Courtesy: GitHub

Android BluetoothChat Sample

This sample shows how to implement two-way text chat over Bluetooth between two Android devices, using all the fundamental Bluetooth API capabilities.


This sample should be run on two Android devices at the same time, to establish a two-way chat over Bluetooth between the devices. Select "Made discoverable" in overflow menu on one device and click on the Bluetooth icon on the other one, to find the device and establish the connection.

The sample demonstrates the following, using the Bluetooth API:

  1. Setting up Bluetooth
  2. Scanning for other Bluetooth devices
  3. Querying the local Bluetooth adapter for paired Bluetooth devices
  4. Establishing RFCOMM channels/sockets
  5. Connecting to a remote device
  6. Transfering data over Bluetooth


  • Android SDK 26
  • Android Build Tools v26.0.1
  • Android Support Repository


Screenshot Screenshot Screenshot

Getting Started

This sample uses the Gradle build system. To build this project, use the "gradlew build" command or use "Import Project" in Android Studio.


If you've found an error in this sample, please file an issue:

Patches are encouraged, and may be submitted by forking this project and submitting a pull request through GitHub. Please see for more details.


Copyright 2017 The Android Open Source Project, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

compile ""

compile ""

compile ""

compile ""

compileSdkVersion 26

minSdkVersion 11

targetSdkVersion 26


versionCode 1

versionName 1.0


  • android.permission.BLUETOOTH_ADMIN
  • android.permission.BLUETOOTH


A simple launcher activity containing a summary sample description, sample log and a custom {@link} which can display a view.

For devices with displays with a width of 720dp or greater, the sample log is always visible, on other devices it's visibility is controlled by an item on the Action Bar.

Create a chain of targets that will receive log data


This Activity appears as a dialog. It lists any paired devices and devices detected in the area after discovery. When a device is chosen by the user, the MAC address of the device is sent back to the parent Activity in the result Intent.

Tag for Log

Return Intent extra

Member fields

Newly discovered devices

Start device discover with the BluetoothAdapter

The on-click listener for all devices in the ListViews

The BroadcastReceiver that listens for discovered devices and changes the title when discovery is finished