Android USBCamera，通过UVCCamera开发通用库

AndroidUSBCamera ============ 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. [中文文档： AndroidUSBCamera，UVCCamera开发通用库](http://blog.csdn.net/andrexpert/article/details/78324181) Usage ------- ### 1.Add to your Android Studio project Step 1. Add the JitPack repository to your build file.Add it in your root build.gradle at the end of repositories: ```java allprojects { repositories { ... maven { url 'http://raw.github.com/saki4510t/libcommon/master/repository/' } maven { url 'https://jitpack.io' } } } ``` Step 2. Add the dependency ```java dependencies { implementation 'com.github.jiangdongguo:AndroidUSBCamera:2.2.8' } ``` ### 2. APIs Introduction (1) In order to using it correctly,the following four steps must be achieved： ```java mUVCCameraView = (CameraViewInterface) mTextureView; mUVCCameraView.setCallback(mCallback); mCameraHelper = UVCCameraHelper.getInstance(); // set default preview size mCameraHelper.setDefaultPreviewSize(1280,720); // set default frame format，defalut is UVCCameraHelper.Frame_FORMAT_MPEG // if using mpeg can not record mp4,please try yuv // mCameraHelper.setDefaultFrameFormat(UVCCameraHelper.FRAME_FORMAT_YUYV); mCameraHelper.initUSBMonitor(this, mUVCCameraView, mDevConnectListener); ``` 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() { @Override public void onAttachDev(UsbDevice device) { // request open permission(must have) if (!isRequest) { isRequest = true; if (mCameraHelper != null) { mCameraHelper.requestPermission(0); } } } @Override public void onDettachDev(UsbDevice device) { // close camera(must have) if (isRequest) { isRequest = false; mCameraHelper.closeCamera(); } } @Override public void onConnectDev(UsbDevice device, boolean isConnected) { } @Override public void onDisConnectDev(UsbDevice device) { } }; ```  (2) Capturing JPG Images ```java mCameraHelper.capturePicture(picPath, new AbstractUVCCameraHandler.OnCaptureListener() { @Override public void onCaptureResult(String path) { Log.i(TAG,"save path：" + path); } }); ``` (3) Recording Mp4,supporting close voice and save file automatic. ```java RecordParams params = new RecordParams(); params.setRecordPath(videoPath); params.setRecordDuration(0); // 0,do not cut save params.setVoiceClose(mSwitchVoice.isChecked()); // is close voice mCameraHelper.startPusher(params, new AbstractUVCCameraHandler.OnEncodeResultListener() { @Override public void onEncodeResult(byte[] data, int offset, int length, long timestamp, int type) { // type = 1,h264 video stream if (type == 1) { // FileUtils.putFileStream(data, offset, length); } // type = 0,aac audio stream if(type == 0) { } } @Override public void onRecordResult(String videoPath) { Log.i(TAG,"videoPath = "+videoPath); } }); // of course,if you only want to getting h.264 and aac stream // you can do like this mCameraHelper.startPusher(listener); ``` (4) setting camera's brightness and contrast. ```java mCameraHelper.setModelValue(UVCCameraHelper.MODE_BRIGHTNESS,progress); mCameraHelper.setModelValue(UVCCameraHelper.MODE_CONTRAST,progress); mCameraHelper.getModelValue(UVCCameraHelper.MODE_BRIGHTNESS); mCameraHelper.getModelValue(UVCCameraHelper.MODE_CONTRAST); ... ```  (5) switch resolutions and camera. ```java mCameraHelper.updateResolution(widht, height); ```  At last,remember adding permissions:   ``` <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.RECORD_AUDIO" /> ``` Other Library about Android Camera ------- [OkCamera](https://github.com/jiangdongguo/OkCamera) Android Camera univsersally operation. [AndroidRecordMp4](https://github.com/jiangdongguo/AndroidRecordMp4) Using MediaCodec realize record mp4. [AndroidYuvOsd](https://github.com/jiangdongguo/AndroidYuvOsd) YUV data operation. [Lame4Mp3](https://github.com/jiangdongguo/Lame4Mp3) pcm to mp3 and pcm to aac.   License ------- Copyright 2018 Jiangdongguo Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.