Scrollable readonly EditView in Kotlin

 Scrollable readonly EditView in Kotlin

In the view xml file: 
<EditText
        android:id="@+id/etResult"
        android:layout_width="match_parent"
        android:layout_height="343dp"
        android:background="@color/backgroundColor"
        android:backgroundTint="#00000000"
        android:ems="10"
        android:enabled="true"
        android:fontFamily="sans-serif-condensed"
        android:gravity="start|top"
        android:hint="@string/blankfoldermessage"
        android:importantForAutofill="no"
        android:inputType="none"
        android:paddingTop="2dp"
        android:singleLine="false"
        tools:targetApi="o" />

in the kotlin file (init function): 

etResult.keyListener = null

this will allow the edit text to be multiline, not editable but scrollable. 

Simple use of Timer in Kotlin

the code below will set the button to clickable after 30 sec:

btnOk.isClickable=false

Timer().schedule(timerTask {

    btnOk.isClickable=true

}, 1000*30)

the above code runs in a separate thread, 

so the UI is responsive while running this code.

Working with UI controls from Non main thread in Kotlin

import org.jetbrains.anko.doAsync
import org.jetbrains.anko.uiThread

fun anyFunction(){

doAsync {

      // Normal code inside Async thread

      I=I+1

     If(I=100){

    uiThread {

        tvResult.setText =”I is now 100!!”

      }

    }

   //More code

   If(x==0){

     uiThread {

        tvResult.setText =”there’s some problem!”

      }

   }

}

}

Note: - you can include multiple uiThread inside same doAsync

          - you can include multiple doAsync inside any function

Permission request pop up in android

Request user to give permission to read external storage in Android - (Kotlin)

if (ContextCompat.checkSelfPermission(this,
        Manifest.permission.READ_EXTERNAL_STORAGE)
    != PackageManager.PERMISSION_GRANTED) {

    // Permission is not granted    // Should we show an explanation?    if (ActivityCompat.shouldShowRequestPermissionRationale(this,
            Manifest.permission.READ_EXTERNAL_STORAGE)) {

    } else {
        // No explanation needed, we can request the permission.        ActivityCompat.requestPermissions(this,
            arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
            READ_STORAGE_CODE);

    }
} else {
    // Permission has already been granted}

NOTE: READ_STORAGE_CODE is just an int constant with fix value like 1001, or 2023

and is a variable in class level.