| /* |
| * 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 com.android.settingslib.enterprise; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import android.app.admin.DevicePolicyManager; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.PackageManager; |
| import android.net.Uri; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin; |
| |
| /** |
| * Helper class meant to set up the "Learn more" button in the action disabled dialog. |
| */ |
| public abstract class ActionDisabledLearnMoreButtonLauncher { |
| |
| public static ResolveActivityChecker DEFAULT_RESOLVE_ACTIVITY_CHECKER = |
| (packageManager, url, userHandle) -> packageManager.resolveActivityAsUser( |
| createLearnMoreIntent(url), |
| PackageManager.MATCH_DEFAULT_ONLY, |
| userHandle.getIdentifier()) != null; |
| |
| interface ResolveActivityChecker { |
| boolean canResolveActivityAsUser( |
| PackageManager packageManager, String url, UserHandle userHandle); |
| } |
| |
| /** |
| * Sets up a "learn more" button which shows a screen with device policy settings |
| */ |
| public final void setupLearnMoreButtonToShowAdminPolicies(Context context, |
| int enforcementAdminUserId, EnforcedAdmin enforcedAdmin) { |
| requireNonNull(context, "context cannot be null"); |
| requireNonNull(enforcedAdmin, "enforcedAdmin cannot be null"); |
| |
| // The "Learn more" button appears only if the restriction is enforced by an admin in the |
| // same profile group or by the device owner. Otherwise the admin package and its policies |
| // are not accessible to the current user. |
| if (isSameProfileGroup(context, enforcementAdminUserId) |
| || isEnforcedByDeviceOwnerOnSystemUserMode(context, enforcementAdminUserId)) { |
| setLearnMoreButton(() -> showAdminPolicies(context, enforcedAdmin)); |
| } |
| } |
| |
| /** |
| * Sets up a "learn more" button which launches a help page |
| */ |
| public final void setupLearnMoreButtonToLaunchHelpPage( |
| Context context, String url, UserHandle userHandle) { |
| requireNonNull(context, "context cannot be null"); |
| requireNonNull(url, "url cannot be null"); |
| |
| setLearnMoreButton(() -> showHelpPage(context, url, userHandle)); |
| } |
| |
| /** |
| * Sets the "learning more" button. |
| * |
| * @param action action to be run when the button is tapped. |
| */ |
| public abstract void setLearnMoreButton(Runnable action); |
| |
| /** |
| * Launches the settings page with info about the given admin. |
| */ |
| protected abstract void launchShowAdminPolicies(Context context, UserHandle user, |
| ComponentName admin); |
| |
| /** |
| * Launches the settings page that shows all admins. |
| */ |
| protected abstract void launchShowAdminSettings(Context context); |
| |
| /** |
| * Callback to finish the activity associated with the launcher. |
| */ |
| protected void finishSelf() { |
| } |
| |
| @VisibleForTesting |
| protected boolean isSameProfileGroup(Context context, int enforcementAdminUserId) { |
| UserManager um = context.getSystemService(UserManager.class); |
| |
| return um.isSameProfileGroup(enforcementAdminUserId, um.getUserHandle()); |
| } |
| |
| private boolean isEnforcedByDeviceOwnerOnSystemUserMode( |
| Context context, int enforcementAdminUserId) { |
| if (enforcementAdminUserId != UserHandle.USER_SYSTEM) { |
| return false; |
| } |
| DevicePolicyManager dpm = context.getSystemService(DevicePolicyManager.class); |
| return enforcementAdminUserId == dpm.getDeviceOwnerUserId(); |
| } |
| |
| /** |
| * Shows the help page using the given {@code url}. |
| */ |
| @VisibleForTesting |
| public void showHelpPage(Context context, String url, UserHandle userHandle) { |
| context.startActivityAsUser(createLearnMoreIntent(url), userHandle); |
| finishSelf(); |
| } |
| |
| protected final boolean canLaunchHelpPage( |
| PackageManager packageManager, |
| String url, |
| UserHandle userHandle, |
| ResolveActivityChecker resolveActivityChecker) { |
| return resolveActivityChecker.canResolveActivityAsUser(packageManager, url, userHandle); |
| } |
| |
| private void showAdminPolicies(Context context, EnforcedAdmin enforcedAdmin) { |
| if (enforcedAdmin.component != null) { |
| launchShowAdminPolicies(context, enforcedAdmin.user, enforcedAdmin.component); |
| } else { |
| launchShowAdminSettings(context); |
| } |
| finishSelf(); |
| } |
| |
| private static Intent createLearnMoreIntent(String url) { |
| return new Intent(Intent.ACTION_VIEW, Uri.parse(url)).setFlags( |
| Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); |
| } |
| } |