Emulator setup and usage in Android Kotlin - Mini App: Build & Ship

Build: Emulator Setup Guide

This screen guides users through setting up and using the Android emulator for app testing.

Target UI

---------------------------------
| Emulator Setup Guide           |
|-------------------------------|
| 1. Install Android Studio      |
| 2. Open AVD Manager           |
| 3. Create a new Virtual Device|
| 4. Start the Emulator         |
|                               |
| [Start Emulator] [Help]       |
---------------------------------

Display step-by-step instructions for emulator setup

Two buttons: 'Start Emulator' and 'Help'

'Start Emulator' button triggers a toast message 'Emulator started!'

'Help' button opens a dialog with additional tips

Starter Code

Android Kotlin

package com.example.emulatorsetup

import android.os.Bundle
import android.widget.Button
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity

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

        // TODO: Initialize buttons and set click listeners
    }
}

Task 1

Task 2

Task 3

Solution

Android Kotlin

package com.example.emulatorsetup

import android.os.Bundle
import android.widget.Button
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity

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

        val startButton: Button = findViewById(R.id.startEmulatorButton)
        val helpButton: Button = findViewById(R.id.helpButton)

        startButton.setOnClickListener {
            Toast.makeText(this, "Emulator started!", Toast.LENGTH_SHORT).show()
        }

        helpButton.setOnClickListener {
            AlertDialog.Builder(this)
                .setTitle("Emulator Help")
                .setMessage("1. Make sure Android Studio is installed.\n2. Use AVD Manager to create devices.\n3. Start emulator before running apps.")
                .setPositiveButton("OK", null)
                .show()
        }
    }
}

This code sets up two buttons on the screen. When the user taps the 'Start Emulator' button, a short message (Toast) appears confirming the emulator started. When the 'Help' button is tapped, a dialog box shows helpful tips for setting up the emulator. This simple UI guides beginners through emulator usage with clear feedback.

Final Result

Completed Screen

---------------------------------
| Emulator Setup Guide           |
|-------------------------------|
| 1. Install Android Studio      |
| 2. Open AVD Manager           |
| 3. Create a new Virtual Device|
| 4. Start the Emulator         |
|                               |
| [Start Emulator] [Help]       |
---------------------------------

Tapping 'Start Emulator' shows a toast message 'Emulator started!' at the bottom.

Tapping 'Help' opens a dialog with emulator setup tips and an OK button to close.

Stretch Goal

Add a feature to open the Android Virtual Device Manager from the app.

💡 Hint

Use an Intent with action 'android.intent.action.MAIN' and category 'android.intent.category.LAUNCHER' targeting the AVD Manager package if available.