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.systemui.keyguard; 18 19 import android.os.Trace; 20 21 import com.android.systemui.Dumpable; 22 23 import java.io.FileDescriptor; 24 import java.io.PrintWriter; 25 26 import javax.inject.Inject; 27 import javax.inject.Singleton; 28 29 /** 30 * Tracks the screen lifecycle. 31 */ 32 @Singleton 33 public class ScreenLifecycle extends Lifecycle<ScreenLifecycle.Observer> implements Dumpable { 34 35 public static final int SCREEN_OFF = 0; 36 public static final int SCREEN_TURNING_ON = 1; 37 public static final int SCREEN_ON = 2; 38 public static final int SCREEN_TURNING_OFF = 3; 39 40 private int mScreenState = SCREEN_OFF; 41 42 @Inject 43 public ScreenLifecycle() { 44 } 45 46 public int getScreenState() { 47 return mScreenState; 48 } 49 50 public void dispatchScreenTurningOn() { 51 setScreenState(SCREEN_TURNING_ON); 52 dispatch(Observer::onScreenTurningOn); 53 } 54 55 public void dispatchScreenTurnedOn() { 56 setScreenState(SCREEN_ON); 57 dispatch(Observer::onScreenTurnedOn); 58 } 59 60 public void dispatchScreenTurningOff() { 61 setScreenState(SCREEN_TURNING_OFF); 62 dispatch(Observer::onScreenTurningOff); 63 } 64 65 public void dispatchScreenTurnedOff() { 66 setScreenState(SCREEN_OFF); 67 dispatch(Observer::onScreenTurnedOff); 68 } 69 70 @Override 71 public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 72 pw.println("ScreenLifecycle:"); 73 pw.println(" mScreenState=" + mScreenState); 74 } 75 76 private void setScreenState(int screenState) { 77 mScreenState = screenState; 78 Trace.traceCounter(Trace.TRACE_TAG_APP, "screenState", screenState); 79 } 80 81 public interface Observer { 82 default void onScreenTurningOn() {} 83 default void onScreenTurnedOn() {} 84 default void onScreenTurningOff() {} 85 default void onScreenTurnedOff() {} 86 } 87 88 } 89
