273 lines
12 KiB
Java
273 lines
12 KiB
Java
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.webkit;
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import java.util.ArrayList;
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import java.util.List;
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import android.annotation.SdkConstant;
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import android.annotation.SdkConstant.SdkConstantType;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.ApplicationInfo;
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import android.content.pm.PackageInfo;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.content.pm.ServiceInfo;
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import android.content.pm.Signature;
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import android.content.pm.PackageManager.NameNotFoundException;
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import android.os.SystemProperties;
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import android.util.Log;
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/**
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* Class for managing the relationship between the {@link WebView} and installed
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* plugins in the system. You can find this class through
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* {@link PluginManager#getInstance}.
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*
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* @hide pending API solidification
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*/
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public class PluginManager {
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/**
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* Service Action: A plugin wishes to be loaded in the WebView must provide
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* {@link android.content.IntentFilter IntentFilter} that accepts this
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* action in their AndroidManifest.xml.
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* <p>
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* TODO: we may change this to a new PLUGIN_ACTION if this is going to be
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* public.
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*/
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@SdkConstant(SdkConstantType.SERVICE_ACTION)
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public static final String PLUGIN_ACTION = "android.webkit.PLUGIN";
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/**
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* A plugin wishes to be loaded in the WebView must provide this permission
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* in their AndroidManifest.xml.
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*/
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public static final String PLUGIN_PERMISSION = "android.webkit.permission.PLUGIN";
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private static final String LOGTAG = "PluginManager";
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private static final String PLUGIN_SYSTEM_LIB = "/system/lib/plugins/";
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private static final String PLUGIN_TYPE = "type";
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private static final String TYPE_NATIVE = "native";
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private static PluginManager mInstance = null;
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private final Context mContext;
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private ArrayList<PackageInfo> mPackageInfoCache;
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// Only plugin matches one of the signatures in the list can be loaded
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// inside the WebView process
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private static final String SIGNATURE_1 = "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";
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private static final Signature[] SIGNATURES = new Signature[] {
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new Signature(SIGNATURE_1)
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};
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private PluginManager(Context context) {
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mContext = context;
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mPackageInfoCache = new ArrayList<PackageInfo>();
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}
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public static synchronized PluginManager getInstance(Context context) {
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if (mInstance == null) {
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if (context == null) {
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throw new IllegalStateException(
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"First call to PluginManager need a valid context.");
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}
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mInstance = new PluginManager(context.getApplicationContext());
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}
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return mInstance;
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}
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/**
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* Signal the WebCore thread to refresh its list of plugins. Use this if the
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* directory contents of one of the plugin directories has been modified and
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* needs its changes reflecting. May cause plugin load and/or unload.
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*
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* @param reloadOpenPages Set to true to reload all open pages.
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*/
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public void refreshPlugins(boolean reloadOpenPages) {
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BrowserFrame.sJavaBridge.obtainMessage(
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JWebCoreJavaBridge.REFRESH_PLUGINS, reloadOpenPages)
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.sendToTarget();
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}
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String[] getPluginDirectories() {
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ArrayList<String> directories = new ArrayList<String>();
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PackageManager pm = mContext.getPackageManager();
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List<ResolveInfo> plugins = pm.queryIntentServices(new Intent(PLUGIN_ACTION),
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PackageManager.GET_SERVICES | PackageManager.GET_META_DATA);
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synchronized(mPackageInfoCache) {
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// clear the list of existing packageInfo objects
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mPackageInfoCache.clear();
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for (ResolveInfo info : plugins) {
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// retrieve the plugin's service information
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ServiceInfo serviceInfo = info.serviceInfo;
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if (serviceInfo == null) {
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Log.w(LOGTAG, "Ignore bad plugin");
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continue;
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}
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// retrieve information from the plugin's manifest
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PackageInfo pkgInfo;
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try {
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pkgInfo = pm.getPackageInfo(serviceInfo.packageName,
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PackageManager.GET_PERMISSIONS
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| PackageManager.GET_SIGNATURES);
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} catch (NameNotFoundException e) {
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Log.w(LOGTAG, "Can't find plugin: " + serviceInfo.packageName);
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continue;
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}
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if (pkgInfo == null) {
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continue;
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}
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/*
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* find the location of the plugin's shared library. The default
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* is to assume the app is either a user installed app or an
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* updated system app. In both of these cases the library is
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* stored in the app's data directory.
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*/
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String directory = pkgInfo.applicationInfo.dataDir + "/lib";
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final int appFlags = pkgInfo.applicationInfo.flags;
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final int updatedSystemFlags = ApplicationInfo.FLAG_SYSTEM |
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ApplicationInfo.FLAG_UPDATED_SYSTEM_APP;
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// preloaded system app with no user updates
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if ((appFlags & updatedSystemFlags) == ApplicationInfo.FLAG_SYSTEM) {
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directory = PLUGIN_SYSTEM_LIB + pkgInfo.packageName;
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}
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// check if the plugin has the required permissions
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String permissions[] = pkgInfo.requestedPermissions;
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if (permissions == null) {
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continue;
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}
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boolean permissionOk = false;
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for (String permit : permissions) {
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if (PLUGIN_PERMISSION.equals(permit)) {
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permissionOk = true;
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break;
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}
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}
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if (!permissionOk) {
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continue;
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}
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// check to ensure the plugin is properly signed
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Signature signatures[] = pkgInfo.signatures;
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if (signatures == null) {
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continue;
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}
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if (SystemProperties.getBoolean("ro.secure", false)) {
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boolean signatureMatch = false;
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for (Signature signature : signatures) {
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for (int i = 0; i < SIGNATURES.length; i++) {
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if (SIGNATURES[i].equals(signature)) {
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signatureMatch = true;
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break;
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}
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}
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}
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if (!signatureMatch) {
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continue;
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}
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}
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// determine the type of plugin from the manifest
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if (serviceInfo.metaData == null) {
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Log.e(LOGTAG, "The plugin '" + serviceInfo.name + "' has no type defined");
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continue;
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}
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String pluginType = serviceInfo.metaData.getString(PLUGIN_TYPE);
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if (!TYPE_NATIVE.equals(pluginType)) {
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Log.e(LOGTAG, "Unrecognized plugin type: " + pluginType);
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continue;
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}
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try {
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Class<?> cls = getPluginClass(serviceInfo.packageName, serviceInfo.name);
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//TODO implement any requirements of the plugin class here!
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boolean classFound = true;
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if (!classFound) {
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Log.e(LOGTAG, "The plugin's class' " + serviceInfo.name + "' does not extend the appropriate class.");
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continue;
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}
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} catch (NameNotFoundException e) {
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Log.e(LOGTAG, "Can't find plugin: " + serviceInfo.packageName);
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continue;
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} catch (ClassNotFoundException e) {
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Log.e(LOGTAG, "Can't find plugin's class: " + serviceInfo.name);
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continue;
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}
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// if all checks have passed then make the plugin available
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mPackageInfoCache.add(pkgInfo);
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directories.add(directory);
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}
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}
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return directories.toArray(new String[directories.size()]);
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}
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/* package */
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String getPluginsAPKName(String pluginLib) {
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// basic error checking on input params
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if (pluginLib == null || pluginLib.length() == 0) {
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return null;
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}
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// must be synchronized to ensure the consistency of the cache
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synchronized(mPackageInfoCache) {
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for (PackageInfo pkgInfo : mPackageInfoCache) {
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if (pluginLib.contains(pkgInfo.packageName)) {
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return pkgInfo.packageName;
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}
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}
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}
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// if no apk was found then return null
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return null;
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}
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String getPluginSharedDataDirectory() {
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return mContext.getDir("plugins", 0).getPath();
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}
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/* package */
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Class<?> getPluginClass(String packageName, String className)
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throws NameNotFoundException, ClassNotFoundException {
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Context pluginContext = mContext.createPackageContext(packageName,
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Context.CONTEXT_INCLUDE_CODE |
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Context.CONTEXT_IGNORE_SECURITY);
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ClassLoader pluginCL = pluginContext.getClassLoader();
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return pluginCL.loadClass(className);
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}
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}
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