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/*
* Copyright (C) 2019 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 com.android.role.controller.behavior;
import android.app.ActivityManager;
import android.app.role.RoleManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.pm.ServiceInfo;
import android.content.res.Resources;
import android.content.res.XmlResourceParser;
import android.os.Process;
import android.os.UserHandle;
import android.service.voice.VoiceInteractionService;
import android.util.ArraySet;
import android.util.AttributeSet;
import android.util.Log;
import android.util.Xml;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import com.android.role.controller.model.Role;
import com.android.role.controller.model.RoleBehavior;
import com.android.role.controller.util.UserUtils;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
/**
* Class for behavior of the assistant role.
*/
public class AssistantRoleBehavior implements RoleBehavior {
private static final String LOG_TAG = AssistantRoleBehavior.class.getSimpleName();
private static final Intent ASSIST_SERVICE_PROBE =
new Intent(VoiceInteractionService.SERVICE_INTERFACE);
private static final Intent ASSIST_ACTIVITY_PROBE = new Intent(Intent.ACTION_ASSIST);
@Override
public void onRoleAdded(@NonNull Role role, @NonNull Context context) {
PackageManager packageManager = context.getPackageManager();
if (packageManager.isDeviceUpgrading()) {
RoleManager roleManager = context.getSystemService(RoleManager.class);
List<String> packageNames = roleManager.getRoleHolders(role.getName());
if (packageNames.isEmpty()) {
// If the device was upgraded, and there isn't any legacy role holders, it means
// user selected "None" in Settings and we need to keep that.
role.onNoneHolderSelectedAsUser(Process.myUserHandle(), context);
}
}
}
@Override
public boolean isAvailableAsUser(@NonNull Role role, @NonNull UserHandle user,
@NonNull Context context) {
return !UserUtils.isProfile(user, context);
}
@Nullable
@Override
public List<String> getQualifyingPackagesAsUser(@NonNull Role role, @NonNull UserHandle user,
@NonNull Context context) {
Context userContext = UserUtils.getUserContext(context, user);
ActivityManager userActivityManager = userContext.getSystemService(ActivityManager.class);
PackageManager userPackageManager = userContext.getPackageManager();
Set<String> availableAssistants = new ArraySet<>();
if (!userActivityManager.isLowRamDevice()) {
List<ResolveInfo> services = userPackageManager.queryIntentServices(
ASSIST_SERVICE_PROBE, PackageManager.GET_META_DATA
| PackageManager.MATCH_DIRECT_BOOT_AWARE
| PackageManager.MATCH_DIRECT_BOOT_UNAWARE);
int numServices = services.size();
for (int i = 0; i < numServices; i++) {
ResolveInfo service = services.get(i);
if (isAssistantVoiceInteractionService(userPackageManager, service.serviceInfo)) {
availableAssistants.add(service.serviceInfo.packageName);
}
}
}
List<ResolveInfo> activities = userPackageManager.queryIntentActivities(
ASSIST_ACTIVITY_PROBE, PackageManager.MATCH_DEFAULT_ONLY
| PackageManager.MATCH_DIRECT_BOOT_AWARE
| PackageManager.MATCH_DIRECT_BOOT_UNAWARE);
int numActivities = activities.size();
for (int i = 0; i < numActivities; i++) {
availableAssistants.add(activities.get(i).activityInfo.packageName);
}
return new ArrayList<>(availableAssistants);
}
@Nullable
@Override
public Boolean isPackageQualified(@NonNull Role role, @NonNull String packageName,
@NonNull Context context) {
ActivityManager activityManager = context.getSystemService(ActivityManager.class);
PackageManager packageManager = context.getPackageManager();
boolean hasAssistantService = false;
if (!activityManager.isLowRamDevice()) {
Intent pkgServiceProbe = new Intent(ASSIST_SERVICE_PROBE).setPackage(packageName);
List<ResolveInfo> services = packageManager.queryIntentServices(pkgServiceProbe,
PackageManager.GET_META_DATA | PackageManager.MATCH_DIRECT_BOOT_AWARE
| PackageManager.MATCH_DIRECT_BOOT_UNAWARE);
hasAssistantService = !services.isEmpty();
int numServices = services.size();
for (int i = 0; i < numServices; i++) {
ResolveInfo service = services.get(i);
if (isAssistantVoiceInteractionService(packageManager, service.serviceInfo)) {
return true;
}
}
}
Intent pkgActivityProbe = new Intent(ASSIST_ACTIVITY_PROBE).setPackage(packageName);
boolean hasAssistantActivity = !packageManager.queryIntentActivities(pkgActivityProbe,
PackageManager.MATCH_DEFAULT_ONLY | PackageManager.MATCH_DIRECT_BOOT_AWARE
| PackageManager.MATCH_DIRECT_BOOT_UNAWARE).isEmpty();
if (!hasAssistantActivity) {
Log.w(LOG_TAG, "Package " + packageName + " not qualified for " + role.getName()
+ " due to " + (hasAssistantService ? "unqualified" : "missing")
+ " service and missing activity");
}
return hasAssistantActivity;
}
@Override
public void grant(@NonNull Role role, @NonNull String packageName, @NonNull Context context) {
}
@Override
public void revoke(@NonNull Role role, @NonNull String packageName, @NonNull Context context) {
}
private boolean isAssistantVoiceInteractionService(@NonNull PackageManager pm,
@NonNull ServiceInfo si) {
if (!android.Manifest.permission.BIND_VOICE_INTERACTION.equals(si.permission)) {
return false;
}
try (XmlResourceParser parser = si.loadXmlMetaData(pm,
VoiceInteractionService.SERVICE_META_DATA)) {
if (parser == null) {
return false;
}
int type;
do {
type = parser.next();
} while (type != XmlResourceParser.END_DOCUMENT && type != XmlResourceParser.START_TAG);
String sessionService = null;
String recognitionService = null;
boolean supportsAssist = false;
AttributeSet attrs = Xml.asAttributeSet(parser);
int numAttrs = attrs.getAttributeCount();
for (int i = 0; i < numAttrs; i++) {
switch (attrs.getAttributeNameResource(i)) {
case android.R.attr.sessionService:
sessionService = attrs.getAttributeValue(i);
break;
case android.R.attr.recognitionService:
recognitionService = attrs.getAttributeValue(i);
break;
case android.R.attr.supportsAssist:
supportsAssist = attrs.getAttributeBooleanValue(i, false);
break;
}
}
if (sessionService == null || recognitionService == null || !supportsAssist) {
return false;
}
} catch (XmlPullParserException | IOException | Resources.NotFoundException ignored) {
return false;
}
return true;
}
}
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