How to copy text programmatically (Ctrl+C) in my Android app using Kotlin?

This example demonstrates how to copy text programmatically (Ctrl+C) in my Android app using Kotlin.

Step 1 − Create a new project in Android Studio, go to File? New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

Example

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"
   xmlns:tools="https://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:gravity="center_horizontal"
   android:orientation="vertical"
   tools:context=".MainActivity">
<TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginTop="70dp"
   android:text="Tutorials Point"
   android:textAlignment="center"
   android:textColor="@android:color/holo_green_dark"
   android:textSize="32sp"
   android:textStyle="bold" />
<EditText
   android:id="@+id/editText"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_marginTop="100dp"
   android:hint="Enter your text" />
<Button
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginTop="5dp"
   android:onClick="copyText"
   android:text="Copy text" />
<Button
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginTop="5dp"
   android:onClick="pasteText"
   android:text="Paste text" />
<TextView
   android:textColor="@android:color/holo_red_dark"
   android:id="@+id/textView"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginTop="30dp"
   android:textSize="24sp"
   android:textStyle="bold" />
</LinearLayout>

Step 3 − Add the following code to src/MainActivity.kt

import android.content.ClipData
import android.content.ClipboardManager
import android.content.Context
import android.os.Bundle
import android.view.View
import android.widget.EditText
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   lateinit var editText: EditText
   lateinit var textView: TextView
   lateinit var clipboardManager: ClipboardManager
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      editText = findViewById(R.id.editText)
      textView = findViewById(R.id.textView)
   }
   fun copyText(view: View) {
      val text = editText.text.toString()
      if (text.isNotEmpty()) {
         clipboardManager = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
         val clipData = ClipData.newPlainText("key", text)
         clipboardManager.setPrimaryClip(clipData)
         Toast.makeText(applicationContext, "Copied", Toast.LENGTH_SHORT).show()
      } else {
         Toast.makeText(applicationContext, "No text to be copied", Toast.LENGTH_SHORT).show()
      }
   }
   fun pasteText(view: View) {
      val clipData: ClipData = clipboardManager.primaryClip!!
      val item: ClipData.Item = clipData.getItemAt(0)
      textView.text = item.text.toString()
      Toast.makeText(applicationContext, "Text is being Pasted", Toast.LENGTH_SHORT).show()
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="https://schemas.android.com/apk/res/android" package="com.example.q11">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen