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+# Android Test App
+
+A demonstration Android application designed for testing device stress scenarios and app behavior under various conditions. This app provides three main testing features: battery draining, intentional bad behavior (crashes/ANRs), and download scheduling.
+
+## Features
+
+### 1. Battery Drainer
+Tests battery consumption through intensive use of device hardware components:
+
+- **CPU Operations**: Mathematical calculations and intensive loops
+- **Display**: Maximum brightness with screen always on
+- **Flashlight**: Continuous or strobe patterns
+- **GPS**: High-accuracy location updates
+- **Bluetooth**: Continuous BLE scanning
+- **WiFi**: Network scanning
+- **Sensors**: Accelerometer, gyroscope, magnetometer continuous reading
+- **Camera**: Preview without recording
+- **Audio**: Silent playback to keep audio subsystem active
+- **Vibration**: Continuous patterns
+
+**Presets Available:**
+- Maximum Drain (all features enabled)
+- CPU & GPU Focus
+- Radio Focus (GPS, BLE, WiFi)
+- Sensor Focus
+
+### 2. Bad Behavior Simulator
+Intentionally triggers app crashes and ANRs for testing crash reporting and monitoring systems:
+
+**Crash Types:**
+- Division by zero
+- Null pointer exception
+- Out of memory error
+- Stack overflow
+- Array index out of bounds
+
+**ANR Triggers:**
+- UI thread blocking
+- Broadcast receiver timeout
+- Service timeout
+
+**Configuration Options:**
+- Manual or automatic triggering
+- Random intervals
+- Auto-restart after crash
+
+### 3. Download Manager
+Schedules and executes file downloads with configurable parameters:
+
+- Custom or preset download URLs
+- File size options (1MB, 10MB, 100MB, custom)
+- Scheduling: one-time, repeating, or specific times
+- Network preferences (WiFi only, cellular only, any)
+- Concurrent download support (1-10 simultaneous)
+- Background download capability
+- Download history tracking
+
+## Requirements
+
+- Android 12+ (API level 32)
+- Target SDK: Android 15 (API level 35)
+
+## Permissions
+
+The app requires the following permissions (automatically requested on launch):
+- Camera
+- Location (Fine and Coarse)
+- Bluetooth (Scan and Connect)
+- Internet and Network State
+- WiFi State
+- Vibrate
+- Wake Lock
+- Foreground Service
+- External Storage (for downloads)
+- High Sampling Rate Sensors
+
+## Building the Project
+
+### Prerequisites
+- Android Studio (latest stable version recommended)
+- JDK 17 or higher
+- Android SDK with API level 35
+
+### Build Commands
+
+```bash
+# Clean build artifacts
+./gradlew clean
+
+# Build debug APK
+./gradlew assembleDebug
+
+# Build release APK
+./gradlew assembleRelease
+
+# Run unit tests
+./gradlew test
+
+# Run instrumented tests (requires connected device/emulator)
+./gradlew connectedAndroidTest
+
+# Check for lint issues
+./gradlew lint
+
+# Install debug APK on connected device
+./gradlew installDebug
+```
+
+## Project Structure
+
+```
+AndroidTestApp/
+├── app/
+│   ├── src/
+│   │   ├── main/
+│   │   │   ├── java/com/mattintech/androidtestapp/
+│   │   │   ├── res/
+│   │   │   └── AndroidManifest.xml
+│   │   ├── test/
+│   │   └── androidTest/
+│   └── build.gradle.kts
+├── gradle/
+│   ├── wrapper/
+│   └── libs.versions.toml
+├── build.gradle.kts
+└── settings.gradle.kts
+```
+
+## Architecture
+
+- **MainActivity**: Launch screen with navigation to three feature activities
+- **BatteryDrainActivity**: Configure and run battery drain tests
+- **BadBehaviorActivity**: Configure and trigger crashes/ANRs
+- **DownloaderActivity**: Configure and manage downloads
+- **Background Services**: Handle battery drain and download operations
+- **Permission Manager**: Handles runtime permission requests
+
+## Usage
+
+1. Launch the app
+2. Grant requested permissions
+3. Select one of the three testing features from the main menu
+4. Configure test parameters as needed
+5. Start the test and monitor results
+
+## Development
+
+This project uses:
+- Kotlin as the primary language
+- Gradle with Kotlin DSL for build configuration
+- AndroidX libraries
+- Version catalog for dependency management
+
+## Warning
+
+⚠️ **This app is designed for testing purposes only!** It intentionally:
+- Drains battery rapidly
+- Causes app crashes and system stress
+- Consumes network bandwidth
+- Uses device resources intensively
+
+Use responsibly and only on test devices or when specifically needed for development/testing purposes.
+
+## License
+
+This is a test application for development purposes.
+
+## Contributing
+
+This is a demonstration project. Feel free to fork and modify for your testing needs.