Android开发之HTTP访问网络

本文实例为大家详细介绍了android开发之http访问网络的相关代码，供大家参考，具体内容如下

代码1：

package com.ywhttpurlconnection;

import android.app.activity;
import android.content.intent;
import android.os.bundle;
import android.view.view;
import android.widget.button;

public class ywhttpurlconnectionactivity extends activity {
 /** called when the activity is first created. */
 
 private button btn1 = null; 
 private button btn2 = null; 
 private button btn3 = null; 
 private button btn4 = null; 
 @override 
 public void oncreate(bundle savedinstancestate) { 
  super.oncreate(savedinstancestate); 
  setcontentview(r.layout.main); 
  //直接获取数据
  btn1 = (button) this.findviewbyid(r.id.button01); 
  //get方式传递
  btn2 = (button) this.findviewbyid(r.id.button02); 
  //post方式传递
  btn3 = (button) this.findviewbyid(r.id.button03);
  //获取图片
  btn4 = (button) this.findviewbyid(r.id.button04);
  
  btn1.setonclicklistener(new button.onclicklistener(){ 
 
   public void onclick(view v) { 
    // todo auto-generated method stub 
    intent intent = new intent(); 
    intent.setclass(ywhttpurlconnectionactivity.this, showdata.class); 
    bundle b = new bundle(); 
    b.putint("id", 1); 
    intent.putextras(b); 
    startactivity(intent); 
   } 
    
  }); 
  btn2.setonclicklistener(new button.onclicklistener(){ 
 
   public void onclick(view v) { 
    // todo auto-generated method stub 
    intent intent = new intent(); 
    intent.setclass(ywhttpurlconnectionactivity.this, showdata.class); 
    bundle b = new bundle(); 
    b.putint("id", 2); 
    intent.putextras(b); 
    startactivity(intent); 
   } 
    
  }); 
  btn3.setonclicklistener(new button.onclicklistener(){ 
 
   public void onclick(view v) { 
    // todo auto-generated method stub 
    intent intent = new intent(); 
    intent.setclass(ywhttpurlconnectionactivity.this, showdata.class); 
    bundle b = new bundle(); 
    b.putint("id", 3); 
    intent.putextras(b); 
    startactivity(intent); 
   } 
    
  }); 
  btn4.setonclicklistener(new button.onclicklistener(){ 
 
   public void onclick(view v) { 
    // todo auto-generated method stub 
    intent intent = new intent(); 
    intent.setclass(ywhttpurlconnectionactivity.this, showdata.class); 
    bundle b = new bundle(); 
    b.putint("id", 4); 
    intent.putextras(b); 
    startactivity(intent); 
   } 
    
  }); 
 } 
}

代码2：

package com.ywhttpurlconnection;

import java.io.bufferedreader;
import java.io.dataoutputstream;
import java.io.ioexception;
import java.io.inputstream;
import java.io.inputstreamreader;
import java.io.outputstream;
import java.net.httpurlconnection;
import java.net.malformedurlexception;
import java.net.url;
import java.net.urlencoder;

import android.app.activity;
import android.content.intent;
import android.graphics.bitmap;
import android.graphics.bitmapfactory;
import android.os.bundle;
import android.util.log;
import android.widget.imageview;
import android.widget.textview;


public class showdata extends activity { 
 private textview tv = null; 
 private imageview iv = null; 
 private bitmap mbitmap = null; 
 @override 
 public void oncreate(bundle savedinstancestate) { 
  super.oncreate(savedinstancestate); 
  setcontentview(r.layout.http); 
  intent intent = this.getintent(); 
  bundle b = intent.getextras(); 
  int id = b.getint("id"); 
  tv = (textview) this.findviewbyid(r.id.textview_http); 
  iv = (imageview) this.findviewbyid(r.id.imageview01); 
  //直接获取数据
  if (id == 1) { 
//   string httpurl = "http://192.168.0.132:8080/android/http.jsp"; 
   string httpurl = "http://www.jb-aptech.com.cn";
   url url = null; 
   try { 
    url = new url(httpurl); 
   } catch (malformedurlexception e) { 
    e.printstacktrace(); 
   } 
   if (url != null) { 
    try { 
     // 打开连接，此处只是创建一个实例，并没有真正的连接 
     httpurlconnection urlconn = (httpurlconnection) url.openconnection();
     // 连接 
     urlconn.connect();
     
     inputstream input = urlconn.getinputstream(); 
     inputstreamreader inputreader = new inputstreamreader(input); 
     bufferedreader reader = new bufferedreader(inputreader); 
     string inputline = null; 
     stringbuffer sb = new stringbuffer(); 
     while ((inputline = reader.readline()) != null) { 
      sb.append(inputline).append("\n"); 
     } 
     reader.close(); 
     inputreader.close(); 
     input.close(); 
     
     urlconn.disconnect(); 
     if(sb !=null){ 
      tv.settext(sb.tostring()); 
     }else{ 
      tv.settext("读取的内容:null"); 
     } 
    } catch (ioexception e) { 
     e.printstacktrace(); 
    } 
   }else{ 
    log.i("tag", "url is null"); 
   } 
   
  }else if(id==2){ 
   //get方式传递
//   string httpurl = "http://192.168.0.132:8080/android/httpreq.jsp?par=hk"; 
   string httpurl = "http://liveat.acewill.cn/liveat/?cmd=1&uid=xiaoming"; 

   url url = null; 
   try { 
    url = new url(httpurl); 
   } catch (malformedurlexception e) { 
    e.printstacktrace(); 
   } 
   if (url != null) { 
    try { 
     httpurlconnection urlconn = (httpurlconnection) url 
       .openconnection();// 打开连接，此处只是创建一个实力，并没有真正的连接 
     urlconn.setdoinput(true); 
     urlconn.setdooutput(true); 
     urlconn.connect();// 连接 
     inputstream input = urlconn.getinputstream(); 
     inputstreamreader inputreader = new inputstreamreader(input); 
     bufferedreader reader = new bufferedreader(inputreader); 
     string inputline = null; 
     stringbuffer sb = new stringbuffer(); 
     while ((inputline = reader.readline()) != null) { 
      sb.append(inputline).append("\n"); 
     } 
     reader.close(); 
     inputreader.close(); 
     input.close(); 
     urlconn.disconnect(); 
     if(sb !=null){ 
      tv.settext(sb.tostring()); 
     }else{ 
      tv.settext("读取的内容:null"); 
     } 
    } catch (ioexception e) { 
     e.printstacktrace(); 
    } 
   }else{ 
    log.i("tag", "url is null"); 
   } 
  }else if(id==3){ 
   //post方式传递
//   string httpurl = "http://192.168.0.132:8080/android/httpreq.jsp"; 
   string httpurl = "http://www.jb-aptech.com.cn"; 

   url url = null; 
   try { 
    url = new url(httpurl); 
   } catch (malformedurlexception e) { 
    e.printstacktrace(); 
   } 
   if (url != null) { 
    try { 
     httpurlconnection urlconn = (httpurlconnection) url 
       .openconnection();// 打开连接，此处只是创建一个实例，并没有真正的连接 
     urlconn.setdoinput(true); 
     urlconn.setdooutput(true); 
     urlconn.setrequestmethod("post"); 
     urlconn.setusecaches(false);//post请求不能使用缓存. 
     urlconn.setinstancefollowredirects(true);//是否自动重定向. 
     urlconn.connect();// 连接 
     outputstream out = urlconn.getoutputstream(); 
     dataoutputstream data = new dataoutputstream(out); 
     data.writebytes("par="+urlencoder.encode("hk", "gbk")); 
     data.flush(); 
     data.close(); 
     out.close(); 
     inputstream input = urlconn.getinputstream(); 
     inputstreamreader inputreader = new inputstreamreader(input); 
     bufferedreader reader = new bufferedreader(inputreader); 
     string inputline = null; 
     stringbuffer sb = new stringbuffer(); 
     while ((inputline = reader.readline()) != null) { 
      sb.append(inputline).append("\n"); 
     } 
     reader.close(); 
     inputreader.close(); 
     input.close(); 
     urlconn.disconnect(); 
     if(sb !=null){ 
      tv.settext(sb.tostring()); 
     }else{ 
      tv.settext("读取的内容:null"); 
     } 
    } catch (ioexception e) { 
     e.printstacktrace(); 
    } 
   }else{ 
    log.i("tag", "url is null"); 
   } 
  }else if(id==4){ 
   
   string httpurl = "http://www.google.com.hk/intl/zh-cn/images/logo_cn.gif"; 
   url url = null; 
   try { 
    url = new url(httpurl); 
   } catch (malformedurlexception e) { 
    e.printstacktrace(); 
   } 
   if (url != null) { 
    try { 
     // 打开连接，此处只是创建一个实例，并没有真正的连接 
     httpurlconnection urlconn = (httpurlconnection) url.openconnection();
     urlconn.connect();// 连接 
     inputstream input = urlconn.getinputstream(); 
     mbitmap = bitmapfactory.decodestream(input); 
     if(mbitmap != null){ 
      iv.setimagebitmap(mbitmap); 
     } 
    } catch (ioexception e) { 
     e.printstacktrace(); 
    } 
   }else{ 
    log.i("tag", "url is null"); 
   } 
  } 
 } 
} 

代码3：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.ywhttpurlconnection"
 android:versioncode="1"
 android:versionname="1.0" >

 <uses-sdk android:minsdkversion="10" />
 <uses-permission android:name="android.permission.internet"/>
 <application
  android:icon="@drawable/ic_launcher"
  android:label="@string/app_name" >
  <activity
   android:label="@string/app_name"
   android:name=".ywhttpurlconnectionactivity" >
   <intent-filter >
    <action android:name="android.intent.action.main" />

    <category android:name="android.intent.category.launcher" />
   </intent-filter>
  </activity>
   <activity android:name=".showdata"></activity> 
 </application>

</manifest>

代码4：http.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical" >

 <textview
  android:id="@+id/textview_http"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  />
  <imageview
  android:id="@+id/imageview01"
  android:layout_width="172dp"
  android:layout_height="307dp" >

 </imageview>

</linearlayout>

代码5.mail.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical" >

 <textview
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/hello" />
  
  <button android:text="直接获取数据" android:id="@+id/button01" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content"> 
 </button> 
 <button android:text="get方式传递" android:id="@+id/button02" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content"> 
 </button> 
 <button android:text="post方式传递" android:id="@+id/button03" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content"> 
 </button> 
 <button android:text="获取图片" android:id="@+id/button04" 
  android:layout_width="fill_parent" 
  android:layout_height="wrap_content"> 
 </button> 

</linearlayout>

6.运行结果  

 

 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。