| /* |
| * Copyright (C) 2017 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.settings.support.actionbar; |
| |
| import static com.android.settings.support.actionbar.HelpResourceProvider.HELP_URI_RESOURCE_KEY; |
| |
| import android.annotation.NonNull; |
| import android.app.Activity; |
| import android.os.Bundle; |
| import android.view.Menu; |
| import android.view.MenuInflater; |
| |
| import androidx.fragment.app.Fragment; |
| |
| import com.android.settingslib.HelpUtils; |
| import com.android.settingslib.core.lifecycle.LifecycleObserver; |
| import com.android.settingslib.core.lifecycle.ObservableFragment; |
| import com.android.settingslib.core.lifecycle.ObservablePreferenceFragment; |
| import com.android.settingslib.core.lifecycle.events.OnCreateOptionsMenu; |
| |
| /** |
| * A controller that adds help menu to any Settings page. |
| */ |
| public class HelpMenuController implements LifecycleObserver, OnCreateOptionsMenu { |
| |
| private final Fragment mHost; |
| |
| public static void init(@NonNull ObservablePreferenceFragment host) { |
| host.getSettingsLifecycle().addObserver(new HelpMenuController(host)); |
| } |
| |
| public static void init(@NonNull ObservableFragment host) { |
| host.getSettingsLifecycle().addObserver(new HelpMenuController(host)); |
| } |
| |
| private HelpMenuController(@NonNull Fragment host) { |
| mHost = host; |
| } |
| |
| @Override |
| public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { |
| final Bundle arguments = mHost.getArguments(); |
| int helpResourceId = 0; |
| if (arguments != null && arguments.containsKey(HELP_URI_RESOURCE_KEY)) { |
| helpResourceId = arguments.getInt(HELP_URI_RESOURCE_KEY); |
| } else if (mHost instanceof HelpResourceProvider) { |
| helpResourceId = ((HelpResourceProvider) mHost).getHelpResource(); |
| } |
| |
| String helpUri = null; |
| if (helpResourceId != 0) { |
| helpUri = mHost.getContext().getString(helpResourceId); |
| } |
| final Activity activity = mHost.getActivity(); |
| if (helpUri != null && activity != null) { |
| HelpUtils.prepareHelpMenuItem(activity, menu, helpUri, mHost.getClass().getName()); |
| } |
| } |
| } |