How to show a dependency tree

./gradlew [module:]dependencies

How to build an Android app

./gradlew assemble[buildVariant]

How to install an Android app

./gradlew install[buildVariant]

Testing

How to run a local unit test

./gradlew [module:]test[buildVariant]UnitTest

How to run an instrumented test

./gradlew [module:]connected[buildVariant]AndroidTest

Meaning of task clean in project-level build.gradle

The following custom task in the project-level build.gradle is to delete the project-level build directory when clicking the menu bar > Build > Clean Project.

task clean(type: Delete) {
    delete rootProject.buildDir
}

String

How to encode HTML entities

val encoded: String = "<>&'\"".htmlEncode() // &lt;&gt;&amp;&#39;&quot;

How to decode HTML entities

val decoded: String = String =
    Html.fromHtml("&lt;&gt;&amp;&#39;&quot;", Html.FROM_HTML_MODE_COMPACT).toString() // <>&'"

String.htmlEncode is a part of the Core KTX library and is syntactic sugar for TextUtils.htmlEncode .

How to convert AARRGGBB as Int to Color

val color: Color = Color.valueOf(0x11223344)

How to close DrawerLayout when the user taps the Back button

/** isOpen and close() require "androidx.drawerlayout:drawerlayout:1.1.0" or higher. */
override fun onBackPressed() {
    if (drawerLayout.isOpen) {
        drawerLayout.close()
        return
    }
    super.onBackPressed()
}