How to integrate Open AI Chat GPT model “gpt-3.5-turbo” in your Android app?

In this video it shows the steps to integrate the Chat GPT APIs of “gpt-3.5-turbo” model in your Android App. It uses Android’s volley library to call the GPT APIs from the Json object.

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Complete source code and other details:

package com.programmerworld.chatgpt35integration;

import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.android.volley.AuthFailureError;
import com.android.volley.DefaultRetryPolicy;
import com.android.volley.NetworkResponse;
import com.android.volley.Request;
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 org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.HashMap;
import java.util.Map;

public class MainActivity extends AppCompatActivity {
    private TextView textView;
    private String stringURLEndPoint = "https://api.openai.com/v1/chat/completions";
    private String stringAPIKey = "sk-8pKdd8YoyxxxxxxxxxxXXXXXbkFJX2tPPkoXzpegNelf8NS5";
    private String stringOutput = "";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView = findViewById(R.id.textView);
    }

    public void buttonChatGPT(View view){
        JSONObject jsonObject = new JSONObject();

        try {
            jsonObject.put("model", "gpt-3.5-turbo");

            JSONArray jsonArrayMessage = new JSONArray();
            JSONObject jsonObjectMessage = new JSONObject();
            jsonObjectMessage.put("role", "user");
            jsonObjectMessage.put("content", "Write a poem about clouds");
            jsonArrayMessage.put(jsonObjectMessage);

            jsonObject.put("messages", jsonArrayMessage);

        } catch (JSONException e) {
            throw new RuntimeException(e);
        }

        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST,
                stringURLEndPoint, jsonObject, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {

                String stringText = null;
                try {
                    stringText = response.getJSONArray("choices")
                            .getJSONObject(0)
                            .getJSONObject("message")
                            .getString("content");
                } catch (JSONException e) {
                    throw new RuntimeException(e);
                }

                stringOutput = stringOutput + stringText;
                textView.setText(stringOutput);
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

            }
        }){
            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                Map<String, String> mapHeader = new HashMap<>();
                mapHeader.put("Authorization", "Bearer " + stringAPIKey);
                mapHeader.put("Content-Type", "application/json");

                return mapHeader;
            }

            @Override
            protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
                return super.parseNetworkResponse(response);
            }
        };

        int intTimeoutPeriod = 60000; // 60 seconds timeout duration defined
        RetryPolicy retryPolicy = new DefaultRetryPolicy(intTimeoutPeriod,
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
        jsonObjectRequest.setRetryPolicy(retryPolicy);
        Volley.newRequestQueue(getApplicationContext()).add(jsonObjectRequest);
    }
}

plugins {
    id 'com.android.application'
}

android {
    namespace 'com.programmerworld.chatgpt35integration'
    compileSdk 33

    defaultConfig {
        applicationId "com.programmerworld.chatgpt35integration"
        minSdk 33
        targetSdk 33
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.6.1'
    implementation 'com.google.android.material:material:1.5.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'

    implementation 'com.android.volley:volley:1.2.1'

}

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

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

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.ChatGPT35Integration"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="157dp"
        android:layout_marginTop="69dp"
        android:onClick="buttonChatGPT"
        android:text="Chat GPT"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Screenshots: