From 90cc8a62e05059319487692e8b0fc0435dd8817d Mon Sep 17 00:00:00 2001
From: jiangdongguo <765067602@qq.com>
Date: Sun, 12 Nov 2017 23:13:42 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E6=A3=80=E6=B5=8BUSB?=
 =?UTF-8?q?=E8=AE=BE=E5=A4=87=E5=88=97=E8=A1=A8?=
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---
 .../src/main/java/com/jiangdg/usbcamera/USBCameraManager.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libusbcamera/src/main/java/com/jiangdg/usbcamera/USBCameraManager.java b/libusbcamera/src/main/java/com/jiangdg/usbcamera/USBCameraManager.java
index d2aaa0f..8bc1d6f 100644
--- a/libusbcamera/src/main/java/com/jiangdg/usbcamera/USBCameraManager.java
+++ b/libusbcamera/src/main/java/com/jiangdg/usbcamera/USBCameraManager.java
@@ -176,7 +176,7 @@ public class USBCameraManager{
 
     public void restartUSBCamera(CameraViewInterface cameraView,final OnPreviewListener mPreviewListener){
         if(mCtrlBlock == null || cameraView == null)
-            new Throwable("mCtrlBlock or cameraView is null---jiangdongguo");
+           throw new NullPointerException("mCtrlBlock or cameraView is null,please connected to camera");
         // 创建Camera管理线程
         createUVCCamera(cameraView);
         // 创建Camera
@@ -253,7 +253,7 @@ public class USBCameraManager{
     }
 
     // 返回USB设备列表
-    private List<UsbDevice> getUsbDeviceList(){
+    public List<UsbDevice> getUsbDeviceList(){
         List<DeviceFilter> deviceFilters = DeviceFilter.getDeviceFilters(mActivity.getApplicationContext(), R.xml.device_filter);
         if(mUSBMonitor == null || deviceFilters == null)
             return null;