| /* |
| * Copyright (C) 2018 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.systemui.appops; |
| |
| import android.app.AppOpsManager; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.UserHandle; |
| import android.util.ArrayMap; |
| import android.util.ArraySet; |
| import android.util.Log; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.systemui.DumpController; |
| import com.android.systemui.Dumpable; |
| import com.android.systemui.dagger.qualifiers.Background; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import javax.inject.Inject; |
| import javax.inject.Singleton; |
| |
| /** |
| * Controller to keep track of applications that have requested access to given App Ops |
| * |
| * It can be subscribed to with callbacks. Additionally, it passes on the information to |
| * NotificationPresenter to be displayed to the user. |
| */ |
| @Singleton |
| public class AppOpsControllerImpl implements AppOpsController, |
| AppOpsManager.OnOpActiveChangedInternalListener, |
| AppOpsManager.OnOpNotedListener, Dumpable { |
| |
| // This is the minimum time that we will keep AppOps that are noted on record. If multiple |
| // occurrences of the same (op, package, uid) happen in a shorter interval, they will not be |
| // notified to listeners. |
| private static final long NOTED_OP_TIME_DELAY_MS = 5000; |
| private static final String TAG = "AppOpsControllerImpl"; |
| private static final boolean DEBUG = false; |
| private final Context mContext; |
| |
| private final AppOpsManager mAppOps; |
| private H mBGHandler; |
| private final List<AppOpsController.Callback> mCallbacks = new ArrayList<>(); |
| private final ArrayMap<Integer, Set<Callback>> mCallbacksByCode = new ArrayMap<>(); |
| private final PermissionFlagsCache mFlagsCache; |
| private boolean mListening; |
| |
| @GuardedBy("mActiveItems") |
| private final List<AppOpItem> mActiveItems = new ArrayList<>(); |
| @GuardedBy("mNotedItems") |
| private final List<AppOpItem> mNotedItems = new ArrayList<>(); |
| |
| protected static final int[] OPS = new int[] { |
| AppOpsManager.OP_CAMERA, |
| AppOpsManager.OP_SYSTEM_ALERT_WINDOW, |
| AppOpsManager.OP_RECORD_AUDIO, |
| AppOpsManager.OP_COARSE_LOCATION, |
| AppOpsManager.OP_FINE_LOCATION |
| }; |
| |
| @Inject |
| public AppOpsControllerImpl(Context context, @Background Looper bgLooper, |
| DumpController dumpController) { |
| this(context, bgLooper, new PermissionFlagsCache(context), dumpController); |
| } |
| |
| @VisibleForTesting |
| protected AppOpsControllerImpl(Context context, Looper bgLooper, PermissionFlagsCache cache, |
| DumpController dumpController) { |
| mContext = context; |
| mAppOps = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE); |
| mFlagsCache = cache; |
| mBGHandler = new H(bgLooper); |
| final int numOps = OPS.length; |
| for (int i = 0; i < numOps; i++) { |
| mCallbacksByCode.put(OPS[i], new ArraySet<>()); |
| } |
| dumpController.registerDumpable(TAG, this); |
| } |
| |
| @VisibleForTesting |
| protected void setBGHandler(H handler) { |
| mBGHandler = handler; |
| } |
| |
| @VisibleForTesting |
| protected void setListening(boolean listening) { |
| mListening = listening; |
| if (listening) { |
| mAppOps.startWatchingActive(OPS, this); |
| mAppOps.startWatchingNoted(OPS, this); |
| } else { |
| mAppOps.stopWatchingActive(this); |
| mAppOps.stopWatchingNoted(this); |
| mBGHandler.removeCallbacksAndMessages(null); // null removes all |
| synchronized (mActiveItems) { |
| mActiveItems.clear(); |
| } |
| synchronized (mNotedItems) { |
| mNotedItems.clear(); |
| } |
| } |
| } |
| |
| /** |
| * Adds a callback that will get notifified when an AppOp of the type the controller tracks |
| * changes |
| * |
| * @param callback Callback to report changes |
| * @param opsCodes App Ops the callback is interested in checking |
| * |
| * @see #removeCallback(int[], Callback) |
| */ |
| @Override |
| public void addCallback(int[] opsCodes, AppOpsController.Callback callback) { |
| boolean added = false; |
| final int numCodes = opsCodes.length; |
| for (int i = 0; i < numCodes; i++) { |
| if (mCallbacksByCode.containsKey(opsCodes[i])) { |
| mCallbacksByCode.get(opsCodes[i]).add(callback); |
| added = true; |
| } else { |
| if (DEBUG) Log.wtf(TAG, "APP_OP " + opsCodes[i] + " not supported"); |
| } |
| } |
| if (added) mCallbacks.add(callback); |
| if (!mCallbacks.isEmpty()) setListening(true); |
| } |
| |
| /** |
| * Removes a callback from those notified when an AppOp of the type the controller tracks |
| * changes |
| * |
| * @param callback Callback to stop reporting changes |
| * @param opsCodes App Ops the callback was interested in checking |
| * |
| * @see #addCallback(int[], Callback) |
| */ |
| @Override |
| public void removeCallback(int[] opsCodes, AppOpsController.Callback callback) { |
| final int numCodes = opsCodes.length; |
| for (int i = 0; i < numCodes; i++) { |
| if (mCallbacksByCode.containsKey(opsCodes[i])) { |
| mCallbacksByCode.get(opsCodes[i]).remove(callback); |
| } |
| } |
| mCallbacks.remove(callback); |
| if (mCallbacks.isEmpty()) setListening(false); |
| } |
| |
| // Find item number in list, only call if the list passed is locked |
| private AppOpItem getAppOpItemLocked(List<AppOpItem> appOpList, int code, int uid, |
| String packageName) { |
| final int itemsQ = appOpList.size(); |
| for (int i = 0; i < itemsQ; i++) { |
| AppOpItem item = appOpList.get(i); |
| if (item.getCode() == code && item.getUid() == uid |
| && item.getPackageName().equals(packageName)) { |
| return item; |
| } |
| } |
| return null; |
| } |
| |
| private boolean updateActives(int code, int uid, String packageName, boolean active) { |
| synchronized (mActiveItems) { |
| AppOpItem item = getAppOpItemLocked(mActiveItems, code, uid, packageName); |
| if (item == null && active) { |
| item = new AppOpItem(code, uid, packageName, System.currentTimeMillis()); |
| mActiveItems.add(item); |
| if (DEBUG) Log.w(TAG, "Added item: " + item.toString()); |
| return true; |
| } else if (item != null && !active) { |
| mActiveItems.remove(item); |
| if (DEBUG) Log.w(TAG, "Removed item: " + item.toString()); |
| return true; |
| } |
| return false; |
| } |
| } |
| |
| private void removeNoted(int code, int uid, String packageName) { |
| AppOpItem item; |
| synchronized (mNotedItems) { |
| item = getAppOpItemLocked(mNotedItems, code, uid, packageName); |
| if (item == null) return; |
| mNotedItems.remove(item); |
| if (DEBUG) Log.w(TAG, "Removed item: " + item.toString()); |
| } |
| notifySuscribers(code, uid, packageName, false); |
| } |
| |
| private boolean addNoted(int code, int uid, String packageName) { |
| AppOpItem item; |
| boolean createdNew = false; |
| synchronized (mNotedItems) { |
| item = getAppOpItemLocked(mNotedItems, code, uid, packageName); |
| if (item == null) { |
| item = new AppOpItem(code, uid, packageName, System.currentTimeMillis()); |
| mNotedItems.add(item); |
| if (DEBUG) Log.w(TAG, "Added item: " + item.toString()); |
| createdNew = true; |
| } |
| } |
| mBGHandler.scheduleRemoval(item, NOTED_OP_TIME_DELAY_MS); |
| return createdNew; |
| } |
| |
| /** |
| * Does the app-op code refer to a user sensitive permission for the specified user id |
| * and package. Only user sensitive permission should be shown to the user by default. |
| * |
| * @param appOpCode The code of the app-op. |
| * @param uid The uid of the user. |
| * @param packageName The name of the package. |
| * |
| * @return {@code true} iff the app-op item is user sensitive |
| */ |
| private boolean isUserSensitive(int appOpCode, int uid, String packageName) { |
| String permission = AppOpsManager.opToPermission(appOpCode); |
| if (permission == null) { |
| return false; |
| } |
| int permFlags = mFlagsCache.getPermissionFlags(permission, |
| packageName, UserHandle.getUserHandleForUid(uid)); |
| return (permFlags & PackageManager.FLAG_PERMISSION_USER_SENSITIVE_WHEN_GRANTED) != 0; |
| } |
| |
| /** |
| * Does the app-op item refer to an operation that should be shown to the user. |
| * Only specficic ops (like SYSTEM_ALERT_WINDOW) or ops that refer to user sensitive |
| * permission should be shown to the user by default. |
| * |
| * @param item The item |
| * |
| * @return {@code true} iff the app-op item should be shown to the user |
| */ |
| private boolean isUserVisible(AppOpItem item) { |
| return isUserVisible(item.getCode(), item.getUid(), item.getPackageName()); |
| } |
| |
| |
| /** |
| * Does the app-op, uid and package name, refer to an operation that should be shown to the |
| * user. Only specficic ops (like {@link AppOpsManager.OP_SYSTEM_ALERT_WINDOW}) or |
| * ops that refer to user sensitive permission should be shown to the user by default. |
| * |
| * @param item The item |
| * |
| * @return {@code true} iff the app-op for should be shown to the user |
| */ |
| private boolean isUserVisible(int appOpCode, int uid, String packageName) { |
| // currently OP_SYSTEM_ALERT_WINDOW does not correspond to a platform permission |
| // which may be user senstive, so for now always show it to the user. |
| if (appOpCode == AppOpsManager.OP_SYSTEM_ALERT_WINDOW) { |
| return true; |
| } |
| |
| return isUserSensitive(appOpCode, uid, packageName); |
| } |
| |
| /** |
| * Returns a copy of the list containing all the active AppOps that the controller tracks. |
| * |
| * @return List of active AppOps information |
| */ |
| public List<AppOpItem> getActiveAppOps() { |
| return getActiveAppOpsForUser(UserHandle.USER_ALL); |
| } |
| |
| /** |
| * Returns a copy of the list containing all the active AppOps that the controller tracks, for |
| * a given user id. |
| * |
| * @param userId User id to track, can be {@link UserHandle#USER_ALL} |
| * |
| * @return List of active AppOps information for that user id |
| */ |
| public List<AppOpItem> getActiveAppOpsForUser(int userId) { |
| List<AppOpItem> list = new ArrayList<>(); |
| synchronized (mActiveItems) { |
| final int numActiveItems = mActiveItems.size(); |
| for (int i = 0; i < numActiveItems; i++) { |
| AppOpItem item = mActiveItems.get(i); |
| if ((userId == UserHandle.USER_ALL || UserHandle.getUserId(item.getUid()) == userId) |
| && isUserVisible(item)) { |
| list.add(item); |
| } |
| } |
| } |
| synchronized (mNotedItems) { |
| final int numNotedItems = mNotedItems.size(); |
| for (int i = 0; i < numNotedItems; i++) { |
| AppOpItem item = mNotedItems.get(i); |
| if ((userId == UserHandle.USER_ALL || UserHandle.getUserId(item.getUid()) == userId) |
| && isUserVisible(item)) { |
| list.add(item); |
| } |
| } |
| } |
| return list; |
| } |
| |
| @Override |
| public void onOpActiveChanged(int code, int uid, String packageName, boolean active) { |
| if (updateActives(code, uid, packageName, active)) { |
| mBGHandler.post(() -> notifySuscribers(code, uid, packageName, active)); |
| } |
| } |
| |
| @Override |
| public void onOpNoted(int code, int uid, String packageName, int result) { |
| if (DEBUG) { |
| Log.w(TAG, "Op: " + code + " with result " + AppOpsManager.MODE_NAMES[result]); |
| } |
| if (result != AppOpsManager.MODE_ALLOWED) return; |
| if (addNoted(code, uid, packageName)) { |
| mBGHandler.post(() -> notifySuscribers(code, uid, packageName, true)); |
| } |
| } |
| |
| private void notifySuscribers(int code, int uid, String packageName, boolean active) { |
| if (mCallbacksByCode.containsKey(code) |
| && isUserVisible(code, uid, packageName)) { |
| if (DEBUG) Log.d(TAG, "Notifying of change in package " + packageName); |
| for (Callback cb: mCallbacksByCode.get(code)) { |
| cb.onActiveStateChanged(code, uid, packageName, active); |
| } |
| } |
| } |
| |
| @Override |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| pw.println("AppOpsController state:"); |
| pw.println(" Listening: " + mListening); |
| pw.println(" Active Items:"); |
| for (int i = 0; i < mActiveItems.size(); i++) { |
| final AppOpItem item = mActiveItems.get(i); |
| pw.print(" "); pw.println(item.toString()); |
| } |
| pw.println(" Noted Items:"); |
| for (int i = 0; i < mNotedItems.size(); i++) { |
| final AppOpItem item = mNotedItems.get(i); |
| pw.print(" "); pw.println(item.toString()); |
| } |
| |
| } |
| |
| protected final class H extends Handler { |
| H(Looper looper) { |
| super(looper); |
| } |
| |
| public void scheduleRemoval(AppOpItem item, long timeToRemoval) { |
| removeCallbacksAndMessages(item); |
| postDelayed(new Runnable() { |
| @Override |
| public void run() { |
| removeNoted(item.getCode(), item.getUid(), item.getPackageName()); |
| } |
| }, item, timeToRemoval); |
| } |
| } |
| } |