Connect your app to the outside world, whether it's through Bluetooth, Wi‑Fi or cellular network, USB, or another standard protocol.
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Common protocols

Android supports a variety of standard communication protocols.
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Support USB accessory and host modes.
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Add 5G capabilities to your app.
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Enable devices to communicate within 4 cm or less.
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Develop and test a VPN client.
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Manage audio and video calls on Android.
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Measure precise ranging between devices.

Bluetooth

Use the Bluetooth protocol that matches your app needs and use cases.
Exchange data with other devices.
Exchange smaller data chunks using less energy.
Receive high-fidelity audio using less energy.

Wi‑Fi

Use the Wi-Fi protocol that matches your app needs and use cases.
Scan for Wi-Fi access points.
Enable direct device connections between any devices.
Enable direct connections between Android 8.0+ devices.
Measure distances between nearby access points and devices.

Optimize your app for connectivity

Get the most out of using communications technology with your app.
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Reduce latency and increase network request throughput.
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Preserve battery usage.