Get Photo From Gallery / Capture from Camera

build.gradle

implementation 'com.github.florent37:runtime-permission:1.1.1'

CapturePhoto.kt

import android.Manifest
import com.github.florent37.runtimepermission.RuntimePermission
import android.provider.MediaStore
import java.util.*
import java.io.File
import android.net.Uri
import android.content.Intent

var imageUri: Uri? = null
var OPEN_CAMERA = 10
var OPEN_GALLERY = 11

button.setOnClickListener {
    askUploadSource()
}

private fun askUploadSource(){

    val options = arrayOf("Open Gallery", "Capture Photo")
    val builder = android.app.AlertDialog.Builder(this)
    builder.setTitle("Please pick your image source")
    builder.setItems(options){ _, which ->

        if(which == 0){

            // ASK PERMISSION TO OPEN GALLERY
            RuntimePermission.askPermission(this)
                .request(Manifest.permission.READ_EXTERNAL_STORAGE)
                .onAccepted{

                    // OPEN GALLERY
                    openGallery()

                }
                .ask()

        }else if(which == 1){

            // ASK PERMISSION TO OPEN CAMERA
            RuntimePermission.askPermission(this)
                .request(Manifest.permission.CAMERA)
                .onAccepted{

                    // OPEN CAMERA
                    openCamera()
                }
                .ask()

        }
    }
    builder.show()
}

fun openCamera(){
    val intent = Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    var filename = UUID.randomUUID().toString() + ".jpg"
    var file = File(this.externalCacheDir, filename)
    imageUri = Uri.fromFile(file)
    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri)
    startActivityForResult(intent, OPEN_CAMERA)
}

fun openGallery(){
    val intent = Intent(Intent.ACTION_PICK)
    intent.type = "image/*"
    startActivityForResult(intent, OPEN_GALLERY)
}

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

    if (requestCode == OPEN_GALLERY && data!= null) { imageUri = data!!.data }
    
    if (resultCode == RESULT_OK && imageUri != null) {

        // do something with the image here
        // example: imageView.setImageURI(imageUri)
       
    }

}

database.kt

fun uploadImageToFirebaseStorage(imageUri: Uri, callback: (url: String) -> Unit) {

        var filename = UUID.randomUUID().toString()
        var storageRef = FirebaseStorage.getInstance().getReference("/user_uploads/$filename.jpg")

        // UPLOAD TO FIREBASE
        storageRef.putFile(imageUri)
            .addOnSuccessListener {

                storageRef.downloadUrl.addOnSuccessListener {
                    var url = it.toString()

                    callback(url)
                }

            }
            .addOnFailureListener{
                println( it.toString())
            }
    }