mattintech/AndroidTestApp

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CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

This is an Android application project using Gradle with Kotlin DSL. The project uses modern Android development practices with AndroidX libraries and targets Android 12+ (minSdk 32).

Build Commands

# 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

# Run all tests
./gradlew test connectedAndroidTest

# Check for lint issues
./gradlew lint

# Install debug APK on connected device
./gradlew installDebug

# Run a specific test class
./gradlew test --tests "com.mattintech.androidtestapp.ExampleUnitTest"

# Run tests with additional output
./gradlew test --info

Project Structure

App Module: app/ - Main application module
- Source code: app/src/main/java/com/mattintech/androidtestapp/
- Unit tests: app/src/test/java/com/mattintech/androidtestapp/
- Instrumented tests: app/src/androidTest/java/com/mattintech/androidtestapp/
- Resources: app/src/main/res/
- Manifest: app/src/main/AndroidManifest.xml
Gradle Configuration:
- Project-level: build.gradle.kts
- App-level: app/build.gradle.kts
- Version catalog: gradle/libs.versions.toml
- Gradle wrapper: gradle/wrapper/ (Gradle 8.11.1)

Key Configuration

Package name: com.mattintech.androidtestapp
Application ID: com.mattintech.androidtestapp
Target SDK: 35 (Android 15)
Min SDK: 32 (Android 12)
Compile SDK: 35
Test runner: androidx.test.runner.AndroidJUnitRunner

Development Notes

This is currently a minimal Android project template. When developing:

The project uses Gradle Version Catalog (libs.versions.toml) for dependency management
All build configuration uses Kotlin DSL (.kts files)
The project is set up for both unit tests (JUnit) and instrumented tests (Espresso)
No custom lint rules are configured - default Android lint rules apply

App Features

This is a demo app for testing device stress scenarios with three main features:

1. Battery Draining Feature

Tests battery consumption through various hardware components:

User-configurable options:

Test duration (minutes/hours)
CPU intensive operations (mathematical calculations, loops)
Screen (maximum brightness, prevent sleep)
Flashlight (continuous or strobe)
GPS (high accuracy location updates)
BLE scanning (continuous discovery)
WiFi scanning
Network activity (continuous data transfers)
Sensors (accelerometer, gyroscope, magnetometer - continuous reading)
Camera (preview without recording)
Audio (silent playback to keep audio subsystem active)
Vibration (continuous patterns)

Presets:

"Maximum Drain" - All features enabled
"CPU & GPU Focus" - CPU calculations + screen brightness
"Radio Focus" - GPS + BLE + WiFi scanning
"Sensor Focus" - All sensors + vibration

2. Bad Behavior Feature

Intentionally causes app crashes and ANRs for testing:

Crash types (user-selectable):

Division by zero
Null pointer exception
Out of memory error
Stack overflow
Array index out of bounds

ANR triggers (user-selectable):

UI thread blocking (long-running operation on main thread)
Broadcast receiver timeout
Service timeout

Settings:

Frequency: Manual trigger or random intervals (configurable)
Auto-restart: App automatically restarts after crash

3. Downloader Feature

Schedules and executes file downloads: