1 /* 2 * Copyright (C) 2017 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.launcher3.util; 18 19 import android.view.View; 20 import android.view.Window; 21 22 import com.android.launcher3.Utilities; 23 24 /** 25 * Utility class to manage various window flags to control system UI. 26 */ 27 public class SystemUiController { 28 29 // Various UI states in increasing order of priority 30 public static final int UI_STATE_BASE_WINDOW = 0; 31 public static final int UI_STATE_ALL_APPS = 1; 32 public static final int UI_STATE_WIDGET_BOTTOM_SHEET = 2; 33 public static final int UI_STATE_ROOT_VIEW = 3; 34 35 public static final int FLAG_LIGHT_NAV = 1 << 0; 36 public static final int FLAG_DARK_NAV = 1 << 1; 37 public static final int FLAG_LIGHT_STATUS = 1 << 2; 38 public static final int FLAG_DARK_STATUS = 1 << 3; 39 40 private final Window mWindow; 41 private final int[] mStates = new int[4]; 42 SystemUiController(Window window)43 public SystemUiController(Window window) { 44 mWindow = window; 45 } 46 updateUiState(int uiState, boolean isLight)47 public void updateUiState(int uiState, boolean isLight) { 48 updateUiState(uiState, isLight 49 ? (FLAG_LIGHT_NAV | FLAG_LIGHT_STATUS) : (FLAG_DARK_NAV | FLAG_DARK_STATUS)); 50 } 51 updateUiState(int uiState, int flags)52 public void updateUiState(int uiState, int flags) { 53 if (mStates[uiState] == flags) { 54 return; 55 } 56 mStates[uiState] = flags; 57 58 int oldFlags = mWindow.getDecorView().getSystemUiVisibility(); 59 // Apply the state flags in priority order 60 int newFlags = oldFlags; 61 for (int stateFlag : mStates) { 62 if (Utilities.ATLEAST_OREO) { 63 if ((stateFlag & FLAG_LIGHT_NAV) != 0) { 64 newFlags |= View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR; 65 } else if ((stateFlag & FLAG_DARK_NAV) != 0) { 66 newFlags &= ~(View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR); 67 } 68 } 69 70 if ((stateFlag & FLAG_LIGHT_STATUS) != 0) { 71 newFlags |= View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR; 72 } else if ((stateFlag & FLAG_DARK_STATUS) != 0) { 73 newFlags &= ~(View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR); 74 } 75 } 76 if (newFlags != oldFlags) { 77 mWindow.getDecorView().setSystemUiVisibility(newFlags); 78 } 79 } 80 } 81