In this article, we are going to learn to place an image on the touched coordinates on the screen. We can insert multiple images on the screen. onTouchListener will be used to get the coordinates of the touched position on the screen so that the image can be inserted at that position. A sample GIF is given below to get an idea about what we are going to do in this article. Note that we are going to implement this project using the Kotlin language.
Step by Step Implementation
Step 1: Create a New Project
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Kotlin as the programming language.
Step 2: Set RelativeLayout in the layout
Navigate to the app > res > layout > activity_main.xml and add the below code to that file. Below is the code for the activity_main.xml file.
<? xml version = "1.0" encoding = "utf-8" ?>
< RelativeLayout android:id = "@+id/layout"
android:layout_width = "match_parent"
android:layout_height = "match_parent"
tools:context = ".MainActivity" >
</ RelativeLayout >
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Step 3: Working with the MainActivity.kt file
Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.
import android.annotation.SuppressLint
import android.os.Bundle
import android.view.MotionEvent
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.RelativeLayout
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
lateinit var areaLayout: RelativeLayout
@SuppressLint ( "ClickableViewAccessibility" )
override fun onCreate(savedInstanceState: Bundle?) {
super .onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
areaLayout = findViewById(R.id.layout)
areaLayout.setOnTouchListener { view, event ->
if (event.action == MotionEvent.ACTION_DOWN) {
val x = event.x.toInt() // get x-Coordinate
val y = event.y.toInt() // get y-Coordinate
val lp = RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT) // Assuming you use a RelativeLayout
val iv = ImageView(applicationContext)
lp.setMargins(x, y, 0 , 0 ) // set margins
iv.layoutParams = lp
iv.setImageDrawable(resources.getDrawable(R.drawable.flower)) // set the image from drawable
(view as ViewGroup).addView(iv) // add a View programmatically to the ViewGroup
}
true
}
}
} |
Now, run the app
Output:
Source Code: Click Here