android - Posted tweet doesn't show on Twitter timeline -

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i using edit text box , post button post tweets on twitter's timeline using app.

but after processing "status updated successfully" toast appears, tweet not showing on timeline... gives error 400 in logcat , shows message bad authentication data!! new oauth. how can fix problem?

here code:

    public class postcommentactivity extends activity {          private static final string consumer_key = "*****";         private static final string consumer_secret = "*******";         static string preference_name = "twitter_oauth";         static final string pref_key_oauth_token = "oauth_token";         static final string pref_key_oauth_secret = "oauth_token_secret";         static final string pref_key_twitter_login = "istwitterlogedin";          sharedpreferences msharedpreferences;         progressdialog pdialog;         edittext et;         button postbtn;         twitter twitter;          @override         protected void oncreate(bundle savedinstancestate) {             // todo auto-generated method stub             setcontentview(r.layout.post_comment);             super.oncreate(savedinstancestate);             et = (edittext) findviewbyid(r.id.edittext);              msharedpreferences = getapplicationcontext().getsharedpreferences("mypref",                                  0);             postbtn = (button) findviewbyid(r.id.post_btn);             postbtn.setonclicklistener(new onclicklistener() {@override              public void onclick(view v) {                 // status edittext                 twitter twitter = twitterfactory.getsingleton();                 string status = et.gettext().tostring();                  // check blank text                 if (status.trim().length() > 0) {                     // update status                     new updatetwitterstatus().execute(status);                 }                 else {                     // edittext empty                     toast.maketext(getapplicationcontext(),                                 "please enter status message", toast.length_short).show();                 }             }         });     }      class updatetwitterstatus extends asynctask<string, string, string> {          @override         protected void onpreexecute() {             super.onpreexecute();             pdialog = new progressdialog(postcommentactivity.this);             pdialog.setmessage("updating twitter...");             pdialog.setindeterminate(false);             pdialog.setcancelable(false);             pdialog.show();         }          /**          * getting places json          *          **/         protected string doinbackground(string... args) {             log.d("tweet text", "> " + args[0]);             string status = args[0];             try {                 configurationbuilder builder = new configurationbuilder();                 builder.setoauthconsumerkey(consumer_key);                 builder.setoauthconsumersecret(consumer_secret);                  ;    // access token                 string access_token = msharedpreferences.getstring(                         pref_key_oauth_token, "");                  // access token secret                 string access_token_secret = msharedpreferences.getstring(                                                pref_key_oauth_secret, "");                 accesstoken accesstoken = new accesstoken(access_token,                 access_token_secret);                 twitter twitter = new twitterfactory(builder.build())                                         .getinstance(accesstoken);                 twitter.setoauthaccesstoken(accesstoken);                  // update status                 twitter4j.status response = twitter.updatestatus(status);                 log.d("status", "> " + response.gettext());             }             catch (twitterexception e) {                 // error in updating status                 log.d("twitter update error", e.getmessage());             }             return null;         }         protected void onpostexecute(string file_url) {              // dismiss dialog after getting products             pdialog.dismiss();              // updating ui background thread             runonuithread(new runnable() {                 @override                 public void run() {                     toast.maketext(getapplicationcontext(),                             "status tweeted successfully", toast.length_short).show();                      // clearing edittext field                     et.settext("");                 }              });         }}     }

i got solution... try code:

public class postcommentactivity extends activity {      private static final string consumer_key = "***";     private static final string consumer_secret = "******";      sharedpreferences msharedpreferences;      edittext et;     button postbtn;     requesttoken requesttoken;     twitter twitter;      @override     protected void oncreate(bundle savedinstancestate) {          // todo auto-generated method stub         setcontentview(r.layout.post_comment);         super.oncreate(savedinstancestate);         if (android.os.build.version.sdk_int > 9) {             strictmode.threadpolicy policy = new strictmode.threadpolicy.builder()                     .permitall().build();             strictmode.setthreadpolicy(policy);         }          et = (edittext) findviewbyid(r.id.edittext);         msharedpreferences = getapplicationcontext().getsharedpreferences("mypref",                              0);          postbtn = (button) findviewbyid(r.id.post_btn);         postbtn.setonclicklistener(new onclicklistener() {    @override             public void onclick(view v) {                  string token = "*****";                 string secret = "*****";                 accesstoken = new accesstoken(token, secret);                 twitter twitter = new twitterfactory().getinstance();                 twitter.setoauthconsumer(consumer_key, consumer_secret);                 twitter.setoauthaccesstoken(a);                 string status = et.gettext().tostring();                 if ((status.trim().length() > 0)) {                     try {                         twitter.updatestatus(status);                          toast.maketext(getapplicationcontext(),                                 "status tweeted successfully", toast.length_short).show();                         // clearing edittext field                         et.settext("");                     }                     catch (twitterexception e) {                          e.printstacktrace();                     }                 }                 else {                     // edittext empty                     toast.maketext(getapplicationcontext(),                             "please enter status message", toast.length_short).show();                 }             }         });     } }

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