1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.deskclock.widget.toast;
18
19import android.support.design.widget.Snackbar;
20
21import java.lang.ref.WeakReference;
22
23/**
24 * Manages visibility of Snackbar and allow preemptive dismiss of current displayed Snackbar.
25 */
26public final class SnackbarManager {
27
28    private static WeakReference<Snackbar> sSnackbar = null;
29
30    private SnackbarManager() {}
31
32    public static void show(Snackbar snackbar) {
33        sSnackbar = new WeakReference<>(snackbar);
34        snackbar.show();
35    }
36
37    public static void dismiss() {
38        final Snackbar snackbar = sSnackbar == null ? null : sSnackbar.get();
39        if (snackbar != null) {
40            snackbar.dismiss();
41            sSnackbar = null;
42        }
43    }
44}