How to get the Touch position on an android device using kotlin?

Kotlin Apps/ApplicationsMobile Development

This example demonstrates how to get the Touch position on an android device 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"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="8dp"
   tools:context="MainActivity">
   <EditText
      android:id="@+id/editTextX"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:hint="Points on X-Axis" />
   <EditText
      android:id="@+id/editTextY"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_below="@+id/editTextX"
      android:hint="Points on Y-Axis" />
   <TextView
      android:id="@+id/textView"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_below="@id/editTextY"
      android:clickable="true"
      android:focusable="true"
      android:text="Touch to get co-ordinates"
      android:textAlignment="center"
      android:textColor="@android:color/background_dark"
      android:textSize="24sp"
      android:textStyle="bold" />
</RelativeLayout>

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

Example

import android.os.Bundle
import android.widget.EditText
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   lateinit var textView: TextView
   lateinit var editTextX: EditText
   lateinit var editTextY: EditText
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      editTextX = findViewById(R.id.editTextX)
      editTextY = findViewById(R.id.editTextY)
      textView = findViewById(R.id.textView)
      textView.setOnTouchListener {
         _, event ->
         val x = event.x
         val y = event.y
         editTextX.setText(x.toString())
         editTextY.setText(y.toString())
         true
      }
   }
}

Step 4 − Add the following code to androidManifest.xml

Example

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.myapplication">
   <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

raja
Published on 23-May-2020 17:15:38
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