onPackageModified")) continue;
try {
listener.onPackageChanged(user, packageName);
} catch (RemoteException re) {
Slog.d(TAG, "Callback failed ", re);
}
}
mListeners.finishBroadcast();
super.onPackageModified(packageName);
}
@Override
public void onPackagesAvailable(String[] packages) {
UserHandle user = new UserHandle(getChangingUserId());
final int n = mListeners.beginBroadcast();
for (int i = 0; i < n; i++) {
IOnAppsChangedListener listener = mListeners.getBroadcastItem(i);
UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i);
if (!isEnabledProfileOf(user, listeningUser, "onPackagesAvailable")) continue;
try {
listener.onPackagesAvailable(user, packages, isReplacing());
} catch (RemoteException re) {
Slog.d(TAG, "Callback failed ", re);
}
}
mListeners.finishBroadcast();
super.onPackagesAvailable(packages);
}
@Override
public void onPackagesUnavailable(String[] packages) {
UserHandle user = new UserHandle(getChangingUserId());
final int n = mListeners.beginBroadcast();
for (int i = 0; i < n; i++) {
IOnAppsChangedListener listener = mListeners.getBroadcastItem(i);
UserHandle listeningUser = (UserHandle) mListeners.getBroadcastCookie(i);
if (!isEnabledProfileOf(user, listeningUser, "onPackagesUnavailable")) continue;
try {
listener.onPackagesUnavailable(user, packages, isReplacing());
} catch (RemoteException re) {
Slog.d(TAG, "Callback failed ", re);
}
}
mListeners.finishBroadcast();
super.onPackagesUnavailable(packages);
}
}
class PackageCallbackList<T extends IInterface> extends RemoteCallbackList<T> {
@Override
public void onCallbackDied(T callback, Object cookie) {
checkCallbackCount();
}
}
}
}