| /* |
| * Copyright (C) 2012 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.location; |
| |
| import android.content.Context; |
| import android.database.ContentObserver; |
| import android.os.Handler; |
| import android.os.UserHandle; |
| import android.provider.Settings; |
| import android.util.Log; |
| import android.util.Slog; |
| |
| import com.android.server.LocationManagerService; |
| |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| |
| /** |
| * Allows applications to be blacklisted from location updates at run-time. |
| * |
| * This is a silent blacklist. Applications can still call Location Manager |
| * API's, but they just won't receive any locations. |
| */ |
| public final class LocationBlacklist extends ContentObserver { |
| private static final String TAG = "LocationBlacklist"; |
| private static final boolean D = LocationManagerService.D; |
| private static final String BLACKLIST_CONFIG_NAME = "locationPackagePrefixBlacklist"; |
| private static final String WHITELIST_CONFIG_NAME = "locationPackagePrefixWhitelist"; |
| |
| private final Context mContext; |
| private final Object mLock = new Object(); |
| |
| // all fields below synchronized on mLock |
| private String[] mWhitelist = new String[0]; |
| private String[] mBlacklist = new String[0]; |
| |
| private int mCurrentUserId = UserHandle.USER_OWNER; |
| |
| public LocationBlacklist(Context context, Handler handler) { |
| super(handler); |
| mContext = context; |
| } |
| |
| public void init() { |
| mContext.getContentResolver().registerContentObserver(Settings.Secure.getUriFor( |
| BLACKLIST_CONFIG_NAME), false, this, UserHandle.USER_ALL); |
| // mContext.getContentResolver().registerContentObserver(Settings.Secure.getUriFor( |
| // WHITELIST_CONFIG_NAME), false, this, UserHandle.USER_ALL); |
| reloadBlacklist(); |
| } |
| |
| private void reloadBlacklistLocked() { |
| mWhitelist = getStringArrayLocked(WHITELIST_CONFIG_NAME); |
| if (D) Slog.d(TAG, "whitelist: " + Arrays.toString(mWhitelist)); |
| mBlacklist = getStringArrayLocked(BLACKLIST_CONFIG_NAME); |
| if (D) Slog.d(TAG, "blacklist: " + Arrays.toString(mBlacklist)); |
| } |
| |
| private void reloadBlacklist() { |
| synchronized (mLock) { |
| reloadBlacklistLocked(); |
| } |
| } |
| |
| /** |
| * Return true if in blacklist |
| * (package name matches blacklist, and does not match whitelist) |
| */ |
| public boolean isBlacklisted(String packageName) { |
| synchronized (mLock) { |
| for (String black : mBlacklist) { |
| if (packageName.startsWith(black)) { |
| if (inWhitelist(packageName)) { |
| continue; |
| } else { |
| if (D) Log.d(TAG, "dropping location (blacklisted): " |
| + packageName + " matches " + black); |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Return true if any of packages are in whitelist |
| */ |
| private boolean inWhitelist(String pkg) { |
| synchronized (mLock) { |
| for (String white : mWhitelist) { |
| if (pkg.startsWith(white)) return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public void onChange(boolean selfChange) { |
| reloadBlacklist(); |
| } |
| |
| public void switchUser(int userId) { |
| synchronized(mLock) { |
| mCurrentUserId = userId; |
| reloadBlacklistLocked(); |
| } |
| } |
| |
| private String[] getStringArrayLocked(String key) { |
| String flatString; |
| synchronized(mLock) { |
| flatString = Settings.Secure.getStringForUser(mContext.getContentResolver(), key, |
| mCurrentUserId); |
| } |
| if (flatString == null) { |
| return new String[0]; |
| } |
| String[] splitStrings = flatString.split(","); |
| ArrayList<String> result = new ArrayList<String>(); |
| for (String pkg : splitStrings) { |
| pkg = pkg.trim(); |
| if (pkg.isEmpty()) { |
| continue; |
| } |
| result.add(pkg); |
| } |
| return result.toArray(new String[result.size()]); |
| } |
| |
| public void dump(PrintWriter pw) { |
| pw.println("mWhitelist=" + Arrays.toString(mWhitelist) + " mBlacklist=" + |
| Arrays.toString(mBlacklist)); |
| } |
| } |