如何使用套接字从服务器向Android应用程序发送数据以显示它？
我的Android应用会拍摄照片并将其发送到位于PC上的服务器进行存储，然后检测图片中有多少张脸并使用OpenCV对其进行标记。
我想将检测到的服务器面部值和带有标记面部的图像发送到Android应用，分别使用Toast和ImageView显示。
这是服务器的代码.-
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package fileserver;
/**
*
* @author Andrea
*/
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfRect;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.highgui.Highgui;
import org.opencv.objdetect.CascadeClassifier;
public class FileServer {
public static void run() { //byte[] imagen
System.out.println("\nRunning DetectFaceDemo");
// Create a face detector from the cascade file in the resources
// directory.
/*
La clase CascadeClasifier se emplea para la detección de objetos.
Cargamos el archivo claficador .xml para deteccion frontal de rostros.
*/
CascadeClassifier faceDetector = new CascadeClassifier("C:\\opencv\\sources\\data\\lbpcascades\\lbpcascade_frontalface.xml");
//CascadeClassifier faceDetector = new CascadeClassifier("C:\\opencv\\sources\\data\\lbpcascades\\haarcascade_frontalface_alt.xml");
//Mat image = Highgui.imread("C:\\opencv\\shekhar.JPG");
//Mat image = Highgui.imread("FotoTest1.jpg");
/*
La clase Mat almacena valores numéricos de cada punto de la imagen.
*/
Mat image = Highgui.imread("src/Test.jpg");
/*
Iniciamos la deteccion de rostros en la imagen.
La clase MatOfRect es una clase contenedora especial para la clase Rect.
*/
MatOfRect faceDetections = new MatOfRect();
faceDetector.detectMultiScale(image, faceDetections);
System.out.println(String.format("Detected %s faces", faceDetections.toArray().length));
/*
Dibujamos un rectangulo en cada cara
*/
for (Rect rect : faceDetections.toArray()) {
Core.rectangle(image, new Point(rect.x, rect.y), new Point(rect.x + rect.width, rect.y + rect.height), new Scalar(0, 255, 0));
}
/*
Guardamos la nueva imagen con los rostros detectados
*/
String filename = "faceDetection3.png";
System.out.println(String.format("Writing %s", filename));
Highgui.imwrite(filename, image);
}
public static void main(String[] args) throws IOException {
int filesize = 6022386; // filesize temporary hardcoded
//Indispensable para el funcionamiento de OpenCV
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
long start = System.currentTimeMillis();
int bytesRead;
int current = 0;
// create socket
ServerSocket servsock = new ServerSocket(5000);
while (true) {
System.out.println("Waiting...");
Socket sock = servsock.accept();
System.out.println("Accepted connection : " + sock);
// receive file
byte[] mybytearray = new byte[filesize];
InputStream is = sock.getInputStream();
FileOutputStream fos = new FileOutputStream("src/Test.jpg"); // destination
BufferedOutputStream bos = new BufferedOutputStream(fos);
bytesRead = is.read(mybytearray, 0, mybytearray.length);
current = bytesRead;
// thanks to A. Cádiz for the bug fix
do {
bytesRead = is.read(mybytearray, current,
(mybytearray.length - current));
if (bytesRead >= 0) {
current += bytesRead;
}
} while (bytesRead > -1);
bos.write(mybytearray, 0, current);
bos.flush();
long end = System.currentTimeMillis();
System.out.println(end - start);
bos.close();
/*
Ejecutamos el algoritmo de deteccion de rostros
*/
run();
sock.close();
System.out.println(fos.toString());
}
}
}
Android应用.-
package com.Cardiel.DTO;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.text.SimpleDateFormat;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
import android.provider.MediaStore;
public class DTO extends Activity implements OnClickListener {
private static final String PATTERN = "^(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
String ruta_fotos = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
+ "/misfotos/";
String path_file;
File file = new File(ruta_fotos);
Button btnCam, btnPrueba, btnEnviar;
ImageView imagen;
Intent i;
Bitmap bmp;
int cons;
static final int SERVERPORT = 5000;
String SERVER_IP;
Socket cliente;
DataInputStream input;
BufferedInputStream bis;
BufferedOutputStream bos;
int in;
byte[] byteArray;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dto);
btnCam = (Button) findViewById(R.id.btnn1);
/*btnPrueba = (Button) findViewById(R.id.btn2);*/
btnEnviar = (Button) findViewById(R.id.btn3);
imagen = (ImageView) findViewById(R.id.imageView1);
/* image size */
int width = 300, height = 200;
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width,
height);
imagen.setLayoutParams(params);
btnCam.setOnClickListener(this);
/*btnPrueba.setOnClickListener(this);*/
btnEnviar.setOnClickListener(this);
file.mkdir();
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.btnn1:
path_file = ruta_fotos + getCode() + ".jpg";
File mi_foto = new File(path_file);
try {
mi_foto.createNewFile();
} catch (IOException ex) {
Log.e("ERROR ", "Error:" + ex);
}
Uri uri = Uri.fromFile(mi_foto);
i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(i, cons);
break;
/*case R.id.btn2:
bmp = BitmapFactory.decodeResource(getResources(),
R.drawable.prueba);
imagen.setImageBitmap(bmp);
imagen.setEnabled(false);
break;*/
case R.id.btn3:
if (imagen.isEnabled() == false) {
hacerDialog();
} else {
Toast.makeText(this, "No se ha Seleccionado una imagen",
Toast.LENGTH_LONG).show();
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (resultCode) {
case Activity.RESULT_OK:
bmp = readingImage(path_file);
if (bmp != null) {
imagen.setImageBitmap(bmp);
imagen.setEnabled(false);
}
break;
case Activity.RESULT_CANCELED:
break;
}
}
public String getCode() {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyymmddhhmmss");
String date = dateFormat.format(new Date());
String photoCode = "pic_" + date;
return photoCode;
}
private Bitmap readingImage(String _path) {
Bitmap bitmap = null;
File f = new File(_path);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
try {
bitmap = BitmapFactory.decodeStream(new FileInputStream(f), null,
options);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return bitmap;
}
public void hacerDialog() {
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Ingrese IP");
alert.setMessage("Direccion IP del Servidor");
// Set an EditText view to get user input
final EditText input = new EditText(this);
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
boolean isIP = validate(input.getText().toString());
if (isIP == true) {
SERVER_IP = input.getText().toString();
(new MySyncTask()).execute();
} else {
Toast.makeText(DTO.this, "IP no es Valida",
Toast.LENGTH_LONG).show();
}
}
});
alert.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Canceled.
}
});
alert.show();
}
public static boolean validate(final String ip) {
Pattern pattern = Pattern.compile(PATTERN);
Matcher matcher = pattern.matcher(ip);
return matcher.matches();
}
class MySyncTask extends AsyncTask<Integer, Integer, String> {
@Override
protected String doInBackground(Integer... params) {
try {
cliente = new Socket(SERVER_IP, SERVERPORT);
// Enviar archivo
File myFile = new File(path_file);
byte[] mybytearray = new byte[(int) myFile.length()];
FileInputStream fis = new FileInputStream(myFile);
BufferedInputStream bis = new BufferedInputStream(fis);
bis.read(mybytearray, 0, mybytearray.length);
OutputStream os = cliente.getOutputStream();
// System.out.println("Sending...");
os.write(mybytearray, 0, mybytearray.length);
os.flush();
fis.close();
cliente.close();
} catch (UnknownHostException e) {
Log.v("ERROR", e.toString());
} catch (IOException e) {
Log.v("ERROR", e.toString());
}
return null;
}
}
}
我会感激任何帮助。感谢。
答案 0 :(得分：0)
将结果写入服务器的同一个套接字，并从Android套接字中读取它们......
output.write(yourimage); // write prepareServer message to the server // here I use an object.. you, use your method.
in = new ObjectInputStream(connection.getInputStream()); // get inputstream to read from the server!
newMessageArrived = new incomming((int) transferr.length()); // Define new message object
if ((newMessageArrived = (incomming) in.readUnshared()) != null) { // try to read result from server
//... do ur stuff..
}