Clipboard listener Android kotlin example

Create a class MainActivity.kt

import android.content.ClipData
import android.content.ClipboardManager
import android.content.Context
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.TextView
import kotlinx.android.synthetic.main.activity_main.*
import java.util.*
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        // Get the clipboard system service
        val clipboard = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
        // Set clipboard primary clip change listener
        clipboard.addPrimaryClipChangedListener {
            val textToPaste:String = clipboard.primaryClip?.getItemAt(0)?.text.toString().trim()
            textInputEditText.setText(textToPaste)
        }
        // Set a random uuid to text view
        textView.text = UUID.randomUUID().toString()
        textView.setOnClickListener {
            (it as TextView).text = UUID.randomUUID().toString()
        }
        btnCopy.setOnClickListener {
            // Copy text to clipboard
            val textToCopy = textView.text
            val clip = ClipData.newPlainText("RANDOM UUID",textToCopy)
            clipboard.primaryClip = clip
        }
    }
}

Create a layout activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <com.google.android.material.button.MaterialButton
        android:id="@+id/btnCopy"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:text="Copy To Clipboard"
        android:backgroundTint="#87421F"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        tools:text="UUID HERE"
        android:textColor="#0072BB"
        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/btnCopy" />
    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/textInputLayout"
        android:layout_width="409dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="8dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView">
        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/textInputEditText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="UUID" />
    </com.google.android.material.textfield.TextInputLayout>
</androidx.constraintlayout.widget.ConstraintLayout>