- 蓝牙通信方式
- 经典蓝牙(Bluetooth Classic)通信:
- 经典蓝牙通信通常用于在较短的距离内传输大量数据,例如音频流、文件传输等。
- 在 Android 中,你可以使用 BluetoothAdapter 和 BluetoothSocket 类来建立经典蓝牙连接,并进行数据传输。
- 经典蓝牙通信通常需要进行配对和授权,以确保通信的安全性。
- 蓝牙低功耗(Bluetooth Low Energy,BLE)通信:
- BLE 通信适用于低功耗设备和周期性数据传输场景,例如健康监测、传感器数据采集等。
- 在 Android 中,BLE 通信通常使用 BluetoothLeScanner 和 BluetoothGatt 类来实现。
- BLE 通信不需要配对,通常以连接为基础,并且支持广播、订阅通知等特性。
- 经典蓝牙(Bluetooth Classic)通信:
权限适配参考
https://juejin.cn/post/7320169878644031488
https://www.cnblogs.com/fly263/p/16715525.html
https://blog.csdn.net/qq_17189617/article/details/135291784
流写数据
https://cloud.tencent.com.cn/developer/article/2310635
https://www.jb51.net/article/263206.htm
* 客户端设置
* 单击事件
* */
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String s = arrayAdapter.getItem(position);
String address = s.substring(s.indexOf(":") + 1).trim();//获取蓝牙IP
try {
if (bluetoothAdapter.isDiscovering()) {
bluetoothAdapter.cancelDiscovery();//若当前蓝牙被使用,则关闭重新启用
}
try {
if (device == null) {//若未连接,则获得远程设备
device = bluetoothAdapter.getRemoteDevice(address);
}
if (clientSocket == null) {
clientSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
clientSocket.connect();//连接蓝牙
os = clientSocket.getOutputStream();//客户端向服务端输出文本
}
} catch (IOException e) {
e.printStackTrace();
}
if (os != null) {
os.write("发送信息到其他设备".getBytes("utf-8"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
https://www.cnblogs.com/Free-Thinker/p/11507349.html
读写特征判断
-
判断服务是否有读或者写权限 用或运算
// 获取特征的 UUID val characteristicUUID = characteristic.uuid // 检查特征的属性 val properties = characteristic.properties // 判断特征是否可读写 if (properties and (BluetoothGattCharacteristic.PROPERTY_READ or BluetoothGattCharacteristic.PROPERTY_WRITE) > 0) { // 特征可读写,打印其 UUID LogUtils.e("Characteristic UUID", characteristicUUID.toString()) }
-
判断服务是否有 读写 通知权限 这边用与运算
@SuppressLint("MissingPermission") fun findGattService(gatt: BluetoothGatt?): BluetoothGattService? { var service: BluetoothGattService? = null if (gatt != null) { LogUtils.e("findGattService 当前设备: ${gatt.device.name}") val bgsList = gatt.services label@ for (gattService in bgsList) { val uuid = gattService!!.uuid.toString() if (gattService.type == BluetoothGattService.SERVICE_TYPE_PRIMARY) { } LogUtils.e(" gattService服务UUID $uuid ${gattService.type} ") for (characteristic in gattService.characteristics) { // 获取特征的 UUID val characteristicUUID = characteristic.uuid // 检查特征的属性 val properties = characteristic.properties // 判断特征是否可读写 if (properties and (BluetoothGattCharacteristic.PROPERTY_READ or BluetoothGattCharacteristic.PROPERTY_WRITE) > 0) { // 特征可读写,打印其 UUID LogUtils.e("Characteristic UUID", characteristicUUID.toString()) } var isRead = (characteristic.properties and BluetoothGattCharacteristic.PROPERTY_READ) > 0 var isWrite = (characteristic.properties and BluetoothGattCharacteristic.PROPERTY_WRITE) > 0 var isNotify = (characteristic.properties and BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0 if (isRead) { UUID_RECEIVE_CHARACTERISTIC = characteristic.uuid.toString() LogUtils.e("写特征 $UUID_RECEIVE_CHARACTERISTIC") } if (isWrite) { UUID_SEND_CHARACTERISTIC = characteristic.uuid.toString() LogUtils.e("读特征 $UUID_SEND_CHARACTERISTIC") } if (isNotify) { CLIENT_CHARACTERISTIC_CONFIG = characteristic.uuid.toString() LogUtils.e("通知特征 $CLIENT_CHARACTERISTIC_CONFIG") } if (isWrite and isWrite and isNotify) { UUID_GATT_SERVICE = gattService.uuid.toString() service = gattService break@label } } } } return service }
特征判断参考