DayNightMode

夜间模式切换实践

可改变主题、字体、图片、背景等，效果图如下:

Name		Name	Last commit message	Last commit date
Latest commit History 9 Commits
.idea		.idea
app		app
gradle/wrapper		gradle/wrapper
.gitignore		.gitignore
README.md		README.md
art.gif		art.gif
build.gradle		build.gradle
gradle.properties		gradle.properties
gradlew		gradlew
gradlew.bat		gradlew.bat
settings.gradle		settings.gradle

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