how to make a app for android tv version 9

Grok 4.3

Answer: To make an app for Android TV version 9, start by setting up Android Studio with the Leanback library and targeting API level 28 while following Android TV design guidelines.

Begin by installing Android Studio and creating a new project selecting the TV template to include necessary dependencies like the Leanback support library for a TV-friendly interface. Configure the build.gradle file to set minSdkVersion to 21 and targetSdkVersion to 28 to ensure compatibility with Android 9. Implement a user interface using fragments and activities optimized for remote control navigation, avoiding touch-specific elements. Test the app on an Android TV emulator or device running Android 9, focusing on performance and layout scaling for larger screens.

Gemini 3.5 Flash

Answer: Developing an app for Android TV version 9 (API 28) involves configuring an Android Studio project with a Leanback launcher activity, designing a 10-foot user interface optimized for D-pad navigation, and declaring TV-specific hardware requirements in the manifest.

To build an app specifically targeting Android TV version 9 (API Level 28), you must start by setting up your development environment in Android Studio. Create a new project and configure your build.gradle file, setting the minSdkVersion to 28 (or lower if you want broader backward compatibility) and the targetSdkVersion to 28 or higher. The most critical step lies in configuring the AndroidManifest.xml to signify that this is a TV app. You must declare that a touchscreen is not required by adding <uses-feature android:name="android.hardware.touchscreen" android:required="false" />. Additionally, you must declare support for the Leanback UI by adding <uses-feature android:name="android.software.leanback" android:required="true" />. Finally, designate your main TV activity by adding an intent-filter containing the <category android:name="android.intent.category.LEANBACK_LAUNCHER" /> tag. Designing for the '10-foot user interface' is vital. Android TV users navigate using a D-pad remote control rather than a touchscreen. Therefore, you must ensure that all interactive UI elements are clearly focusable and have visible selected states. While modern apps are moving toward Jetpack Compose for TV, the Android Leanback UI toolkit remains highly robust and fully compatible with API 28, offering pre-built templates for media browsing and playback. Before publishing, rigorously test your application. You can set up an Android Virtual Device (AVD) running Android TV (API 28) in Android Studio, or connect a physical Android TV device via ADB (Android Debug Bridge). Make sure your app conforms to Google's Android TV App Quality guidelines, focusing on proper aspect ratios, banner assets, and D-pad navigation flow.

GPT-5.5

Answer: To make an app for Android TV version 9, build a native Android app in Android Studio using Kotlin or Java, target Android 9/API 28 or higher, and add Android TV-specific manifest, UI, and remote-control support.

Start by installing Android Studio and creating a new Android project. Use Kotlin if you are starting fresh, because it is the recommended language for modern Android development. Set your app to support Android 9 by configuring the SDK versions in your Gradle file. Android 9 is API level 28, so your app should have `targetSdk` 28 or higher, and `minSdk` should be low enough for the devices you want to support. For Android TV, you must declare TV support in `AndroidManifest.xml`. Add a Leanback launcher intent so the app appears on Android TV, and mark touchscreen as not required because TV devices usually use a remote, not touch input. Example manifest parts: ```xml <uses-feature android:name="android.hardware.touchscreen" android:required="false" /> <uses-feature android:name="android.software.leanback" android:required="true" /> <application android:banner="@drawable/banner"> <activity android:name=".MainActivity" android:exported="true"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LEANBACK_LAUNCHER" /> </intent-filter> </activity> </application> ``` Design the app for TV screens, not phones. Use large text, simple navigation, clear focus states, and layouts that work from about 10 feet away. Every button, card, and menu item should be usable with a D-pad remote. You can build the interface using regular Android views, Jetpack Compose, or the AndroidX Leanback library. Leanback is useful for classic TV layouts such as rows of movie cards, details pages, and playback screens. Test the app using an Android TV emulator in Android Studio. Create a virtual device such as Android TV with API 28, then test navigation using keyboard arrow keys or a remote-control emulator. If your app plays video, use ExoPlayer/Media3. If it streams content, make sure you handle buffering, network errors, subtitles, playback controls, and focus behavior correctly. Finally, generate a signed APK or Android App Bundle, test it on a real Android TV 9 device if possible, and publish it through Google Play Console with Android TV screenshots, banner image, and TV-compatible metadata.

Claude Opus 4.7

Answer: To build an Android TV app for Android 9 (API level 28), use Android Studio with the Leanback support library, set minSdkVersion to 28, and follow the TV-specific UI and input guidelines.

Here is a step-by-step path to create an Android TV app targeting Android 9 (Pie, API 28): 1. Set up the environment: Install the latest Android Studio, then via the SDK Manager install the Android 9 (API 28) SDK platform and the Android TV system image for emulator testing. 2. Create the project: In Android Studio choose File > New > New Project > TV > Android TV Activity. This scaffolds a project with the Leanback library, a BrowseFragment, and the required TV manifest entries. In build.gradle set: - compileSdk 28 (or higher; you can compile against newer SDKs while still supporting 9) - minSdkVersion 28 if you specifically target Android 9 and above (or lower, e.g. 21, if you want broader TV compatibility — Android TV started at API 21) - targetSdkVersion 28 if you want to target Pie specifically. 3. Configure the manifest for TV: - Declare `<uses-feature android:name="android.software.leanback" android:required="true"/>` - Declare `<uses-feature android:name="android.hardware.touchscreen" android:required="false"/>` - Your main activity must include the `android.intent.category.LEANBACK_LAUNCHER` intent filter so it shows up on the TV home screen. - Provide a banner image (320x180 xhdpi) via `android:banner` on the application or activity tag. 4. Add Leanback dependencies in build.gradle: - `implementation 'androidx.leanback:leanback:1.0.0'` - Optionally `androidx.leanback:leanback-preference` and `androidx.tvprovider:tvprovider` for channels/recommendations. 5. Build the UI with Leanback components: Use `BrowseSupportFragment` for the main browse experience, `RowsSupportFragment`, `ListRow`, `Presenter`/`CardPresenter` for content cards, and `DetailsSupportFragment` for item details. Design for the 10-foot experience: large fonts, high contrast, generous spacing, and full D-pad navigability (every focusable view must be reachable and have a visible focus state). 6. Handle media playback: For video apps use ExoPlayer with `PlaybackSupportFragment` and a `PlaybackTransportControlGlue`. Implement proper MediaSession integration so the remote's play/pause/next keys work. 7. Input handling: Test exclusively with the D-pad (KEYCODE_DPAD_UP/DOWN/LEFT/RIGHT/CENTER, BACK, MENU). Never assume touch input. Avoid web-style scrolling; use focus-driven navigation. 8. Test on Android 9: Create an AVD using the Android TV (1080p) device profile with the API 28 system image, or sideload to a real Android TV box running Pie via ADB over network (`adb connect <tv-ip>:5555`, then `adb install app.apk`). 9. Optional but recommended: Add a Home Screen Channel using the TvProvider API so your app surfaces content on the launcher, and implement global search via a SearchManager content provider. 10. Publish: Build a signed APK or App Bundle and submit through Google Play Console, opting in to the Android TV distribution and passing the TV quality checklist (D-pad navigation, banner, leanback launcher, no touch dependence). Key official references: developer.android.com/training/tv/start and the Leanback samples on GitHub (android/tv-samples). Following these gets you a compliant, working Android TV app on Android 9.

Final Summary

The AI Roundtable collectively outlines a roadmap starting with Android Studio and targeting API Level 28 for Android 9. Claude Opus 4.7 provides the most granular technical steps, while Gemini 3.5 Flash and GPT-5.5 emphasize the '10-foot UI' and essential manifest declarations. All models agree that the Leanback library is the standard for building focusable, remote-friendly layouts for version 9.

All 4 models agreed