# Sample Activities

This section provides detailed documentation for the sample activities included in the MultiSet Android SDK. These activities demonstrate how to implement VPS localization and object tracking in your Android application.

## Available Activities

### [MainActivity](https://docs.multiset.ai/native-support/android-native/sample-activities/mainactivity)

The entry point for the SDK demo application. Handles SDK initialization, authentication, and navigation to both the AR localization and object tracking activities. Displays a card-based UI with a Localization card (mode picker + Start button) and an Object Tracking card.

### [MultiSetLocalizationActivity](https://docs.multiset.ai/native-support/android-native/sample-activities/multisetlocalizationactivity)

Unified AR localization activity that supports both single-frame and multi-frame localization modes. The mode is selected at launch time via an intent extra.

### [ObjectTrackingActivity](https://docs.multiset.ai/native-support/android-native/sample-activities/objecttrackingactivity)

Dedicated AR activity for detecting and tracking pre-registered physical objects. Once an object is tracked, its 3D mesh is fetched from the MultiSet platform and rendered in the AR scene with an animated glowing outline shader.

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## Localization Mode Comparison

| Feature         | Single-Frame       | Multi-Frame         |
| --------------- | ------------------ | ------------------- |
| Frames captured | 1                  | 4–6 (configurable)  |
| Accuracy        | Good               | Better              |
| Capture time    | Instant            | \~2–3 seconds       |
| Network usage   | Lower              | Higher              |
| Best for        | Quick localization | Precise positioning |

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## Object Tracking at a Glance

| Feature              | Description                                             |
| -------------------- | ------------------------------------------------------- |
| Supported objects    | Up to 10 simultaneously                                 |
| Mesh rendering       | GLB fetched from platform, outline-only animated shader |
| Auto-tracking        | Starts automatically on session ready                   |
| Background tracking  | Periodic re-tracking after first success                |
| Confidence filtering | Rejects low-confidence results automatically            |

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## Getting Started

1. Initialize the SDK and authenticate in `MainActivity`
2. **For localization:** configure `LocalizationConfig`, then launch `MultiSetLocalizationActivity`
3. **For object tracking:** configure `ObjectTrackingConfig`, then launch `ObjectTrackingActivity`

See [LocalizationConfig](https://docs.multiset.ai/native-support/android-native/api-reference/localizationconfig) and [ObjectTrackingConfig](https://docs.multiset.ai/native-support/android-native/api-reference/objecttrackingconfig) for full configuration options.