expo-ble模块测试demo

ble/services/FileTransferService.ts

@@ -0,0 +1,51 @@
+import { BleProtocolService } from './BleProtocolService';
+import { COMMAND_TYPES } from '../protocol/Constants';
+
+
+export class FileTransferService {
+    private static instance: FileTransferService;
+    private protocol = BleProtocolService.getInstance();
+    
+    private constructor() {}
+
+    public static getInstance(): FileTransferService {
+        if (!FileTransferService.instance) {
+            FileTransferService.instance = new FileTransferService();
+        }
+        return FileTransferService.instance;
+    }
+
+    public async transferFile(deviceId: string, filePath: string, type: number, onProgress?: (progress: number) => void): Promise<void> {
+        try {
+            const response = await fetch(filePath);
+            if (!response.ok) {
+                throw new Error(`Failed to load file: ${response.statusText}`);
+            }
+            const blob = await response.blob();
+            
+            const reader = new FileReader();
+            const arrayBuffer = await new Promise<ArrayBuffer>((resolve, reject) => {
+                reader.onload = () => resolve(reader.result as ArrayBuffer);
+                reader.onerror = reject;
+                reader.readAsArrayBuffer(blob);
+            });
+            
+            await this.protocol.send(deviceId, type, arrayBuffer, onProgress);
+        } catch (e) {
+            console.error("File transfer failed", e);
+            throw e;
+        }
+    }
+    
+    public async transferOta(deviceId: string, filePath: string) {
+        return this.transferFile(deviceId, filePath, COMMAND_TYPES.OTA_PACKAGE);
+    }
+
+    public async transferBootAnimation(deviceId: string, filePath: string) {
+        return this.transferFile(deviceId, filePath, COMMAND_TYPES.TRANSFER_BOOT_ANIMATION);
+    }
+
+    public async transferWatchfaceStyle(deviceId: string, filePath: string) {
+        return this.transferFile(deviceId, filePath, COMMAND_TYPES.TRANSFER_AVI_VIDEO);
+    }
+}