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