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/*
* Copyright (C) 2021 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.net;
import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.res.Resources;
import android.util.Log;
import com.android.internal.annotations.VisibleForTesting;
import java.util.List;
/**
* Utility to obtain the {@link com.android.server.ConnectivityService} {@link Resources}, in the
* ServiceConnectivityResources APK.
* @hide
*/
public class ConnectivityResources {
private static final String RESOURCES_APK_INTENT =
"com.android.server.connectivity.intent.action.SERVICE_CONNECTIVITY_RESOURCES_APK";
private static final String RES_PKG_DIR = "/apex/com.android.tethering/";
@NonNull
private final Context mContext;
@Nullable
private Context mResourcesContext = null;
@Nullable
private static Context sTestResourcesContext = null;
public ConnectivityResources(Context context) {
mContext = context;
}
/**
* Convenience method to mock all resources for the duration of a test.
*
* Call with a null context to reset after the test.
*/
@VisibleForTesting
public static void setResourcesContextForTest(@Nullable Context testContext) {
sTestResourcesContext = testContext;
}
/**
* Get the {@link Context} of the resources package.
*/
public synchronized Context getResourcesContext() {
if (sTestResourcesContext != null) {
return sTestResourcesContext;
}
if (mResourcesContext != null) {
return mResourcesContext;
}
final List<ResolveInfo> pkgs = mContext.getPackageManager()
.queryIntentActivities(new Intent(RESOURCES_APK_INTENT), MATCH_SYSTEM_ONLY);
pkgs.removeIf(pkg -> !pkg.activityInfo.applicationInfo.sourceDir.startsWith(RES_PKG_DIR));
if (pkgs.size() > 1) {
Log.wtf(ConnectivityResources.class.getSimpleName(),
"More than one package found: " + pkgs);
}
if (pkgs.isEmpty()) {
throw new IllegalStateException("No connectivity resource package found");
}
final Context pkgContext;
try {
pkgContext = mContext.createPackageContext(
pkgs.get(0).activityInfo.applicationInfo.packageName, 0 /* flags */);
} catch (PackageManager.NameNotFoundException e) {
throw new IllegalStateException("Resolved package not found", e);
}
mResourcesContext = pkgContext;
return pkgContext;
}
/**
* Get the {@link Resources} of the ServiceConnectivityResources APK.
*/
public Resources get() {
return getResourcesContext().getResources();
}
}
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