鉴于自己的痛苦,研究一个socket在多个界面切换时保持链接的问题,令我纠结很久,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 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><!-- 振动需要的权限 --><uses-permission android:name="android.permission.VIBRATE"/><!-- 声明网络权限 --><uses-permission android:name="android.permission.INTERNET"/> </manifest>
2、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 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 {//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();}}});} }
3、MainActivity类:
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();}//JAVA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++;} }
4、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="账号:"/><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="账号"/></TableRow> <TableRow><TextView android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="密码:"/><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="密码"/></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="登录"/></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="不断接受信息,并提示"/><EditText android:id="@+id/message"android:layout_width="fill_parent"android:layout_height="wrap_content"android:cursorVisible="false"/></LinearLayout>
以上都是客户端,服务端就自己写,socket代码差不多。