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标题: USB设备抢占冲突 [打印本页]

author: cus7 time: 2021-10-19 08:40
标题: USB设备抢占冲突
我们的项目中有用到USB Camera，这个是由我们进行开启拍照。目前采用商用版本的软件，登陆的时候会发生抢占USB问题

author: cus7 time: 2021-10-19 09:00
把MainService中的UvcManager.getInstance(this).selfCheck();
注释掉，会报如下错误。

A/libc: Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x8 in tid 13033 (HeapTaskDaemon), pid 13009 (om.smarteye.mcu)

author: cus7 time: 2021-10-19 09:04
E/ActivityThread: Failed to find provider info for com.smarteye.usbclient

ocalProvider
E/MCUApplication: mcp can not find com.smarteye.usbclient package
W/System.err: android.content.pm.PackageManager$NameNotFoundException: Application package com.smarteye.usbclient not found
W/System.err:    at android.app.ContextImpl.createPackageContextAsUser(ContextImpl.java:2344)
W/System.err:    at android.app.ContextImpl.createPackageContext(ContextImpl.java:2315)
      at android.content.ContextWrapper.createPackageContext(ContextWrapper.java:876)
W/System.err:    at com.smarteye.service.MCUApplication.initUsbClient(MCUApplication.java:1257)
      at com.smarteye.service.MCUApplication.init(MCUApplication.java:1236)
W/System.err:    at com.smarteye.service.MCUApplication.onCreate(MCUApplication.java:1224)
      at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1202)
W/System.err:    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:7588)
      at android.app.ActivityThread.access$2600(ActivityThread.java:260)
W/System.err:    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2435)
      at android.os.Handler.dispatchMessage(Handler.java:110)
W/System.err:    at android.os.Looper.loop(Looper.java:219)
      at android.app.ActivityThread.main(ActivityThread.java:8668)
W/System.err:    at java.lang.reflect.Method.invoke(Native Method)
      at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
W/System.err:    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1109)
W/om.smarteye.mc: Verification of void com.smarteye.camera.CameraUtils.closeExtCameraOnly() took 338.198ms
W/VideoCapabilities: Unrecognized profile/level 0/0 for video/mpeg2
Unrecognized profile/level 0/2 for video/mpeg2

author: cus7 time: 2021-10-19 09:26
将MCUApplication中的initUsbClient注释掉。

会报错
E/libc: Access denied finding property "ro.serialno"

倒追程序直接奔溃

author: bvwl time: 2021-10-19 09:43
您可以尝试注释掉USB连接的广播，在AndroidManifest.xml文件中，有一个USB静态广播的注册类UsbStateBroadCastReceiver，注释掉这个类再尝试

author: cus7 time: 2021-10-19 09:48
diff --git a/app/src/main/java/com/smarteye/service/MainService.java b/app/src/main/java/com/smarteye/service/MainService.java
index c9211a9..322999a 100644
--- a/app/src/main/java/com/smarteye/service/MainService.java
+++ b/app/src/main/java/com/smarteye/service/MainService.java
@@ -1528,7 +1528,7 @@ public class MainService extends Service implements JNIMessageEvent, UserStatusC
            if (!TextUtils.isEmpty(addr)) {
                     RtspManager.getInstance(MainService.this).openRtsp(addr);
            }
-             UvcManager.getInstance(this).selfCheck();
+             //UvcManager.getInstance(this).selfCheck();^M
            init28181Config();
            loadMediaFile();
            initAutoAction();

author: cus7 time: 2021-10-19 09:48
这里需要注释掉么？
这个是MainService强制去注册的

author: bvwl time: 2021-10-19 10:01
这个是动态注册，插入USB Camera时，如果MCP不在运行，是不需要注释的，如果在运行中，需要注释掉

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