ChatGPT Like App in Android using Open API

 implementation ("com.android.volley:volley:1.2.0")
 //add the latest version of volley

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

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

 <RelativeLayout   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:background="@color/black"

tools:context=".MainActivity">

 <ScrollView

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_above="@id/idTILQuery"

android:layout_alignParentTop="true"

android:layout_margin="5dp"

android:padding="5dp">

 <LinearLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

//Question Textview 

 <TextView

android:id="@+id/idTVQuestion"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_marginTop="30dp"

android:padding="4dp"

android:text="Question"

android:textColor="@color/white"

android:textSize="17sp" />

//chat GPT response

 <TextView

android:id="@+id/idTVResponse"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_marginTop="5dp"

android:padding="4dp"

android:text="Response"

android:textColor="@color/white"

android:textSize="15sp" />

 </LinearLayout>

 </ScrollView>

 <com.google.android.material.textfield.TextInputLayout

android:id="@+id/idTILQuery"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true"

android:layout_margin="5dp"

android:hint="Enter your query"

android:padding="5dp"

android:textColorHint="@color/white"

app:hintTextColor="@color/white">

 <com.google.android.material.textfield.TextInputEditText

android:id="@+id/idEdtQuery"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:drawableEnd="@drawable/ic_send"

android:drawableTint="@color/white"

android:ems="10"

android:imeOptions="actionSend"

android:importantForAutofill="no"

android:inputType="textEmailAddress"

android:textColor="@color/white"

android:textColorHint="@color/white"

android:textSize="14sp" />

 </com.google.android.material.textfield.TextInputLayout>

 </RelativeLayout>

 package com.validate.myapplication

 import android.content.Context

 import android.os.Bundle

 import android.util.Log

 import android.view.inputmethod.EditorInfo

 import android.widget.TextView

 import android.widget.TextView.OnEditorActionListener

 import android.widget.Toast

 import androidx.appcompat.app.AppCompatActivity

 import com.android.volley.RequestQueue

 import com.android.volley.Response

 import com.android.volley.RetryPolicy

 import com.android.volley.VolleyError

 import com.android.volley.toolbox.JsonObjectRequest

 import com.android.volley.toolbox.Volley

 import com.google.android.material.textfield.TextInputEditText

 import org.json.JSONObject

class MainActivity : AppCompatActivity() {

 // creating variables on the below line.

 lateinit var responseTV: TextView

 lateinit var questionTV: TextView

 lateinit var queryEdt: TextInputEditText

 var url = "https://api.openai.com/v1/completions"

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

// initializing variables on the below line.

responseTV = findViewById(R.id.idTVResponse)

questionTV = findViewById(R.id.idTVQuestion)

queryEdt = findViewById(R.id.idEdtQuery)

queryEdt.setOnEditorActionListener(OnEditorActionListener { v, actionId, event ->

if (actionId == EditorInfo.IME_ACTION_SEND) {

// setting response tv on below line.

responseTV.text = "Please wait.."

// validating text

if (queryEdt.text.toString().length > 0) {

// calling get response to get the response.

getResponse(queryEdt.text.toString())

} else {

Toast.makeText(this, "Please enter your query..", Toast.LENGTH_SHORT).show()

}

return@OnEditorActionListener true

}

false

})

}

private fun getResponse(query: String) {

// setting text for question on below line.

questionTV.text = query

queryEdt.setText("")

// creating a queue for request queue.

val queue: RequestQueue = Volley.newRequestQueue(applicationContext)

// creating a JSON object on the below line.

val jsonObject: JSONObject? = JSONObject()

// adding params to the json object.

jsonObject?.put("model", "text-davinci-003")

jsonObject?.put("prompt", query)

jsonObject?.put("temperature", 0)

jsonObject?.put("max_tokens", 100)

jsonObject?.put("top_p", 1)

jsonObject?.put("frequency_penalty", 0.0)

jsonObject?.put("presence_penalty", 0.0)

// on the below line making a json object request.

val postRequest: JsonObjectRequest =

// on the below line making a json object request.

object : JsonObjectRequest(Method.POST, url, jsonObject,

Response.Listener { response ->

// on the below line getting a response message and setting it to text view.

val responseMsg: String =

response.getJSONArray("choices").getJSONObject(0).getString("text")

responseTV.text = responseMsg

},Response.ErrorListener { error ->

Log.e("TAGAPI", "Error is : " + error.message + "\n" + error)

}) {

override fun getHeaders(): kotlin.collections.MutableMap<kotlin.String, kotlin.String> {

val params: MutableMap<String, String> = HashMap()

// adding headers on the below line.

params["Content-Type"] = "application/json"

params["Authorization"] =

"Bearer Enter your token here"

return params;

}

 } 

 // on the below line adding a retry policy for our request.

 postRequest.setRetryPolicy(object : RetryPolicy {

 override fun getCurrentTimeout(): Int {

 return 50000

 }

 override fun getCurrentRetryCount(): Int {

 return 50000

 }

 @Throws(VolleyError::class)

 override fun retry(error: VolleyError) {

 }

 })

 queue.add(postRequest)

 }

 }