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 android.support.design.widget.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 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 }
