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 
17 package com.android.deskclock.widget.toast;
18 
19 import com.google.android.material.snackbar.Snackbar;
20 
21 import java.lang.ref.WeakReference;
22 
23 /**
24  * Manages visibility of Snackbar and allow preemptive dismiss of current displayed Snackbar.
25  */
26 public final class SnackbarManager {
27 
28     private static WeakReference<Snackbar> sSnackbar = null;
29 
SnackbarManager()30     private SnackbarManager() {}
31 
show(Snackbar snackbar)32     public static void show(Snackbar snackbar) {
33         sSnackbar = new WeakReference<>(snackbar);
34         snackbar.show();
35     }
36 
dismiss()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 }