This is code in Kotlin, I am supposed to add/change something to make this file work, in the function labeled: inner class GVisionThread:AsyncTask() This code needs to pull text from an image using Google Vision Here is the link to it all on github: https://github.com/aaronjg50/Vision ?File begins here ------->

package com.example.aaron.vision import android.app.Activity import android.support.v7.app.AppCompatActivity import android.os.Bundle import kotlinx.android.synthetic.main.activity_main.* import android.content.Intent import android.widget.Toast import android.graphics.Bitmap import android.net.Uri import android.provider.MediaStore import android.util.Log import com.google.api.services.vision.v1.VisionRequestInitializer import com.google.api.client.extensions.android.json.AndroidJsonFactory import com.google.api.client.http.javanet.NetHttpTransport import com.google.api.services.vision.v1.Vision import java.util.* import java.nio.ByteBuffer import android.R.raw import android.os.AsyncTask import android.os.Message import com.google.api.client.util.IOUtils import com.google.api.services.vision.v1.model.* //import com.sun.tools.internal.xjc.reader.xmlschema.bindinfo.BIConversion.User import android.util.JsonReader import com.google.api.client.json.JsonToken import java.io.* class MainActivity : AppCompatActivity() { private var bitmap:Bitmap? = null private var contentURI: Uri = Uri.EMPTY private var vision:Vision? = null private var gDescription = ArrayList() //holds image description info from Google override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) go_button.setOnClickListener { getAnImage() setDescription("Got the image") } ask.setOnClickListener { setDescription("Time to show result ...") GVisionThread().execute() //talk to Google Vision in another Thread } //restore image if there is one (use after a device rotation) if (savedInstanceState != null && savedInstanceState[IMAGE_KEY] != null) { contentURI = savedInstanceState[IMAGE_KEY] as Uri showImage(contentURI) } setupVisionAPI() } private fun setupVisionAPI() { val visionBuilder = Vision.Builder( NetHttpTransport(), AndroidJsonFactory(), null) //the following uses my assigned API-key visionBuilder.setVisionRequestInitializer( VisionRequestInitializer(API_KEY)) vision = visionBuilder.build() } /** * Work with Google visionAPI and request info about the picture * based on: https://code.tutsplus.com/tutorials/how-to-use-the-google-cloud-vision-api-in-android-apps--cms-29009 */ inner class GVisionThread:AsyncTask() { private var returnedInfo = "" private var facts:List? = null override fun doInBackground(vararg arg: String?):String { Log.i(TAG, "GVisionThread") val bArray:ByteArray? = bitmap?.convertToByteArray() //convertToByteArray defined below val myImg: Image = Image() myImg.encodeContent(bArray) val desiredFeature = Feature() desiredFeature.type = "LABEL_DETECTION" val request = AnnotateImageRequest() request.image = myImg request.features = Arrays.asList(desiredFeature) val batchRequest = BatchAnnotateImagesRequest() batchRequest.requests = Arrays.asList(request) Log.i(TAG, "GVisionThread - batchRequest is built") // Talk to Google and get a description of the image Log.i(TAG, "GVisionThread - batchResponse being created") val batchResponse = vision?.images()?.annotate(batchRequest)?.execute() //Pause here waiting for Google Vision to respond if (batchResponse != null) { Log.i(TAG, "GVisionThread - batchResponse is built") } else { Log.i(TAG, "GVisionThread - batchResponse is null ---- <-------- error") } //returns a list of entityAnnotation to facts Log.i(TAG, "Number returned is ${batchResponse!!.responses.size}, respose[0] is ${batchResponse.responses[0].toString()}") returnedInfo = "${batchResponse.responses[0]}" //returned JSon info facts = batchResponse.responses[0].labelAnnotations //list of picture labels return returnedInfo } override fun onPostExecute(result: String?) { super.onPostExecute(result) buildDescription(facts) } } /** * Pull out each label description from the parameter * Build a string containing these labels and print to screen * @param labelList The List? containing the label descriptions */ private fun buildDescription(labelList: List?) { val llString = labelList.toString() val llba = llString.toByteArray(Charsets.UTF_8) val bstr = ByteArrayInputStream(llba) readJsonStream(bstr) var msg = "" if (gDescription.isNotEmpty()) { // != null) { Log.i(TAG, "GVisionThread - Building screen output") gDescription.forEach{ //labelList.forEach { //val desc = it.description Log.i(TAG, "Picture label: $it") // $desc") if (msg.length > 0) { //add new line between descriptors msg += " " } msg += it //"$desc " } } else { Log.i(TAG, "GVisionThread - labelList is null") } setDescription(msg) } /** * write passed in String to the description TextField * @param msg the String to write */ private fun setDescription(msg:String) { description.text = msg } /** * Save the image in the Bundle so it can be recovered if image is rotated * @param state The Bundle */ override fun onSaveInstanceState(state: Bundle) { super.onSaveInstanceState(state) Log.i(TAG,"onSaveInstanceState:") state.putParcelable(IMAGE_KEY,contentURI) } /** * Build an Intent to retrieve an image from the gallery * The image is returned in onActivityResult() */ private fun getAnImage() { val galleryIntent = Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI) startActivityForResult(galleryIntent, GALLERY) } /** * Called by the Android system when the image's URI is returned from the Gallery */ public override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { super.onActivityResult(requestCode, resultCode, data) if (resultCode == Activity.RESULT_CANCELED) { return } if (data != null) { contentURI = data.data showImage(contentURI) } } /** * Display the bitmap on the screen in the_image View * @param uri The Bitmap to display */ private fun showImage(uri:Uri) { try { val bmap = MediaStore.Images.Media.getBitmap(this.contentResolver, uri) val w1 = bmap.byteCount val wid = bmap.width val factor = wid / GOAL_SIZE //amount to reduce picture by Log.i(TAG,"Need to reduce image by a factor of $factor") bitmap = Bitmap.createScaledBitmap(bmap,bmap.width/factor, bmap.height/factor, false) //bitmap = bmap val w2 = bitmap!!.byteCount Log.i(TAG,"Bytecounts are: $w1 and $w2, width = $wid") the_image.setImageBitmap(bitmap) //show on screen Toast.makeText(this@MainActivity, "Image Saved!", Toast.LENGTH_SHORT).show() } catch (e: IOException) { e.printStackTrace() Toast.makeText(this@MainActivity, "Retrieval of image Failed!", Toast.LENGTH_SHORT).show() Log.i(TAG,"******ERROR***** - Retrieval of image failed") } } /** * Convert bitmap to byte array using ByteBuffer. * From Thomas Ivan at: * https://stackoverflow.com/questions/4989182/converting-java-bitmap-to-byte-array */ private fun Bitmap.convertToByteArray(): ByteArray { //minimum number of bytes that can be used to store this bitmap's pixels val size = this.byteCount Log.i(TAG,"convertToByteArray(): size = $size") //allocate new instances which will hold bitmap //var bytes = ByteArray(size) val stream = ByteArrayOutputStream() this.compress(Bitmap.CompressFormat.JPEG, 100, stream) val bytes = stream.toByteArray() return bytes } //////////////////////// Decode Json ///////////////////////// fun readJsonStream(inStream: InputStream) { val isr = InputStreamReader(inStream,"UTF-8") val reader = JsonReader(isr) readDescriptionArray(reader); } @Throws(IOException::class) fun readDescriptionArray(reader: JsonReader) { gDescription = ArrayList() reader.beginArray() //skip past Json '[' while (reader.hasNext()) { gDescription.add(readMessage(reader)) //pass next object from the array to readMessage() } reader.endArray() Log.i(TAG,"readDescriptionArray ${gDescription.toString()}") } /** * parses one line of the description info * @param reader The JsonReader tht has the information * @returns A String containing the object's name and score */ @Throws(IOException::class) fun readMessage(reader: JsonReader): String { var desc: String = "" var mid: String = "" var score: Double = 0.0 var topicality: Double = 0.0 reader.beginObject() while (reader.hasNext()) { val name = reader.nextName() if (name == "description") { desc = reader.nextString() } else if (name == "mid") { mid = reader.nextString() } else if (name == "score") { score = reader.nextDouble() } else if (name == "topicality") { topicality = reader.nextDouble() } else { reader.skipValue() } } reader.endObject() return "%.2f".format(score) + "\t $desc" } companion object { private const val TAG = "--Vision----" private const val GALLERY = 7734 private const val IMAGE_KEY = "TheImage" private const val GOAL_SIZE = 400 //good image width size for quick response from Google private const val API_KEY = //your API Key should be placed here } }