1 /*
2  * Copyright (C) 2020 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.compatibility.common.util;
18 
19 public class ScreenUtils {
20 
setScreenOn(boolean on)21     public static void setScreenOn(boolean on) throws Exception {
22         BatteryUtils.turnOnScreen(on);
23 
24         // there is no way to listen for changes except broadcasts, and no way to guarantee
25         // broadcast reception except waiting and crossing fingers. 2s should be enough in the idle
26         // case, but may not be enough if the phone isn't idle
27         Thread.sleep(2000);
28     }
29 
30     /**
31      * Try-with-resources class that resets the screen state on close to whatever the screen state
32      * was on acquire.
33      */
34     public static class ScreenResetter implements AutoCloseable {
35 
36         private final boolean mScreenInteractive;
37 
ScreenResetter()38         public ScreenResetter() {
39             mScreenInteractive = BatteryUtils.getPowerManager().isInteractive();
40         }
41 
42         @Override
close()43         public void close() throws Exception {
44             BatteryUtils.turnOnScreen(mScreenInteractive);
45         }
46     }
47 }
48