android socket client

最新推荐文章于 2024-05-14 09:48:32 发布

最新推荐文章于 2024-05-14 09:48:32 发布 · 194 阅读

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#Socket #Android #Java #OS #Swing

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本文介绍了一个基于Android平台的简单客户端应用程序，该应用通过Socket连接到指定服务器进行数据收发。客户端具备登录和发送消息的功能，并能实时显示服务器返回的消息。

package com.a;


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class Test extends Activity implements Runnable {
	/** Called when the activity is first created. */
	private TextView tv_msg = null;
	private EditText ed_msg = null;
	private Button btn_send = null;
	private Button btn_login = null;
	private static final String HOST = "10.166.112.158";
	private static final int PORT = 9999;
	private Socket socket = null;
	private BufferedReader in = null;
	private PrintWriter out = null;
	private String content = "";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.client);
		tv_msg = (TextView) this.findViewById(R.id.TextView);
		ed_msg = (EditText) this.findViewById(R.id.EditText01);
		btn_login = (Button) this.findViewById(R.id.Button01);
		btn_send = (Button) this.findViewById(R.id.Button02);
		try {
			socket = new Socket(HOST, PORT);
			in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
			out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
		} catch (Exception ex) {
			ShowDialog("登陆异常:" + ex.getMessage());
		}
		btn_send.setOnClickListener(new Button.OnClickListener() {

			public void onClick(View v) {
				String msg = ed_msg.getText().toString();
				if (socket.isConnected()) {
					if (!socket.isOutputShutdown()&& msg.length()>0) {
						out.println(msg);
						out.flush();// ju shuo important
						ed_msg.setText("");
						Toast.makeText(Test.this, "发送完成!", Toast.LENGTH_SHORT).show();
					}else {
						Toast.makeText(Test.this, "没有内容！不会被发送!", Toast.LENGTH_SHORT).show();
						ed_msg.setFocusable(true);
					}
				}
			}

		});
		btn_login.setOnClickListener(new Button.OnClickListener() {
			public void onClick(View v) {
				String msg = ed_msg.getText().toString();
				if(msg.length()<=0) {
					Toast.makeText(Test.this, "content应包含内容！", Toast.LENGTH_SHORT).show();
				}
			}
		});
		new Thread(this).start();
	}

	public void ShowDialog(String msg) {
		new AlertDialog.Builder(this).setTitle("提示").setMessage(msg)
				.setPositiveButton("OK", new DialogInterface.OnClickListener() {

					public void onClick(DialogInterface dialog, int which) {
						
					}

				}).show();
	}

	public void run() {
		try {
			while (true) {
				if(socket.isConnected()){
					if(!socket.isInputShutdown()){
						if ((content = in.readLine()) != null) {
							Log.i("TAG", "++ "+content);
							content += "\n";
							mHandler.sendMessage(mHandler.obtainMessage());
						}else{
						}
					}
				}
			}
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}
//要有SWING的思想，回调，传参
	public Handler mHandler = new Handler() {
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			Log.i("TAG", "-- "+msg);
			tv_msg.setText(tv_msg.getText().toString() + content);
		}
	};
}