Android Web Service 教程

在安卓中創建Web服務應用并不是一項困難的任務。愛掏網 - it200.com我們可以輕松地創建一個Restful Web服務應用，用于在安卓中驗證或將信息保存到外部數據庫，比如Oracle、MySQL、PostgreSQL、SQL Server，這些數據庫是使用Java、.Net、PHP等語言開發的應用程序。愛掏網 - it200.com這就是我們要做的。愛掏網 - it200.com

在開發Web服務應用之前，你必須對SOAP和Restful Web服務有基本的了解。愛掏網 - it200.com因此，我們將討論關于Web服務的基本知識，例如什么是Web服務以及關于SOAP和Restful Web服務的簡要信息。愛掏網 - it200.com

什么是Web服務？

Web服務是在不考慮語言和平臺的情況下，不同類型應用程序之間交換信息的標準。愛掏網 - it200.com例如，安卓應用程序可以通過Web服務與Java或.Net應用程序進行交互。愛掏網 - it200.com

安卓Restful Web服務示例

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:hint="Username"
        android:ems="10" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="67dp"
        android:ems="10"
        android:hint="Password"
        android:inputType="textPassword" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="24dp"
        android:layout_toRightOf="@+id/button1"
        android:text="New User" />

    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/editText2"
        android:layout_marginTop="22dp" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText2"
        android:layout_below="@+id/progressBar1"
        android:layout_marginLeft="22dp"
        android:text="Login" />

</RelativeLayout>

文件：activity_register_user.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="15dp"
        android:ems="10"
        android:hint="Enter UserName" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="50dp"
        android:ems="10"
        android:hint="Enter Password"
        android:inputType="textPassword" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="Resister" />

    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/editText2"
        android:layout_marginTop="87dp" />

</RelativeLayout>

MainActivity類

package com.example.newrestapi;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
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 android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

public class MainActivity extends Activity {
    EditText password,userName;
    Button login,resister;
    ProgressBar progressBar;



    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        password=(EditText) findViewById(R.id.editText2);
        userName=(EditText) findViewById(R.id.editText1);
        login=(Button) findViewById(R.id.button1);
        resister=(Button) findViewById(R.id.button2);

        //progess_msz.setVisibility(View.GONE);
        progressBar=(ProgressBar) findViewById(R.id.progressBar1);
        progressBar.setVisibility(View.GONE);


        resister.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent  intent=new Intent(MainActivity.this,ResisterUser.class);
                startActivity(intent);
            }
        });
        login.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                progressBar.setVisibility(View.VISIBLE);

                String s1=userName.getText().toString();
                String s2=password.getText().toString();
                new ExecuteTask().execute(s1,s2);

            }
        });


    }

     class ExecuteTask extends AsyncTask<String, Integer, String>
        {

            @Override
            protected String doInBackground(String... params) {

                String res=PostData(params);

                return res;
            }

            @Override
            protected void onPostExecute(String result) {
            progressBar.setVisibility(View.GONE);
            //progess_msz.setVisibility(View.GONE);
            Toast.makeText(getApplicationContext(), result, 3000).show();
            }

        }

    public String PostData(String[] valuse) {
        String s="";
        try
        {
        HttpClient httpClient=new DefaultHttpClient();
        HttpPost httpPost=new HttpPost("http://10.0.0.8:7777/HttpPostServlet/servlet/Login");

        List<NameValuePair> list=new ArrayList<NameValuePair>();
        list.add(new BasicNameValuePair("name", valuse[0]));
        list.add(new BasicNameValuePair("pass",valuse[1]));
        httpPost.setEntity(new UrlEncodedFormEntity(list));
        HttpResponse httpResponse=  httpClient.execute(httpPost);

        HttpEntity httpEntity=httpResponse.getEntity();
        s= readResponse(httpResponse);

        }
        catch(Exception exception)  {}
        return s;


    }
    public String readResponse(HttpResponse res) {
        InputStream is=null; 
        String return_text="";
        try {
            is=res.getEntity().getContent();
            BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(is));
            String line="";
            StringBuffer sb=new StringBuffer();
            while ((line=bufferedReader.readLine())!=null)
            {
            sb.append(line);
            }
            return_text=sb.toString();
        } catch (Exception e)
        {

        }
        return return_text;

    }

}

注冊用戶類

package com.example.newrestapi;

import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
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 android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;

public class ResisterUser extends Activity {
     EditText userName,passwprd;
       Button resister,login;
       ProgressBar progressBar;
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_resister_user);
            userName=(EditText) findViewById(R.id.editText1);;
            passwprd=(EditText) findViewById(R.id.editText2);
            resister=(Button) findViewById(R.id.button1);

            progressBar=(ProgressBar) findViewById(R.id.progressBar1);
            progressBar.setVisibility(View.GONE);

            resister.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {

                    progressBar.setVisibility(View.VISIBLE);

                    String s1=userName.getText().toString();
                    String s2=passwprd.getText().toString();
                    new ExecuteTask().execute(s1,s2);
                }
            });




        }

        class ExecuteTask extends AsyncTask<String, Integer, String>
        {

            @Override
            protected String doInBackground(String... params) {

                PostData(params);
                return null;
            }

            @Override
            protected void onPostExecute(String result) {
            progressBar.setVisibility(View.GONE);
            }

        }



        public void PostData(String[] valuse) {
            try
            {
            HttpClient httpClient=new DefaultHttpClient();
            HttpPost httpPost=new HttpPost(
                                  "http://10.0.0.8:7777/HttpPostServlet/servlet/httpPostServlet");
            List<NameValuePair> list=new ArrayList<NameValuePair>();
            list.add(new BasicNameValuePair("name", valuse[0]));
            list.add(new BasicNameValuePair("pass",valuse[1]));
            httpPost.setEntity(new UrlEncodedFormEntity(list));
            httpClient.execute(httpPost);
            }
            catch(Exception e)
            {
                System.out.println(e);
            }

        }

        }

您需要在AndroidManifest.xml文件中提供INTERNET權限。愛掏網 - it200.com

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.newrestapi"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.newrestapi.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.newrestapi.ResisterUser"
            android:label="@string/title_activity_resister_user" >
        </activity>
    </application>

</manifest>

輸出：

Java Servlet登錄和注冊示例，使用oracle數據庫

在oracle數據庫中創建表javatpoint_user，包含三個列id、name和password。愛掏網 - it200.comid必須是主鍵，并通過SEQUENCE生成。愛掏網 - it200.com

CREATE TABLE  "JAVATPOINT_USER" 
   (    "ID" NUMBER, 
    "NAME" VARCHAR2(4000), 
    "PASSWORD" VARCHAR2(4000), 
     CONSTRAINT "JAVATPOINT_USER_PK" PRIMARY KEY ("ID") ENABLE
   )
/

新建兩個servlet類來登錄和注冊用戶。愛掏網 - it200.com

登錄Servlet類

package server;

import java.io.IOException;
import java.io.ObjectOutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Login extends HttpServlet {


    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
         response.setContentType("text/html");  

            ObjectOutputStream out=new ObjectOutputStream(response.getOutputStream());

            String n=request.getParameter("name");  
            String p=request.getParameter("pass");
            System.out.println(n);
            System.out.println(p);

            if(validate(n, p)){  
               out.writeObject("success");

            }  
            else{  
               out.writeObject("Sorry username or password error");

            }  

            out.close();  
            }  


    public static boolean validate(String name,String pass){  
        boolean status=false;  
        try{  
            Class.forName("oracle.jdbc.driver.OracleDriver");
            Connection con=DriverManager.getConnection(
                      "jdbc:oracle:thin:@localhost:1521:xe","system","oracle");

        PreparedStatement ps=con.prepareStatement(  
        "select * from javatpoint_user where name=? and password=?");  
        ps.setString(1,name);  
        ps.setString(2,pass);  

        ResultSet rs=ps.executeQuery();  
        status=rs.next();  

        }catch(Exception e){System.out.println(e);}  
        return status;  
        }  
    public void doPost(HttpServletRequest request,HttpServletResponse response)
    throws ServletException, IOException {
doGet(request, response);

}
}

httpPostServlet Servlet類

package server;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class httpPostServlet extends HttpServlet {


     public void doGet(HttpServletRequest request,HttpServletResponse response)
     throws ServletException, IOException {
 response.setContentType("text/html");
String recived_data="";


 String s1=request.getParameter("name");
 String s2=request.getParameter("pass");
 System.out.println(s1);
 System.out.println(s2);    

        try
        {
        Class.forName("oracle.jdbc.driver.OracleDriver");
        Connection con=DriverManager.getConnection(
                       "jdbc:oracle:thin:@localhost:1521:xe","system","oracle");
        PreparedStatement ps=con.prepareStatement(
                      "insert into javatpoint_user(name,password) values(?,?)");
        ps.setString(1, s1);
        ps.setString(2,s2);
        ps.executeUpdate();
        con.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }

} 
public void doPost(HttpServletRequest request,HttpServletResponse response)
     throws ServletException, IOException {
 doGet(request, response);
}

}

index.jsp

<form action="servlet/Login">
Name:<input type="text" name="name"/><br/>
Password:<input type="password" name="pass"/><br/>
<input type="submit" value="login"/>
</form>

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亚洲国产爱久久全部精品_日韩有码在线播放_国产欧美在线观看_中文字幕不卡在线观看

Android Web Service 教程含代碼

Android Web Service 教程

什么是Web服務？

安卓Restful Web服務示例

MainActivity類

注冊用戶類

輸出：

Java Servlet登錄和注冊示例，使用oracle數據庫

登錄Servlet類

httpPostServlet Servlet類

index.jsp

微信小程序地圖map詳解及簡單實例

如何實現MySQL中刪除用戶的語句？

如何實現MySQL底層優化：存儲引擎的選擇與性能對比

北京網站開發公司哪家專業?

PHP 如何在XAMPP中運行PHP代碼含代碼

Android Google Map含代碼

Android動畫示例含代碼

亚洲国产爱久久全部精品_日韩有码在线播放_国产欧美在线观看_中文字幕不卡在线观看

Android Web Service 教程含代碼

Android Web Service 教程

什么是Web服務？

安卓Restful Web服務示例

MainActivity類

注冊用戶類

輸出：

Java Servlet登錄和注冊示例，使用oracle數據庫

登錄Servlet類

httpPostServlet Servlet類

index.jsp

微信小程序 地圖map詳解及簡單實例

如何實現MySQL中刪除用戶的語句？

如何實現MySQL底層優化：存儲引擎的選擇與性能對比

北京網站開發公司哪家專業?

PHP 如何在XAMPP中運行PHP代碼含代碼

Android Google Map含代碼

Android動畫示例含代碼

微信小程序地圖map詳解及簡單實例