Move View with Keyboard Using Kotlin in Android

How to Move View with Keyboard Using Kotlin in Android

Kotlin is a powerful programming language that can be used to create Android applications. In this tutorial, we will show how to move a view with the keyboard using Kotlin in Android. We will create a simple application that will allow us to move a view in any direction we choose.

Step 1: Adding Kotlin to Our Project

To get started, open your project's build.gradle file. Add the line "apply plugin: 'kotlin-android'", and then sync your project.

Step 2: Setting Up the Layout

Next, we need to set up our layout. Create an XML file called activity_main.xml and add the following code to it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Move me with your keyboard!"
        android:id="@+id/textview"/>
</LinearLayout>

Step 3: Adding the Code

Open your activity_main.kt file and add the following code.

import android.os.Bundle
import android.view.KeyEvent
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
   lateinit var textView: TextView

   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      textView = findViewById(R.id.textview)
   }

   override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
      when (keyCode) {
         KeyEvent.KEYCODE_DPAD_DOWN -> textView.y+=50
         KeyEvent.KEYCODE_DPAD_UP -> textView.y-=50
         KeyEvent.KEYCODE_DPAD_LEFT -> textView.x-=50
         KeyEvent.KEYCODE_DPAD_RIGHT -> textView.x+=50
      }
      return super.onKeyDown(keyCode, event)
   }
}

Step 4: Running the Application

Now that our code is complete, we can run our application. You should see a text view that can be moved with the directional pad on your keyboard. Congratulations! You have successfully created an application that can move a view with the keyboard using Kotlin in Android.