[转载]android客户端和java服务端之间用socket来传输图片

为研究android客户端和java服务端之间用socket来传输图片的问题，困扰我很久，网上的参考内容不是完整，就是不详细，所以鉴于自己的痛苦，测试成功后，我决定把代码共享，希望遇到这个问题的同胞，不再痛苦。

一、从服务端向客户端发送图片：

服务端的代码：

import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class Server01 {
    public static void main(String[] args) {
        try {
            ServerSocket server = new ServerSocket(30000);
            Socket socket = server.accept();
            DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
            FileInputStream fis = new FileInputStream("C:/sunnyTest/picture/cat01.jpg");
            int size = fis.available();

            System.out.println("size = "+size);
            byte[] data = new byte[size];
            fis.read(data);
            dos.writeInt(size);
            dos.write(data);

            dos.flush();
            dos.close();
            fis.close();
            socket.close();
            server.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

客户端的代码：

import com.login.R;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class TestActivity extends Activity {

    private ImageView imageView = null;
    private Bitmap bmp = null;

    private ImageView imageView02;
    private Bitmap bmp02;
    private Button button02;
    private String uploadFile="/mnt/sdcard/qt.png";

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.image);

        imageView = (ImageView) findViewById(R.id.image01);
        Button btn = (Button) findViewById(R.id.Button01);
        btn.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {

                Socket socket = null;
                try {
                    socket = new Socket("192.168.1.203", 30000);
                    DataInputStream dataInput = new DataInputStream(socket.getInputStream());
                    int size = dataInput.readInt();
                    byte[] data = new byte[size];
                    int len = 0;
                    while (len < size) {
                        len += dataInput.read(data, len, size - len);
                    }
                    ByteArrayOutputStream outPut = new ByteArrayOutputStream();
                    bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
                    bmp.compress(CompressFormat.PNG, 100, outPut);
                    imageView.setImageBitmap(bmp);

                    //Bitmap bitmap = BitmapFactory.decodeStream(dataInput);
                    //myHandler.obtainMessage().sendToTarget();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                finally {
                    try {
                        socket.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                    }
        });
 }
 }

二、客户端向服务端发送图片的代码：

服务端：

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class Server02 {
    public static void main(String[] args) {
        try {
            ServerSocket server = new ServerSocket(40000);
            Socket socket = server.accept();
            DataInputStream dos = new DataInputStream(socket.getInputStream());
            int len = dos.available();
            System.out.println("len = "+len);
            byte[] data = new byte[len];
            dos.read(data);

            System.out.println("data = "+data);
            dos.close();
            socket.close();
            server.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

客户端：

[java] view plaincopy