鑒于自己的痛苦，研究一個socket在多個界面切換時保持鏈接的問題，令我糾結很久，現在我提供客戶端的源碼給有需要的人參考。

1、ApplicationUtil類：

import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.Socket; import java.net.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;}}

AndroidMainifest.xml中application的配置：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.login"android:versionCode="1"android:versionName="1.0" ><uses-sdkandroid:minSdkVersion="10"android:targetSdkVersion="15" /><applicationandroid:name="com.util.ApplicationUtil"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><activityandroid:name=".LoginActivity"android:label="@string/title_activity_main" ><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activity android:name=".MainActivity"/></application><!-- 振動需要的權限 --><uses-permission android:name="android.permission.VIBRATE"/><!-- 聲明網絡權限 --><uses-permission android:name="android.permission.INTERNET"/> </manifest>

2、LoginActivity類：

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 java.net.Socket; import java.net.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;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.login);usernameT = (EditText) findViewById(R.id.username);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 {//發送數據String str = "[login]|"+ss;out.writeBytes(str);out.flush();System.out.println("str ===> "+str);//創建一個緩沖字節數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("登陸成功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();}}});} }

3、MainActivity類：

import java.io.BufferedReader; import java.io.DataInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.net.Socket;import com.image.TestActivity; import com.login.R; import com.util.ApplicationUtil;import android.media.RingtoneManager; import android.net.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;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.success);mess = (EditText) findViewById(R.id.message);ApplicationUtil appUtil = (ApplicationUtil) MainActivity.this.getApplication();socket = appUtil.getSocket();in = appUtil.getIn();handler = new Handler(){@Overridepublic void handleMessage(Message msg) {//如果來自子線程if(msg.what == 0x123){mess.append(msg.obj.toString()+"\n");//消息通知 mynoti();}}};//調用線程 myThread();}//JAVA可以設置讀寫緩沖區的大小-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);//創建一個緩沖字節數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");//每當讀到來自服務器的數據后，發送消息通知程序頁面顯示數據 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);// 創建一個通知 Notification mNotification = new Notification(); //用系統自帶的鈴聲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; //讓聲音、振動無限循環，直到用戶響應//Notification.FLAG_AUTO_CANCEL; //通知被點擊后，自動消失//Notification.FLAG_NO_CLEAR; //點擊'Clear'時，不清楚該通知(QQ的通知無法清除，就是用的這個)mNotification.flags = Notification.FLAG_NO_CLEAR; ; //通知時發出的振動 //第一個參數: 振動前等待的時間 //第二個參數： 第一次振動的時長、以此類推 long[] vir = {0,100,200,300}; mNotification.vibrate = vir; mNotificationManager.notify(messageNotificationID, mNotification);messageNotificationID++;} }

4、MD5類：

import java.security.MessageDigest;public class MD5 {// MD5加碼。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和success.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent" android:orientation="vertical"><TableLayout android:layout_width="fill_parent"android:layout_height="wrap_content"><TableRow><TextView android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="賬號："/><EditTextandroid: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="賬號"/></TableRow> <TableRow><TextView android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="密碼："/><EditTextandroid: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="密碼"/></TableRow> </TableLayout><Buttonandroid: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="登錄"/></LinearLayout> <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent" android:orientation="vertical"><TextView android:id="@+id/success"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="不斷接受信息，并提示"/><EditText android:id="@+id/message"android:layout_width="fill_parent"android:layout_height="wrap_content"android:cursorVisible="false"/></LinearLayout>

以上都是客戶端，服務端就自己寫，socket代碼差不多。

轉載于:https://www.cnblogs.com/dennytao/p/5351868.html

總結

以上是生活随笔為你收集整理的android客户端在多个界面切换时保持socket的链接的实例的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。