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So what is the reason behind this app launcher icon keepin mipmap instead of drawables

A large number of Android Devices uses a higher resolutionlauncher icons

mipmap-mdpimipmap-hdpimipmap-xhdpimipmap-xxhdpi

This all folder will not remove after publishing in playstorebut drawable will keep only specific varient drawable

A layout defines the visual structure for a user interface such as ui for an activity or app widget

All layouts are the subclasses of the viewGroup class and each subclass provides unique way to display the views we nest within it

Linear layout organises its children into single horizontal or vertical row . It creates a scrollbar if the length of the window exceeds the length go the screen

Relative Layout enables us to specify the location of child view relative to each other

Constraint Layout allows positioning Childers to each other and the parent . But also offers other powerful positioning and sizing strategies including horizontal or vertical child “chains” with custom spacing, arbitrary horizontal/vertical “guidelines” and custom child size aspect ratios

FrameLayout blocks out an area on the screen to display a single item

Grid layout displays items in a two dimensional scrollable grid

When we click homeback pressonPauseonStop

And openonRestartonStartonResume

If we click bacokpressonPauseonStoponDestroy

Again recent screen openonCreateonStartonResumeonPauseonStoponDestroy

Another again comes backonRestart will callonStart callonResume()

Three types of compiler

1. Kt to java byte code operation
2. D8 making Dex file support
3. R8 is shrinking code

Here are some useful Gradle/adb commands for executing this example:

• ./gradlew clean build - Build the entire example and execute unit and integration tests plus lint check.
• ./gradlew installDebug - Install the debug apk on the current connected device.
• ./gradlew runUnitTests - Execute domain and data layer tests (both unit and integration).
• ./gradlew runAcceptanceTests - Execute espresso and instrumentation acceptance tests.

shift + ctrl + left and right to select allmove left and right

shift + ctrl longpress keydown up for returnctrl + A + backspace - to clear all

shift + ctrl + F = find string and other filedouble space - to filei n project levelcommand + E - Recent changesCtrl + shift + R

./gradlew app:dependencies./gradlew yourmodule:dependencies > dependency.txt

./gradlew testDebugUnitTest

./gradlew assembleRelease --stacktrace

Handler(Looper.getMainLooper()).post(Runnable {logError(tag, "running 1 ${Thread.currentThread().name}")

})

CoroutineScope(Dispatchers.IO).launch {logError(tag = tag, "IntentService")}

https://stackoverflow.com/questions/60672406/how-to-use-coroutine-in-kotlin-to-call-a-function-every-second

// Repeat a function in coroutines

fun repeatFun(): Job {return coroutineScope.launch {
while(isActive) {//do your network request heredelay(1000)}}}

//start the loopval repeatFun = repeatRequest()

//Cancel the looprepeatFun.cancel()

—————————————————wgethttps://dl.google.com/android/repository/platform-tools-latest-darwin.zip