Kotlin Basics

Install in Studio

Go to File --> Settings -->Pluins-->install jet brains plugin-->select kotlin -->Download and install

Restart IDE

Sample Project
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Create new project
Open MainActivity and then type ctrl+Alt+shft+k
File gets converted to kotlin file

Access UI components in Kotlin file
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Add this import in MainActivity.java "import kotlinx.android.synthetic.main.activity_main.textView;"

Access directly in oncreate as follows

textView.setText("This is kotlin example")

Done build and run:)