From 051337ac1b40686cdade35d3da1e09859619a857 Mon Sep 17 00:00:00 2001
From: Developer <91611@user.local>
Date: Wed, 29 Apr 2026 13:32:26 +0800
Subject: [PATCH] =?UTF-8?q?fix(usb):=20=E8=A7=A3=E5=86=B3USB=E8=AE=BE?=
 =?UTF-8?q?=E5=A4=87=E6=9D=83=E9=99=90=E6=8B=92=E7=BB=9D=E6=97=B6=E7=9A=84?=
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- 添加了对null设备对象的检查
- 为空设备提供了合适的错误日志信息
- 防止了潜在的崩溃问题
---
 android/src/main/java/com/xiarui/zhiwen/UsbController.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/android/src/main/java/com/xiarui/zhiwen/UsbController.java b/android/src/main/java/com/xiarui/zhiwen/UsbController.java
index 12ada17..f79eefd 100644
--- a/android/src/main/java/com/xiarui/zhiwen/UsbController.java
+++ b/android/src/main/java/com/xiarui/zhiwen/UsbController.java
@@ -424,7 +424,11 @@ public class UsbController {
             new IPermissionListener() {
                 @Override
                 public void onPermissionDenied(UsbDevice d) {
-                    l("Permission denied on " + d.getDeviceId());
+                    if (d != null) {
+                        l("Permission denied on " + d.getDeviceId());
+                    } else {
+                        l("Permission denied (device unavailable)");
+                    }
                 }
             });