/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.systemui.settings;
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import android.content.Context;
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import androidx.lifecycle.LiveData;
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import androidx.lifecycle.MutableLiveData;
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/**
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* A class that has an observable for the current user.
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*/
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public class CurrentUserObservable {
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private final CurrentUserTracker mTracker;
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private final MutableLiveData<Integer> mCurrentUser = new MutableLiveData<Integer>() {
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@Override
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protected void onActive() {
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super.onActive();
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mTracker.startTracking();
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}
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@Override
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protected void onInactive() {
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super.onInactive();
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mTracker.startTracking();
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}
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};
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public CurrentUserObservable(Context context) {
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mTracker = new CurrentUserTracker(context) {
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@Override
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public void onUserSwitched(int newUserId) {
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mCurrentUser.setValue(newUserId);
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}
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};
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}
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/**
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* Returns the current user that can be observed.
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*/
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public LiveData<Integer> getCurrentUser() {
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if (mCurrentUser.getValue() == null) {
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mCurrentUser.setValue(mTracker.getCurrentUserId());
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}
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return mCurrentUser;
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}
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}
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