Host Is Unresolved - Basic Application (No Proxy)

nichojo · by **nichojo** » Wed Oct 08, 2008 12:01 am

This code:

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Using java Syntax Highlighting

package com.android.weatherapp;
 
import java.net.URL;
 
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
 
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
 
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
 
public class weatherapp extends Activity {
    
    private final String MY_DEBUG_TAG = "AUWeather"; 
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        /* Create a new TextView to display the parsing result later. */
        TextView tv = new TextView(this);
        try
        {
            /* Create a URL we want to load some xml-data from. */
            String queryString = "http://weather.yahooapis.com/forecastrss?p=36832";
            /* Replace blanks with HTML-Equivalent. */
            URL url = new URL(queryString.replace(" ", "%20")); 
            
            /* Get a SAXParser from the SAXPArserFactory. */
            SAXParserFactory spf = SAXParserFactory.newInstance();
            SAXParser sp = spf.newSAXParser();
 
            /* Get the XMLReader of the SAXParser we created. */
            XMLReader xr = sp.getXMLReader();
            /* Create a new ContentHandler and apply it to the XML-Reader */
            WeatherHandler myWeatherHandler = new WeatherHandler();
            xr.setContentHandler(myWeatherHandler);
 
            /* Parse the xml-data from our URL. */
            xr.parse(new InputSource(url.openStream())); 
            
            /* Parsing has finished. */
            String myText = myWeatherHandler.getInfo();
            tv.setText(myText);
            
        } catch (Exception e)
        {
            tv.setText("Error: " + e.getMessage()); 
            Log.e(MY_DEBUG_TAG, "WeatherQueryError", e); 
        }        
        /* Display the TextView. */
        setContentView(tv);
    }
}
Parsed in 0.038 seconds,  using GeSHi 1.0.8.4

Dumps out this:

Code: Select all: 10-07 22:55:45.664: ERROR/AUWeather(163): WeatherQueryError 10-07 22:55:45.664: ERROR/AUWeather(163): java.net.UnknownHostException: Host is unresolved: weather.yahooapis.com:80 10-07 22:55:45.664: ERROR/AUWeather(163): at java.net.Socket.connect(Socket.java:928) 10-07 22:55:45.664: ERROR/AUWeather(163): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:61) 10-07 22:55:45.664: ERROR/AUWeather(163): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionManager$ConnectionPool.getHttpConnection(HttpConnectionManager.java:145) 10-07 22:55:45.664: ERROR/AUWeather(163): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionManager.getConnection(HttpConnectionManager.java:67) 10-07 22:55:45.664: ERROR/AUWeather(163): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection.getHTTPConnection(HttpURLConnection.java:800) 10-07 22:55:45.664: ERROR/AUWeather(163): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:786) 10-07 22:55:45.664: ERROR/AUWeather(163): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1030) 10-07 22:55:45.664: ERROR/AUWeather(163): at java.net.URL.openStream(URL.java:664) 10-07 22:55:45.664: ERROR/AUWeather(163): at com.android.weatherapp.weatherapp.onCreate(weatherapp.java:45) 10-07 22:55:45.664: ERROR/AUWeather(163): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1122) 10-07 22:55:45.664: ERROR/AUWeather(163): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2103) 10-07 22:55:45.664: ERROR/AUWeather(163): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2156) 10-07 22:55:45.664: ERROR/AUWeather(163): at android.app.ActivityThread.access$1800(ActivityThread.java:112) 10-07 22:55:45.664: ERROR/AUWeather(163): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1580) 10-07 22:55:45.664: ERROR/AUWeather(163): at android.os.Handler.dispatchMessage(Handler.java:88) 10-07 22:55:45.664: ERROR/AUWeather(163): at android.os.Looper.loop(Looper.java:123) 10-07 22:55:45.664: ERROR/AUWeather(163): at android.app.ActivityThread.main(ActivityThread.java:3742) 10-07 22:55:45.664: ERROR/AUWeather(163): at java.lang.reflect.Method.invokeNative(Native Method) 10-07 22:55:45.664: ERROR/AUWeather(163): at java.lang.reflect.Method.invoke(Method.java:515) 10-07 22:55:45.664: ERROR/AUWeather(163): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) 10-07 22:55:45.664: ERROR/AUWeather(163): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:497) 10-07 22:55:45.664: ERROR/AUWeather(163): at dalvik.system.NativeStart.main(Native Method)

And I have no idea why. Its almost straight from examples and the URL checks out. I have no proxy either. Any ideas? The internet permission is set as well.

Rahul · by **Rahul** » Tue Oct 14, 2008 1:34 pm

did you see this example?

android_weather_forecast_-_google_weather_api_-_full_source-t361.html

Host Is Unresolved - Basic Application (No Proxy)

Host Is Unresolved - Basic Application (No Proxy)

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