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Editorial Team
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Asked: 2026-06-15T15:24:38+00:00

package com.nicotera.colton.londontransitguide; import java.io.IOException; import java.text.DecimalFormat; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.jsoup.*; import org.jsoup.nodes.Attributes;

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    package com.nicotera.colton.londontransitguide;

import java.io.IOException;
import java.text.DecimalFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.jsoup.*;
import org.jsoup.nodes.Attributes;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class RoutesActivity extends Activity implements OnItemSelectedListener {
    private static final String TAG = "RoutesActivity";

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_routes);

        Spinner spinner = (Spinner) findViewById(R.id.route_name_spinner); // Create an ArrayAdapter using the string array and a default spinner layout
        spinner.setOnItemSelectedListener(this);
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.routes_array, android.R.layout.simple_spinner_item);
        // Specify the layout to use when the list of choices appears
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // Apply the adapter to the spinner
        spinner.setAdapter(adapter);
        Log.i(TAG, "spinner populated");
    }

    public void onItemSelected(AdapterView<?> parent, View view, 
            int pos, long id) {
        Log.i(TAG, "Item selected");
        int tempPos = pos;
        Log.i(TAG, ("Position of selected item: " + tempPos));
        int routeSelected;
        if (tempPos < 17)
            routeSelected = (tempPos + 1);
        else if (tempPos >= 17 && tempPos < 29)
            routeSelected = (tempPos + 2);
        else
            routeSelected = (tempPos + 3);
        String temp;
        if (routeSelected < 10)
            temp = ("0") + routeSelected;
        else
            temp = ("") + routeSelected;
        String url = "http://www.ltconline.ca/WebWatch/MobileAda.aspx?r=" + temp;
        try {
            urlParse(url);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    public void urlParse (String url) throws IOException {
        Log.i(TAG, "Tried to parse url");
        String [] directions = new String [3];
        String [] directionNames = new String [3];
        Pattern routeDirPattern = Pattern.compile("\\&d=(\\d{1,2})");
        Connection conn = Jsoup.connect(url);
        /*LINE 82 */ Document doc = conn.get();
        int i = 0;
        Elements routeLinks = doc.select("a[href]");
        for (Element routeLink : routeLinks) {
            i = (i + 1);
            String name = routeLink.text();
            Attributes attrs = routeLink.attributes();
            String href = attrs.get("href");
            Matcher m = routeDirPattern.matcher(href);
            if (m.find()) {
                    String number = m.group(1);
                    directions [i] = number;
                    directionNames [i] = name;
                    Log.i(TAG, directionNames [i]);
            }
        }

    }


    public void onNothingSelected(AdapterView<?> parent) {
        // Another interface callback
    }
}

Apologies for the long code, but I figured I should just post it all so I don’t have to post it later. What is happening is the urlParse method is not working, specifically on line 82 (Not exactly line 82 since I deleted some comments before posting). Does anybody see what the issue is?

LogCat Posted below:

12-08 20:39:38.384: I/RoutesActivity(765): Item selected
12-08 20:39:38.384: I/RoutesActivity(765): Position of selected item: 0
12-08 20:39:38.394: I/RoutesActivity(765): Tried to parse url
12-08 20:39:38.454: D/AndroidRuntime(765): Shutting down VM
12-08 20:39:38.484: W/dalvikvm(765): threadid=1: thread exiting with uncaught exception (group=0x40a70930)
12-08 20:39:38.505: E/AndroidRuntime(765): FATAL EXCEPTION: main
12-08 20:39:38.505: E/AndroidRuntime(765): android.os.NetworkOnMainThreadException
12-08 20:39:38.505: E/AndroidRuntime(765):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
12-08 20:39:38.505: E/AndroidRuntime(765):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
12-08 20:39:38.505: E/AndroidRuntime(765):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
12-08 20:39:38.505: E/AndroidRuntime(765):  at java.net.InetAddress.getAllByName(InetAddress.java:214)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpEngine.connect(HttpEngine.java:311)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
12-08 20:39:38.505: E/AndroidRuntime(765):  at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:81)
12-08 20:39:38.505: E/AndroidRuntime(765):  at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:408)
12-08 20:39:38.505: E/AndroidRuntime(765):  at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:393)
12-08 20:39:38.505: E/AndroidRuntime(765):  at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:159)
12-08 20:39:38.505: E/AndroidRuntime(765):  at org.jsoup.helper.HttpConnection.get(HttpConnection.java:148)
12-08 20:39:38.505: E/AndroidRuntime(765):  at com.nicotera.colton.londontransitguide.RoutesActivity.urlParse(RoutesActivity.java:82)
12-08 20:39:38.505: E/AndroidRuntime(765):  at com.nicotera.colton.londontransitguide.RoutesActivity.onItemSelected(RoutesActivity.java:62)
12-08 20:39:38.505: E/AndroidRuntime(765):  at android.widget.AdapterView.fireOnSelected(AdapterView.java:892)
12-08 20:39:38.505: E/AndroidRuntime(765):  at android.widget.AdapterView.access$200(AdapterView.java:49)
12-08 20:39:38.505: E/AndroidRuntime(765):  at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:860)
12-08 20:39:38.505: E/AndroidRuntime(765):  at android.os.Handler.handleCallback(Handler.java:725)
12-08 20:39:38.505: E/AndroidRuntime(765):  at android.os.Handler.dispatchMessage(Handler.java:92)
12-08 20:39:38.505: E/AndroidRuntime(765):  at android.os.Looper.loop(Looper.java:137)
12-08 20:39:38.505: E/AndroidRuntime(765):  at android.app.ActivityThread.main(ActivityThread.java:5039)
12-08 20:39:38.505: E/AndroidRuntime(765):  at java.lang.reflect.Method.invokeNative(Native Method)
12-08 20:39:38.505: E/AndroidRuntime(765):  at java.lang.reflect.Method.invoke(Method.java:511)
12-08 20:39:38.505: E/AndroidRuntime(765):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-08 20:39:38.505: E/AndroidRuntime(765):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-08 20:39:38.505: E/AndroidRuntime(765):  at dalvik.system.NativeStart.main(Native Method)
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1 Answer

  1. Editorial Team

    This question arises on Stack Overflow almost every two days.
    It is because you cannot touch network from main thread.
    See my answer at

    Unfortunately, Msger has stopped. FATAL Exception: main

    Create a new class inside your RoutesActivity as

    public class RoutesActivity extends Activity{



........ blah blah



private class MyInnerClass extends AsyncTask<String, Void, String> {

  String [] directions = new String [3];
  String [] directionNames = new String [3];     

   @Override
   protected void onPreExecute() {
   super.onPreExecute();

   }

   @Override
   protected String doInBackground(String... params) {
    try{
    Pattern routeDirPattern = Pattern.compile("\\&d=(\\d{1,2})");
    Connection conn = Jsoup.connect(params[0]);
    Document doc = conn.get();
    int i = 0;
    Elements routeLinks = doc.select("a[href]");
    for (Element routeLink : routeLinks) {
        i = (i + 1);
        String name = routeLink.text();
        Attributes attrs = routeLink.attributes();
        String href = attrs.get("href");
        Matcher m = routeDirPattern.matcher(href);
        if (m.find()) {
                String number = m.group(1);
                directions [i] = number;
                directionNames [i] = name;
                Log.i(TAG, directionNames [i]);
        }
    }
    }catch(Exception e){Log.d("doinbackground exception", e.toString());}
   return "Done";
   }

   @Override
   protected void onPostExecute(String result) {
   super.onPostExecute(result);
   // do whatever you wana do with directions[] and directionNames[] here
   }
}
}

    Change the following

    try {
        urlParse(url);
} catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
}

    to 

    new MyInnerClass().execute(url);
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