├── app ├── .gitignore ├── src │ └── main │ │ ├── res │ │ ├── values │ │ │ ├── strings.xml │ │ │ ├── colors.xml │ │ │ └── styles.xml │ │ ├── mipmap-hdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-mdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-xhdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxhdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-xxxhdpi │ │ │ ├── ic_launcher.png │ │ │ └── ic_launcher_round.png │ │ ├── mipmap-anydpi-v26 │ │ │ ├── ic_launcher.xml │ │ │ └── ic_launcher_round.xml │ │ ├── layout │ │ │ └── activity_main.xml │ │ ├── drawable-v24 │ │ │ └── ic_launcher_foreground.xml │ │ └── drawable │ │ │ └── ic_launcher_background.xml │ │ ├── AndroidManifest.xml │ │ └── java │ │ └── com │ │ └── android │ │ └── dayandnightdetector │ │ └── MainActivity.kt ├── proguard-rules.pro └── build.gradle ├── library ├── .gitignore ├── src │ └── main │ │ ├── res │ │ └── values │ │ │ └── strings.xml │ │ ├── AndroidManifest.xml │ │ └── java │ │ └── com │ │ └── lb │ │ └── twilight_calculator │ │ └── TwilightCalculator.kt ├── proguard-rules.pro └── build.gradle ├── settings.gradle ├── app-debug.apk ├── extras └── original source code.7z ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── .idea ├── vcs.xml ├── codeStyles │ ├── codeStyleConfig.xml │ └── Project.xml ├── encodings.xml ├── runConfigurations.xml ├── gradle.xml └── misc.xml ├── .gitignore ├── README.md ├── gradle.properties ├── gradlew.bat ├── gradlew └── LICENSE /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /library/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | include ':app', ':library' 2 | -------------------------------------------------------------------------------- /library/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /app-debug.apk: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app-debug.apk -------------------------------------------------------------------------------- /app/src/main/res/values/strings.xml: -------------------------------------------------------------------------------- 1 | 2 | DayAndNightDetector 3 | 4 | -------------------------------------------------------------------------------- /extras/original source code.7z: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/extras/original source code.7z -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /library/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-hdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-mdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/AndroidDeveloperLB/DayAndNightDetector/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.idea/codeStyles/codeStyleConfig.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 5 | -------------------------------------------------------------------------------- /.idea/encodings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /app/src/main/res/values/colors.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | #008577 4 | #00574B 5 | #D81B60 6 | 7 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea/caches 5 | /.idea/libraries 6 | /.idea/modules.xml 7 | /.idea/workspace.xml 8 | /.idea/navEditor.xml 9 | /.idea/assetWizardSettings.xml 10 | .DS_Store 11 | /build 12 | /captures 13 | .externalNativeBuild 14 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Tue Sep 17 19:56:35 IDT 2019 2 | distributionBase=GRADLE_USER_HOME 3 | distributionPath=wrapper/dists 4 | zipStoreBase=GRADLE_USER_HOME 5 | zipStorePath=wrapper/dists 6 | distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip 7 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /app/src/main/res/values/styles.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # DayAndNightDetector 2 | Detects if it's now day or night using the TwilightCalculator class by Google, which was published here: 3 | 4 | https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/services/core/java/com/android/server/twilight/TwilightService.java 5 | https://android.googlesource.com/platform/frameworks/support/+/androidx-master-dev/appcompat/src/main/java/androidx/appcompat/app/TwilightCalculator.java 6 | 7 | Sample APK: 8 | 9 | https://github.com/AndroidDeveloperLB/DayAndNightDetector/raw/master/app-debug.apk 10 | -------------------------------------------------------------------------------- /.idea/runConfigurations.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 11 | 12 | -------------------------------------------------------------------------------- /.idea/gradle.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 18 | 19 | -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 14 | 15 | 16 | 17 | 18 | 19 | 21 | -------------------------------------------------------------------------------- /app/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile 22 | -------------------------------------------------------------------------------- /library/proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # You can control the set of applied configuration files using the 3 | # proguardFiles setting in build.gradle. 4 | # 5 | # For more details, see 6 | # http://developer.android.com/guide/developing/tools/proguard.html 7 | 8 | # If your project uses WebView with JS, uncomment the following 9 | # and specify the fully qualified class name to the JavaScript interface 10 | # class: 11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 12 | # public *; 13 | #} 14 | 15 | # Uncomment this to preserve the line number information for 16 | # debugging stack traces. 17 | #-keepattributes SourceFile,LineNumberTable 18 | 19 | # If you keep the line number information, uncomment this to 20 | # hide the original source file name. 21 | #-renamesourcefileattribute SourceFile 22 | -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 6 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /library/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.library' 2 | apply plugin: 'kotlin-android' 3 | 4 | android { 5 | compileSdkVersion 29 6 | 7 | defaultConfig { 8 | minSdkVersion 14 9 | targetSdkVersion 29 10 | versionCode 1 11 | versionName "1.0" 12 | 13 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" 14 | 15 | } 16 | 17 | buildTypes { 18 | release { 19 | minifyEnabled false 20 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 21 | } 22 | } 23 | 24 | } 25 | 26 | dependencies { 27 | implementation fileTree(dir: 'libs', include: ['*.jar']) 28 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 29 | implementation 'androidx.core:core-ktx:1.1.0' 30 | implementation 'com.google.android.gms:play-services-location:17.0.0' 31 | } 32 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | apply plugin: 'kotlin-android' 4 | 5 | apply plugin: 'kotlin-android-extensions' 6 | 7 | android { 8 | compileSdkVersion 29 9 | defaultConfig { 10 | applicationId "com.android.dayandnightdetector" 11 | minSdkVersion 16 12 | targetSdkVersion 29 13 | versionCode 1 14 | versionName "1.0" 15 | } 16 | buildTypes { 17 | release { 18 | minifyEnabled false 19 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' 20 | } 21 | } 22 | compileOptions { 23 | sourceCompatibility = '1.8' 24 | targetCompatibility = '1.8' 25 | } 26 | } 27 | 28 | dependencies { 29 | implementation fileTree(dir: 'libs', include: ['*.jar']) 30 | implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" 31 | implementation 'androidx.appcompat:appcompat:1.1.0' 32 | implementation 'androidx.core:core-ktx:1.1.0' 33 | implementation 'androidx.constraintlayout:constraintlayout:1.1.3' 34 | implementation 'com.google.android.gms:play-services-location:17.0.0' 35 | implementation project(path: ':library') 36 | } 37 | -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | # IDE (e.g. Android Studio) users: 3 | # Gradle settings configured through the IDE *will override* 4 | # any settings specified in this file. 5 | # For more details on how to configure your build environment visit 6 | # http://www.gradle.org/docs/current/userguide/build_environment.html 7 | # Specifies the JVM arguments used for the daemon process. 8 | # The setting is particularly useful for tweaking memory settings. 9 | org.gradle.jvmargs=-Xmx1536m 10 | # When configured, Gradle will run in incubating parallel mode. 11 | # This option should only be used with decoupled projects. More details, visit 12 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 13 | # org.gradle.parallel=true 14 | # AndroidX package structure to make it clearer which packages are bundled with the 15 | # Android operating system, and which are packaged with your app's APK 16 | # https://developer.android.com/topic/libraries/support-library/androidx-rn 17 | android.useAndroidX=true 18 | # Automatically convert third-party libraries to use AndroidX 19 | android.enableJetifier=true 20 | # Kotlin code style for this project: "official" or "obsolete": 21 | #kotlin.code.style=official 22 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-v24/ic_launcher_foreground.xml: -------------------------------------------------------------------------------- 1 | 7 | 12 | 13 | 19 | 22 | 25 | 26 | 27 | 28 | 34 | 35 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @if "%DEBUG%" == "" @echo off 2 | @rem ########################################################################## 3 | @rem 4 | @rem Gradle startup script for Windows 5 | @rem 6 | @rem ########################################################################## 7 | 8 | @rem Set local scope for the variables with windows NT shell 9 | if "%OS%"=="Windows_NT" setlocal 10 | 11 | set DIRNAME=%~dp0 12 | if "%DIRNAME%" == "" set DIRNAME=. 13 | set APP_BASE_NAME=%~n0 14 | set APP_HOME=%DIRNAME% 15 | 16 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 17 | set DEFAULT_JVM_OPTS= 18 | 19 | @rem Find java.exe 20 | if defined JAVA_HOME goto findJavaFromJavaHome 21 | 22 | set JAVA_EXE=java.exe 23 | %JAVA_EXE% -version >NUL 2>&1 24 | if "%ERRORLEVEL%" == "0" goto init 25 | 26 | echo. 27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 28 | echo. 29 | echo Please set the JAVA_HOME variable in your environment to match the 30 | echo location of your Java installation. 31 | 32 | goto fail 33 | 34 | :findJavaFromJavaHome 35 | set JAVA_HOME=%JAVA_HOME:"=% 36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 37 | 38 | if exist "%JAVA_EXE%" goto init 39 | 40 | echo. 41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 42 | echo. 43 | echo Please set the JAVA_HOME variable in your environment to match the 44 | echo location of your Java installation. 45 | 46 | goto fail 47 | 48 | :init 49 | @rem Get command-line arguments, handling Windows variants 50 | 51 | if not "%OS%" == "Windows_NT" goto win9xME_args 52 | 53 | :win9xME_args 54 | @rem Slurp the command line arguments. 55 | set CMD_LINE_ARGS= 56 | set _SKIP=2 57 | 58 | :win9xME_args_slurp 59 | if "x%~1" == "x" goto execute 60 | 61 | set CMD_LINE_ARGS=%* 62 | 63 | :execute 64 | @rem Setup the command line 65 | 66 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 67 | 68 | @rem Execute Gradle 69 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% 70 | 71 | :end 72 | @rem End local scope for the variables with windows NT shell 73 | if "%ERRORLEVEL%"=="0" goto mainEnd 74 | 75 | :fail 76 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 77 | rem the _cmd.exe /c_ return code! 78 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 79 | exit /b 1 80 | 81 | :mainEnd 82 | if "%OS%"=="Windows_NT" endlocal 83 | 84 | :omega 85 | -------------------------------------------------------------------------------- /.idea/codeStyles/Project.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 6 | 7 | 8 | 9 |
10 | 11 | 12 | 13 | xmlns:android 14 | 15 | ^$ 16 | 17 | 18 | 19 |
20 |
21 | 22 | 23 | 24 | xmlns:.* 25 | 26 | ^$ 27 | 28 | 29 | BY_NAME 30 | 31 |
32 |
33 | 34 | 35 | 36 | .*:id 37 | 38 | http://schemas.android.com/apk/res/android 39 | 40 | 41 | 42 |
43 |
44 | 45 | 46 | 47 | .*:name 48 | 49 | http://schemas.android.com/apk/res/android 50 | 51 | 52 | 53 |
54 |
55 | 56 | 57 | 58 | name 59 | 60 | ^$ 61 | 62 | 63 | 64 |
65 |
66 | 67 | 68 | 69 | style 70 | 71 | ^$ 72 | 73 | 74 | 75 |
76 |
77 | 78 | 79 | 80 | .* 81 | 82 | ^$ 83 | 84 | 85 | BY_NAME 86 | 87 |
88 |
89 | 90 | 91 | 92 | .* 93 | 94 | http://schemas.android.com/apk/res/android 95 | 96 | 97 | ANDROID_ATTRIBUTE_ORDER 98 | 99 |
100 |
101 | 102 | 103 | 104 | .* 105 | 106 | .* 107 | 108 | 109 | BY_NAME 110 | 111 |
112 | 113 | 114 | 115 | 116 | 118 | 119 | -------------------------------------------------------------------------------- /library/src/main/java/com/lb/twilight_calculator/TwilightCalculator.kt: -------------------------------------------------------------------------------- 1 | /* 2 | * Copyright (C) 2015 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.lb.twilight_calculator 17 | 18 | import android.text.format.DateUtils 19 | import kotlin.math.* 20 | 21 | 22 | /** 23 | * Imported from frameworks/base/services/core/java/com/android/server/TwilightCalculator.java 24 | * 25 | * 26 | * Calculates the sunrise and sunsets times for a given location. 27 | */ 28 | object TwilightCalculator { 29 | private const val DEGREES_TO_RADIANS = (Math.PI / 180.0) 30 | // element for calculating solar transit. 31 | private const val J0 = 0.0009 32 | // correction for civil twilight 33 | private const val ALTITUDE_CORRECTION_CIVIL_TWILIGHT = -0.104719755 34 | // coefficients for calculating Equation of Center. 35 | private const val C1 = 0.0334196 36 | private const val C2 = 0.000349066 37 | private const val C3 = 0.000005236 38 | private const val OBLIQUITY = 0.40927971 39 | // Java time on Jan 1, 2000 12:00 UTC. 40 | private const val UTC_2000 = 946728000000L 41 | 42 | /**@param sunset Time of sunset (civil twilight) in milliseconds or -1 in the case the day or night never ends 43 | * @param sunrise Time of sunrise (civil twilight) in milliseconds or -1 in the case the day or night never ends.*/ 44 | class TwilightResult(@Suppress("unused") val time: Long, val sunset: Long, val sunrise: Long, val isDay: Boolean) 45 | 46 | /** 47 | * calculates the civil twilight bases on time and geo-coordinates. 48 | * 49 | * @param time time in milliseconds. 50 | * @param latitude latitude in degrees. 51 | * @param longitude latitude in degrees. 52 | */ 53 | fun calculateTwilight(time: Long, latitude: Double, longitude: Double): TwilightResult { 54 | val daysSince2000 = (time - UTC_2000).toDouble() / DateUtils.DAY_IN_MILLIS 55 | // mean anomaly 56 | val meanAnomaly = 6.240059968 + daysSince2000 * 0.01720197 57 | // true anomaly 58 | val trueAnomaly = 59 | meanAnomaly + C1 * sin(meanAnomaly) + C2 * sin((2.0 * meanAnomaly)) + C3 * sin((3.0 * meanAnomaly)) 60 | // ecliptic longitude 61 | val solarLng = trueAnomaly + 1.796593063 + Math.PI 62 | // solar transit in days since 2000 63 | val arcLongitude = -longitude / 360.0 64 | val n = (daysSince2000 - J0 - arcLongitude).roundToLong().toDouble() 65 | val solarTransitJ2000 = (n + J0 + arcLongitude + 0.0053 * sin(meanAnomaly) 66 | + -0.0069 * sin(2.0 * solarLng)) 67 | // declination of sun 68 | val solarDec = asin(sin(solarLng) * sin(OBLIQUITY)) 69 | val latRad = latitude * DEGREES_TO_RADIANS 70 | val cosHourAngle = 71 | (sin(ALTITUDE_CORRECTION_CIVIL_TWILIGHT) - sin(latRad) * sin(solarDec)) / (cos(latRad) * cos(solarDec)) 72 | // The day or night never ends for the given date and location, if this value is out of 73 | // range. 74 | if (cosHourAngle >= 1.0) { 75 | return TwilightResult(time, -1, -1, false) 76 | } else if (cosHourAngle <= -1.0) { 77 | return TwilightResult(time, -1, -1, true) 78 | } 79 | val hourAngle = (acos(cosHourAngle) / (2.0 * Math.PI)) 80 | val sunset = ((solarTransitJ2000 + hourAngle) * DateUtils.DAY_IN_MILLIS).roundToLong() + UTC_2000 81 | val sunrise = ((solarTransitJ2000 - hourAngle) * DateUtils.DAY_IN_MILLIS).roundToLong() + UTC_2000 82 | val isDay = (time in (sunrise + 1) until sunset) 83 | return TwilightResult(time, sunset, sunrise, isDay) 84 | } 85 | } 86 | -------------------------------------------------------------------------------- /app/src/main/res/drawable/ic_launcher_background.xml: -------------------------------------------------------------------------------- 1 | 2 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 | 56 | 58 | 60 | 62 | 64 | 66 | 68 | 70 | 72 | 74 | 75 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | ############################################################################## 4 | ## 5 | ## Gradle start up script for UN*X 6 | ## 7 | ############################################################################## 8 | 9 | # Attempt to set APP_HOME 10 | # Resolve links: $0 may be a link 11 | PRG="$0" 12 | # Need this for relative symlinks. 13 | while [ -h "$PRG" ] ; do 14 | ls=`ls -ld "$PRG"` 15 | link=`expr "$ls" : '.*-> \(.*\)$'` 16 | if expr "$link" : '/.*' > /dev/null; then 17 | PRG="$link" 18 | else 19 | PRG=`dirname "$PRG"`"/$link" 20 | fi 21 | done 22 | SAVED="`pwd`" 23 | cd "`dirname \"$PRG\"`/" >/dev/null 24 | APP_HOME="`pwd -P`" 25 | cd "$SAVED" >/dev/null 26 | 27 | APP_NAME="Gradle" 28 | APP_BASE_NAME=`basename "$0"` 29 | 30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 31 | DEFAULT_JVM_OPTS="" 32 | 33 | # Use the maximum available, or set MAX_FD != -1 to use that value. 34 | MAX_FD="maximum" 35 | 36 | warn () { 37 | echo "$*" 38 | } 39 | 40 | die () { 41 | echo 42 | echo "$*" 43 | echo 44 | exit 1 45 | } 46 | 47 | # OS specific support (must be 'true' or 'false'). 48 | cygwin=false 49 | msys=false 50 | darwin=false 51 | nonstop=false 52 | case "`uname`" in 53 | CYGWIN* ) 54 | cygwin=true 55 | ;; 56 | Darwin* ) 57 | darwin=true 58 | ;; 59 | MINGW* ) 60 | msys=true 61 | ;; 62 | NONSTOP* ) 63 | nonstop=true 64 | ;; 65 | esac 66 | 67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 68 | 69 | # Determine the Java command to use to start the JVM. 70 | if [ -n "$JAVA_HOME" ] ; then 71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 72 | # IBM's JDK on AIX uses strange locations for the executables 73 | JAVACMD="$JAVA_HOME/jre/sh/java" 74 | else 75 | JAVACMD="$JAVA_HOME/bin/java" 76 | fi 77 | if [ ! -x "$JAVACMD" ] ; then 78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 79 | 80 | Please set the JAVA_HOME variable in your environment to match the 81 | location of your Java installation." 82 | fi 83 | else 84 | JAVACMD="java" 85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 86 | 87 | Please set the JAVA_HOME variable in your environment to match the 88 | location of your Java installation." 89 | fi 90 | 91 | # Increase the maximum file descriptors if we can. 92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 93 | MAX_FD_LIMIT=`ulimit -H -n` 94 | if [ $? -eq 0 ] ; then 95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 96 | MAX_FD="$MAX_FD_LIMIT" 97 | fi 98 | ulimit -n $MAX_FD 99 | if [ $? -ne 0 ] ; then 100 | warn "Could not set maximum file descriptor limit: $MAX_FD" 101 | fi 102 | else 103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 104 | fi 105 | fi 106 | 107 | # For Darwin, add options to specify how the application appears in the dock 108 | if $darwin; then 109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 110 | fi 111 | 112 | # For Cygwin, switch paths to Windows format before running java 113 | if $cygwin ; then 114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 116 | JAVACMD=`cygpath --unix "$JAVACMD"` 117 | 118 | # We build the pattern for arguments to be converted via cygpath 119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 120 | SEP="" 121 | for dir in $ROOTDIRSRAW ; do 122 | ROOTDIRS="$ROOTDIRS$SEP$dir" 123 | SEP="|" 124 | done 125 | OURCYGPATTERN="(^($ROOTDIRS))" 126 | # Add a user-defined pattern to the cygpath arguments 127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 129 | fi 130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 131 | i=0 132 | for arg in "$@" ; do 133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 135 | 136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 138 | else 139 | eval `echo args$i`="\"$arg\"" 140 | fi 141 | i=$((i+1)) 142 | done 143 | case $i in 144 | (0) set -- ;; 145 | (1) set -- "$args0" ;; 146 | (2) set -- "$args0" "$args1" ;; 147 | (3) set -- "$args0" "$args1" "$args2" ;; 148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;; 149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 154 | esac 155 | fi 156 | 157 | # Escape application args 158 | save () { 159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 160 | echo " " 161 | } 162 | APP_ARGS=$(save "$@") 163 | 164 | # Collect all arguments for the java command, following the shell quoting and substitution rules 165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 166 | 167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong 168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then 169 | cd "$(dirname "$0")" 170 | fi 171 | 172 | exec "$JAVACMD" "$@" 173 | -------------------------------------------------------------------------------- /app/src/main/java/com/android/dayandnightdetector/MainActivity.kt: -------------------------------------------------------------------------------- 1 | package com.android.dayandnightdetector 2 | 3 | import android.Manifest 4 | import android.annotation.TargetApi 5 | import android.content.Context 6 | import android.content.pm.PackageManager 7 | import android.location.Location 8 | import android.os.* 9 | import androidx.appcompat.app.AppCompatActivity 10 | import androidx.core.content.ContextCompat 11 | import com.google.android.gms.location.* 12 | import com.lb.twilight_calculator.TwilightCalculator 13 | import kotlinx.android.synthetic.main.activity_main.* 14 | import java.util.* 15 | 16 | class MainActivity : AppCompatActivity() { 17 | private lateinit var locationCallback: LocationCallback 18 | private var requestingLocationUpdates: Boolean = false 19 | private lateinit var fusedLocationClient: FusedLocationProviderClient 20 | @TargetApi(Build.VERSION_CODES.M) 21 | override fun onCreate(savedInstanceState: Bundle?) { 22 | super.onCreate(savedInstanceState) 23 | setContentView(R.layout.activity_main) 24 | //https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/services/core/java/com/android/server/twilight/TwilightService.java 25 | //https://android.googlesource.com/platform/frameworks/support/+/androidx-master-dev/appcompat/src/main/java/androidx/appcompat/app/TwilightCalculator.java 26 | //https://developer.android.com/training/location/retrieve-current https://developer.android.com/training/location/receive-location-updates 27 | fusedLocationClient = LocationServices.getFusedLocationProviderClient(this) 28 | locationCallback = object : LocationCallback() { 29 | override fun onLocationResult(locationResult: LocationResult?) { 30 | if (locationResult == null) { 31 | textView.text = "failed to get location for some reason" 32 | } else { 33 | showDayNightInfo(locationResult.lastLocation) 34 | stopLocationUpdates() 35 | } 36 | } 37 | } 38 | } 39 | 40 | fun showDayNightInfo(location: Location) { 41 | val timeFormat = android.text.format.DateFormat.getTimeFormat(this) 42 | val twilightCalculator = TwilightCalculator 43 | val date = Date() 44 | val twilightResult = 45 | twilightCalculator.calculateTwilight(date.time, location.latitude, location.longitude) 46 | val isDay = twilightResult.isDay 47 | val sunRiseText: String 48 | if (twilightResult.sunrise != -1L) { 49 | val sunRiseCal = Calendar.getInstance() 50 | sunRiseCal.timeInMillis = twilightResult.sunrise 51 | sunRiseText = "day starts at ${timeFormat.format(sunRiseCal.time)}" 52 | } else { 53 | sunRiseText = "day/night never ends" 54 | } 55 | val sunSetText: String 56 | if (twilightResult.sunset != -1L) { 57 | val sunSetCal = Calendar.getInstance() 58 | sunSetCal.timeInMillis = twilightResult.sunset 59 | sunSetText = "night starts at ${timeFormat.format(sunSetCal.time)}" 60 | } else { 61 | sunSetText = "day/night never ends" 62 | } 63 | val textOfNow = "current time to check:${formatDateUsingDeviceSettings(this, date)} ${formatTimeUsingDeviceSettings(this, date)}" 64 | textView.text = "got location:$location\n$sunRiseText\n$sunSetText" + "\n$textOfNow \nis it day now? $isDay" 65 | } 66 | 67 | @TargetApi(Build.VERSION_CODES.M) 68 | override fun onResume() { 69 | super.onResume() 70 | when (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)) { 71 | PackageManager.PERMISSION_DENIED -> { 72 | textView.text = 73 | "need location permission to calculate when is day/night in your area" 74 | requestPermissions(arrayOf(Manifest.permission.ACCESS_COARSE_LOCATION), 1) 75 | } 76 | PackageManager.PERMISSION_GRANTED -> { 77 | textView.text = "getting location and then deciding if it is day or night..." 78 | // Log.d("AppLog", "PERMISSION_GRANTED") 79 | // fusedLocationClient.requestLocationUpdates(object: LocationRequest() {},null ) 80 | if (!requestingLocationUpdates) 81 | startLocationUpdates() 82 | } 83 | } 84 | } 85 | 86 | private fun startLocationUpdates() { 87 | if (requestingLocationUpdates || ContextCompat.checkSelfPermission( 88 | this, 89 | Manifest.permission.ACCESS_COARSE_LOCATION 90 | ) != PackageManager.PERMISSION_GRANTED 91 | ) 92 | return 93 | requestingLocationUpdates = true 94 | fusedLocationClient.requestLocationUpdates( 95 | LocationRequest().setPriority(LocationRequest.PRIORITY_LOW_POWER), 96 | locationCallback, 97 | null 98 | ) 99 | } 100 | 101 | override fun onPause() { 102 | super.onPause() 103 | stopLocationUpdates() 104 | } 105 | 106 | private fun stopLocationUpdates() { 107 | requestingLocationUpdates = false 108 | fusedLocationClient.removeLocationUpdates(locationCallback) 109 | } 110 | 111 | companion object { 112 | fun formatDateUsingDeviceSettings(context: Context, date: Date?): String { 113 | if (date == null) 114 | return "" 115 | val dateFormat = android.text.format.DateFormat.getDateFormat(context) 116 | return dateFormat.format(date) 117 | } 118 | 119 | fun formatTimeUsingDeviceSettings(context: Context, date: Date?): String { 120 | if (date == null) 121 | return "" 122 | val timeFormat = android.text.format.DateFormat.getTimeFormat(context) 123 | return timeFormat.format(date) 124 | } 125 | } 126 | } 127 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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