demo效果图：
PC端
android端
大体流程
android端是服务器端，绑定IP和端口，监听来自PC端的连接， pc端通过socket与服务器andorid端传输图片。
主要代码
android端
private Runnable mythread = new Runnable(){
@Override
public void run() {
// TODO Auto-generated method stub
try {
ServerSocket serverSocket =new ServerSocket();
Log.i("start server", "start server ------port :3200");
while (true) {
Socket socket =serverSocket.accept();
new server(socket ,imageView).start();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} public void startserver(View v) {
Thread thread1 = new Thread(mythread, "thread1");
thread1.start();
}public class server extends Thread {
private ImageView imageView;
private Socket socket;
public static byte imageByte[];
private Handler handler;
class MyHandler extends Handler{
public MyHandler(Looper looper){
super(looper);
}
public void handleMessage(Message msg){
super.handleMessage(msg);
imageView.setImageBitmap((Bitmap)msg.obj);
}
}
public void run() {
Looper looper = Looper.getMainLooper(); //主线程的Looper对象
handler = new MyHandler(looper);
try {
int imageSize=;//expected image size 640X480X3
InputStream in = socket.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte buffer[] = new byte[];
int remainingBytes = imageSize; //
while (remainingBytes > ) {
int bytesRead = in.read(buffer);
if (bytesRead < ) {
throw new IOException("Unexpected end of data");
}
baos.write(buffer, , bytesRead);
remainingBytes -= bytesRead;
}
in.close();
imageByte = baos.toByteArray();
baos.close();
socket.close();//关闭socket，一次连接传一幅图像 int nrOfPixels = imageByte.length / 3; // Three bytes per pixel.
int pixels[] = new int[nrOfPixels];
for(int i = ; i < nrOfPixels; i++) {
int r = imageByte[*i];
int g = imageByte[*i + ];
int b = imageByte[*i + ];
if (r < )
r = r + ; //Convert to positive
if (g < )
g = g + ; //Convert to positive
if (b < )
b = b + ; //Convert to positive
pixels[i] = Color.rgb(b,g,r);
}
Bitmap bitmap = Bitmap.createBitmap(pixels, , , Bitmap.Config.ARGB_8888);
Message msg = handler.obtainMessage();
msg.obj = bitmap;
handler.sendMessage(msg);//图像已经转换好了，发送消息给UI线程更新图像
} catch (Exception e) {
// TODO: handle exception
} PC端
VideoCapture cap(); /* open webcam */
if(!cap.isOpened())
{
return -;
}
Mat frame;
cap.set(CV_CAP_PROP_FRAME_WIDTH, ); /* set width */
cap.set(CV_CAP_PROP_FRAME_HEIGHT, ); /* set height */ try
{
boost::asio::io_service io_service;
tcp::endpoint end_point(boost::asio::ip::address::from_string(argv[]), ); tcp::socket socket(io_service); boost::system::error_code ignored_error; while (true)
{
cap>>frame; imshow("client",frame); char c=(char)waitKey();
if (c==)
{
break;
} frame = (frame.reshape(,)); // to make it continuous
socket.connect(end_point);
std::string message((char *)frame.data,); /* the size of mat data is 320*240*3 */
socket.write_some(boost::asio::buffer(message), ignored_error);
cout<<"send image finished"<<endl; socket.close(); }
}
catch (std::exception& e)
{
std::cerr << e.what() << std::endl;
}
运行 asio.exe 192.168.1.101