两个用TCP协议连接的android应用程序

问题描述

我正在尝试使用TCP协议连接两个android应用程序。

客户端有一个imageView，当你按下按钮时，它应该将该图像发送到服务器并在服务器读取之后它，假设显示图像。

但是我无法在服务器中显示发送的图像。

有人可以帮我一把吗？



这是我的服务器代码，它可以获得图像并且可以显示它/>

I'm trying to make two android applications connected with TCP protocol.
Client has an imageView and when you push the button, it is supposed to send that image to the server and after server reads it, it is suppose to display the image.
but I haven't been able to display the sent image in server.
somebody could please give me a hand?

THIS IS MY SERVER CODE THAT GETS THE IMAGE AND IT IS SUPPOSE TO DISPLAY IT

    package com.example.simpleserver;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.ImageView;
import android.widget.TextView;

 public class SimpleServer extends Activity {
   ServerSocket ss = null;
   Thread myCommsThread = null;
   protected static final int MSG_ID = 0x1337;
   public static final int SERVERPORT = 6000;
   private Bitmap bitmap;

   @Override
  public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_simple_server);
   TextView tv = (TextView) findViewById(R.id.textView01);
   tv.setText("Nothing from client yet");
   this.myCommsThread = new Thread(new CommsThread());
   this.myCommsThread.start();
   }

   @Override
   protected void onStop() {
   super.onStop();
   try {
        // make sure you close the socket upon exiting
       ss.close();
    } catch (IOException e) {
       e.printStackTrace();
    }
   }

   Handler myUpdateHandler = new Handler() {
    public void handleMessage(Message msg) {
        switch (msg.what) {
            case MSG_ID:
                 ImageView tv = (ImageView) findViewById(R.id.imageViewServer);
                 tv.setImageBitmap(bitmap);
                 break;
               default:
                   break;
               }
         super.handleMessage(msg);
     }
  };
   class CommsThread implements Runnable {
    public void run() {
       Socket s = null;
        try {
        ss = new ServerSocket(SERVERPORT );
    } catch (IOException e) {
        e.printStackTrace();
    }
    while (!Thread.currentThread().isInterrupted()) {
        Message m = new Message();
        m.what = MSG_ID;

        try {
            if (s == null)
                s = ss.accept();
            InputStream in = s.getInputStream();
            DataInputStream dis = new DataInputStream(in);

            int len = dis.readInt();
            byte[] data = new byte[len];
            if (len > 0) {
                dis.readFully(data);
            }
            bitmap = BitmapFactory.decodeByteArray(data , 0, data .length);
            myUpdateHandler.sendMessage(m);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
}
}

这是我的客户代码发现图像

AND THIS IS MY CLIENT CODE THAT SENDS THE IMAGE

    		package com.example.simpleclient;

		import java.io.DataOutputStream;
		import java.io.IOException;
		import java.io.OutputStream;
		import java.net.InetAddress;
		import java.net.Socket;
		import java.net.UnknownHostException;
		import java.nio.ByteBuffer;

		import android.app.Activity;
		import android.graphics.Bitmap;
		import android.graphics.drawable.BitmapDrawable;
		import android.os.Bundle;
		import android.view.View;
		import android.widget.ImageView;

		public class SimpleClient extends Activity {

			private Socket socket;

			private static final int SERVERPORT = 5000;
			private static final String SERVER_IP = "10.0.2.2";

			@Override
			public void onCreate(Bundle savedInstanceState) {
				super.onCreate(savedInstanceState);
				setContentView(R.layout.activity_simple_client);
				new Thread(new ClientThread()).start();
			}

			public void onClick(View view) {
				try {;
					getBytes();

				} catch (UnknownHostException e) {
					e.printStackTrace();
				} catch (IOException e) {
					e.printStackTrace();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
			public void getBytes() throws IOException{
				ImageView iv=(ImageView)findViewById(R.id.imageView1);
				//convert the image to bitmap to be send in the intent
				Bitmap bmp=((BitmapDrawable)iv.getDrawable()).getBitmap();
				int bytes = bmp.getByteCount();
				ByteBuffer buffer = ByteBuffer.allocate(bytes); //Create a new buffer
				bmp.copyPixelsToBuffer(buffer); //Move the byte data to the buffer

				byte[] array = buffer.array();
				int start=0;
				int len=array.length;
				if (len < 0)
					throw new IllegalArgumentException("Negative length not allowed");
				if (start < 0 || start >= array.length)
					throw new IndexOutOfBoundsException("Out of bounds: " + start);

				OutputStream out = socket.getOutputStream();
				DataOutputStream dos = new DataOutputStream(out);

				dos.writeInt(len);
				if (len > 0) {
					dos.write(array, start, len);
				}

			}

			class ClientThread implements Runnable {

				@Override
				public void run() {

					try {
						InetAddress serverAddr = InetAddress.getByName(SERVER_IP);

						socket = new Socket(serverAddr, SERVERPORT);

					} catch (UnknownHostException e1) {
						e1.printStackTrace();
					} catch (IOException e1) {
						e1.printStackTrace();
					}

				}

			}
		}
>

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