Pick an Image from the Gallery – Android Studio - Kotlin

How to pick an image from the Gallery?

In this video, we will pick an image from Gallery on Button click and set that image to an ImageView. 

For this, we will also handle Runtime Permission for READ_EXTERNAL_STORAGE if the system OS is Marshmallow or above. If you want to learn to pick Multiple Images from Gallery you can check for Java OR Kotlin.

>>Check For Java

VIDEO:

Step 1: Create a new Project or open new project

Step 2: Code

AndroidManifest.xml

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

    <!--Adding Read External Storage Permission-->
    <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>

activity_main.xml

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

    <!--ImageView where image will be set-->
    <ImageView
        android:id="@+id/image_view"
        android:scaleType="centerCrop"
        android:src="@drawable/ic_image_black_24dp"
        android:layout_width="400dp"
        android:layout_height="400dp" />
    <!--Button to pick image-->
    <Button
        android:id="@+id/img_pick_btn"
        android:text="Choose Image"
        style="@style/Base.Widget.AppCompat.Button.Colored"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

MainActivity.kt

package com.blogspot.atifsoftwares.imagepick_kotlin

import android.Manifest
import android.app.Activity
import android.content.Intent
import android.content.pm.PackageManager
import android.os.Build
import android.os.Build.*
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        //BUTTON CLICK
        img_pick_btn.setOnClickListener {
            //check runtime permission
            if (VERSION.SDK_INT >= VERSION_CODES.M){
                if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) ==
                        PackageManager.PERMISSION_DENIED){
                    //permission denied
                    val permissions = arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE);
                    //show popup to request runtime permission
                    requestPermissions(permissions, PERMISSION_CODE);
                }
                else{
                    //permission already granted
                    pickImageFromGallery();
                }
            }
            else{
                //system OS is < Marshmallow
                pickImageFromGallery();
            }
        }
    }

    private fun pickImageFromGallery() {
        //Intent to pick image
        val intent = Intent(Intent.ACTION_PICK)
        intent.type = "image/*"
        startActivityForResult(intent, IMAGE_PICK_CODE)
    }

    companion object {
        //image pick code
        private val IMAGE_PICK_CODE = 1000;
        //Permission code
        private val PERMISSION_CODE = 1001;
    }

    //handle requested permission result
    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        when(requestCode){
            PERMISSION_CODE -> {
                if (grantResults.size >0 && grantResults[0] ==
                        PackageManager.PERMISSION_GRANTED){
                    //permission from popup granted
                    pickImageFromGallery()
                }
                else{
                    //permission from popup denied
                    Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show()
                }
            }
        }
    }

    //handle result of picked image
    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        if (resultCode == Activity.RESULT_OK && requestCode == IMAGE_PICK_CODE){
            image_view.setImageURI(data?.data)
        }
    }
}

Step 3: Run Project

Output