Android编程之客户端通过socket与服务器通信的方法
本文实例讲述了Android编程之客户端通过socket与服务器通信的方法。分享给大家供大家参考,具体如下:
下面是一个demo,Android客户端通过socket与服务器通信。
由于Android里面可以完全使用java.io.*包和.*包,那么,实际上,逻辑部分与J2SE没有区别。只是UI代码不一样。
Android客户端通过socket与服务器通信分为下面5步:
(1)通过IP地址和端口实例化Socket,请求连接服务器;
代码如下:
socket = new Socket("10.14.114.127",54321); //IP:10.14.114.127,端口54321
(2)获取Socket流以进行读写,并把流包装进BufferWriter或者PrintWriter
代码如下:
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
这里涉及了三个类:socket.getOutputStream得到socket的输出字节流,OutputStreamWriter是字节流向字符流转换的桥梁,BufferWriter是字符流,然后再包装进PrintWriter。
(3)对Socket进行读写
代码如下:
out.println(message);
(4)关闭打开的流
代码如下:
out.close();
完整工程代码如下:
package com.yarin.android.Examples_08_04;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import .Socket;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Activity01 extends Activity
{
private final String DEBUG_TAG = "Activity01";
private TextView mTextView = null;
private EditText mEditText = null;
private Button mButton = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(yout.main);
mButton = (Button)findViewById(R.id.Button01);
mTextView = (TextView)findViewById(R.id.TextView01);
mEditText = (EditText)findViewById(R.id.EditText01);
//登陆
mButton.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Socket socket = null;
String message = mEditText.getText().toString() + "/r/n";
try
{
//创建Socket
// socket = new Socket("192.168.1.110",54321);
socket = new Socket("10.14.114.127",54321); //IP:10.14.114.127,端口54321
//向服务器发送消息
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);
out.println(message);
//接收来自服务器的消息
BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String msg = br.readLine();
if ( msg != null )
{
mTextView.setText(msg);
}
else
{
mTextView.setText("数据错误!");
}
//关闭流
out.close();
br.close();
//关闭Socket
socket.close();
}
catch (Exception e)
{
// TODO: handle exception
Log.e(DEBUG_TAG, e.toString());
}
}
});
}
}
布局文件main.xml
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
android:id="@+id/TextView01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="这里显示接收到服务器发来的信息"
/>
android:id="@+id/EditText01"
android:text="输入要发送的内容"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
android:id="@+id/Button01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="发送"
/>
AndroidManifest.xml文件如下
package="com.yarin.android.Examples_08_04"
android:versionCode="1"
android:versionName="1.0">
android:label="@string/app_name">
当然,还有服务器端得代码
package com.yarin.android.Examples_08_04;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import .ServerSocket;
import .Socket;
public class Server implements Runnable
{
public void run()
{
try
{
//创建ServerSocket
ServerSocket serverSocket = new ServerSocket(54321);
while (true)
{
//接受客户端请求
Socket client = serverSocket.accept();
System.out.println("accept");
try
{
//接收客户端消息
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
String str = in.readLine();
System.out.println("read:" + str);
//向服务器发送消息
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(client.getOutputStream())),true);
out.println("server message");
//关闭流
out.close();
in.close();
}
catch (Exception e)
{
System.out.println(e.getMessage());
e.printStackTrace();
}
finally
{
//关闭
client.close();
System.out.println("close");
}
}
}
catch (Exception e)
{
System.out.println(e.getMessage());
}
}
//main函数,开启服务器
public static void main(String a[])
{
Thread desktopServerThread = new Thread(new Server());
desktopServerThread.start();
}
}
先开启服务器代码
java Server即可
然后启动android模拟器。运行结果
这是Android客户端。输入12345,点击发送:
这是服务器端收到的消息