Host-Based Card Service Controls
NFC Card Emulator puts the main HCE workflow on one compact control screen. Users can see the service status, check which scenario file is selected, start or stop the card-emulation service, and return to communication logs without navigating through a large settings tree. This makes it practical to prepare a reader session before bringing a compatible NFC terminal close to the phone.
The screen also keeps the next action visible: choose a file, manage saved scenarios, or start the service. The app's Host-Based Card Emulation design is aimed at APDU communication exercises, so the control flow suits developers who need a repeatable way to trigger and inspect a smart-card reader workflow.
TXT APDU Scenario File Management
A prepared TXT scenario is the starting point for the app's communication workflow. Manage File opens a focused file-selection page where users can review the selected profile, choose a saved entry, use the selected file, or remove it when a scenario is no longer useful. These actions keep APDU command sets separate from the service controls on the home screen.
The same page offers Browse and Import entry points for adding a new file, giving developers a direct path from a local command script to a usable HCE scenario. Keeping files selectable and replaceable is valuable when a reader integration needs several transaction sequences, response variations, or regression checks.
Communication Logs for APDU Workflows
Communication Logs give the app a dedicated place to follow exchanges between the emulated card and a smart-card reader. After selecting an APDU command file, a developer can start the HCE service, exercise the reader flow, stop the service, and return to the log area when comparing a new sequence with an earlier one. This layout keeps control, input, and feedback close together.
The workflow is especially useful for teams building or debugging terminal integrations because the app is organized around prepared command scenarios rather than casual NFC tapping. Visa- and Mastercard-style sample sequences in the companion project provide a concrete starting point for experimenting with structured APDU conversations in an authorized lab setup.
NFC Reader Integration and Practical Scope
The app is designed for a phone with NFC and HCE support, where an emulated smart card can respond to a compatible reader using the selected APDU scenario. That makes it a focused utility for Android developers, QA engineers, and engineers validating terminal communication, not a general-purpose wallet or card-storage app.
A useful session starts with a prepared TXT command file, continues with the service controls, and ends by reviewing the communication log. The workflow can help isolate reader behavior and repeat a known exchange, while the product's stated scope avoids copying an existing physical NFC card. Users should work with authorized card-communication scenarios and device hardware that supports the required HCE features.
