eclipse 将网站下载为字符串
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原文地址: http://stackoverflow.com/questions/11590899/
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StackOverFlow
Downloading a website to a string
提问by Xander
Having done some basic tutorials, I started making my first real android app in eclipse. I want this app to check if the text in an EditText matches the text on a website (this one: http://www.augustinianum.eu/roosterwijzigingen/14062012.pdf(it contains my school's schedule changes)). I've found out how to make the app check if the text in the EditText matches a string (with the method contains()), so now the only thing I need to do is to download all of the text of that website to a string. But I have no idea how to. Or is there maybe a method which I can check with if a website contains a certain word without downloading the website's text to a string.
完成了一些基本教程后，我开始在 eclipse 中制作我的第一个真正的 android 应用程序。我希望这个应用程序检查 EditText 中的文本是否与网站上的文本匹配（这个：http: //www.augustinianum.eu/roosterwijzigingen/14062012.pdf（它包含我学校的时间表变化））。我已经找到了如何让应用程序检查 EditText 中的文本是否与字符串匹配（使用方法 contains()），所以现在我唯一需要做的就是将该网站的所有文本下载到细绳。但我不知道该怎么做。或者是否有一种方法可以检查网站是否包含某个单词，而无需将网站的文本下载为字符串。
Thank You!
谢谢你！
(BTW I'm not English so plz forgive me if I've made some language-related mistakes.)
（顺便说一句，我不是英语，所以如果我犯了一些与语言相关的错误，请原谅我。）
@androider I can't post my code in the comment box so here it is:
@androider 我不能在评论框中发布我的代码，所以这里是：
package me.moop.mytwitter;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.app.ProgressDialog;
public class MainActivity extends Activity {
Button mBtnCheck;
EditText mEtxtGroup;
ProgressDialog mProgressDialog;
TwitterUser mTwitterUser;
TextView mTxtv1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.nicelayout3);
mBtnCheck = (Button) findViewById(R.id.btnCheck);
mEtxtGroup = (EditText) findViewById(R.id.etxtGroup);
mTxtv1 = (TextView) findViewById(R.id.textView1);
}
public void checkScheduleChange(View view){
if (view == mBtnCheck){
String group;
group = mEtxtGroup.getText().toString();
if (group.length() > 0){
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Bezig met checken voor roosterwijzigingen...");
mProgressDialog.show();
try
{
URL url = new URL("http://www.augustinianum.eu/roosterwijzigingen/14062012.pdf");
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String str;
while ((str = in.readLine()) != null){
mProgressDialog.dismiss();
if(str.contains(mEtxtGroup.getText().toString())){
Toast.makeText(this, "U hebt een roosterwijziging.", Toast.LENGTH_LONG).show();
}
else{
Toast.makeText(this, "U hebt geen roosterwijzigingen", Toast.LENGTH_LONG).show();
}
}
in.close();
} catch (MalformedURLException e) {
Toast.makeText(this, "Er is een fout opgetreden, probeer opniew.", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(this, "Er is een fout opgetreden, probeer opniew.", Toast.LENGTH_LONG).show();
}
}
else{
Toast.makeText(this, "Voer een klas in", Toast.LENGTH_LONG).show();
}
}
}
}
Here are the button's properties:
以下是按钮的属性：
<Button
android:id="@+id/btnCheck"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:clickable="true"
android:onClick="checkScheduleChange"
android:text="Check" >
采纳答案by Haresh Chaudhary
You can get the text using InputStream Reader like this.
您可以像这样使用 InputStream Reader 获取文本。
try
{
URL url = new URL("http://yourwebpage.com");
// Read all the text returned by the server
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String str;
while ((str = in.readLine()) != null)
{
// str is one line of text; readLine() strips the newline character(s)
// You can use the contain method here.
if(str.contains(editText.getText().toString))
{
You can perform your logic here!!!!!
}
}
in.close();
} catch (MalformedURLException e) {
} catch (IOException e) {
}
Also add an additional permission in your apps Manifest file:
还要在您的应用清单文件中添加额外的权限：
<uses-permission android:name="android.permission.INTERNET/>
//============================EDIT================================//
//============================编辑================== ==============//
if (group.length() > 0)
{
mProgressDialog = new ProgressDialog(this);
mProgressDialog.setMessage("Bezig met checken voor roosterwijzigingen...");
mProgressDialog.show();
try
{
URL url = new URL("http://www.augustinianum.eu/roosterwijzigingen/14062012.pdf");
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String str;
while ((str = in.readLine()) != null){
if(str.contains(mEtxtGroup.getText().toString())){
if(mProgressDialog.isShowing())
{
mProgressDialog.dismiss();
}
Toast.makeText(this, "U hebt een roosterwijziging.", Toast.LENGTH_LONG).show();
break;
}
}
in.close();
} catch (MalformedURLException e) {
Toast.makeText(this, "Er is een fout opgetreden, probeer opniew.", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(this, "Er is een fout opgetreden, probeer opniew.", Toast.LENGTH_LONG).show();
}
if(mProgressDialog.isShowing())
{
mProgressDialog.dismiss();
}
}
else{
Toast.makeText(this, "Voer een klas in", Toast.LENGTH_LONG).show();
}
回答by trevor-e
This is a good related Java question: How do you Programmatically Download a Webpage in Java
这是一个很好的 Java 相关问题：How do you Programmatically Download a Webpage in Java
You can then implement whatever method you choose into your app. One thing to note is that you will need to enable the INTERNETpermission on your app in order to access the internet.
然后，您可以在应用程序中实现您选择的任何方法。需要注意的一件事是，您需要启用INTERNET应用程序的权限才能访问互联网。
