解决UVCCamera项目报错:could not open c

在使用UVCCamera时，打开外部摄像头时崩溃并抛出异常:could not open camera:err=-1

2019-04-28 17:56:26.992 17305-17330/? E/UVCCamera: [17330*UVCCamera.cpp:172:connect]:could not open camera:err=-1
    
    --------- beginning of crash
2019-04-28 17:56:26.993 17305-17330/? E/AndroidRuntime: FATAL EXCEPTION: BaseActivity
    Process: com.serenegiant.usbcameratest, PID: 17305
    java.lang.UnsupportedOperationException: open failed:result=-1
        at com.serenegiant.usb.UVCCamera.open(UVCCamera.java:204)
        at com.serenegiant.usbcameratest.MainActivity$2$1.run(MainActivity.java:142)
        at android.os.Handler.handleCallback(Handler.java:751)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:159)
        at android.os.HandlerThread.run(HandlerThread.java:61)

解决方案

方案1. 修改NDK版本

将项目根目录的local.properties文件中的ndk.dir 路径改为14c, ndk下载路径为: https://developer.android.com/ndk/downloads/older_releases.html

方案2. 将编译器改为GCC

取消libuvccamera / src / main / jni / Application.mk 文件中的注解NDK_TOOLCHAIN_VERSION := 4.9