android客户端在多个界面切换时保持socket的链接

android客户端在多个界面切换时保持socket的链接

研究一个socket在多个界面切换时保持链接的问题，现在我提供客户端的源码给有需要的人参考。

1、ApplicationUtil类：

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import https://www.360docs.net/doc/409720617.html,.Socket;

import https://www.360docs.net/doc/409720617.html,.UnknownHostException;

import android.app.Application;

public class ApplicationUtil extends Application{

private Socket socket;

private DataOutputStream out = null;

private DataInputStream in = null;

public void init() throws IOException, Exception{

this.socket = new Socket("192.168.1.104",10202);

this.out = new DataOutputStream(socket.getOutputStream());

this.in = new DataInputStream(socket.getInputStream());

}

public Socket getSocket() {

return socket;

}

public void setSocket(Socket socket) {

this.socket = socket;

}

public DataOutputStream getOut() {

return out;

}

public void setOut(DataOutputStream out) {

this.out = out;

}

public DataInputStream getIn() {

return in;

}

public void setIn(DataInputStream in) {

this.in = in;

}

}

2、AndroidMainifest.xml中application的配置：

package="com.login"

android:versionCode="1"

android:versionName="1.0" >

android:minSdkVersion="10"

android:targetSdkVersion="15" />

android:name="com.util.ApplicationUtil"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

android:name=".LoginActivity"

android:label="@string/title_activity_main" >

3、LoginActivity类：

import java.io.BufferedWriter;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import https://www.360docs.net/doc/409720617.html,.Socket;

import https://www.360docs.net/doc/409720617.html,.UnknownHostException;

import com.login.R;

import com.util.ApplicationUtil;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class LoginActivity extends Activity{

private EditText usernameT;

private EditText passwordT;

private Button loginButton;

private Socket socket;

private DataOutputStream out;

private DataInputStream in;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(https://www.360docs.net/doc/409720617.html,yout.login);

usernameT = (EditText) findViewById(https://www.360docs.net/doc/409720617.html,ername);

passwordT = (EditText) findViewById(R.id.password);

loginButton = (Button) findViewById(R.id.login);

loginButton.setOnClickListener(new OnClickListener(){

public void onClick(View v) {

ApplicationUtil appUtil = (ApplicationUtil) LoginActivity.this.getApplication();

try {

appUtil.init();

Socket socket = appUtil.getSocket();

out = appUtil.getOut();

in = appUtil.getIn();

} catch (IOException e1) {

e1.printStackTrace();

} catch (Exception e1) {

e1.printStackTrace();

}

String username = usernameT.getText().toString();

String password = passwordT.getText().toString();

MD5 md5 = new MD5();

String ss = md5.MD5(username+"|"+password);

try {

//发送数据

String str = "[login]|"+ss;

out.writeBytes(str);

out.flush();

System.out.println("str ===> "+str);

//创建一个缓冲字节数

int r = in.available();

while(r==0){

r = in.available();

}

byte[] b = new byte[r];

in.read(b);

String result = new String(b,"utf-8");

System.out.println("result = "+result);

if(result.equals("登陆成功0")){

Intent intent = new Intent();

intent.setClass(LoginActivity.this, MainActivity.class);

startActivity(intent);

}

else

{

Intent intent = new Intent();

intent.setClass(LoginActivity.this, MainActivity.class);

startActivity(intent);

}

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

});

}

}

4、MainActivity类：

import java.io.BufferedReader;

import java.io.DataInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import https://www.360docs.net/doc/409720617.html,.Socket;

import com.image.TestActivity;

import com.login.R;

import com.util.ApplicationUtil;

import android.media.RingtoneManager;

import https://www.360docs.net/doc/409720617.html,.Uri;

import android.os.Bundle;

import android.os.Handler;

import android.os.Looper;

import android.os.Message;

import android.provider.MediaStore.Audio;

import android.app.Activity;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.content.Context;

import android.content.Intent;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity {

private EditText mess;

private Socket socket;

private Handler handler;

private DataInputStream in;

private NotificationManager nm;

private Notification n;

private int messageNotificationID = 0;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(https://www.360docs.net/doc/409720617.html,yout.success);

mess = (EditText) findViewById(R.id.message);

ApplicationUtil appUtil = (ApplicationUtil) MainActivity.this.getApplication();

socket = appUtil.getSocket();

in = appUtil.getIn();

handler = new Handler(){

@Override

public void handleMessage(Message msg) {

//如果来自子线程

if(msg.what == 0x123){

mess.append(msg.obj.toString()+"\n");

//消息通知

mynoti();

}

}

};

//调用线程

myThread();

}

//JA V A可以设置读写缓冲区的大小-setReceiveBufferSize(int size), setSendBufferSize(int size)。

public void myThread(){

Thread oneThread = new Thread(new Runnable(){

public boolean isRunning = true;

public void run() {

while(isRunning){

try {

Thread.sleep(1000);

//创建一个缓冲字节数

int r = in.available();

while(r==0){

r = in.available();

}

byte[] b = new byte[r];

in.read(b);

String content = new String(b,"utf-8");

//每当读到来自服务器的数据后，发送消息通知程序页面显示数据

Message msg = new Message();

msg.what = 0x123;

msg.obj = content;

Log.v("ho", content);

handler.sendMessage(msg);

} catch (IOException e) {

e.printStackTrace();

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

});

oneThread.start();

}

public void mynoti(){

NotificationManager mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

// 创建一个通知

Notification mNotification = new Notification();

//用系统自带的铃声

mNotification.sound = Uri.withAppendedPath(Audio.Media.INTERNAL_CONTENT_URI, "6");

// mNotification.sound = Uri.parse("file:///sdcard/wen.mp3");

//mNotification.defaults=Notification.DEFAULT_SOUND;

//Notification.FLAG_INSISTENT; //让声音、振动无限循环，直到用户响应

//Notification.FLAG_AUTO_CANCEL; //通知被点击后，自动消失

//Notification.FLAG_NO_CLEAR; //点击'Clear'时，不清楚该通知(QQ的通知无法清除，就是用的这个)

mNotification.flags = Notification.FLAG_NO_CLEAR; ;

//通知时发出的振动

//第一个参数: 振动前等待的时间

//第二个参数：第一次振动的时长、以此类推

long[] vir = {0,100,200,300};

mNotification.vibrate = vir;

mNotificationManager.notify(messageNotificationID, mNotification);

messageNotificationID++;

}

}

5、MD5类：

import java.security.MessageDigest;

public class MD5 {

// MD5加码。32位

public static String MD5(String inStr) {

MessageDigest md5 = null;

try {

md5 = MessageDigest.getInstance("MD5");

} catch (Exception e) {

System.out.println(e.toString());

e.printStackTrace();

return "";

}

char[] charArray = inStr.toCharArray();

byte[] byteArray = new byte[charArray.length];

for (int i = 0; i < charArray.length; i++)

byteArray[i] = (byte) charArray[i];

byte[] md5Bytes = md5.digest(byteArray);

StringBuffer hexValue = new StringBuffer();

for (int i = 0; i < md5Bytes.length; i++) {

int val = ((int) md5Bytes[i]) & 0xff;

if (val < 16)

hexValue.append("0");

hexValue.append(Integer.toHexString(val));

}

return hexValue.toString();

}

}

6、login.xml：

xmlns:tools="https://www.360docs.net/doc/409720617.html,/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

android:layout_width="fill_parent"

android:layout_height="wrap_content"

>

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="账号："

/>

android:id="@+id/username"

android:layout_width="200dp"

android:layout_height="wrap_content"

android:layout_marginLeft="10dp"

android:layout_marginTop="10dp"

android:layout_marginRight="10dp"

android:hint="账号"

/>

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="密码："

/>

android:id="@+id/password"

android:password="true"

android:layout_width="200dp"

android:layout_height="wrap_content"

android:layout_marginLeft="10dp"

android:layout_marginTop="10dp"

android:layout_marginRight="10dp"

android:hint="密码"

/>

android:id="@+id/login"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginLeft="10dp"

android:layout_marginTop="10dp"

android:layout_marginRight="10dp"

android:text="登录"

/>

7、success.xml

xmlns:tools="https://www.360docs.net/doc/409720617.html,/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

android:id="@+id/success"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="不断接受信息，并提示"

/>

android:id="@+id/message"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:cursorVisible="false"

/>