get HTML code of website from android app -

i developing first android application.

i try html source website, use code:

    httpclient client = new defaulthttpclient();     httpget request = new httpget(urlweb);     httpresponse response = client.execute(request);      string html = "";     inputstream in = response.getentity().getcontent();     bufferedreader reader = new bufferedreader(new inputstreamreader(in));     stringbuilder str = new stringbuilder();     string line = null;     while((line = reader.readline()) != null)     {         str.append(line);     }     in.close();     html = str.tostring(); 

also add permissions internet in manifest.

but obtain error:

05-02 18:56:56.967: e/androidruntime(17659): fatal exception: main 05-02 18:56:56.967: e/androidruntime(17659): java.lang.illegalstateexception: not execute method of activity 05-02 18:56:56.967: e/androidruntime(17659):    @ android.view.view$1.onclick(view.java:3597) 05-02 18:56:56.967: e/androidruntime(17659):    @ android.view.view.performclick(view.java:4202) 05-02 18:56:56.967: e/androidruntime(17659):    @ android.view.view$performclick.run(view.java:17340) 05-02 18:56:56.967: e/androidruntime(17659):    @ android.os.handler.handlecallback(handler.java:725) 05-02 18:56:56.967: e/androidruntime(17659):    @ android.os.handler.dispatchmessage(handler.java:92) 05-02 18:56:56.967: e/androidruntime(17659):    @ android.os.looper.loop(looper.java:137) 05-02 18:56:56.967: e/androidruntime(17659):    @ android.app.activitythread.main(activitythread.java:5191) 05-02 18:56:56.967: e/androidruntime(17659):    @ java.lang.reflect.method.invokenative(native method) 05-02 18:56:56.967: e/androidruntime(17659):    @ java.lang.reflect.method.invoke(method.java:511) 05-02 18:56:56.967: e/androidruntime(17659):    @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:795) 05-02 18:56:56.967: e/androidruntime(17659):    @ com.android.internal.os.zygoteinit.main(zygoteinit.java:562) 05-02 18:56:56.967: e/androidruntime(17659):    @ dalvik.system.nativestart.main(native method) 05-02 18:56:56.967: e/androidruntime(17659): caused by: java.lang.reflect.invocationtargetexception 05-02 18:56:56.967: e/androidruntime(17659):    @ java.lang.reflect.method.invokenative(native method) 05-02 18:56:56.967: e/androidruntime(17659):    @ java.lang.reflect.method.invoke(method.java:511) 05-02 18:56:56.967: e/androidruntime(17659):    @ android.view.view$1.onclick(view.java:3592) 05-02 18:56:56.967: e/androidruntime(17659):    ... 11 more 05-02 18:56:56.967: e/androidruntime(17659): caused by: android.os.networkonmainthreadexception 05-02 18:56:56.967: e/androidruntime(17659):    @ android.os.strictmode$androidblockguardpolicy.onnetwork(strictmode.java:1117) 05-02 18:56:56.967: e/androidruntime(17659):    @ java.net.inetaddress.lookuphostbyname(inetaddress.java:385) 05-02 18:56:56.967: e/androidruntime(17659):    @ java.net.inetaddress.getallbynameimpl(inetaddress.java:236) 05-02 18:56:56.967: e/androidruntime(17659):    @ java.net.inetaddress.getallbyname(inetaddress.java:214) 05-02 18:56:56.967: e/androidruntime(17659):    @ org.apache.http.impl.conn.defaultclientconnectionoperator.openconnection(defaultclientconnectionoperator.java:137) 05-02 18:56:56.967: e/androidruntime(17659):    @ org.apache.http.impl.conn.abstractpoolentry.open(abstractpoolentry.java:164) 05-02 18:56:56.967: e/androidruntime(17659):    @ org.apache.http.impl.conn.abstractpooledconnadapter.open(abstractpooledconnadapter.java:119) 05-02 18:56:56.967: e/androidruntime(17659):    @ org.apache.http.impl.client.defaultrequestdirector.execute(defaultrequestdirector.java:360) 05-02 18:56:56.967: e/androidruntime(17659):    @ org.apache.http.impl.client.abstracthttpclient.execute(abstracthttpclient.java:555) 05-02 18:56:56.967: e/androidruntime(17659):    @ org.apache.http.impl.client.abstracthttpclient.execute(abstracthttpclient.java:487) 05-02 18:56:56.967: e/androidruntime(17659):    @ org.apache.http.impl.client.abstracthttpclient.execute(abstracthttpclient.java:465) 05-02 18:56:56.967: e/androidruntime(17659):    @ com.example.icpcgb.mainactivity.btn_show(mainactivity.java:72) 

wich problem?

thank much

caused by: android.os.networkonmainthreadexception

you trying perform network operation on ui thread, android 3+ devices don't allow network operation on ui thread. throw networkonmainthreadexception , use asynctask or separate thread perform network operations