Merge "Merge "Embms download setup" am: da5b77fa9b am: a807ee8f1c am:... (6e1e2090) · Commits · e / os / android_frameworks_base

telephony/java/android/telephony/MbmsDownloadManager.java

+52 −9

Original line number	Original line	Diff line number	Diff line
	@@ -16,19 +16,24 @@

	package android.telephony;		package android.telephony;

			import android.content.ComponentName;
	import android.content.Context;		import android.content.Context;
	import android.content.Intent;		import android.content.Intent;
			import android.content.ServiceConnection;
	import android.net.Uri;		import android.net.Uri;
			import android.os.IBinder;
	import android.os.RemoteException;		import android.os.RemoteException;
	import android.telephony.mbms.IDownloadCallback;		import android.telephony.mbms.IDownloadCallback;
	import android.telephony.mbms.DownloadRequest;		import android.telephony.mbms.DownloadRequest;
	import android.telephony.mbms.DownloadStatus;		import android.telephony.mbms.DownloadStatus;
	import android.telephony.mbms.IMbmsDownloadManagerCallback;		import android.telephony.mbms.IMbmsDownloadManagerCallback;
	import android.telephony.mbms.MbmsException;		import android.telephony.mbms.MbmsException;
			import android.telephony.mbms.MbmsUtils;
	import android.telephony.mbms.vendor.IMbmsDownloadService;		import android.telephony.mbms.vendor.IMbmsDownloadService;
	import android.util.Log;		import android.util.Log;

	import java.util.List;		import java.util.List;
			import java.util.concurrent.CountDownLatch;

	import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;		import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;

	@@ -36,6 +41,8 @@ import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
	public class MbmsDownloadManager {		public class MbmsDownloadManager {
	private static final String LOG_TAG = MbmsDownloadManager.class.getSimpleName();		private static final String LOG_TAG = MbmsDownloadManager.class.getSimpleName();

			public static final String MBMS_DOWNLOAD_SERVICE_ACTION =
			"android.telephony.action.EmbmsDownload";
	/**		/**
	* The MBMS middleware should send this when a download of single file has completed or		* The MBMS middleware should send this when a download of single file has completed or
	* failed. Mandatory extras are		* failed. Mandatory extras are
	@@ -76,15 +83,15 @@ public class MbmsDownloadManager {
	"android.telephony.mbms.action.CLEANUP";		"android.telephony.mbms.action.CLEANUP";

	/**		/**
	* Integer extra indicating the result code of the download.		* Integer extra indicating the result code of the download. One of
	* TODO: put in link to error list		* {@link #RESULT_SUCCESSFUL}, {@link #RESULT_EXPIRED}, or {@link #RESULT_CANCELLED}.
	* TODO: future systemapi (here and and all extras)
	*/		*/
	public static final String EXTRA_RESULT = "android.telephony.mbms.extra.RESULT";		public static final String EXTRA_RESULT = "android.telephony.mbms.extra.RESULT";

	/**		/**
	* Extra containing the {@link android.telephony.mbms.FileInfo} for which the download result		* Extra containing the {@link android.telephony.mbms.FileInfo} for which the download result
	* is for. Must not be null.		* is for. Must not be null.
			* TODO: future systemapi (here and and all extras) except the two for the app intent
	*/		*/
	public static final String EXTRA_INFO = "android.telephony.mbms.extra.INFO";		public static final String EXTRA_INFO = "android.telephony.mbms.extra.INFO";

	@@ -143,11 +150,23 @@ public class MbmsDownloadManager {
	public static final String EXTRA_TEMP_FILES_IN_USE =		public static final String EXTRA_TEMP_FILES_IN_USE =
	"android.telephony.mbms.extra.TEMP_FILES_IN_USE";		"android.telephony.mbms.extra.TEMP_FILES_IN_USE";

			/**
			* Extra containing a single {@link Uri} indicating the location of the successfully
			* downloaded file. Set on the intent provided via
			* {@link android.telephony.mbms.DownloadRequest.Builder#setAppIntent(Intent)}.
			* Will always be set to a non-null value if {@link #EXTRA_RESULT} is set to
			* {@link #RESULT_SUCCESSFUL}.
			*/
			public static final String EXTRA_COMPLETED_FILE_URI =
			"android.telephony.mbms.extra.COMPLETED_FILE_URI";

	public static final int RESULT_SUCCESSFUL = 1;		public static final int RESULT_SUCCESSFUL = 1;
	public static final int RESULT_CANCELLED = 2;		public static final int RESULT_CANCELLED = 2;
	public static final int RESULT_EXPIRED = 3;		public static final int RESULT_EXPIRED = 3;
	// TODO - more results!		// TODO - more results!

			private static final long BIND_TIMEOUT_MS = 3000;

	private final Context mContext;		private final Context mContext;
	private int mSubId = INVALID_SUBSCRIPTION_ID;		private int mSubId = INVALID_SUBSCRIPTION_ID;

	@@ -199,12 +218,31 @@ public class MbmsDownloadManager {
	}		}

	private void bindAndInitialize() throws MbmsException {		private void bindAndInitialize() throws MbmsException {
	// TODO: bind		// TODO: fold binding for download and streaming into a common utils class.
	try {		final CountDownLatch latch = new CountDownLatch(1);
	mService.initialize(mDownloadAppName, mSubId, mCallback);		ServiceConnection bindListener = new ServiceConnection() {
	} catch (RemoteException e) {		@Override
	throw new MbmsException(0); // TODO: proper error code		public void onServiceConnected(ComponentName name, IBinder service) {
			mService = IMbmsDownloadService.Stub.asInterface(service);
			latch.countDown();
	}		}

			@Override
			public void onServiceDisconnected(ComponentName name) {
			mService = null;
			}
			};

			Intent bindIntent = new Intent();
			bindIntent.setComponent(MbmsUtils.toComponentName(
			MbmsUtils.getMiddlewareServiceInfo(mContext, MBMS_DOWNLOAD_SERVICE_ACTION)));

			// Kick off the binding, and synchronously wait until binding is complete
			mContext.bindService(bindIntent, bindListener, Context.BIND_AUTO_CREATE);

			MbmsUtils.waitOnLatchWithTimeout(latch, BIND_TIMEOUT_MS);

			// TODO: initialize
	}		}

	/**		/**
	@@ -245,6 +283,11 @@ public class MbmsDownloadManager {
	*/		*/
	public DownloadRequest download(DownloadRequest request, IDownloadCallback listener) {		public DownloadRequest download(DownloadRequest request, IDownloadCallback listener) {
	request.setAppName(mDownloadAppName);		request.setAppName(mDownloadAppName);
			try {
			mService.download(request, listener);
			} catch (RemoteException e) {
			mService = null;
			}
	return request;		return request;
	}		}

telephony/java/android/telephony/MbmsStreamingManager.java

+12 −34

Original line number	Original line	Diff line number	Diff line
	@@ -27,6 +27,7 @@ import android.os.IBinder;
	import android.os.RemoteException;		import android.os.RemoteException;
	import android.telephony.mbms.MbmsException;		import android.telephony.mbms.MbmsException;
	import android.telephony.mbms.MbmsStreamingManagerCallback;		import android.telephony.mbms.MbmsStreamingManagerCallback;
			import android.telephony.mbms.MbmsUtils;
	import android.telephony.mbms.StreamingService;		import android.telephony.mbms.StreamingService;
	import android.telephony.mbms.StreamingServiceCallback;		import android.telephony.mbms.StreamingServiceCallback;
	import android.telephony.mbms.StreamingServiceInfo;		import android.telephony.mbms.StreamingServiceInfo;
	@@ -62,7 +63,9 @@ public class MbmsStreamingManager {
	Log.i(LOG_TAG, String.format("Connected to service %s", name));		Log.i(LOG_TAG, String.format("Connected to service %s", name));
	synchronized (MbmsStreamingManager.this) {		synchronized (MbmsStreamingManager.this) {
	mService = IMbmsStreamingService.Stub.asInterface(service);		mService = IMbmsStreamingService.Stub.asInterface(service);
	mServiceListeners.forEach(ServiceListener::onServiceConnected);		for (ServiceListener l : mServiceListeners) {
			l.onServiceConnected();
			}
	}		}
	}		}
	}		}
	@@ -72,10 +75,13 @@ public class MbmsStreamingManager {
	Log.i(LOG_TAG, String.format("Disconnected from service %s", name));		Log.i(LOG_TAG, String.format("Disconnected from service %s", name));
	synchronized (MbmsStreamingManager.this) {		synchronized (MbmsStreamingManager.this) {
	mService = null;		mService = null;
	mServiceListeners.forEach(ServiceListener::onServiceDisconnected);		for (ServiceListener l : mServiceListeners) {
			l.onServiceDisconnected();
			}
	}		}
	}		}
	};		};

	private List<ServiceListener> mServiceListeners = new LinkedList<>();		private List<ServiceListener> mServiceListeners = new LinkedList<>();

	private MbmsStreamingManagerCallback mCallbackToApp;		private MbmsStreamingManagerCallback mCallbackToApp;
	@@ -218,22 +224,6 @@ public class MbmsStreamingManager {
	}		}

	private void bindAndInitialize() throws MbmsException {		private void bindAndInitialize() throws MbmsException {
	// Query for the proper service
	PackageManager packageManager = mContext.getPackageManager();
	Intent queryIntent = new Intent();
	queryIntent.setAction(MBMS_STREAMING_SERVICE_ACTION);
	List<ResolveInfo> streamingServices = packageManager.queryIntentServices(queryIntent,
	PackageManager.MATCH_SYSTEM_ONLY);

	if (streamingServices == null \|\| streamingServices.size() == 0) {
	throw new MbmsException(
	MbmsException.ERROR_NO_SERVICE_INSTALLED);
	}
	if (streamingServices.size() > 1) {
	throw new MbmsException(
	MbmsException.ERROR_MULTIPLE_SERVICES_INSTALLED);
	}

	// Kick off the binding, and synchronously wait until binding is complete		// Kick off the binding, and synchronously wait until binding is complete
	final CountDownLatch latch = new CountDownLatch(1);		final CountDownLatch latch = new CountDownLatch(1);
	ServiceListener bindListener = new ServiceListener() {		ServiceListener bindListener = new ServiceListener() {
	@@ -252,11 +242,12 @@ public class MbmsStreamingManager {
	}		}

	Intent bindIntent = new Intent();		Intent bindIntent = new Intent();
	bindIntent.setComponent(streamingServices.get(0).getComponentInfo().getComponentName());		bindIntent.setComponent(MbmsUtils.toComponentName(
			MbmsUtils.getMiddlewareServiceInfo(mContext, MBMS_STREAMING_SERVICE_ACTION)));

	mContext.bindService(bindIntent, mServiceConnection, Context.BIND_AUTO_CREATE);		mContext.bindService(bindIntent, mServiceConnection, Context.BIND_AUTO_CREATE);

	waitOnLatchWithTimeout(latch, BIND_TIMEOUT_MS);		MbmsUtils.waitOnLatchWithTimeout(latch, BIND_TIMEOUT_MS);

	// Remove the listener and call the initialization method through the interface.		// Remove the listener and call the initialization method through the interface.
	synchronized (this) {		synchronized (this) {
	@@ -279,17 +270,4 @@ public class MbmsStreamingManager {
	}		}
	}		}

	private static void waitOnLatchWithTimeout(CountDownLatch l, long timeoutMs) {
	long endTime = System.currentTimeMillis() + timeoutMs;
	while (System.currentTimeMillis() < endTime) {
	try {
	l.await(timeoutMs, TimeUnit.MILLISECONDS);
	} catch (InterruptedException e) {
	// keep waiting
	}
	if (l.getCount() <= 0) {
	return;
	}
	}
	}
	}		}

telephony/java/android/telephony/mbms/MbmsDownloadReceiver.java

0 → 100644

+365 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* 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.BroadcastReceiver;
			import android.content.ContentResolver;
			import android.content.Context;
			import android.content.Intent;
			import android.content.pm.ApplicationInfo;
			import android.content.pm.PackageManager;
			import android.net.Uri;
			import android.os.Bundle;
			import android.telephony.MbmsDownloadManager;
			import android.util.Log;

			import java.io.File;
			import java.io.IOException;
			import java.util.ArrayList;
			import java.util.Iterator;
			import java.util.LinkedList;
			import java.util.List;
			import java.util.UUID;

			/**
			* @hide
			*/
			public class MbmsDownloadReceiver extends BroadcastReceiver {
			private static final String LOG_TAG = "MbmsDownloadReceiver";
			private static final String TEMP_FILE_SUFFIX = ".embms.temp";
			private static final int MAX_TEMP_FILE_RETRIES = 5;

			public static final String MBMS_FILE_PROVIDER_META_DATA_KEY = "mbms-file-provider-authority";

			private String mFileProviderAuthorityCache = null;
			private String mMiddlewarePackageNameCache = null;

			@Override
			public void onReceive(Context context, Intent intent) {
			if (!verifyIntentContents(intent)) {
			setResultCode(1 /* TODO: define error constants */);
			return;
			}

			if (MbmsDownloadManager.ACTION_DOWNLOAD_RESULT_INTERNAL.equals(intent.getAction())) {
			moveDownloadedFile(context, intent);
			cleanupPostMove(context, intent);
			} else if (MbmsDownloadManager.ACTION_FILE_DESCRIPTOR_REQUEST.equals(intent.getAction())) {
			generateTempFiles(context, intent);
			}
			// TODO: Add handling for ACTION_CLEANUP
			}

			private boolean verifyIntentContents(Intent intent) {
			if (MbmsDownloadManager.ACTION_DOWNLOAD_RESULT_INTERNAL.equals(intent.getAction())) {
			if (!intent.hasExtra(MbmsDownloadManager.EXTRA_RESULT)) {
			Log.w(LOG_TAG, "Download result did not include a result code. Ignoring.");
			return false;
			}
			if (!intent.hasExtra(MbmsDownloadManager.EXTRA_REQUEST)) {
			Log.w(LOG_TAG, "Download result did not include the associated request. Ignoring.");
			return false;
			}
			if (!intent.hasExtra(MbmsDownloadManager.EXTRA_INFO)) {
			Log.w(LOG_TAG, "Download result did not include the associated file info. " +
			"Ignoring.");
			return false;
			}
			if (!intent.hasExtra(MbmsDownloadManager.EXTRA_FINAL_URI)) {
			Log.w(LOG_TAG, "Download result did not include the path to the final " +
			"temp file. Ignoring.");
			return false;
			}
			return true;
			} else if (MbmsDownloadManager.ACTION_FILE_DESCRIPTOR_REQUEST.equals(intent.getAction())) {
			if (!intent.hasExtra(MbmsDownloadManager.EXTRA_REQUEST)) {
			Log.w(LOG_TAG, "Temp file request not include the associated request. Ignoring.");
			return false;
			}
			return true;
			}

			Log.w(LOG_TAG, "Received intent with unknown action: " + intent.getAction());
			return false;
			}

			private void moveDownloadedFile(Context context, Intent intent) {
			DownloadRequest request = intent.getParcelableExtra(MbmsDownloadManager.EXTRA_REQUEST);
			// TODO: check request against token
			Intent intentForApp = request.getIntentForApp();

			int result = intent.getIntExtra(MbmsDownloadManager.EXTRA_RESULT,
			MbmsDownloadManager.RESULT_CANCELLED);
			intentForApp.putExtra(MbmsDownloadManager.EXTRA_RESULT, result);

			if (result != MbmsDownloadManager.RESULT_SUCCESSFUL) {
			Log.i(LOG_TAG, "Download request indicated a failed download. Aborting.");
			context.sendBroadcast(intentForApp);
			return;
			}

			Uri destinationUri = request.getDestinationUri();
			Uri finalTempFile = intent.getParcelableExtra(MbmsDownloadManager.EXTRA_FINAL_URI);
			if (!verifyTempFilePath(context, request, finalTempFile)) {
			Log.w(LOG_TAG, "Download result specified an invalid temp file " + finalTempFile);
			setResultCode(1);
			return;
			}

			String relativePath = calculateDestinationFileRelativePath(request,
			(FileInfo) intent.getParcelableExtra(MbmsDownloadManager.EXTRA_INFO));

			if (!moveTempFile(finalTempFile, destinationUri, relativePath)) {
			Log.w(LOG_TAG, "Failed to move temp file to final destination");
			setResultCode(1);
			}

			context.sendBroadcast(intentForApp);
			setResultCode(0);
			}

			private void cleanupPostMove(Context context, Intent intent) {
			// TODO: account for in-use temp files
			DownloadRequest request = intent.getParcelableExtra(MbmsDownloadManager.EXTRA_REQUEST);
			if (request == null) {
			Log.w(LOG_TAG, "Intent does not include a DownloadRequest. Ignoring.");
			return;
			}

			List<Uri> tempFiles = intent.getParcelableExtra(MbmsDownloadManager.EXTRA_TEMP_LIST);
			if (tempFiles == null) {
			return;
			}

			for (Uri tempFileUri : tempFiles) {
			if (verifyTempFilePath(context, request, tempFileUri)) {
			File tempFile = new File(tempFileUri.getSchemeSpecificPart());
			tempFile.delete();
			}
			}
			}

			private void generateTempFiles(Context context, Intent intent) {
			// TODO: update pursuant to final decision on temp file locations
			DownloadRequest request = intent.getParcelableExtra(MbmsDownloadManager.EXTRA_REQUEST);
			if (request == null) {
			Log.w(LOG_TAG, "Temp file request did not include the associated request. Ignoring.");
			setResultCode(1 /* TODO: define error constants */);
			return;
			}
			int fdCount = intent.getIntExtra(MbmsDownloadManager.EXTRA_FD_COUNT, 0);
			List<Uri> pausedList = intent.getParcelableExtra(MbmsDownloadManager.EXTRA_PAUSED_LIST);

			if (fdCount == 0 && (pausedList == null \|\| pausedList.size() == 0)) {
			Log.i(LOG_TAG, "No temp files actually requested. Ending.");
			setResultCode(0);
			setResultExtras(Bundle.EMPTY);
			return;
			}

			ArrayList<UriPathPair> freshTempFiles = generateFreshTempFiles(context, request, fdCount);
			ArrayList<UriPathPair> pausedFiles =
			generateUrisForPausedFiles(context, request, pausedList);

			Bundle result = new Bundle();
			result.putParcelableArrayList(MbmsDownloadManager.EXTRA_FREE_URI_LIST, freshTempFiles);
			result.putParcelableArrayList(MbmsDownloadManager.EXTRA_PAUSED_URI_LIST, pausedFiles);
			setResultExtras(result);
			}

			private ArrayList<UriPathPair> generateFreshTempFiles(Context context, DownloadRequest request,
			int freshFdCount) {
			File tempFileDir = getEmbmsTempFileDirForRequest(context, request);
			if (!tempFileDir.exists()) {
			tempFileDir.mkdirs();
			}

			// Name the files with the template "N-UUID", where N is the request ID and UUID is a
			// random uuid.
			ArrayList<UriPathPair> result = new ArrayList<>(freshFdCount);
			for (int i = 0; i < freshFdCount; i++) {
			File tempFile = generateSingleTempFile(tempFileDir);
			if (tempFile == null) {
			setResultCode(2 /* TODO: define error constants */);
			Log.w(LOG_TAG, "Failed to generate a temp file. Moving on.");
			continue;
			}
			Uri fileUri = Uri.fromParts(ContentResolver.SCHEME_FILE, tempFile.getPath(), null);
			Uri contentUri = MbmsTempFileProvider.getUriForFile(
			context, getFileProviderAuthorityCached(context), tempFile);
			context.grantUriPermission(getMiddlewarePackageCached(context), contentUri,
			Intent.FLAG_GRANT_READ_URI_PERMISSION \| Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
			result.add(new UriPathPair(fileUri, contentUri));
			}

			return result;
			}

			private static File generateSingleTempFile(File tempFileDir) {
			int numTries = 0;
			while (numTries < MAX_TEMP_FILE_RETRIES) {
			numTries++;
			String fileName = UUID.randomUUID() + TEMP_FILE_SUFFIX;
			File tempFile = new File(tempFileDir, fileName);
			try {
			if (tempFile.createNewFile()) {
			return tempFile.getCanonicalFile();
			}
			} catch (IOException e) {
			continue;
			}
			}
			return null;
			}


			private ArrayList<UriPathPair> generateUrisForPausedFiles(Context context,
			DownloadRequest request, List<Uri> pausedFiles) {
			if (pausedFiles == null) {
			return new ArrayList<>(0);
			}
			ArrayList<UriPathPair> result = new ArrayList<>(pausedFiles.size());

			for (Uri fileUri : pausedFiles) {
			if (!verifyTempFilePath(context, request, fileUri)) {
			Log.w(LOG_TAG, "Supplied file " + fileUri + " is not a valid temp file to resume");
			setResultCode(2 /* TODO: define error codes */);
			continue;
			}
			File tempFile = new File(fileUri.getSchemeSpecificPart());
			if (!tempFile.exists()) {
			Log.w(LOG_TAG, "Supplied file " + fileUri + " does not exist.");
			setResultCode(2 /* TODO: define error codes */);
			continue;
			}
			Uri contentUri = MbmsTempFileProvider.getUriForFile(
			context, getFileProviderAuthorityCached(context), tempFile);
			context.grantUriPermission(getMiddlewarePackageCached(context), contentUri,
			Intent.FLAG_GRANT_READ_URI_PERMISSION \| Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

			result.add(new UriPathPair(fileUri, contentUri));
			}
			return result;
			}

			private static String calculateDestinationFileRelativePath(DownloadRequest request,
			FileInfo info) {
			// TODO: determine whether this is actually the path determination scheme we want to use
			List<String> filePathComponents = info.uri.getPathSegments();
			List<String> requestPathComponents = request.getSourceUri().getPathSegments();
			Iterator<String> filePathIter = filePathComponents.iterator();
			Iterator<String> requestPathIter = requestPathComponents.iterator();

			LinkedList<String> relativePathComponents = new LinkedList<>();
			while (filePathIter.hasNext()) {
			String currFilePathComponent = filePathIter.next();
			if (requestPathIter.hasNext()) {
			String requestFilePathComponent = requestPathIter.next();
			if (requestFilePathComponent.equals(currFilePathComponent)) {
			continue;
			}
			}
			relativePathComponents.add(currFilePathComponent);
			}
			return String.join("/", relativePathComponents);
			}

			private static boolean moveTempFile(Uri fromPath, Uri toPath, String relativePath) {
			if (!ContentResolver.SCHEME_FILE.equals(fromPath.getScheme())) {
			Log.w(LOG_TAG, "Moving source uri " + fromPath+ " does not have a file scheme");
			return false;
			}
			if (!ContentResolver.SCHEME_FILE.equals(toPath.getScheme())) {
			Log.w(LOG_TAG, "Moving destination uri " + toPath + " does not have a file scheme");
			return false;
			}

			File fromFile = new File(fromPath.getSchemeSpecificPart());
			File toFile = new File(toPath.getSchemeSpecificPart(), relativePath);
			toFile.getParentFile().mkdirs();

			// TODO: This may not work if the two files are on different filesystems. Should we
			// enforce that the temp file storage and the permanent storage are both in the same fs?
			return fromFile.renameTo(toFile);
			}

			private static boolean verifyTempFilePath(Context context, DownloadRequest request,
			Uri filePath) {
			// TODO: modify pursuant to final decision on temp file path scheme
			if (!ContentResolver.SCHEME_FILE.equals(filePath.getScheme())) {
			Log.w(LOG_TAG, "Uri " + filePath + " does not have a file scheme");
			return false;
			}

			String path = filePath.getSchemeSpecificPart();
			File tempFile = new File(path);
			if (!tempFile.exists()) {
			Log.w(LOG_TAG, "File at " + path + " does not exist.");
			return false;
			}

			if (!MbmsUtils.isContainedIn(getEmbmsTempFileDirForRequest(context, request), tempFile)) {
			return false;
			}

			return true;
			}

			/**
			* Returns a File linked to the directory used to store temp files for this request
			*/
			private static File getEmbmsTempFileDirForRequest(Context context, DownloadRequest request) {
			File embmsTempFileDir = MbmsTempFileProvider.getEmbmsTempFileDir(
			context, getFileProviderAuthority(context));

			// TODO: better naming scheme for temp file dirs
			String tempFileDirName = String.valueOf(request.getFileServiceInfo().getServiceId());
			return new File(embmsTempFileDir, tempFileDirName);
			}

			private String getFileProviderAuthorityCached(Context context) {
			if (mFileProviderAuthorityCache != null) {
			return mFileProviderAuthorityCache;
			}

			mFileProviderAuthorityCache = getFileProviderAuthority(context);
			return mFileProviderAuthorityCache;
			}

			private static String getFileProviderAuthority(Context context) {
			ApplicationInfo appInfo;
			try {
			appInfo = context.getPackageManager()
			.getApplicationInfo(context.getPackageName(), PackageManager.GET_META_DATA);
			} catch (PackageManager.NameNotFoundException e) {
			throw new RuntimeException("Package manager couldn't find " + context.getPackageName());
			}
			String authority = appInfo.metaData.getString(MBMS_FILE_PROVIDER_META_DATA_KEY);
			if (authority == null) {
			throw new RuntimeException("Must declare the file provider authority as meta data");
			}
			return authority;
			}

			private String getMiddlewarePackageCached(Context context) {
			if (mMiddlewarePackageNameCache == null) {
			mMiddlewarePackageNameCache = MbmsUtils.getMiddlewareServiceInfo(context,
			MbmsDownloadManager.MBMS_DOWNLOAD_SERVICE_ACTION).packageName;
			}
			return mMiddlewarePackageNameCache;
			}
			}

telephony/java/android/telephony/mbms/MbmsTempFileProvider.java

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telephony/java/android/telephony/mbms/MbmsUtils.java

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