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+package com.bearya.robot.bluetoothlowenergy
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+
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+import android.annotation.SuppressLint
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+import android.bluetooth.*
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+import android.bluetooth.le.AdvertiseCallback
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+import android.bluetooth.le.AdvertiseData
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+import android.bluetooth.le.AdvertiseSettings
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+import android.bluetooth.le.BluetoothLeAdvertiser
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+import android.content.BroadcastReceiver
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+import android.content.Context
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+import android.content.Intent
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+import android.content.IntentFilter
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+import android.content.pm.PackageManager
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+import android.icu.text.SimpleDateFormat
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+import android.os.Build
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+import android.os.Bundle
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+import android.os.Handler
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+import android.os.ParcelUuid
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+import android.view.Menu
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+import android.view.MenuItem
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+import androidx.appcompat.app.AppCompatActivity
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+import androidx.appcompat.widget.AppCompatTextView
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+import androidx.core.os.postDelayed
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+import androidx.core.widget.NestedScrollView
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+import java.util.*
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+
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+class MainActivity : AppCompatActivity() {
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+
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+ companion object {
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+ // 服务启动UUID
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+ private val UUID_SERVICE: UUID = UUID.fromString("7e87d2af-4781-4a48-a827-abfa6b322e47")
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+
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+ // 服务可写+通知 BluetoothGattCharacteristic UUID
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+ private val UUID_CHAR_WRITE_NOTIFY = UUID.fromString("a0de9f4b-4f42-4dd9-a655-7140b15159fe")
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+
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+ // 服务可读+通知 BluetoothGattCharacteristic UUID
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+// private val UUID_CHAR_READ_NOTIFY = UUID.fromString("a16156d4-9b8c-4a1e-a3d8-a699240d97fe")
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+ }
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+
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+ private var startBluetoothGattFlag = false
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+ private val bluetoothDevices: MutableList<BluetoothDevice> by lazy { mutableListOf() }
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+ private val mBluetoothLeAdvertiser: BluetoothLeAdvertiser? by lazy { BluetoothAdapter.getDefaultAdapter().bluetoothLeAdvertiser } // BLE广播
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+ private var mBluetoothGattServer: BluetoothGattServer? = null // BLE服务端
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+ private lateinit var textView: AppCompatTextView
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+ private lateinit var scrollView: NestedScrollView
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+ private val handler by lazy { Handler() }
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+ private val runnable: Runnable by lazy {
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+ Runnable { scrollView.fullScroll(NestedScrollView.FOCUS_DOWN) }
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+ }
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+ private var responseString: StringBuffer = StringBuffer()
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+
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+ // BLE广播Callback
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+ private val mAdvertiseCallback by lazy {
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+ object : AdvertiseCallback() {
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+ override fun onStartSuccess(settingsInEffect: AdvertiseSettings?) = logger("广播 : 添加启动成功")
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+ override fun onStartFailure(errorCode: Int) = logger("广播 : 添加启动失败 , 错误码 = $errorCode")
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+ }
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+ }
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+ private val sdf by lazy { SimpleDateFormat("HH : mm : ss", Locale.CHINA) }
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+ private val mBluetoothGattServerCallback by lazy {
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+ object : BluetoothGattServerCallback() {
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+ override fun onConnectionStateChange(device: BluetoothDevice?, status: Int, newState: Int) {
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+ logger(when (status) {
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+ 0 -> when (newState) {
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+ BluetoothGatt.STATE_CONNECTED -> device?.takeUnless { bluetoothDevices.contains(it) }?.also { bluetoothDevices.add(it) }?.let { "onConnectionStateChange : 与 [ ${it.name} ] 连接成功 , 等待接收解析数据。" }
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+ BluetoothGatt.STATE_DISCONNECTED -> device?.takeIf { bluetoothDevices.contains(it) }?.also { bluetoothDevices.remove(it) }?.let { "onConnectionStateChange : 与 [ ${it.name} ] 连接断开" }
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+ else -> "onConnectionStateChange : 与 [ ${device?.name} ] 正在发生连接断开变化中"
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+ }
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+ else -> device?.takeIf { bluetoothDevices.contains(it) }?.also { bluetoothDevices.remove(it) }?.let { "onConnectionStateChange : 与 [ ${it.name} ] 连接出错,错误码:$status" }
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+ })
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+ }
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+
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+ override fun onServiceAdded(status: Int, service: BluetoothGattService?) {
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+ logger("onServiceAdded : 添加服务 [ ${service?.uuid} ] ${if (status == 0) "成功" else "失败 , 错误码 : $status"} 。")
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+ }
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+
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+ override fun onCharacteristicReadRequest(device: BluetoothDevice?, requestId: Int, offset: Int, characteristic: BluetoothGattCharacteristic?) {
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+ val response = "CharacteristicReadResponse_${(Math.random() * 100).toInt()}" //模拟数据
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+ mBluetoothGattServer?.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, response.toByteArray()) // 响应客户端
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+ logger("onCharacteristicReadRequest : 客户端 [ ${device?.name} ] 读取Characteristic : $response")
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+ }
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+
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+ override fun onCharacteristicWriteRequest(device: BluetoothDevice?, requestId: Int, characteristic: BluetoothGattCharacteristic?, preparedWrite: Boolean, responseNeeded: Boolean, offset: Int, value: ByteArray?) {
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+
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+ mBluetoothGattServer?.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, value) // 响应客户端
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+
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+ if (value != null && value.isNotEmpty()) {
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+ if ((value[0].toInt().and(0xff) == 0xf8) && (value[value.size - 1].toInt().and(0xff) == 0xf9)) {
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+ // 首Byte == 0xf8 && 尾Byte == 0xf9 , 结束
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+ val characteristicByte = value.copyOfRange(3, value.size - 2).toString(Charsets.UTF_8)
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+ logger("onCharacteristicWriteRequest : 客户端 [ ${device?.name} ] 写入Characteristic : $characteristicByte")
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+
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+ mBluetoothGattServer?.notifyCharacteristicChanged(device, characteristic?.apply { setValue("SUCCESS") }, true)
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+ ?.takeIf { it }?.also { logger("onDescriptorWriteRequest: 通知客户端 [ ${device?.name} ] 改变Characteristic : SUCCESS") }
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+
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+ } else if ((value[0].toInt().and(0xff) == 0xf8) && (value[value.size - 1].toInt().and(0xff) != 0xf9)) {
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+ // 首Byte == 0xf8 && 尾Byte != 0xf9 , 继续
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+ responseString.append(value.copyOfRange(3, value.size).toString(Charsets.UTF_8))
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+ } else if ((value[0].toInt().and(0xff) != 0xf8) && (value[value.size - 1].toInt().and(0xff) == 0xf9)) {
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+ // 首Byte != 0xf8 && 尾Byte == 0xf9 , 结束
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+ if (value.size > 2) {
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+ responseString.append(value.copyOfRange(0, value.size - 2).toString(Charsets.UTF_8))
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+ } else if (value.size == 1) {
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+ responseString.deleteCharAt(responseString.length - 1)
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+ }
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+ logger("onCharacteristicWriteRequest : 客户端 [ ${device?.name} ] 写入Characteristic : $responseString")
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+
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+ mBluetoothGattServer?.notifyCharacteristicChanged(device, characteristic?.apply { setValue("SUCCESS") }, true)
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+ ?.takeIf { it }?.also { logger("onDescriptorWriteRequest: 通知客户端 [ ${device?.name} ] 改变Characteristic : SUCCESS") }
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+
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+ } else {
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+ // 首Byte != 0xf8 && 尾Byte != 0xf9 , 继续
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+ responseString.append(value.toString(Charsets.UTF_8))
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+ }
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+ }
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+
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+ }
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+
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+ override fun onDescriptorReadRequest(device: BluetoothDevice?, requestId: Int, offset: Int, descriptor: BluetoothGattDescriptor?) {
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+ val response = "DescriptorReadResponse_${(Math.random() * 100).toInt()}" //模拟数据
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+ mBluetoothGattServer?.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, response.toByteArray()) // 响应客户端
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+ logger("onDescriptorReadRequest : 客户端 [ ${device?.name} ] 读取Descriptor : $response")
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+ }
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+
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+ override fun onDescriptorWriteRequest(device: BluetoothDevice?, requestId: Int, descriptor: BluetoothGattDescriptor?, preparedWrite: Boolean, responseNeeded: Boolean, offset: Int, value: ByteArray?) {
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+ // 获取客户端发过来的数据
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+ val valueStr = value?.toString(Charsets.UTF_8)
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+ mBluetoothGattServer?.getService(UUID_SERVICE)?.getCharacteristic(UUID_CHAR_WRITE_NOTIFY)
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+ mBluetoothGattServer?.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, value) // 响应客户端
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+ logger("onDescriptorWriteRequest: 客户端 [ ${device?.name} ] 写入Descriptor : $valueStr")
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+ }
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+
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+ override fun onExecuteWrite(device: BluetoothDevice?, requestId: Int, execute: Boolean) = logger("onExecuteWrite : name = ${device?.name} , address = ${device?.address} , requestId = $requestId , exe = $execute")
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+
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+ override fun onNotificationSent(device: BluetoothDevice?, status: Int) = logger("onNotificationSent : name = ${device?.name} , address = ${device?.address} , status = $status")
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+
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+ override fun onMtuChanged(device: BluetoothDevice?, mtu: Int) = logger("onMtuChanged : name = ${device?.name} , address = ${device?.address} , mtu = $mtu")
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+
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+ }
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+
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+ }
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+
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+ @SuppressLint("HardwareIds")
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+ override fun onCreate(savedInstanceState: Bundle?) {
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+ super.onCreate(savedInstanceState)
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+ setContentView(R.layout.activity_main)
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+
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+ textView = findViewById(R.id.message)
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+ scrollView = findViewById(R.id.nested)
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+
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+ registerReceiver(object : BroadcastReceiver() {
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+ override fun onReceive(context: Context?, intent: Intent?) {
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+ when (intent?.action) {
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+ BluetoothAdapter.ACTION_STATE_CHANGED -> {
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+ when (BluetoothAdapter.getDefaultAdapter().state) {
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+ BluetoothAdapter.STATE_ON -> logger("蓝牙已经打开, 点击上方 '启动蓝牙连接服务' ")
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+ BluetoothAdapter.STATE_OFF -> startBluetoothGattFlag = false.also { logger("蓝牙已经关闭，点击打开蓝牙试试") }
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+ BluetoothAdapter.STATE_TURNING_OFF -> logger("蓝牙正在关闭")
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+ BluetoothAdapter.STATE_TURNING_ON -> logger("蓝牙正在打开")
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+ }
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+ }
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+ }
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+ }
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+ }, IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED))
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+
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+ if (packageManager.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
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+ BluetoothAdapter.getDefaultAdapter().apply {
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+ name = "BeiYa-${Build.SERIAL}".also { logger("本机支持BluetoothLowEnergy , 可搜索本机蓝牙设备名称 : $it") }
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+ }
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+ openBluetooth()
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+ } else {
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+ logger("本机不支持BluetoothLowEnergy")
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+ }
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+ }
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+
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+ private fun initBluetoothLowEnergy() {
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+ startBluetoothGattFlag = true
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+ logger("启动BluetoothLowEnergyService")
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+ // 广播设置
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+ val advertiseSettingsBuilder = AdvertiseSettings.Builder().apply {
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+ setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY) // 广播模式: 低功耗,平衡,低延迟
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+ setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH) // 发射功率级别: 极低,低,中,高
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+ setConnectable(true) // 能否连接,广播分为可连接广播和不可连接广播,必须要开启可连接的BLE广播,其它设备才能发现并连接BLE服务端
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+ }.build()
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+ // 广播数据
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+ val advertiseDataBuild = AdvertiseData.Builder().apply {
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+ setIncludeDeviceName(true) // 包含蓝牙名称
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+ setIncludeTxPowerLevel(true) // 包含发射功率级别
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+ }.build()
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+ // 扫描响应数据
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+ val advertiseResponseDataBuild = AdvertiseData.Builder().apply {
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+ addServiceUuid(ParcelUuid(UUID_SERVICE)) // 服务UUID
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+ }.build()
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+
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+ mBluetoothLeAdvertiser?.startAdvertising(advertiseSettingsBuilder, advertiseDataBuild, advertiseResponseDataBuild, mAdvertiseCallback)
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+
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+ val bluetoothGattService = BluetoothGattService(UUID_SERVICE, BluetoothGattService.SERVICE_TYPE_PRIMARY).apply {
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+ // 添加指定UUID的可写characteristic
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+ addCharacteristic(BluetoothGattCharacteristic(UUID_CHAR_WRITE_NOTIFY, BluetoothGattCharacteristic.PROPERTY_WRITE or BluetoothGattCharacteristic.PROPERTY_NOTIFY, BluetoothGattCharacteristic.PERMISSION_WRITE))
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+ }
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+ // 添加 可读+通知 characteristic
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+ mBluetoothGattServer = (getSystemService(Context.BLUETOOTH_SERVICE) as? BluetoothManager?)?.openGattServer(this, mBluetoothGattServerCallback)
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+ mBluetoothGattServer?.addService(bluetoothGattService)
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+ }
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+
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+ private fun logger(message: String? = "\n******************************************\n") {
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+ runOnUiThread {
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+ handler.removeCallbacks(runnable)
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+ textView.append("\n${sdf.format(Date())}\n【 $message 】\n")
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+ textView.append("\n=======================================================================\n")
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+ handler.postDelayed(runnable, 30)
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+ responseString.takeIf { it.isNotEmpty() }?.apply { delete(0, responseString.length) }
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+ }
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+ }
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+
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+ private fun openBluetooth() {
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+ if (packageManager.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
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+ if (!BluetoothAdapter.getDefaultAdapter().isEnabled) {
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+ logger("正在启动蓝牙,等候回应")
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+ BluetoothAdapter.getDefaultAdapter().enable()
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+ } else {
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+ logger("蓝牙已经打开, 点击上方 '启动蓝牙连接服务' ")
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+ }
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+ } else {
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+ logger("本机不支持BluetoothLowEnergy")
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+ }
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+ }
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+
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+ private fun stopBluetooth() {
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+ logger("BluetoothLowEnergyService 正在关闭Advertising,清除Services,释放Server")
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+
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+ mBluetoothLeAdvertiser?.stopAdvertising(mAdvertiseCallback)
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+ bluetoothDevices.takeIf { it.size > 0 }?.forEachIndexed { _, bluetoothDevice ->
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+ mBluetoothGattServer?.cancelConnection(bluetoothDevice)
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+ }
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+ mBluetoothGattServer?.clearServices()
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+ mBluetoothGattServer?.close()
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+ mBluetoothGattServer = null
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+
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+ logger("BluetoothLowEnergyService 结束关闭Advertising,清除Services,释放Server")
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+
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+ startBluetoothGattFlag = false
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+ }
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+
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+ override fun onCreateOptionsMenu(menu: Menu?): Boolean {
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+ menuInflater.inflate(R.menu.bluetooth_menu, menu)
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+ return super.onCreateOptionsMenu(menu)
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+ }
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+
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+ override fun onOptionsItemSelected(item: MenuItem): Boolean {
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+ when (item.itemId) {
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+ android.R.id.home -> finish()
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+ R.id.start_bluetooth_service -> {
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+ if (startBluetoothGattFlag) {
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+ logger("BluetoothLowEnergyService已经启动")
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+ } else {
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+ logger("5秒后启动BluetoothLowEnergyService")
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+ handler.postDelayed(5000) {
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+ initBluetoothLowEnergy()
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+ }
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+ }
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+ }
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+ R.id.stop_bluetooth_service -> {
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+ if (startBluetoothGattFlag) stopBluetooth()
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+ else logger("BluetoothLowEnergyService 已经关闭")
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+ }
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+ R.id.open_bluetooth -> openBluetooth()
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+ }
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+ return super.onOptionsItemSelected(item)
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+ }
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+
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+}
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infinite.likelins
4 years ago
