How to pick an image from an image gallery on Android using Kotlin

This example demonstrates how to pick an image from an image gallery on Android 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.

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

   android:layout_width="fill_parent"

   android:layout_height="fill_parent"

   android:orientation="vertical"

   android:padding="2dp">

   <ImageView

      android:id="@+id/imageView"

      android:layout_width="match_parent"

      android:layout_height="wrap_content"

      android:layout_weight="1" />

   <Button

      android:id="@+id/buttonLoadPicture"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_gravity="center"

      android:layout_weight="0"

      android:text="Load Picture" />

</LinearLayout>

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

class MainActivity : AppCompatActivity() {

   lateinit var imageView: ImageView

   lateinit var button: Button

   private val pickImage = 100

   private var imageUri: Uri? = null

   override fun onCreate(savedInstanceState: Bundle?) {

      super.onCreate(savedInstanceState)

      setContentView(R.layout.activity_main)

      title = "KotlinApp"

      imageView = findViewById(R.id.imageView)

      button = findViewById(R.id.buttonLoadPicture)

      button.setOnClickListener {

         val gallery = Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI)

         startActivityForResult(gallery, pickImage)

      }

   }

   override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {

      super.onActivityResult(requestCode, resultCode, data)

      if (resultCode == RESULT_OK && requestCode == pickImage) {

         imageUri = data?.data

         imageView.setImageURI(imageUri)

      }

   }

}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.q11">

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

   <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 kotlin example device with your computer. To run the app from android studio, open one of your project's activity files and click the Run iconPlay from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen.