1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.net; 18 19 import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY; 20 21 import android.annotation.NonNull; 22 import android.annotation.Nullable; 23 import android.content.Context; 24 import android.content.Intent; 25 import android.content.pm.PackageManager; 26 import android.content.pm.ResolveInfo; 27 import android.content.res.Resources; 28 import android.util.Log; 29 30 import com.android.internal.annotations.VisibleForTesting; 31 32 import java.util.List; 33 34 /** 35 * Utility to obtain the {@link com.android.server.ConnectivityService} {@link Resources}, in the 36 * ServiceConnectivityResources APK. 37 * @hide 38 */ 39 public class ConnectivityResources { 40 private static final String RESOURCES_APK_INTENT = 41 "com.android.server.connectivity.intent.action.SERVICE_CONNECTIVITY_RESOURCES_APK"; 42 private static final String RES_PKG_DIR = "/apex/com.android.tethering/"; 43 44 @NonNull 45 private final Context mContext; 46 47 @Nullable 48 private Context mResourcesContext = null; 49 50 @Nullable 51 private static Context sTestResourcesContext = null; 52 ConnectivityResources(Context context)53 public ConnectivityResources(Context context) { 54 mContext = context; 55 } 56 57 /** 58 * Convenience method to mock all resources for the duration of a test. 59 * 60 * Call with a null context to reset after the test. 61 */ 62 @VisibleForTesting setResourcesContextForTest(@ullable Context testContext)63 public static void setResourcesContextForTest(@Nullable Context testContext) { 64 sTestResourcesContext = testContext; 65 } 66 67 /** 68 * Get the {@link Context} of the resources package. 69 */ getResourcesContext()70 public synchronized Context getResourcesContext() { 71 if (sTestResourcesContext != null) { 72 return sTestResourcesContext; 73 } 74 75 if (mResourcesContext != null) { 76 return mResourcesContext; 77 } 78 79 final List<ResolveInfo> pkgs = mContext.getPackageManager() 80 .queryIntentActivities(new Intent(RESOURCES_APK_INTENT), MATCH_SYSTEM_ONLY); 81 pkgs.removeIf(pkg -> !pkg.activityInfo.applicationInfo.sourceDir.startsWith(RES_PKG_DIR)); 82 if (pkgs.size() > 1) { 83 Log.wtf(ConnectivityResources.class.getSimpleName(), 84 "More than one package found: " + pkgs); 85 } 86 if (pkgs.isEmpty()) { 87 throw new IllegalStateException("No connectivity resource package found"); 88 } 89 90 final Context pkgContext; 91 try { 92 pkgContext = mContext.createPackageContext( 93 pkgs.get(0).activityInfo.applicationInfo.packageName, 0 /* flags */); 94 } catch (PackageManager.NameNotFoundException e) { 95 throw new IllegalStateException("Resolved package not found", e); 96 } 97 98 mResourcesContext = pkgContext; 99 return pkgContext; 100 } 101 102 /** 103 * Get the {@link Resources} of the ServiceConnectivityResources APK. 104 */ get()105 public Resources get() { 106 return getResourcesContext().getResources(); 107 } 108 } 109