AndroidUSBCamera is developed based on the [saki4510t/UVCCamera](https://github.com/saki4510t/UVCCamera), the project of USB Camera (UVC equipment) and the use of video data acquisition are highly packaged, and it can help developers using USB Camera devices easily by a few simple APIs. By using AndroidUSBCamera,you can detect and connect to a USB Camera simply.And you also can use it to realize taking picture,recording mp4,switching resolutions ,getting h.264/aac/yuv(nv21) stream and setting camera's contrast or brightness,supporting 480P、720P、1080P and higher,etc.
To be attention,mCallback is a object of interface CameraViewInterface.Callback,and it's used to be listenering surfaceView
created or detoryed.mDevConnectListener is a object of interface UVCCameraHelper.OnMyDevConnectListener,and it's used to be listenering to detect and conntect USB device.Here is the coding order:
```java
private CameraViewInterface.Callback mCallback = new CameraViewInterface.Callback mCallback(){
@Override
public void onSurfaceCreated(CameraViewInterface view, Surface surface) {
// must have
if (!isPreview && mCameraHelper.isCameraOpened()) {
mCameraHelper.startPreview(mUVCCameraView);
isPreview = true;
}
}
@Override
public void onSurfaceChanged(CameraViewInterface view, Surface surface, int width, int height) {
}
@Override
public void onSurfaceDestroy(CameraViewInterface view, Surface surface) {
// must have
if (isPreview && mCameraHelper.isCameraOpened()) {
mCameraHelper.stopPreview();
isPreview = false;
}
}
}
private UVCCameraHelper.OnMyDevConnectListener listener = new UVCCameraHelper.OnMyDevConnectListener() {
 In order to display the function, I develop a simple released apk,which is based on version 2.3.1,and the build version is 28.0.3.Here is my configs and is you have any question please tell me ,I will follow it do my best.
