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4.7 KiB
4.7 KiB
AndroidUSBCamera开源项目
AndroidUSBCamera基于saki4510t/UVCCamera开发,该项目对USB Camera(UVC设备)的使用和视频数据采集进行了高度封装,能够帮助开发者通过几个简单的API实现USB Camera设备的检测、连接、预览和视频数据采集。主要功能包括:USB Camera实时预览;本地录制mp4格式视频;png格式图片抓拍;实时获取编码后的音视频数据流。
如何使用AndroidUSBCamera项目
1.添加依赖到本地工程
To get a Git project into your build:
第一步 添加JitPack仓库到工程gradle Step 1. Add the JitPack repository to your build file Add it in your root build.gradle at the end of repositories:
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
第二步 添加依赖到app Module的gradle
Step 2. Add the dependency
dependencies {
compile 'com.github.jiangdongguo:AndroidUSBCamera:v1.0.0'
}
2.初始化引擎,注册USB设备事件监听器
Init AndroidUSBCamera engine,register the USB device event listener
USBCameraManager mUSBManager = USBCameraManager.getInstance();
// mTextureView为UVCCameraTextureView实例,继承于TextureView
// 用于渲染图像,需要在xml文件中定义
CameraViewInterface mUVCCameraView = (CameraViewInterface) mTextureView;
// 初始化引擎,注册事件监听器
mUSBManager.init(this, mUVCCameraView, new USBCameraManager.OnMyDevConnectListener() {
// 插入USB设备
@Override
public void onAttachDev(UsbDevice device) {
if(mUSBManager == null || mUSBManager.getUsbDeviceCount() == 0){
showShortMsg("未检测到USB摄像头设备");
return;
}
// 请求打开摄像头
if(! isRequest){
isRequest = true;
if(mUSBManager != null){
mUSBManager.requestPermission(0);
}
}
}
// 拔出USB设备
@Override
public void onDettachDev(UsbDevice device) {
if(isRequest){
// 关闭摄像头
isRequest = false;
mUSBManager.closeCamera();
showShortMsg(device.getDeviceName()+"已拨出");
}
}
// 连接USB设备成功
@Override
public void onConnectDev(UsbDevice device) {
}
// 与USB设备断开连接
@Override
public void onDisConnectDev(UsbDevice device) {
}
});
3. 注册USB设备广播事件监听器,开始Camera预览
Register the USB device broadcast event listener and start the Camera Preview
// 注册USB事件广播监听器
if(mUSBManager != null){
mUSBManager.registerUSB();
}
// 恢复Camera预览
if(mUVCCameraView != null){
mUVCCameraView.onResume();
}
4. 注销USB设备广播事件监听器,停止Camera预览
Unregister the USB device broadcast event listener and stop the Camera Preview
// 注销USB事件广播监听器
if(mUSBManager != null){
mUSBManager.unregisterUSB();
}
// 暂停Camera预览
if(mUVCCameraView != null){
mUVCCameraView.onPause();
}
5. 图片抓拍
Picture capturing
if(mUSBManager == null || ! mUSBManager.isCameraOpened()){
showShortMsg("抓拍异常,摄像头未开启");
return;
}
mUSBManager.capturePicture(picPath);
6. 本地录制(可实时获取音视频数据流)
recoring mp4,and get media real-stream
if(mUSBManager == null || ! mUSBManager.isCameraOpened()){
showShortMsg("录制异常,摄像头未开启");
return;
}
// 开始录制
if( !mUSBManager.isRecording()){
mUSBManager.startRecording(videoPath, new AbstractUVCCameraHandler.OnEncodeResultListener() {
@Override
public void onEncodeResult(byte[] data, int offset, int length, long timestamp, int type) {
// type=0为视频流,type=1为音频流
});
}
// 停止录制
mUSBManager.stopRecording();
7. 释放引擎资源
release resource
// 释放资源
if(mUSBManager != null){
mUSBManager.release();
}
USBCameraManager API (Other)
(1) void requestPermission(int index):请求授予开启USB摄像头权限;
(2) int getUsbDeviceCount():返回查询到的可用USB Camera数目;
(3) boolean isRecording():判断是否正在录制视频;
(4) boolean isCameraOpened():判断USB摄像头是否正常打开;
(5) void release():释放资源
(6) USBMonitor getUSBMonitor():返回USBMonitor实例;