Android 网络图片查看器与网页源码查看器

package com.hb.neting;

import java.io.inputstream;
import java.net.httpurlconnection;
import java.net.url;

import android.annotation.suppresslint;
import android.app.activity;
import android.graphics.bitmap;
import android.graphics.bitmapfactory;
import android.os.bundle;
import android.text.textutils;
import android.view.view;
import android.widget.edittext;
import android.widget.imageview;
import android.widget.toast;

public class mainactivity extends activity {
 private imageview iv_show;
 private edittext et_input;
 private string path;
 private int code;
 private httpurlconnection conn;
 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_main);
 iv_show=(imageview) findviewbyid(r.id.iv_show);
 et_input=(edittext) findviewbyid(r.id.et_inpput);
 }
 @suppresslint("showtoast") public void chakan(view view){
 path = et_input.gettext().tostring().trim();
 if (textutils.isempty(path)) {
 toast.maketext(mainactivity.this, "不能输入空的", 0).show();
 return;
 }
 new thread(){
 public void run() {
 try {
  url url = new url(path);
  conn = (httpurlconnection) url.openconnection();
  conn.setrequestmethod("get");
  conn.setconnecttimeout(5000);
  code = conn.getresponsecode();
  if(code==200){
  inputstream in = conn.getinputstream();
  //解析图片
  final bitmap stream = bitmapfactory.decodestream(in);
  runonuithread(new runnable() {
  public void run() {
  //更新ui
  iv_show.setimagebitmap(stream);
  }
  });
  in.close();
  }
 } catch (exception e) {
  e.printstacktrace();
 }
 };
 }.start();
 }
}

<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" >

 <edittext
 android:id="@+id/et_inpput"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:hint="请输入获取图片的地址：" />
 <button 
 android:id="@+id/bt_read"
 android:onclick="chakan"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:text="查看"
 />
 <imageview
 android:id="@+id/iv_show"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 />
</linearlayout>

package com.hb.network;

import java.io.inputstream;
import java.net.httpurlconnection;
import java.net.url;

import android.annotation.suppresslint;
import android.app.activity;
import android.os.bundle;
import android.os.handler;
import android.os.message;
import android.text.textutils;
import android.view.view;
import android.widget.edittext;
import android.widget.textview;
import android.widget.toast;

import com.hb.utils.readstreamutils;

public class mainactivity extends activity {
 protected static final int sucess = 0;
 protected static final int eorr = 1;
 private textview tv_show; 
 private edittext et_input;
 private url url;
 private string path;
 @suppresslint("handlerleak") 
 private handler handler=new handler(){
 public void handlemessage(android.os.message msg) {
 switch (msg.what) {
 case sucess:
 string content=(string) msg.obj;
 tv_show.settext(content);
 break;

 case eorr:
 toast.maketext(mainactivity.this,"查看源码失败" , 0).show();
 break;
 }
 };
 };
 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_main);
 tv_show=(textview) findviewbyid(r.id.tv_show);
 et_input=(edittext) findviewbyid(r.id.et_input);

 }
 public void onclick(view view){
 path = et_input.gettext().tostring().trim();
 if(textutils.isempty(path)){
 return;
 }new thread(){
 public void run() {
 try {
  url = new url(path);
  //判断从edittext获取的数据否为空
  if(textutils.isempty(path)){
  return;
  }
  httpurlconnection conn = (httpurlconnection) url.openconnection();
  conn.setconnecttimeout(3000);
  conn.setrequestmethod("get");
  int code = conn.getresponsecode();
  if(code == 200){
  inputstream is= conn.getinputstream();
  string content = readstreamutils.read(is);
  message msg = new message();
  msg.what=sucess;
  msg.obj=content;
  handler.sendmessage(msg);
  }
 } catch (exception e) {
  e.printstacktrace();
  message msg = new message();
  msg.what=eorr;
  handler.sendmessage(msg);
 }
 };
 }.start();
 }
}

package com.hb.utils;

import java.io.bytearrayoutputstream;
import java.io.ioexception;
import java.io.inputstream;

public class readstreamutils {
/**
 * 读取流的输入
 * @param is
 * @return
 * @throws ioexception
 */
 public static string read(inputstream is) throws ioexception{
 bytearrayoutputstream bos = new bytearrayoutputstream();
 int len;
 byte [] buffer=new byte[1024];
 while((len=is.read(buffer))!=-1){
 bos.write(buffer,0,len);
 }
 is.close();
 bos.close();
 string temp = bos.tostring();
 if(temp.contains("charset=utf-8")){
 return bos.tostring("utf-8");
 }else if(temp.contains("charset=iso-8859-1")){
 return bos.tostring("iso-8859-1");
 }
 return null;

 }
}

<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"
 tools:context="${relativepackage}.${activityclass}" >

 <edittext
 android:id="@+id/et_input"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:hint="请输入要查看源码的网址：" />

 <button
 android:onclick="onclick"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:text="查看"
 android:textsize="25sp" />

 <scrollview
 android:layout_width="match_parent"
 android:layout_height="match_parent" >

 <textview
 android:id="@+id/tv_show"
 android:layout_width="match_parent"
 android:layout_height="match_parent" />
 </scrollview>
</linearlayout>