downloading and parsing a csv file from yahoo finance doesn't work on my android app -

i'm trying make app, shows latest stock quotes, downloading , parsing specific .csv file. doesn't run.. here mainactivity.java:

package com.jdesign.finanzberater;  import java.io.bufferedinputstream; import java.io.ioexception; import java.io.inputstream; import java.net.malformedurlexception; import java.net.url;  import org.apache.http.util.bytearraybuffer;  import android.app.activity; import android.os.bundle; import android.view.view; import android.widget.button; import android.widget.edittext; import android.widget.textview;   public class mainactivity extends activity {  edittext setsymbol; textview symbolout; textview priceout; textview changepercentageout; button getquote;  @override protected void oncreate(bundle savedinstancestate) {      super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);     setsymbol = (edittext) findviewbyid(r.id.setsymbol);     symbolout = (textview) findviewbyid(r.id.stocksymboloutput);     priceout = (textview) findviewbyid(r.id.stockpriceoutput);     changepercentageout = (textview) findviewbyid(r.id.stockchangepercentageoutput);     getquote = (button) findviewbyid(r.id.get_quote_button);      getquote.setonclicklistener(new view.onclicklistener() {          @override         public void onclick(view arg0) {                url url;                try {                 url = new url("http://download.finance.yahoo.com/d/quotes.csv?s=" + setsymbol.gettext() + "&f=sl1p2");                inputstream stream = url.openstream();                bufferedinputstream bis = new bufferedinputstream(stream);               bytearraybuffer baf = new bytearraybuffer(50);                int current = 0;               while ((current = bis.read()) != -1) {                   baf.append((byte) current);               }                 string stocktxt = new string(baf.tobytearray());                string[] tokens = stocktxt.split(",");                string stocksymbol = tokens[0];               string stockprice = tokens[1];               string stockchangepercentage = tokens[2];                 string fstocksymbol = stocksymbol.substring(1, stocksymbol.length() -1);               string fstockchangepercentage = stockchangepercentage.substring(1, stockchangepercentage.length() -3);                symbolout.settext(fstocksymbol);               priceout.settext(stockprice);               changepercentageout.settext(fstockchangepercentage);                 } catch (malformedurlexception e) {                   e.printstacktrace();             } catch (ioexception e) {                  e.printstacktrace();             }           }     });    }    } 

..my activity_main.xml:

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" tools:context=".mainactivity" >  <edittext     android:id="@+id/setsymbol"     android:layout_width="0dip"     android:layout_height="wrap_content"     android:layout_weight="1"     android:ems="10"     android:hint="@string/setsymbol" >      <requestfocus /> </edittext>  <button     android:id="@+id/get_quote_button"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="@string/get_quote" />  <textview     android:id="@+id/stocksymboloutput"     android:layout_width="wrap_content"     android:layout_height="wrap_content" />  <textview     android:id="@+id/stockpriceoutput"     android:layout_width="wrap_content"     android:layout_height="wrap_content" />  <textview     android:id="@+id/stockchangepercentageoutput"     android:layout_width="wrap_content"     android:layout_height="wrap_content" />    </linearlayout> 

and manifest:

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"     package="com.jdesign.finanzberater"     android:versioncode="1"     android:versionname="1.0" >  <uses-sdk     android:minsdkversion="8"     android:targetsdkversion="17" /> <uses-permission android:name="android.permission.internet"/>  <application     android:allowbackup="true"     android:icon="@drawable/ic_launcher"     android:label="@string/app_name"     android:theme="@style/apptheme" >     <activity         android:name="com.jdesign.finanzberater.mainactivity"         android:label="@string/app_name" >         <intent-filter>             <action android:name="android.intent.action.main" />              <category android:name="android.intent.category.launcher" />         </intent-filter>     </activity> </application>  </manifest> 

and logcat of course:

08-08 12:26:15.745: d/libegl(24748): loaded /system/lib/egl/libgles_android.so 08-08 12:26:15.755: d/libegl(24748): loaded /system/lib/egl/libegl_adreno200.so 08-08 12:26:15.755: d/libegl(24748): loaded /system/lib/egl/libglesv1_cm_adreno200.so 08-08 12:26:15.755: d/libegl(24748): loaded /system/lib/egl/libglesv2_adreno200.so 08-08 12:26:15.775: d/memalloc(24748): /dev/pmem: mapped buffer base:0x52015000   size:26386432 offset:24297472 fd:62 08-08 12:26:15.785: d/openglrenderer(24748): enabling debug mode 0 08-08 12:26:15.855: d/memalloc(24748): /dev/pmem: mapped buffer base:0x53d20000 size:13746176 offset:11657216 fd:65  08-08 12:26:16.816: d/memalloc(24748): /dev/pmem: mapped buffer base:0x54bc3000 size:4177920 offset:2088960 fd:68 08-08 12:26:17.116: w/textview(24748): getlabel fail! framework orig behavior 08-08 12:26:31.100: d/androidruntime(24748): shutting down vm 08-08 12:26:31.100: w/dalvikvm(24748): threadid=1: thread exiting uncaught exception (group=0x40aac228) 08-08 12:26:31.120: e/androidruntime(24748): fatal exception: main 08-08 12:26:31.120: e/androidruntime(24748): android.os.networkonmainthreadexception 08-08 12:26:31.120: e/androidruntime(24748):    @ android.os.strictmode$androidblockguardpolicy.onnetwork(strictmode.java:1178) 08-08 12:26:31.120: e/androidruntime(24748):at java.net.inetaddress.lookuphostbyname(inetaddress.java:394) 08-08 12:26:31.120: e/androidruntime(24748):    @ java.net.inetaddress.getallbynameimpl(inetaddress.java:245) 08-08 12:26:31.120: e/androidruntime(24748):    @ java.net.inetaddress.getallbyname(inetaddress.java:220) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpconnection.<init>(httpconnection.java:71) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpconnection.<init>(httpconnection.java:50) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpconnection$address.connect(httpconnection.java:351) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpconnectionpool.get(httpconnectionpool.java:86) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpconnection.connect(httpconnection.java:128) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpengine.opensocketconnection(httpengine.java:308) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpengine.connect(httpengine.java:303) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpengine.sendsocketrequest(httpengine.java:282) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpengine.sendrequest(httpengine.java:232) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpurlconnectionimpl.getresponse(httpurlconnectionimpl.java:273) 08-08 12:26:31.120: e/androidruntime(24748):    @ libcore.net.http.httpurlconnectionimpl.getinputstream(httpurlconnectionimpl.java:168) 08-08 12:26:31.120: e/androidruntime(24748):    @ java.net.url.openstream(url.java:462) 08-08 12:26:31.120: e/androidruntime(24748):    @ com.jdesign.finanzberater.mainactivity$1.onclick(mainactivity.java:48) 08-08 12:26:31.120: e/androidruntime(24748):    @ android.view.view.performclick(view.java:3549) 08-08 12:26:31.120: e/androidruntime(24748):    @ android.view.view$performclick.run(view.java:14393) 08-08 12:26:31.120: e/androidruntime(24748):    @ android.os.handler.handlecallback(handler.java:605) 08-08 12:26:31.120: e/androidruntime(24748):    @ android.os.handler.dispatchmessage(handler.java:92) 08-08 12:26:31.120: e/androidruntime(24748):    @ android.os.looper.loop(looper.java:154) 08-08 12:26:31.120: e/androidruntime(24748):    @ android.app.activitythread.main(activitythread.java:4945) 08-08 12:26:31.120: e/androidruntime(24748):    @ java.lang.reflect.method.invokenative(native method) 08-08 12:26:31.120: e/androidruntime(24748):    @ java.lang.reflect.method.invoke(method.java:511) 08-08 12:26:31.120: e/androidruntime(24748):    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:784) 08-08 12:26:31.120: e/androidruntime(24748):    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:551) 08-08 12:26:31.120: e/androidruntime(24748):    @ dalvik.system.nativestart.main(native method) 08-08 12:26:33.442: d/process(24748): killprocess, pid=24748 08-08 12:26:33.532: d/process(24748): dalvik.system.vmstack.getthreadstacktrace(native method) 08-08 12:26:33.552: d/process(24748): java.lang.thread.getstacktrace(thread.java:599) 08-08 12:26:33.562: d/process(24748): android.os.process.killprocess(process.java:790) 08-08 12:26:33.562: d/process(24748): com.android.internal.os.runtimeinit$uncaughthandler.uncaughtexception(runtimeinit.java:104) 08-08 12:26:33.572: d/process(24748): java.lang.threadgroup.uncaughtexception(threadgroup.java:693) 08-08 12:26:33.602: d/process(24748): java.lang.threadgroup.uncaughtexception(threadgroup.java:690) 08-08 12:26:33.642: d/process(24748): dalvik.system.nativestart.main(native method) 08-08 12:26:33.653: i/process(24748): sending signal. pid: 24748 sig: 9 

it nice if correct code.
kind regards,
julien

the following code should work:

inside mainactivity, change listener , add method setresult:

getquote.setonclicklistener(new view.onclicklistener() {     @override     public void onclick(view arg0) {         try {             list<string> results = new task().execute(                     setsymbol.gettext().tostring()).get();             setresult(results.get(0), results.get(1), results.get(2));         } catch (interruptedexception e) {             // todo auto-generated catch block             e.printstacktrace();         } catch (executionexception e) {             // todo auto-generated catch block             e.printstacktrace();         }     } });  private void setresult(string fstocksymbol, string stockprice, string fstockchangepercentage) {     symbolout.settext(fstocksymbol);     priceout.settext(stockprice);     changepercentageout.settext(fstockchangepercentage); } 

in addition have create asynctask:

class task extends asynctask<string, void, list<string>> {      protected list<string> doinbackground(string... symbols) {         try {             url url;              try {                 url = new url(                         "http://download.finance.yahoo.com/d/quotes.csv?s="                                 + symbols[0] + "&f=sl1p2");                  inputstream stream = url.openstream();                  bufferedinputstream bis = new bufferedinputstream(stream);                 bytearraybuffer baf = new bytearraybuffer(50);                  int current = 0;                 while ((current = bis.read()) != -1) {                     baf.append((byte) current);                 }                  string stocktxt = new string(baf.tobytearray());                  string[] tokens = stocktxt.split(",");                  string stocksymbol = tokens[0];                 string stockprice = tokens[1];                 string stockchangepercentage = tokens[2];                  string fstocksymbol = stocksymbol.substring(1,                         stocksymbol.length() - 1);                 string fstockchangepercentage = stockchangepercentage                         .substring(1, stockchangepercentage.length() - 3);                  list<string> results = new arraylist<string>();                 results.add(fstocksymbol);                 results.add(stockprice);                 results.add(fstockchangepercentage);                  return results;              } catch (malformedurlexception e) {                  e.printstacktrace();             } catch (ioexception e) {                  e.printstacktrace();             }             return null;         } catch (exception e) {             e.printstacktrace();             return null;         }     } } 

you have add error handling.