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Jasonchenlijian logoFastBle

Android Bluetooth Low Energy (BLE) Fast Development Framework. It uses simple ways to filter, scan, connect, read ,write, notify, readRssi, setMTU, and multiConnection.

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Top Related Projects

dariuszseweryn's avatar

RxAndroidBle

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An Android Bluetooth Low Energy (BLE) Library with RxJava3 interface

NordicSemiconductor's avatar

Android-BLE-Library

2,059

A library that makes working with Bluetooth LE on Android a pleasure. Seriously.

Quick Overview

FastBle is an Android Bluetooth Low Energy (BLE) library designed to simplify BLE operations. It provides an easy-to-use interface for scanning, connecting, and communicating with BLE devices, making it ideal for developers working on Android apps that require BLE functionality.

Pros

  • Simple and intuitive API for BLE operations
  • Supports multiple simultaneous connections
  • Includes automatic reconnection and error handling
  • Well-documented with clear examples

Cons

  • Limited to Android platform
  • May not support all advanced BLE features
  • Requires careful management of device connections to avoid resource issues
  • Some users report occasional stability issues with certain devices

Code Examples

Scanning for BLE devices:

BleManager.getInstance().scan(new BleScanCallback() {
    @Override
    public void onScanStarted(boolean success) {
        // Scan started
    }

    @Override
    public void onScanning(BleDevice bleDevice) {
        // Device found
    }

    @Override
    public void onScanFinished(List<BleDevice> scanResultList) {
        // Scan finished
    }
});

Connecting to a BLE device:

BleManager.getInstance().connect(bleDevice, new BleGattCallback() {
    @Override
    public void onStartConnect() {
        // Connection attempt started
    }

    @Override
    public void onConnectFail(BleDevice bleDevice, BleException exception) {
        // Connection failed
    }

    @Override
    public void onConnectSuccess(BleDevice bleDevice, BluetoothGatt gatt, int status) {
        // Connection successful
    }
});

Reading characteristic data:

BleManager.getInstance().read(
    bleDevice,
    serviceUUID,
    characteristicUUID,
    new BleReadCallback() {
        @Override
        public void onReadSuccess(byte[] data) {
            // Data read successfully
        }

        @Override
        public void onReadFailure(BleException exception) {
            // Read operation failed
        }
    }
);

Getting Started

  1. Add the FastBle dependency to your build.gradle file:
dependencies {
    implementation 'com.clj.fastble:FastBleLib:2.3.4'
}
  1. Initialize BleManager in your Application class:
public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        BleManager.getInstance().init(this);
    }
}
  1. Add necessary permissions to your AndroidManifest.xml:
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
  1. Start using FastBle in your activities or fragments to scan, connect, and communicate with BLE devices.

Competitor Comparisons

dariuszseweryn logo

RxAndroidBle

3,454

An Android Bluetooth Low Energy (BLE) Library with RxJava3 interface

Pros of RxAndroidBle

  • Built on RxJava, providing powerful reactive programming capabilities
  • Robust error handling and automatic retry mechanisms
  • Extensive documentation and community support

Cons of RxAndroidBle

  • Steeper learning curve due to RxJava integration
  • Larger library size compared to FastBle
  • May be overkill for simple BLE applications

Code Comparison

RxAndroidBle:

rxBleClient.scanBleDevices()
    .subscribe { scanResult ->
        // Handle scan result
    }

FastBle:

BleScanRuleConfig scanRuleConfig = new BleScanRuleConfig.Builder()
    .build();
BleManager.getInstance().initScanRule(scanRuleConfig);
BleManager.getInstance().scan(new BleScanCallback() {
    @Override
    public void onScanStarted(boolean success) {
        // Scan started
    }
    @Override
    public void onScanning(BleDevice bleDevice) {
        // Handle scan result
    }
});

RxAndroidBle offers a more concise and reactive approach to BLE operations, while FastBle provides a more traditional callback-based API. RxAndroidBle's reactive nature allows for easier composition of complex BLE operations, but may require more setup and understanding of reactive programming concepts. FastBle's simpler API might be more approachable for developers new to BLE or those working on less complex projects.

NordicSemiconductor logo

Android-BLE-Library

2,059

A library that makes working with Bluetooth LE on Android a pleasure. Seriously.

Pros of Android-BLE-Library

  • More comprehensive documentation and examples
  • Better support for advanced BLE features like GATT operations and bonding
  • Actively maintained by Nordic Semiconductor, a leading BLE chip manufacturer

Cons of Android-BLE-Library

  • Steeper learning curve due to more complex API
  • Larger library size, which may impact app size
  • Primarily optimized for Nordic Semiconductor devices

Code Comparison

Android-BLE-Library:

val bleManager = BleManager.getInstance()
bleManager.connect(device)
    .retry(3, 100)
    .useAutoConnect(false)
    .timeout(30000)
    .done { /* Handle connection */ }
    .fail { /* Handle failure */ }

FastBle:

BleManager.getInstance().connect(device, new BleGattCallback() {
    @Override
    public void onConnectSuccess(BleDevice bleDevice, BluetoothGatt gatt, int status) {
        // Handle connection
    }
    @Override
    public void onConnectFail(BleDevice bleDevice, Exception exception) {
        // Handle failure
    }
});

The Android-BLE-Library offers a more flexible and feature-rich API, while FastBle provides a simpler, more straightforward approach to BLE operations. The choice between the two depends on the specific requirements of your project and the level of BLE functionality needed.

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README

效果图

Thanks to the logo designed by anharismail

FastBle

Android Bluetooth Low Energy

  • Filtering, scanning, linking, reading, writing, notification subscription and cancellation in a simple way.
  • Supports acquiring signal strength and setting the maximum transmission unit.
  • Support custom scan rules
  • Support multi device connections
  • Support reconnection
  • Support configuration timeout for conncet or operation

Preview

Preview_1 Preview_2 Preview_3 Preview_4

APK

If you want to quickly preview all the functions, you can download APK as a test tool directly.

FastBLE.apk

Gradle

  • Setp1: Add it in your root build.gradle at the end of repositories

      allprojects {
      repositories {
          ...
          maven { url 'https://jitpack.io' }
      }
  }

  • Step2: Add the dependency

      dependencies {
      implementation 'com.github.Jasonchenlijian:FastBle:2.4.0'
  }

Jar

FastBLE-2.4.0.jar

Wiki

中文文档

Android BLE开发详解和FastBle源码解析

Usage

  • Init

      BleManager.getInstance().init(getApplication());

  • Determine whether the current Android system supports BLE

      boolean isSupportBle()

  • Open or close Bluetooth

      void enableBluetooth()
  void disableBluetooth()

  • Initialization configuration

      BleManager.getInstance()
          .enableLog(true)
          .setReConnectCount(1, 5000)
          .setSplitWriteNum(20)
          .setConnectOverTime(10000)
          .setOperateTimeout(5000);

  • Configuration scan rules

    void initScanRule(BleScanRuleConfig scanRuleConfig)

      BleScanRuleConfig scanRuleConfig = new BleScanRuleConfig.Builder()
          .setServiceUuids(serviceUuids)
          .setDeviceName(true, names)
          .setDeviceMac(mac)
          .setAutoConnect(isAutoConnect)
          .setScanTimeOut(10000)
          .build();
  BleManager.getInstance().initScanRule(scanRuleConfig);

    Tips：

    • Before scanning the device, scan rules can be configured to filter out the equipment matching the program.
    • What is not configured is the default parameter

  • Scan

    void scan(BleScanCallback callback)

      BleManager.getInstance().scan(new BleScanCallback() {
      @Override
      public void onScanStarted(boolean success) {

      }

      @Override
      public void onScanning(BleDevice bleDevice) {

      }

      @Override
      public void onScanFinished(List<BleDevice> scanResultList) {

      }
  });

    Tips:

    • The scanning and filtering process is carried out in the worker thread, so it will not affect the UI operation of the main thread. Eventually, every callback result will return to the main thread.。

  • Connect with device

    BluetoothGatt connect(BleDevice bleDevice, BleGattCallback bleGattCallback)

      BleManager.getInstance().connect(bleDevice, new BleGattCallback() {
      @Override
      public void onStartConnect() {

      }

      @Override
      public void onConnectFail(BleDevice bleDevice, BleException exception) {

      }

      @Override
      public void onConnectSuccess(BleDevice bleDevice, BluetoothGatt gatt, int status) {

      }

      @Override
      public void onDisConnected(boolean isActiveDisConnected, BleDevice bleDevice, BluetoothGatt gatt, int status) {

      }
  });

    Tips:

    • On some types of phones, connectGatt must be effective on the main thread. It is very recommended that the connection process be placed in the main thread.
    • After connection failure, reconnect: the framework contains reconnection mechanism after connection failure, which can configure reconnection times and intervals. Of course, you can also call the connect method in onConnectFail callback automatically.
    • The connection is disconnected and reconnected: you can call the connect method again in the onDisConnected callback method.
    • In order to ensure the success rate of reconnection, it is recommended to reconnect after a period of interval.
    • When some models fail, they will be unable to scan devices for a short time. They can be connected directly through device objects or devices MAC without scanning.

  • Connect with Mac

    BluetoothGatt connect(String mac, BleGattCallback bleGattCallback)

      BleManager.getInstance().connect(mac, new BleGattCallback() {
      @Override
      public void onStartConnect() {

      }

      @Override
      public void onConnectFail(BleDevice bleDevice, BleException exception) {

      }

      @Override
      public void onConnectSuccess(BleDevice bleDevice, BluetoothGatt gatt, int status) {

      }

      @Override
      public void onDisConnected(boolean isActiveDisConnected, BleDevice bleDevice, BluetoothGatt gatt, int status) {

      }
  });

    Tips:

    • This method can attempt to connect directly to the BLE device around the Mac without scanning.
    • In many usage scenarios, I suggest that APP save the Mac of the user's customary device, then use this method to connect, which will greatly improve the connection efficiency.

  • Scan and connect

    After scanning the first equipment that meets the scanning rules, it will stop scanning and connect to the device.

    void scanAndConnect(BleScanAndConnectCallback callback)

      BleManager.getInstance().scanAndConnect(new BleScanAndConnectCallback() {
      @Override
      public void onScanStarted(boolean success) {

      }

      @Override
      public void onScanFinished(BleDevice scanResult) {

      }

      @Override
      public void onStartConnect() {

      }

      @Override
      public void onConnectFail(BleDevice bleDevice,BleException exception) {

      }

      @Override
      public void onConnectSuccess(BleDevice bleDevice, BluetoothGatt gatt, int status) {

      }

      @Override
      public void onDisConnected(boolean isActiveDisConnected, BleDevice device, BluetoothGatt gatt, int status) {

      }
  });

  • Cancel scan

    void cancelScan()

      BleManager.getInstance().cancelScan();

    Tips:

    • If this method is called, if it is still in the scan state, it will end immediately, and callback the onScanFinished method.

  • Notify

    void notify(BleDevice bleDevice, String uuid_service, String uuid_notify, BleNotifyCallback callback) void notify(BleDevice bleDevice, String uuid_service, String uuid_notify, boolean useCharacteristicDescriptor, BleNotifyCallback callback)

      BleManager.getInstance().notify(
          bleDevice,
          uuid_service,
          uuid_characteristic_notify,
          new BleNotifyCallback() {
              @Override
              public void onNotifySuccess() {

              }

              @Override
              public void onNotifyFailure(BleException exception) {

              }

              @Override
              public void onCharacteristicChanged(byte[] data) {

              }
          });

  • Stop Notify

    boolean stopNotify(BleDevice bleDevice, String uuid_service, String uuid_notify) boolean stopNotify(BleDevice bleDevice, String uuid_service, String uuid_notify, boolean useCharacteristicDescriptor)

      BleManager.getInstance().stopNotify(uuid_service, uuid_characteristic_notify);

  • Indicate

    void indicate(BleDevice bleDevice, String uuid_service, String uuid_indicate, BleIndicateCallback callback) void indicate(BleDevice bleDevice, String uuid_service, String uuid_indicate, boolean useCharacteristicDescriptor, BleIndicateCallback callback)

      BleManager.getInstance().indicate(
          bleDevice,
          uuid_service,
          uuid_characteristic_indicate,
          new BleIndicateCallback() {
              @Override
              public void onIndicateSuccess() {

              }

              @Override
              public void onIndicateFailure(BleException exception) {

              }

              @Override
              public void onCharacteristicChanged(byte[] data) {

              }
          });

  • Stop Indicate

    boolean stopIndicate(BleDevice bleDevice, String uuid_service, String uuid_indicate) boolean stopIndicate(BleDevice bleDevice, String uuid_service, String uuid_indicate, boolean useCharacteristicDescriptor)

      BleManager.getInstance().stopIndicate(uuid_service, uuid_characteristic_indicate);

  • Write

    void write(BleDevice bleDevice, String uuid_service, String uuid_write, byte[] data, BleWriteCallback callback) void write(BleDevice bleDevice, String uuid_service, String uuid_write, byte[] data, boolean split, BleWriteCallback callback) void write(BleDevice bleDevice, String uuid_service, String uuid_write, byte[] data, boolean split, boolean sendNextWhenLastSuccess, long intervalBetweenTwoPackage, BleWriteCallback callback)

      BleManager.getInstance().write(
          bleDevice,
          uuid_service,
          uuid_characteristic_write,
          data,
          new BleWriteCallback() {
              @Override
              public void onWriteSuccess(int current, int total, byte[] justWrite) {

              }

              @Override
              public void onWriteFailure(BleException exception) {

              }
          });

    Tips:

    • Without expanding MTU and expanding MTU's ineffectiveness, subcontracting is required when long data with more than 20 bytes are to be sent. The parameter boolean split indicates whether to use packet delivery; the write method without the boolean split parameter is subcontracted to the data by more than 20 bytes by default.
    • On the onWriteSuccess callback method: current represents the number of packets that are currently sent, and total represents the total packet data this time, and justWrite represents the successful packet that has just been sent.

  • Read

    void read(BleDevice bleDevice, String uuid_service, String uuid_read, BleReadCallback callback)

      BleManager.getInstance().read(
          bleDevice,
          uuid_service,
          uuid_characteristic_read,
          new BleReadCallback() {
              @Override
              public void onReadSuccess(byte[] data) {

              }

              @Override
              public void onReadFailure(BleException exception) {

              }
          });

  • Get Rssi

    void readRssi(BleDevice bleDevice, BleRssiCallback callback)

      BleManager.getInstance().readRssi(
          bleDevice,
          new BleRssiCallback() {

              @Override
              public void onRssiFailure(BleException exception) {

              }

              @Override
              public void onRssiSuccess(int rssi) {

              }
          });

    Tips：

    • Obtaining the signal strength of the device must be carried out after the device is connected.
    • Some devices may not be able to read Rssi, do not callback onRssiSuccess (), and callback onRssiFailure () because of timeout.

  • set Mtu

    void setMtu(BleDevice bleDevice, int mtu, BleMtuChangedCallback callback)

      BleManager.getInstance().setMtu(bleDevice, mtu, new BleMtuChangedCallback() {
      @Override
      public void onSetMTUFailure(BleException exception) {

      }

      @Override
      public void onMtuChanged(int mtu) {

      }
  });

    Tips：

    • Setting up MTU requires operation after the device is connected.
    • There is no such restriction in the Android Version (API-17 to API-20). Therefore, only the equipment above API21 will expand the demand for MTU.
    • The parameter MTU of the method is set to 23, and the maximum setting is 512.
    • Not every device supports the expansion of MTU, which requires both sides of the communication, that is to say, the need for the device hardware also supports the expansion of the MTU method. After calling this method, you can see through onMtuChanged (int MTU) how much the maximum transmission unit of the device is expanded to after the final setup. If the device does not support, no matter how many settings, the final MTU will be 23.

  • requestConnectionPriority

    boolean requestConnectionPriority(BleDevice bleDevice,int connectionPriority)

    Tips:

    • Request a specific connection priority. Must be one of{@link BluetoothGatt#CONNECTION_PRIORITY_BALANCED}, {@link BluetoothGatt#CONNECTION_PRIORITY_HIGH} or {@link BluetoothGatt#CONNECTION_PRIORITY_LOW_POWER}.

  • Converte BleDevice object

    BleDevice convertBleDevice(BluetoothDevice bluetoothDevice)

    BleDevice convertBleDevice(ScanResult scanResult)

    Tips：

    • The completed BleDevice object is still unconnected, if necessary, advanced connection.

  • Get all connected devices

    List<BleDevice> getAllConnectedDevice()

      BleManager.getInstance().getAllConnectedDevice();

  • Get a BluetoothGatt of a connected device

    BluetoothGatt getBluetoothGatt(BleDevice bleDevice)

  • Get all Service of a connected device

    List<BluetoothGattService> getBluetoothGattServices(BleDevice bleDevice)

  • Get all the Characteristic of a Service

    List<BluetoothGattCharacteristic> getBluetoothGattCharacteristics(BluetoothGattService service)

  • Determine whether a device has been connected

    boolean isConnected(BleDevice bleDevice)

      BleManager.getInstance().isConnected(bleDevice);

    boolean isConnected(String mac)

      BleManager.getInstance().isConnected(mac);

  • Determine the current connection state of a device

    int getConnectState(BleDevice bleDevice)

      BleManager.getInstance().getConnectState(bleDevice);

  • Disconnect a device

    void disconnect(BleDevice bleDevice)

      BleManager.getInstance().disconnect(bleDevice);

  • Disconnect all devices

    void disconnectAllDevice()

      BleManager.getInstance().disconnectAllDevice();

  • Out of use, clean up resources

    void destroy()

      BleManager.getInstance().destroy();

  • HexUtil

    Data operation tool class

    String formatHexString(byte[] data, boolean addSpace)

    byte[] hexStringToBytes(String hexString)

    char[] encodeHex(byte[] data, boolean toLowerCase)

  • BleDevice

    BLE device object is the smallest unit object of scanning, connection and operation in this framework.

    String getName() Bluetooth broadcast name

    String getMac() Bluetooth MAC

    byte[] getScanRecord() Broadcast data

    int getRssi() Initial signal intensity

Contact

If you have problems and ideas to communicate with me, you can contact me in the following ways.

WeChat： chenlijian1216

Email： jasonchenlijian@gmail.com

License

   Copyright 2016 chenlijian

   Licensed 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

	   http://www.apache.org/licenses/LICENSE-2.0

   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.