1 /* 2 * Copyright (C) 2018 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 package com.android.quickstep; 17 18 import android.content.Context; 19 20 import com.android.launcher3.R; 21 import com.android.launcher3.Utilities; 22 import com.android.launcher3.util.Preconditions; 23 24 /** 25 * Callbacks related to overview/quicksteps. 26 */ 27 public class OverviewCallbacks { 28 29 private static OverviewCallbacks sInstance; 30 31 public static OverviewCallbacks get(Context context) { 32 Preconditions.assertUIThread(); 33 if (sInstance == null) { 34 sInstance = Utilities.getOverrideObject(OverviewCallbacks.class, 35 context.getApplicationContext(), R.string.overview_callbacks_class); 36 } 37 return sInstance; 38 } 39 40 public void onInitOverviewTransition() { } 41 42 public void onResetOverview() { } 43 44 public void closeAllWindows() { } 45 } 46
