Auto-Commit: 2026-08-18 20:54:11

modules/usb-camera/android/src/main/java/expo/modules/usbcamera/UsbCameraModule.kt

@@ -3,13 +3,31 @@ package expo.modules.usbcamera
 import expo.modules.kotlin.modules.Module
 import expo.modules.kotlin.modules.ModuleDefinition
 import expo.modules.kotlin.Promise
+import java.io.BufferedReader
+import java.io.InputStreamReader
 
 class UsbCameraModule : Module() {
   override fun definition() = ModuleDefinition {
     Name("UsbCamera")
 
+    AsyncFunction("getLogcat") { promise: Promise ->
+      try {
+        val process = Runtime.getRuntime().exec("logcat -d -v time -s UsbCameraView CameraClient")
+        val bufferedReader = BufferedReader(InputStreamReader(process.inputStream))
+        val log = java.lang.StringBuilder()
+        var line: String? = bufferedReader.readLine()
+        while (line != null) {
+          log.append(line).append("\n")
+          line = bufferedReader.readLine()
+        }
+        promise.resolve(log.toString())
+      } catch (e: Exception) {
+        promise.resolve("Error reading logcat: ${e.message}")
+      }
+    }
+
     View(UsbCameraView::class) {
-      Events("onCameraReady")
+      Events("onCameraReady", "onCameraError", "onCameraState")
 
       AsyncFunction("takePicture") { view: UsbCameraView, savePath: String, promise: Promise ->
         view.takePicture(savePath, promise)

modules/usb-camera/android/src/main/java/expo/modules/usbcamera/UsbCameraView.kt

@@ -12,9 +12,15 @@ import expo.modules.kotlin.views.ExpoView
 import expo.modules.kotlin.AppContext
 import expo.modules.kotlin.Promise
 
+import expo.modules.kotlin.viewevent.EventDispatcher
+
 class UsbCameraView(context: Context, appContext: AppContext) : ExpoView(context, appContext) {
     private val textureView: AspectRatioTextureView
     private var cameraClient: CameraClient? = null
+    
+    private val onCameraReady by EventDispatcher()
+    private val onCameraError by EventDispatcher()
+    private val onCameraState by EventDispatcher()
 
     init {
         textureView = AspectRatioTextureView(context)
@@ -89,8 +95,13 @@ class UsbCameraView(context: Context, appContext: AppContext) : ExpoView(context
     private fun startPreview() {
         try {
             cameraClient?.openCamera(textureView)
+            onCameraReady(mapOf("status" to "ready"))
         } catch (e: Exception) {
             e.printStackTrace()
+            appContext.currentActivity?.runOnUiThread {
+                android.util.Log.e("UsbCameraView", "startPreview error: ${e.message}")
+                onCameraError(mapOf("error" to (e.message ?: "Unknown error")))
+            }
         }
     }
 

modules/usb-camera/index.ts

@@ -1,8 +1,16 @@
-import { requireNativeViewManager } from 'expo-modules-core';
+import { requireNativeViewManager, requireNativeModule } from 'expo-modules-core';
 import * as React from 'react';
 import { ViewProps, Platform } from 'react-native';
 
 const viewName = 'UsbCamera';
+export const UsbCamera = requireNativeModule('UsbCamera');
+
+export async function getUsbCameraLogcat(): Promise<string> {
+  if (UsbCamera && UsbCamera.getLogcat) {
+    return await UsbCamera.getLogcat();
+  }
+  return 'Not supported';
+}
 
 export interface UsbCameraViewProps extends ViewProps {
   // Add props here if we decide to pass them from JS