| /* |
| * Copyright (C) 2017 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 android.telephony.mbms; |
| |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.content.pm.*; |
| import android.content.pm.ServiceInfo; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.List; |
| |
| /** |
| * @hide |
| */ |
| public class MbmsUtils { |
| private static final String LOG_TAG = "MbmsUtils"; |
| |
| public static boolean isContainedIn(File parent, File child) { |
| try { |
| String parentPath = parent.getCanonicalPath(); |
| String childPath = child.getCanonicalPath(); |
| return childPath.startsWith(parentPath); |
| } catch (IOException e) { |
| throw new RuntimeException("Failed to resolve canonical paths: " + e); |
| } |
| } |
| |
| public static ComponentName toComponentName(ComponentInfo ci) { |
| return new ComponentName(ci.packageName, ci.name); |
| } |
| |
| public static ServiceInfo getMiddlewareServiceInfo(Context context, String serviceAction) { |
| // Query for the proper service |
| PackageManager packageManager = context.getPackageManager(); |
| Intent queryIntent = new Intent(); |
| queryIntent.setAction(serviceAction); |
| List<ResolveInfo> downloadServices = packageManager.queryIntentServices(queryIntent, |
| PackageManager.MATCH_SYSTEM_ONLY); |
| |
| if (downloadServices == null || downloadServices.size() == 0) { |
| Log.w(LOG_TAG, "No download services found, cannot get service info"); |
| return null; |
| } |
| |
| if (downloadServices.size() > 1) { |
| Log.w(LOG_TAG, "More than one download service found, cannot get unique service"); |
| return null; |
| } |
| return downloadServices.get(0).serviceInfo; |
| } |
| |
| public static void startBinding(Context context, String serviceAction, |
| ServiceConnection serviceConnection) throws MbmsException { |
| Intent bindIntent = new Intent(); |
| ServiceInfo mbmsServiceInfo = |
| MbmsUtils.getMiddlewareServiceInfo(context, serviceAction); |
| |
| if (mbmsServiceInfo == null) { |
| throw new MbmsException(MbmsException.ERROR_NO_UNIQUE_MIDDLEWARE); |
| } |
| |
| bindIntent.setComponent(MbmsUtils.toComponentName(mbmsServiceInfo)); |
| |
| context.bindService(bindIntent, serviceConnection, Context.BIND_AUTO_CREATE); |
| } |
| |
| /** |
| * Returns a File linked to the directory used to store temp files for this file service |
| */ |
| public static File getEmbmsTempFileDirForService(Context context, String serviceId) { |
| File embmsTempFileDir = MbmsTempFileProvider.getEmbmsTempFileDir(context); |
| |
| return new File(embmsTempFileDir, serviceId); |
| } |
| } |