If you want, tell me your device model and Android version and whether the TL‑WN722N is v1/v2/v3 — I will produce the most specific next steps.
TP-Link TL-WN722N Go to product viewer dialog for this item.
Uses the Atheros AR9271 chipset. This is the "holy grail" for Android and Linux because it has the best driver support and supports monitor mode natively.