下载一个网站的字符串(Downloading a website to a string)

已经做了一些基本教程，我开始做我的第一款真正的Android应用程序在月食。我想这个应用程序，以检查是否在一个EditText中的文本相匹配的网站上（这一个： http://www.augustinianum.eu/roosterwijzigingen/14062012.pdf （它包含了我的学校的日程安排变化））。我已经发现了如何使应用程序检查，如果在EditText上的文本字符串匹配（该方法包括（）），所以现在我需要做的唯一的事情是所有网站的文本下载到串。但我不知道怎么样。或者是有可能，我可以与如果网站包含某个词，而无需下载网站的文本字符串检查的方法。

谢谢！

（顺便说一句，我不是英语，所以PLZ原谅我，如果我做了一些语言相关的错误。）

@androider我不能在评论栏中发表我的代码，所以在这里，它是：

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();
        }
    }
  }
}

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" >

Answer 1:

你可以使用InputStream的读者这样的文字。

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) {
}

此外，在您的应用程序清单文件添加额外的权限：

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

// ============================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();
        }