windows与android互联网,android的互联网开发上-优快云博客

二、URL、UrlConnection网络编程介绍

三、HTTP网络编程介绍

四、 Web Service网络编程介绍

五、 android WebView网络编程介绍

实例代码-----------------------------------------------

服务器端模拟

MyServer.java

package com.amaker.socket;

import java.io.IOException;

import java.io.OutputStream;

import java.net.ServerSocket;

import java.net.Socket;

/**

* Socket 服务器，向客户端写Hello Android!

public class MyServer {

public static void main(String[] args) {

try {

ServerSocketserver=newServerSocket(8888);

while(true){

Socketclient=server.accept();

OutputStreamout=client.getOutputStream();

Stringmsg="Hello Android!";

out.write(msg.getBytes());

client.close();

}

} catch (IOException e) {

e.printStackTrace();

}

LoginServlet.java

package com.amaker.http;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

* 响应登录Servlet

public class LoginServlet extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

Stringusername=request.getParameter("username");

Stringpassword=request.getParameter("password");

System.out.println(username+":"+password);

response.setContentType("text/html");

response.setCharacterEncoding("utf-8");

PrintWriterout=response.getWriter();

Stringmsg=null;

if(username!=null&&username.equals("admin")&&password!=null&&password.equals("1")){

msg="登录成功!";

}else{

msg="登录失败!";

}

out.print(msg);

out.flush();

out.close();

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

doGet(request,response);

}

web.xml

xmlns="http://java.sun.com/xml/ns/j2ee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

LoginServlet

com.amaker.http.LoginServlet

LoginServlet

/servlet/LoginServlet

android客户端

MainActivity.java

package com.amaker.ch13;

import android.app.ListActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import com.amaker.ch13.http.LoginActivity;

import com.amaker.ch13.socket.TestSocketActivity;

import com.amaker.ch13.url.TestURLActivity;

import com.amaker.ch13.webservice.TestWebServiceActivity;

import com.amaker.ch13.webservice.WeatherActivity;

import com.amaker.ch13.webview.TestWebViewActivity;

public class MainActivity extends ListActivity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// 菜单项数组

String[]items= {"测试 Socket","测试URL、UrlConnection","测试 HTTP","测试 Web Service","天气预报","Test WebView"};

// 将菜单项数组设置为ListView的列表项展示

setListAdapter(new ArrayAdapter(this,

android.R.layout.simple_list_item_1, items));

getListView().setTextFilterEnabled(true);

}

// 响应菜单项的单击事件

protected void onListItemClick(ListView l, View v, int position, long id) {

Intentintent=null;

switch (position) {

case 0:

intent=newIntent(MainActivity.this,TestSocketActivity.class);

startActivity(intent);

break;

case 1:

intent=newIntent(MainActivity.this,TestURLActivity.class);

startActivity(intent);

break;

case 2:

intent=newIntent(MainActivity.this,LoginActivity.class);

startActivity(intent);

break;

case 3:

intent=newIntent(MainActivity.this,TestWebServiceActivity.class);

startActivity(intent);

break;

case 4:

intent=newIntent(MainActivity.this,WeatherActivity.class);

startActivity(intent);

break;

case 5:

intent=newIntent(MainActivity.this,TestWebViewActivity.class);

startActivity(intent);

break;

}

AndroidManifest.xml

package="com.amaker.ch13"

android:versionCode="1"

android:versionName="1.0">

android:label="@string/app_name">

一、socket编程

TestSocketActivity.java

代码

package com.amaker.ch13.socket;

import java.io.IOException;

import java.io.InputStream;

import java.net.Socket;

import java.net.UnknownHostException;

import android.app.Activity;

import android.os.Bundle;

import android.widget.TextView;

import com.amaker.ch13.R;

/**

* Android　Socket 客户端接收服务器信息

public class TestSocketActivity extends Activity {

private TextView myTextView;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.socket);

myTextView= (TextView)findViewById(R.id.msgTextView01);

try {

Socketsocket=newSocket("192.168.1.101",8888);

InputStreamin=socket.getInputStream();

byte[]buffer=newbyte[in.available()];

in.read(buffer);

Stringmsg=newString(buffer);

myTextView.setText(msg);

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

socket.xml

代码

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:text="等待接收服务器信息..."

android:id="@+id/msgTextView01"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

二、URL、UrlConnection编程

TestURLActivity.java

代码

package com.amaker.ch13.url;

import java.io.InputStream;

import java.net.URL;

import java.net.URLConnection;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.os.Bundle;

import android.widget.ImageView;

import com.amaker.ch13.R;

/**

* 通过URL进行网络连接

public class TestURLActivity extends Activity {

private ImageView p_w_picpathView;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.test_url);

p_w_picpathView= (ImageView)findViewById(R.id.ImageView01);

StringurlStr="http://192.168.1.101:8080/Chapter_13_Networking_server/upload/zs.jpg";

try {

URLurl=newURL(urlStr);

// 1. 直接使用URL获得输入流

//InputStreamin=url.openStream();

// 2. 获得URLconnection

URLConnectionconn=url.openConnection();

InputStreamin=conn.getInputStream();

// 3. 如果是HTTP协议可以使用HttpURLConnection

//HttpURLConnectionhttpConn= (HttpsURLConnection)conn;

//in=httpConn.getInputStream();

Bitmapbm=BitmapFactory.decodeStream(in);

p_w_picpathView.setImageBitmap(bm);

} catch (Exception e) {

e.printStackTrace();

}

test_url.xml

代码

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:id="@+id/ImageView01"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

三、 HTTP编程

LoginActivity.java

代码

package com.amaker.ch13.http;

import java.io.UnsupportedEncodingException;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.protocol.HTTP;

import org.apache.http.util.EntityUtils;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import com.amaker.ch13.R;

public class LoginActivity extends Activity {

* 声明使用到的Button和EditText视图组件

private Button cancelBtn,loginBtn;

private EditText userEditText,pwdEditText;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.http1);

* 实例化视图组件

cancelBtn= (Button)findViewById(R.id.cancelButton);

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

userEditText= (EditText)findViewById(R.id.userEditText);

pwdEditText= (EditText)findViewById(R.id.pwdEditText);

* 设置登录监听器

loginBtn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Stringusername=userEditText.getText().toString();

Stringpwd=pwdEditText.getText().toString();

}

});

* 设置取消监听器

cancelBtn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

finish();

}

});

}

* 定义一个显示提示信息的对话框

private void showDialog(String msg){

AlertDialog.Builderbuilder=newAlertDialog.Builder(this);

builder.setMessage(msg)

.setCancelable(false)

.setPositiveButton("确定", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int id) {

}

});

AlertDialogalert=builder.create();

alert.show();

}

* 通过用户名称和密码进行查询，发送Post请求，获得响应结果。

private void login(String username,String password){

// 1. 使用 HttpURLConnection 实现

/*StringurlStr="http://192.168.1.101:8080/Chapter_13_Networking_server/servlet/LoginServlet?";

StringqueryString="username="+username+"&password="+password;

urlStr+=queryString;

try {

URLurl=newURL(urlStr);

HttpURLConnectionconn= (HttpURLConnection)url.openConnection();

if(conn.getResponseCode()==HttpURLConnection.HTTP_OK){

InputStreamin=conn.getInputStream();

byte[]b=newbyte[in.available()];

in.read(b);

Stringmsg=newString(b);

showDialog(msg);

in.close();

}

conn.disconnect();

} catch (Exception e) {

showDialog(e.getMessage());

}*/

// 2. 使用 Apache HTTP 客户端实现

StringurlStr="http://192.168.1.101:8080/Chapter_13_Networking_server/servlet/LoginServlet";

HttpPostrequest=newHttpPost(urlStr);

// 如果传递参数个数比较多的话，我们可以对传递的参数进行封装

Listparams=newArrayList();

params.add(new BasicNameValuePair("username", username));

params.add(new BasicNameValuePair("password", password));

try {

request.setEntity( new UrlEncodedFormEntity(params,HTTP.UTF_8));

HttpResponseresponse=newDefaultHttpClient().execute(request);

if(response.getStatusLine().getStatusCode()==200){

Stringmsg=EntityUtils.toString(response.getEntity());

showDialog(msg);

}

} catch (Exception e) {

e.printStackTrace();

}

windows与android互联网,android的互联网开发 上

windows与android互联网,android的互联网开发上