Blelib

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Blelib is an Android-side Bluetooth Low Energy library that contains many of the features you need to interact with BLE peripherals.

Features

Support basic functions such as scanning, connecting, reading, writing, and notification with peripheral devices
Support custom scan
Support custom connection timeout
Supports connection of specified symbol rate PHY (Physical Layer) (PHY_LE_1M_MASK, PHY_LE_2M_MASK, PHY_LE_CODED_MASK)
Support setting connection priority
Support for setting the maximum transmission unit (MTU)
Support log switch

Set Up

Gradle

// Add in the build.gradle file of your project's Project level
repositories {
  jcenter()
}

// Add the following dependencies to the build.gradle file
// at your project's Module level
dependencies {
    implementation 'cc.noharry.blelib:blelib:0.1.0'
}

Maven

<dependency>
  <groupId>cc.noharry.blelib</groupId>
  <artifactId>blelib</artifactId>
  <version>0.1.0</version>
  <type>pom</type>
</dependency>

Permission

<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

The third permission in Android API 23 and above requires Request permission at runtime

Note: This library requires java1.8 version support

// Configure the following properties in the build.gradle file
// under your project's Module level.
android {
compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
  }

How to use

1.Scan

Set scan rules

method	description
setUUID(UUID[] uuid)	Filter out devices with input UUIDs in the AdvData
setDeviceName(String[] deviceName,boolean fuzzzy)	Filter out the device with the input device name. The second parameter is true to indicate that the device name contains the name passed in.
setDeviceMac(String[] deviceMac)	Filter out the device with the input MAC address, for example, 11:22:33:44:55:66
setScanTime(long scanTime)	Set the scan duration in milliseconds; if you do not call this method or pass 0, it will enter continuous scan mode.

BleScanConfig scanConfig = new Builder()
       .setDeviceName(new String[]{Name}, isFuzzy)
       .setDeviceMac(new String[]{Mac})
       .setUUID(new UUID[]{UUID.fromString(uuid)})
       .setScanTime(scanTime)
       .build();

Start scanning

//Scan result callback
BleScanCallback mBleScanCallback = new BleScanCallback() {
      @Override
      public void onScanStarted(boolean isStartSuccess) {
        //Start scanning
      }

      @Override
      public void onFoundDevice(BleDevice bleDevice) {
        //Discover the device, this callback will continuously call back
        //the discovered device during the scanning process,
        // which will appear duplicate devices
        //Therefore, the user needs to filter according to their usage.
      }

      @Override
      public void onScanCompleted(List<BleDevice> deviceList) {
        //Scan completed
        //Callback will occur when the scan time ends
        //or when stopScan() is called actively

        //The device that is recalled is all the devices scanned in the process,
        //and the duplicate device has been filtered.
      }
    };
BleAdmin
      .getINSTANCE(getApplication())
      .scan(scanConfig, mBleScanCallback);

Stop scanning

BleAdmin.getINSTANCE(getApplication()).stopScan();

2.connection

Connection callback

BleConnectCallback mBleConnectCallback = new BleConnectCallback() {
      @Override
      public void onDeviceConnecting(BleDevice bleDevice) {

      }

      @Override
      public void onDeviceConnected(BleDevice bleDevice) {

      }

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

      }

      @Override
      public void onDeviceDisconnecting(BleDevice bleDevice) {

      }

      @Override
      public void onDeviceDisconnected(BleDevice bleDevice, int status) {

      }
    };

Start connecting

parameter	Required	description
BleDevice	true	Device to connect
isAutoConnect	false	Whether to use automatic connection, true: use automatic connection, the connection is slow; false: connect immediately
BaseBleConnectCallback	true	If you want to fully handle the connected callback yourself: BaseBleConnectCallback; if you just want to use it simply: BleConnectCallback
preferredPhy	false	Connection using the specified symbol rate PHY (Physical Layer) (PHY_LE_1M_MASK, PHY_LE_2M_MASK, PHY_LE_CODED_MASK)
timeOut	false	Connection timeout in milliseconds

BleAdmin
          .getINSTANCE(getApplication())
          .connect(bleDevice
              , false
              , mBleConnectCallback
              ,timeOut);

Disconnect

BleAdmin
        .getINSTANCE(getApplication())
        .disconnect(bleDevice);

3.Read, write, notify, etc.

Because Android's operations on reading, writing, etc. of BLE devices need to be performed after the previous task is completed, the following tasks will be executed in order after they are created and added to the task queue.

3.1 Read

Create a read task

parameter	Required	description
bleDevice	true	Read task execution device
bluetoothGattCharacteristic	true	Characteristic to read
bluetoothGattDescriptor	true	Descriptor to read

ReadTask task = Task.newReadTask(bleDevice
, characteristic)
    .with(mReadCallback);

enqueue the task

  BleAdmin.getINSTANCE(getApplication()).addTask(task);

Result callback

ReadCallback mReadCallback = new ReadCallback() {
      @Override
      public void onDataRecived(BleDevice bleDevice, Data data) {
        //Readback of the data
      }

      @Override
      public void onOperationSuccess(BleDevice bleDevice) {
        //Successful operation
      }

      @Override
      public void onFail(BleDevice bleDevice, int statuCode, String message) {
        //Failure callback
      }

      @Override
      public void onComplete(BleDevice bleDevice) {
        //Complete callback
      }
    };

3.2 Write

Create a data object that needs to be written

method	description
setValue(byte[] value)	Set the data to be written
setValue(byte[] value,boolean isAutoSplit)	Set the data to be written, and if the data length is greater than the MTU value, whether it is automatically subcontracted, the default is to send 20 bytes per packet.
setValue(List< byte[] > value)	If you want to subcontract yourself, you can call this method.
setMTUSize(int packSize)	If you have requested other MTU values, this method can change the size of the data sent per packet when auto-packing

WriteData writeData=new WriteData();
    writeData.setValue(data,true);

Create a write task

parameter	Required	description
bleDevice	true	Devices that need to write data
characteristic	true	Characteristics that need to be written
bluetoothGattDescriptor	true	Descriptor of the data to be written
data	true	Data to be written

WriteTask task = Task.newWriteTask(bleDevice, characteristic, writeData)
    .with(mWriteCallback);

enqueue the task

BleAdmin.getINSTANCE(getApplication()).addTask(task);

Result callback

WriteCallback mWriteCallback = new WriteCallback() {
      @Override
      public void onDataSent(BleDevice bleDevice, Data data, int totalPackSize,
          int remainPackSize) {
              //bleDevice:Target device
              //data:Written data
              //totalPackSize：The total number of packets sent by this task
              //remainPackSize:Current remaining number of packages
      }

      @Override
      public void onOperationSuccess(BleDevice bleDevice) {

      }

      @Override
      public void onFail(BleDevice bleDevice, int statuCode, String message) {

      }

      @Override
      public void onComplete(BleDevice bleDevice) {

      }
    };

3.3 Notifications

Create a notification task

//Open notification
WriteTask enableTask = Task
.newEnableNotificationsTask(bleDevice, characteristic)
.with(mDataChangeCallback);

//Close notification
WriteTask disableTask = Task
.newDisableNotificationsTask(bleDevice, characteristic)
.with(mDataChangeCallback);

enqueue the task

BleAdmin.getINSTANCE(getApplication()).addTask(task);

Result callback

DataChangeCallback mDataChangeCallback = new DataChangeCallback() {
      @Override
      public void onDataChange(BleDevice bleDevice, Data data) {
        //This method will be called back when the notification is received
      }

      @Override
      public void onOperationSuccess(BleDevice bleDevice) {

      }

      @Override
      public void onFail(BleDevice bleDevice, int statuCode, String message) {

      }

      @Override
      public void onComplete(BleDevice bleDevice) {

      }
    };

3.4 Change the maximum transmission unit(MTU)

Create task

MtuTask mtuTask = Task
.newMtuTask(bleDevice, mtu)
.with(mMtuCallback);

enqueue the task

BleAdmin.getINSTANCE(getApplication()).addTask(task);

Result callback

MtuCallback mMtuCallback = new MtuCallback() {
      @Override
      public void onMtuChanged(BleDevice bleDevice, int mtu) {
          //This method will be called back after the MTU is successfully modified
      }

      @Override
      public void onOperationSuccess(BleDevice bleDevice) {

      }

      @Override
      public void onFail(BleDevice bleDevice, int statuCode, String message) {

      }

      @Override
      public void onComplete(BleDevice bleDevice) {

      }
    };

3.5 Change connection priority

Create task

ConnectionPriorityTask task = Task
.newConnectionPriorityTask(bleDevice, connectionPriority)
.with(mPriorityCallback);

enqueue the task

BleAdmin.getINSTANCE(getApplication()).addTask(task);

Result callback

ConnectionPriorityCallback priorityCallback = new ConnectionPriorityCallback() {
      @Override
      public void onConnectionUpdated(BleDevice bleDevice, int interval, int latency,
          int timeout, int status) {
        //This callback will only take effect in Android O and above.
      }

      @Override
      public void onOperationSuccess(BleDevice bleDevice) {

      }

      @Override
      public void onFail(BleDevice bleDevice, int statuCode, String message) {

      }

      @Override
      public void onComplete(BleDevice bleDevice) {

      }
    };

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