androidusbcamera.rar

AndroidUSBCamera[](https://jitpack.io/#jiangdongguo/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.supporting overlay and record device's mic. Supporting Android 5.0,6.0,7.0,8.0,9.0,10.0 [中文文档： AndroidUSBCamera，UVCCamera开发通用库](http://blog.csdn.net/andrexpert/article/details/78324181) - JNI Source Download: [NDK Library:UVCCameraLib](https://github.com/jiangdongguo/UVCCameraLib) 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:2.3.6' } ``` ### 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 params.setSupportOverlay(true); // overlay only support armeabi-v7a & arm64-v8a 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:   ```xml <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.RECORD_AUDIO" /> ``` ### 3. Solving Problems 1. connected,but preview failed Please checking your preview format and change YUV to MJPEG or MJPEG to YUV,because some usb devices only supporting YUV 2. never found the device - confirm your phone support otg - get a file from your sd card named failed-device.txt in the path of root sd card/UsbCamera/failed-device.txt and tell me - if your device is Android 10(Q),please change your versionTarget to 27 and below, because these is a bug in Android Q SDK. ### 4. Updating #### 2020.01.15 version 2.3.2 1. support adding time overlay(attention: overlay only support armeabi-v7a & arm64-v8a); 2. support recording device mic; 3. update to androidx and update commonLibVersion from 2.14.2 to 4.1.1; 4. fix saving files failed. #### 2020.04.14 version 2.3.4 1. fix pull version 2.3.2 failed. 2. fix android 9.0 sometimes can not preview. 3.fix pull out crash 1. 4. update to all so files to new. #### 2021.03.16 version 2.3.5 1. fix stop preview crash. 2. open UVCCamera NDK Library project----[UVCCameraLib](https://github.com/jiangdongguo/UVCCameraLib) #### 2021.04.08 version 2.3.6 1. fix pull out crash 2. Download APK(2.3.4) ----------------- &emsp;In order