该文档只说明一对多，蓝牙其余操作略过
需求
教练带七个学员训练，每个学员身上都有一套设备，该设备需要app通过ble控制
步骤
创建以下map，用来存储必要的信息
private Map mBluetoothGattMap = new ConcurrentHashMap<>(); //临时保存 BluetoothGatt
private Map mGattCharacteristicMap = new ConcurrentHashMap<>();// 临时保存蓝牙的特征值 Characteristic
private Map mGattCharacteristicNotifyMap = new ConcurrentHashMap<>();// 临时保存蓝牙的特征值 Characteristic
当蓝牙收到连接成功回调时(onConnectionStateChange)
private void onConnectStateSuccess(BluetoothGatt gatt){
BluetoothDevice device = gatt.getDevice();
mBluetoothGattMap.put(device.getAddress(), gatt);//把 BluetoothGatt 以 key-value 的形式临时保存起来
gatt.discoverServices();
}
当蓝牙收到连接失败回调时(onConnectionStateChange)
private void onConnectStateFailure(BluetoothGatt gatt){
String address = gatt.getDevice().getAddress();
mBluetoothGattMap.remove(address);
}
当服务被找到时(onServicesDiscovered)
private void onServiceDiscoveredSuccess() {
for (Map.Entry s : mBluetoothGattMap.entrySet()) {
BluetoothGatt curGatt = s.getValue();
BluetoothGattService bluetoothGattService = curGatt.getService(Constants.DeviceUUID.uuid);
if (bluetoothGattService != null) {
BluetoothGattCharacteristic bluetoothGattCharacteristic = bluetoothGattService.getCharacteristic(Constants.DeviceUUID.UUID_READ_WRITE);
BluetoothGattCharacteristic mCharacteristicNotify = bluetoothGattService.getCharacteristic(Constants.DeviceUUID.UUID_NOTIFY);
mGattCharacteristicMap.put(s.getKey(), bluetoothGattCharacteristic);
mGattCharacteristicNotifyMap.put(s.getKey(), mCharacteristicNotify);
BluetoothGattCharacteristic characteristic = mGattCharacteristicNotifyMap.get(s.getKey());
curGatt.setCharacteristicNotification(characteristic, true);
List descriptors = characteristic.getDescriptors();
for (BluetoothGattDescriptor dp : descriptors) {
dp.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE);
dp.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
curGatt.writeDescriptor(dp);
}
}
}
}
断开蓝牙
//取消蓝牙配对
public void disconnectBle(String bluetoothdeviceAddress) {
if (mBluetoothAdapter == null || TextUtils.isEmpty(bluetoothdeviceAddress)) {
return;
}
BluetoothGatt bluetoothGatt = getBleGattByAddress(bluetoothdeviceAddress);
if (bluetoothGatt != null && getAvailableBle() != null) {
bluetoothGatt.disconnect();
mBluetoothGattMap.remove(bluetoothdeviceAddress);
bluetoothGatt.close();
}
}
//通过地址返回当前蓝牙
public BluetoothGatt getBleGattByAddress(String address) {
for (Map.Entry s : mBluetoothGattMap.entrySet()) {
BluetoothGatt curGatt = s.getValue();
String key = s.getKey();
if (address.equals(key)) {
return curGatt;
}
}
return null;
}
写数据
//往设备里写数据
public boolean writeCharacteristic(final byte[] data, boolean needResponse) {
if (mBluetoothAdapter == null || mBluetoothGattMap.size() == 0 || data == null) {
return false;
}
boolean flag = false;
for (Map.Entry s : mBluetoothGattMap.entrySet()) {
final BluetoothGatt curGatt = s.getValue();
final BluetoothGattCharacteristic characteristic = mGattCharacteristicMap.get(s.getKey());
if (characteristic == null) {
return false;
}
characteristic.setValue(data);
if (!needResponse) {
characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE);
} else {
curGatt.setCharacteristicNotification(characteristic, true);
curGatt.readCharacteristic(characteristic);
}
flag = curGatt.writeCharacteristic(characteristic);
}
return flag;
}