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Lab49 Mobile Coding Exercise

Welcome to the Lab49 Android coding exercise. Please read this document carefully and complete the setup steps before your interview begins.

Prerequisites

You will need the following installed and working on your machine before the interview.

Android Studio

Download and install the latest stable release of Android Studio from: https://developer.android.com/studio

Android Studio bundles a JDK and the Android SDK Manager — both are required.

During or after installation, use the SDK Manager (Settings > Languages & Frameworks > Android SDK) to install:

  • Android SDK Platform 37 (API level 37)
  • Android SDK Build-Tools 37.0.0
  • Android Emulator (if you plan to run the app on a virtual device)

Java 21

The project uses a JVM toolchain targeting Java 21. Android Studio ships with a suitable JDK, but verify by running:

java -version

You should see openjdk 21 (or higher). If not, install JDK 21 from https://adoptium.net and ensure it is on your PATH.

Recommended Device Setup

To run the app on a device during the interview, set up one of the following ahead of time:

Android Emulator (recommended): In Android Studio, open the Device Manager (View > Tool Windows > Device Manager) and create a virtual device running API level 28 or higher.

Physical device: Enable Developer Options and USB Debugging on your Android device and connect it via USB.

Project Setup

Download the project zip file from the URL provided by your recruiter to a local directory. The zip file is password-protected — the password will be provided at the start of your interview.

Questions?

If you have any trouble getting the project to build before the interview, please reach out to your recruiter so we can help you resolve it ahead of time.

About

Kotlin coding assessment projects

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Readme
Activity
Custom properties

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
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Lab49 Mobile Coding Exercise
Welcome to the Lab49 Android coding exercise. Please read this document carefully and complete the setup steps before your interview begins.
Prerequisites
You will need the following installed and working on your machine before the interview.
Android Studio
Download and install the latest stable release of Android Studio from:
https://developer.android.com/studio
Android Studio bundles a JDK and the Android SDK Manager — both are required.
During or after installation, use the SDK Manager (Settings > Languages & Frameworks > Android SDK) to install:
  • Android SDK Platform 37 (API level 37)
  • Android SDK Build-Tools 37.0.0
  • Android Emulator (if you plan to run the app on a virtual device)
Java 21
The project uses a JVM toolchain targeting Java 21. Android Studio ships with a suitable JDK, but verify by running:
java -version

You should see openjdk 21 (or higher). If not, install JDK 21 from https://adoptium.net and ensure it is on your PATH.
Recommended Device Setup
To run the app on a device during the interview, set up one of the following ahead of time:
Android Emulator (recommended): In Android Studio, open the Device Manager (View > Tool Windows > Device Manager) and create a virtual device running API level 28 or higher.
Physical device: Enable Developer Options and USB Debugging on your Android device and connect it via USB.
Project Setup
Download the project zip file from the URL provided by your recruiter to a local directory. The zip file is password-protected — the password will be provided at the start of your interview.
Questions?
If you have any trouble getting the project to build before the interview, please reach out to your recruiter so we can help you resolve it ahead of time.
About
Kotlin coding assessment projects
Resources
Readme
Activity
Custom properties
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
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Lab49 Mobile Coding Exercise
Welcome to the Lab49 Android coding exercise. Please read this document carefully and complete the setup steps before your interview begins.
Prerequisites
You will need the following installed and working on your machine before the interview.
Android Studio
Download and install the latest stable release of Android Studio from:
https://developer.android.com/studio
Android Studio bundles a JDK and the Android SDK Manager — both are required.
During or after installation, use the SDK Manager (Settings > Languages & Frameworks > Android SDK) to install:
  • Android SDK Platform 37 (API level 37)
  • Android SDK Build-Tools 37.0.0
  • Android Emulator (if you plan to run the app on a virtual device)
Java 21
The project uses a JVM toolchain targeting Java 21. Android Studio ships with a suitable JDK, but verify by running:
java -version

You should see openjdk 21 (or higher). If not, install JDK 21 from https://adoptium.net and ensure it is on your PATH.
Recommended Device Setup
To run the app on a device during the interview, set up one of the following ahead of time:
Android Emulator (recommended): In Android Studio, open the Device Manager (View > Tool Windows > Device Manager) and create a virtual device running API level 28 or higher.
Physical device: Enable Developer Options and USB Debugging on your Android device and connect it via USB.
Project Setup
Download the project zip file from the URL provided by your recruiter to a local directory. The zip file is password-protected — the password will be provided at the start of your interview.
Questions?
If you have any trouble getting the project to build before the interview, please reach out to your recruiter so we can help you resolve it ahead of time.
About
Kotlin coding assessment projects
Resources
Readme
Activity
Custom properties
Stars
0 stars
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0 watching
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0 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
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Lab49CodingExercises_mobile.zip
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Repository files navigation
Lab49 Mobile Coding Exercise
Welcome to the Lab49 Android coding exercise. Please read this document carefully and complete the setup steps before your interview begins.
Prerequisites
You will need the following installed and working on your machine before the interview.
Android Studio
Download and install the latest stable release of Android Studio from:
https://developer.android.com/studio
Android Studio bundles a JDK and the Android SDK Manager — both are required.
During or after installation, use the SDK Manager (Settings > Languages & Frameworks > Android SDK) to install:
  • Android SDK Platform 37 (API level 37)
  • Android SDK Build-Tools 37.0.0
  • Android Emulator (if you plan to run the app on a virtual device)
Java 21
The project uses a JVM toolchain targeting Java 21. Android Studio ships with a suitable JDK, but verify by running:
java -version

You should see openjdk 21 (or higher). If not, install JDK 21 from https://adoptium.net and ensure it is on your PATH.
Recommended Device Setup
To run the app on a device during the interview, set up one of the following ahead of time:
Android Emulator (recommended): In Android Studio, open the Device Manager (View > Tool Windows > Device Manager) and create a virtual device running API level 28 or higher.
Physical device: Enable Developer Options and USB Debugging on your Android device and connect it via USB.
Project Setup
Download the project zip file from the URL provided by your recruiter to a local directory. The zip file is password-protected — the password will be provided at the start of your interview.
Questions?
If you have any trouble getting the project to build before the interview, please reach out to your recruiter so we can help you resolve it ahead of time.
About
Kotlin coding assessment projects
Resources
Readme
Activity
Custom properties
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - lab49/kotlin-coding-assessment: Kotlin coding assessment projects · GitHub
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Lab49CodingExercises_mobile.zip
Lab49CodingExercises_mobile.zip
README.md
README.md
Repository files navigation
Lab49 Mobile Coding Exercise
Welcome to the Lab49 Android coding exercise. Please read this document carefully and complete the setup steps before your interview begins.
Prerequisites
You will need the following installed and working on your machine before the interview.
Android Studio
Download and install the latest stable release of Android Studio from:
https://developer.android.com/studio
Android Studio bundles a JDK and the Android SDK Manager — both are required.
During or after installation, use the SDK Manager (Settings > Languages & Frameworks > Android SDK) to install:
  • Android SDK Platform 37 (API level 37)
  • Android SDK Build-Tools 37.0.0
  • Android Emulator (if you plan to run the app on a virtual device)
Java 21
The project uses a JVM toolchain targeting Java 21. Android Studio ships with a suitable JDK, but verify by running:
java -version

You should see openjdk 21 (or higher). If not, install JDK 21 from https://adoptium.net and ensure it is on your PATH.
Recommended Device Setup
To run the app on a device during the interview, set up one of the following ahead of time:
Android Emulator (recommended): In Android Studio, open the Device Manager (View > Tool Windows > Device Manager) and create a virtual device running API level 28 or higher.
Physical device: Enable Developer Options and USB Debugging on your Android device and connect it via USB.
Project Setup
Download the project zip file from the URL provided by your recruiter to a local directory. The zip file is password-protected — the password will be provided at the start of your interview.
Questions?
If you have any trouble getting the project to build before the interview, please reach out to your recruiter so we can help you resolve it ahead of time.
About
Kotlin coding assessment projects
Resources
Readme
Activity
Custom properties
Stars
0 stars
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0 watching
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0 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - lab49/kotlin-coding-assessment: Kotlin coding assessment projects · GitHub
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Lab49CodingExercises_mobile.zip
Lab49CodingExercises_mobile.zip
README.md
README.md
Repository files navigation
Lab49 Mobile Coding Exercise
Welcome to the Lab49 Android coding exercise. Please read this document carefully and complete the setup steps before your interview begins.
Prerequisites
You will need the following installed and working on your machine before the interview.
Android Studio
Download and install the latest stable release of Android Studio from:
https://developer.android.com/studio
Android Studio bundles a JDK and the Android SDK Manager — both are required.
During or after installation, use the SDK Manager (Settings > Languages & Frameworks > Android SDK) to install:
  • Android SDK Platform 37 (API level 37)
  • Android SDK Build-Tools 37.0.0
  • Android Emulator (if you plan to run the app on a virtual device)
Java 21
The project uses a JVM toolchain targeting Java 21. Android Studio ships with a suitable JDK, but verify by running:
java -version

You should see openjdk 21 (or higher). If not, install JDK 21 from https://adoptium.net and ensure it is on your PATH.
Recommended Device Setup
To run the app on a device during the interview, set up one of the following ahead of time:
Android Emulator (recommended): In Android Studio, open the Device Manager (View > Tool Windows > Device Manager) and create a virtual device running API level 28 or higher.
Physical device: Enable Developer Options and USB Debugging on your Android device and connect it via USB.
Project Setup
Download the project zip file from the URL provided by your recruiter to a local directory. The zip file is password-protected — the password will be provided at the start of your interview.
Questions?
If you have any trouble getting the project to build before the interview, please reach out to your recruiter so we can help you resolve it ahead of time.
About
Kotlin coding assessment projects
Resources
Readme
Activity
Custom properties
Stars
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - lab49/kotlin-coding-assessment: Kotlin coding assessment projects · GitHub
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Lab49CodingExercises_mobile.zip
README.md
README.md
Repository files navigation
Lab49 Mobile Coding Exercise
Welcome to the Lab49 Android coding exercise. Please read this document carefully and complete the setup steps before your interview begins.
Prerequisites
You will need the following installed and working on your machine before the interview.
Android Studio
Download and install the latest stable release of Android Studio from:
https://developer.android.com/studio
Android Studio bundles a JDK and the Android SDK Manager — both are required.
During or after installation, use the SDK Manager (Settings > Languages & Frameworks > Android SDK) to install:
  • Android SDK Platform 37 (API level 37)
  • Android SDK Build-Tools 37.0.0
  • Android Emulator (if you plan to run the app on a virtual device)
Java 21
The project uses a JVM toolchain targeting Java 21. Android Studio ships with a suitable JDK, but verify by running:
java -version

You should see openjdk 21 (or higher). If not, install JDK 21 from https://adoptium.net and ensure it is on your PATH.
Recommended Device Setup
To run the app on a device during the interview, set up one of the following ahead of time:
Android Emulator (recommended): In Android Studio, open the Device Manager (View > Tool Windows > Device Manager) and create a virtual device running API level 28 or higher.
Physical device: Enable Developer Options and USB Debugging on your Android device and connect it via USB.
Project Setup
Download the project zip file from the URL provided by your recruiter to a local directory. The zip file is password-protected — the password will be provided at the start of your interview.
Questions?
If you have any trouble getting the project to build before the interview, please reach out to your recruiter so we can help you resolve it ahead of time.
About
Kotlin coding assessment projects
Resources
Readme
Activity
Custom properties
Stars
0 stars
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
GitHub - lab49/kotlin-coding-assessment: Kotlin coding assessment projects · GitHub
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Repository files navigation
Lab49 Mobile Coding Exercise
Welcome to the Lab49 Android coding exercise. Please read this document carefully and complete the setup steps before your interview begins.
Prerequisites
You will need the following installed and working on your machine before the interview.
Android Studio
Download and install the latest stable release of Android Studio from:
https://developer.android.com/studio
Android Studio bundles a JDK and the Android SDK Manager — both are required.
During or after installation, use the SDK Manager (Settings > Languages & Frameworks > Android SDK) to install:
  • Android SDK Platform 37 (API level 37)
  • Android SDK Build-Tools 37.0.0
  • Android Emulator (if you plan to run the app on a virtual device)
Java 21
The project uses a JVM toolchain targeting Java 21. Android Studio ships with a suitable JDK, but verify by running:
java -version

You should see openjdk 21 (or higher). If not, install JDK 21 from https://adoptium.net and ensure it is on your PATH.
Recommended Device Setup
To run the app on a device during the interview, set up one of the following ahead of time:
Android Emulator (recommended): In Android Studio, open the Device Manager (View > Tool Windows > Device Manager) and create a virtual device running API level 28 or higher.
Physical device: Enable Developer Options and USB Debugging on your Android device and connect it via USB.
Project Setup
Download the project zip file from the URL provided by your recruiter to a local directory. The zip file is password-protected — the password will be provided at the start of your interview.
Questions?
If you have any trouble getting the project to build before the interview, please reach out to your recruiter so we can help you resolve it ahead of time.
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