Java Android htmlcleaning

我使用此代码读取html页面，但我有一个错误…我如何解决这个问题

错误：

FATAL EXCEPTION: main
Process: com.example.nuovo, PID: 1615
 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.nuovo/com.example.nuovo.Nuovo_Activity}: android.os.NetworkOnMainThreadException
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
    at android.app.ActivityThread.access$800(ActivityThread.java:135)

代码：

package com.example.nuovo;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import org.htmlcleaner.CleanerProperties;
import org.htmlcleaner.HtmlCleaner;
import org.htmlcleaner.TagNode;
import org.htmlcleaner.XPatherException;

import android.util.Log;

public class test {

     public String getRis() throws MalformedURLException, IOException, XPatherException{
          String result="aa";

          Log.d("prova di funzionamento","test");

          CleanerProperties props = new CleanerProperties();

 // set some properties to non-default values
  props.setTranslateSpecialEntities(true);
  props.setTransResCharsToNCR(true);
  props.setOmitComments(true);

  URL url=new URL("https...........aspx");
  Log.d("prova di funzionamentoPost1","test");
 // do parsing
  TagNode tagNode = new HtmlCleaner(props).clean(url);

  Log.d("prova di funzionamentoPost2","test");
Object[] nodes = tagNode.evaluateXPath("//table[@class='TableQuotazioni']");


 TagNode node = (TagNode)nodes[0];

 nodes = node.evaluateXPath("//td");

 Log.d("prova di funzionamento2","test");

 for (int i = 1; i < nodes.length; i++) {

     String ris= (((TagNode)nodes[i]).getText()).toString();

 result=ris;

 }
 return result;

     }

}

---

在Android中，您不能在主线程中使用internet，这就是为什么会出现NetworkOnMainThreadException。使用AsyncTask以使用网络。下面是AsyncTask类的一个简单示例

 class MyAsyncTask extends AsyncTask<Void, Void, Void>    {


    myAsyncTask()    {
    }

    // Executed on the UI thread before the
    // time taking task begins
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    // Executed on a special thread and all your
    // time taking tasks should be inside this method
    @Override
    protected Void doInBackground(Void... arg0) {
        // Put your work with network here
        return null;
    }

    // Executed on the UI thread after the
    // time taking process is completed
    @Override
    protected void onPostExecute(Void result) {
        //Update your views here
        super.onPostExecute(result);
    }
}   }

---

添加PermitNetworks.Class

import android.os.StrictMode;

public class PermitNetworks {
    public static final void networkAllPermit() {
         if (android.os.Build.VERSION.SDK_INT > 9) {
         StrictMode.ThreadPolicy policy = new
         StrictMode.ThreadPolicy.Builder()
         .permitAll().build();
         StrictMode.setThreadPolicy(policy);
         }
    }
}

然后添加以上所有表示http连接的代码

PermitNetworks.networkAllPermit();

我希望你能从中得到解决

PermitNetworks.networkAllPermit();