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@ -140,6 +140,21 @@ object BleService { |
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// 初始化状态 |
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private var isInitialized = false |
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/** |
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* 检查是否有蓝牙扫描权限 |
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*/ |
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private fun hasBluetoothScanPermission(): Boolean { |
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return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) { |
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// Android 12+ 需要 BLUETOOTH_SCAN 权限 |
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context.checkSelfPermission(Manifest.permission.BLUETOOTH_SCAN) == |
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android.content.pm.PackageManager.PERMISSION_GRANTED |
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} else { |
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// Android 12 以下使用 ACCESS_FINE_LOCATION 权限 |
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context.checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) == |
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android.content.pm.PackageManager.PERMISSION_GRANTED |
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} |
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} |
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// 音频数据统计相关变量 |
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private var bytesReceivedInCurrentSecond = 0 |
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@ -280,18 +295,22 @@ object BleService { |
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/** |
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* 开始主动扫描BLE设备 |
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* @param uuids 要扫描的服务UUID列表 |
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* @param timeout 扫描超时时间（毫秒） |
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* @return 是否成功开始扫描 |
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*/ |
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fun startScan(uuids: List<String>, timeout: Long = 15000): Boolean { |
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// Log.i(TAG, "liwei---------startScan 1 $deviceName") |
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if (!isInitialized) { |
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Log.e(TAG, "BLE服务未初始化") |
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return false |
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} |
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// Log.i(TAG, "liwei---------startScan 2") |
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// 获取一个局部引用，避免并发访问问题 |
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// val scanner = bluetoothLeScanner ?: return false |
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// 检查蓝牙扫描权限 |
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if (!hasBluetoothScanPermission()) { |
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Log.e(TAG, "开始扫描失败: 缺少 BLUETOOTH_SCAN 权限") |
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return false |
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} |
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// 💡 每次都重新取最新实例 |
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val scanner = bluetoothLeScanner ?: run { |
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Log.e(TAG, "bluetoothLeScanner == null，尝试重启蓝牙") |
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@ -299,58 +318,65 @@ object BleService { |
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return false |
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} |
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// Log.i(TAG, "liwei---------startScan 3") |
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if (isScanning) return false |
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// Log.i(TAG, "liwei---------startScan 4") |
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Log.i(TAG, "开始主动扫描BLE设备...") |
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scanResults.clear() |
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// Log.i(TAG, "liwei---------startScan 5") |
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val filter = ScanFilter.Builder() |
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// .setServiceUuid(ParcelUuid(BleConst.PRIMARY_SERVICE_UUID)) |
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// .setServiceUuid(ParcelUuid(java.util.UUID.fromString("00000201-0000-1000-8000-00805f9b34fb"))) |
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.build() |
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// val filters = uuids.mapNotNull { uuidStr -> |
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// try { |
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// // 清理UUID字符串，移除非十六进制字符 |
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// val cleanUuidStr = uuidStr.replace("[^0-9A-Fa-f]".toRegex(), "") |
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// |
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// // 验证清理后的字符串长度（应该是4位十六进制字符） |
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// if (cleanUuidStr.length != 4) { |
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// Log.w(TAG, "无效的UUID格式: $uuidStr，清理后: $cleanUuidStr，长度: ${cleanUuidStr.length}") |
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// return@mapNotNull null |
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// } |
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// |
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// val fullUuid = "0000$cleanUuidStr-0000-1000-8000-00805f9b34fb" |
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// Log.d(TAG, "扫描uuid: $fullUuid") |
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// |
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// ScanFilter.Builder() |
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// .setServiceUuid(ParcelUuid(UUID.fromString(fullUuid))) |
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// .build() |
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// } catch (e: IllegalArgumentException) { |
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// Log.e(TAG, "构造UUID失败: $uuidStr", e) |
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// null |
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// } |
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// } |
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// 构建扫描过滤器 - 参考 registerBackgroundScan 的实现 |
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val filters = mutableListOf<ScanFilter>() |
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// 如果提供了额外的UUID，也添加到过滤器中 |
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uuids.forEach { uuidStr -> |
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try { |
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val uuid = when { |
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uuidStr.length == 4 -> { |
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// 短UUID，转换为完整UUID |
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val fullUuid = "0000$uuidStr-0000-1000-8000-00805f9b34fb" |
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UUID.fromString(fullUuid) |
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} |
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uuidStr.length == 36 -> { |
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// 完整UUID |
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UUID.fromString(uuidStr) |
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} |
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else -> { |
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Log.w(TAG, "无效的UUID格式: $uuidStr") |
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return@forEach |
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} |
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} |
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val filter = ScanFilter.Builder() |
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//.setServiceUuid(ParcelUuid(uuid)) |
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.build() |
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filters.add(filter) |
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Log.d(TAG, "添加扫描过滤器UUID: $uuid") |
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} catch (e: IllegalArgumentException) { |
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Log.e(TAG, "构造UUID失败: $uuidStr", e) |
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} |
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} |
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// 扫描设置 - 参考 registerBackgroundScan 的配置 |
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val settings = ScanSettings.Builder() |
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.setScanMode(ScanSettings.SCAN_MODE_LOW_POWER) |
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.setCallbackType(ScanSettings.CALLBACK_TYPE_ALL_MATCHES) // 推荐：不会触发权限问题 |
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.setCallbackType(ScanSettings.CALLBACK_TYPE_ALL_MATCHES) |
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.setReportDelay(0) |
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.build() |
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// Log.i(TAG, "liwei---------startScan 7") |
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try { |
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scanner.startScan(listOf(filter), settings, scanCallback) |
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// 使用过滤器列表进行扫描 |
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scanner.startScan(filters, settings, scanCallback) |
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isScanning = true |
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// Log.i(TAG, "liwei---------startScan 8") |
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// 设置扫描超时 |
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scanHandler.postDelayed({ |
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Log.d(TAG, "扫描超时，停止扫描") |
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stopScan() |
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}, timeout) |
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// Log.i(TAG, "liwei---------startScan 9") |
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Log.i(TAG, "已启动BLE扫描，过滤器数量: ${filters.size}") |
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return true |
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} catch (e: Exception) { |
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Log.e(TAG, "启动扫描失败: ${e.message}", e) |
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// Log.i(TAG, "liwei---------startScan 10") |
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isScanning = false |
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return false |
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} |
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lxm
1 year ago