How to build an AI chatbot using Google’s Gemini APIs in Kotlin in Android App?

This video shows the steps to build your own AI Chabot from scratch. In this demo it uses the Google’s Gemini APIs to build the chatbot in Kotlin language.

It refers below document for quickstarter guide:
https://ai.google.dev/tutorials/android_quickstart#kotlin

For APIKey generation, one can use below link:
https://aistudio.google.com/app/apikey

I hope you like this video. For any questions, suggestions or appreciation please contact us at: https://programmerworld.co/contact/ or email at: programmerworld1990@gmail.com

Complete source code and other details:

package com.programmerworld.geminiaichatbbot

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.EditText
import com.google.ai.client.generativeai.Chat
import com.google.ai.client.generativeai.GenerativeModel
import com.google.ai.client.generativeai.type.content
import kotlinx.coroutines.MainScope
import kotlinx.coroutines.launch

class MainActivity : AppCompatActivity() {

    lateinit var editTextInput: EditText
    lateinit var editTextOutput: EditText

    lateinit var chat: Chat
    var stringBuilder: StringBuilder = java.lang.StringBuilder()

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

        editTextInput = findViewById(R.id.editTextInput)
        editTextOutput = findViewById(R.id.editTextOutput)

        val generativeModel = GenerativeModel(
            // For text-only input, use the gemini-pro model
            modelName = "gemini-pro",
            // Access your API key as a Build Configuration variable (see "Set up your API key" above)
            apiKey = "AIzaSyDxTPhR0l6hQl5VrKjRsMn8aa-sSFL3kDg"
        )
        chat = generativeModel.startChat(
            history = listOf(
                content(role = "user") { text("Hello, I have 2 dogs in my house.") },
                content(role = "model") { text("Great to meet you. What would you like to know?") }
            )
        )
        stringBuilder.append("Hello, I have 2 dogs in my house.\n\n")
        stringBuilder.append("Great to meet you. What would you like to know?\n\n")

        editTextOutput.setText(stringBuilder.toString())
    }

    public fun buttonSendChat(view: View){
        stringBuilder.append(editTextInput.text.toString() + "\n\n")
        MainScope().launch {
            var result = chat.sendMessage(editTextInput.text.toString())
            stringBuilder.append(result.text + "\n\n")

            editTextOutput.setText(stringBuilder.toString())
            editTextInput.setText("")
        }
    }
}
plugins {
    id("com.android.application")
    id("org.jetbrains.kotlin.android")
}

android {
    namespace = "com.programmerworld.geminiaichatbbot"
    compileSdk = 34

    defaultConfig {
        applicationId = "com.programmerworld.geminiaichatbbot"
        minSdk = 33
        targetSdk = 34
        versionCode = 1
        versionName = "1.0"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            isMinifyEnabled = false
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

dependencies {

    implementation("androidx.core:core-ktx:1.12.0")
    implementation("androidx.appcompat:appcompat:1.6.1")
    implementation("com.google.android.material:material:1.11.0")
    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.google.ai.client.generativeai:generativeai:0.2.0")
}
<?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.GeminiAIChatbbot"
        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">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="3dp"
        android:onClick="buttonSendChat"
        android:text="Send"
        app:layout_constraintStart_toEndOf="@+id/editTextInput"
        app:layout_constraintTop_toBottomOf="@+id/editTextOutput" />

    <EditText
        android:id="@+id/editTextOutput"
        android:layout_width="416dp"
        android:layout_height="638dp"
        android:ems="10"
        android:gravity="bottom|start"
        android:hint="Output displayed here ..."
        android:inputType="textMultiLine"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <EditText
        android:id="@+id/editTextInput"
        android:layout_width="320dp"
        android:layout_height="90dp"
        android:ems="10"
        android:gravity="start|top"
        android:hint="Input here ..."
        android:inputType="textMultiLine"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editTextOutput" />

</androidx.constraintlayout.widget.ConstraintLayout>

Screenshots:

Complete Project Folder can be accessed from the below path Link on payment of USD 9:

https://drive.google.com/file/d/1nHuECU-L4s5UWfn3AdWpJgrevsPfyscH/view?usp=drive_link

Excerpt:

This content provides a video tutorial on how to create an AI Chatbot using Google’s Gemini APIs in Kotlin language. It includes a quickstart guide, API key generation link, and a YouTube demonstration.

The content further shares the complete source code for the Android application with package names, classes, XML layout files, and build configuration details. Additionally, it provides screenshots of the project and offers access to the full project folder upon payment.

Key Resources:

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