我试图使用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，并在服务器读取后，它会显示图像。 但我还没能在服务器上显示发送的图像。 有人可以帮我一把吗？
这是我的服务器代码，它可以获得图像并显示它是显而易见的
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();
}
}
}
}
}
这是我发现图像的客户代码
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();
}
}
}
}
答案 0 :(得分：6)
我的代码现在正在运行。我会发布代码以防有人发现它有用
服务器
package com.example.serverlate;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
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.util.DisplayMetrics;
import android.widget.ImageView;
import android.widget.TextView;
public class ServerLate extends Activity {
private ServerSocket serverSocket;
Handler updateConversationHandler;
Thread serverThread = null;
private ImageView imageView;// private TextView text;
public static final int SERVERPORT = 6000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_server_late);
imageView=(ImageView) findViewById(R.id.imageViewServer);//text = (TextView) findViewById(R.id.textView01);
updateConversationHandler = new Handler();
this.serverThread = new Thread(new ServerThread());
this.serverThread.start();
}
@Override
protected void onStop() {
super.onStop();
try {
serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
class ServerThread implements Runnable {
public void run() {
Socket socket = null;
try {
serverSocket = new ServerSocket(SERVERPORT);
} catch (IOException e) {
e.printStackTrace();
}
while (!Thread.currentThread().isInterrupted()) {
try {
socket = serverSocket.accept();
CommunicationThread commThread = new CommunicationThread(socket);
new Thread(commThread).start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
class CommunicationThread implements Runnable {
private Socket clientSocket;
private DataInputStream input;//private BufferedReader input;
public CommunicationThread(Socket clientSocket) {
this.clientSocket = clientSocket;
try {
//this.input = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));
InputStream in = this.clientSocket.getInputStream();
this.input = new DataInputStream(in);
} catch (IOException e) {
e.printStackTrace();
}
}
public void run() {
System.out.println("hello");
while (!Thread.currentThread().isInterrupted()) {
try {
byte[] data;//String read = input.readLine();
int len= this.input.readInt();
data = new byte[len];
if (len > 0) {
this.input.readFully(data,0,data.length);
}
/*
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] data;
int length = 0;
while ((length = this.input.read(data))!=-1) {
out.write(data,0,length);
}
data=out.toByteArray();
*/
updateConversationHandler.post(new updateUIThread(data));//updateConversationHandler.post(new updateUIThread(read));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
class updateUIThread implements Runnable {
private byte[] byteArray;//private String msg;
public updateUIThread(byte[] array){ //public updateUIThread(String str) {
this.byteArray=array; //this.msg = str;
}
@Override
public void run() {
Bitmap bitmap = BitmapFactory.decodeByteArray(byteArray , 0, byteArray .length);
imageView.setImageBitmap(bitmap);//text.setText(text.getText().toString()+"Client Says: "+ msg + "\n");
}
}
}
客户端
package com.example.clientlate;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.PrintWriter;
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.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
public class ClientLate 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_client_late);
new Thread(new ClientThread()).start();
}
public void onClick(View view) {
try {
ImageView imageView=(ImageView) findViewById(R.id.imageView1);//EditText et = (EditText) findViewById(R.id.EditText01);
Bitmap bmp=((BitmapDrawable)imageView.getDrawable()).getBitmap(); //String str = et.getText().toString();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bmp.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos);
byte[] array = bos.toByteArray();
OutputStream out = socket.getOutputStream();
DataOutputStream dos = new DataOutputStream(out);
dos.writeInt(array.length);
dos.write(array, 0, array.length);
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
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();
}
}
}
}
答案 1 :(得分：2)
尝试使用以下代码将图像放入字节数组中：
ImageView iv=(ImageView)findViewById(R.id.imageView);
Bitmap bmp=((BitmapDrawable)iv.getDrawable()).getBitmap();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte array [] = baos.toByteArray();
此外，我必须注意你在主线程上执行getBytes（）。这仅适用于较旧的Android版本。最好把它放在你的主题中。