Android Help Button setOnclickListener -

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my app works after assigning button bbtn setonclicklistener app doesn't load on emulator , gives me following errors :

activitymanager: starting: intent { act=android.intent.action.main cat=[android.intent.category.launcher] cmp=com.hawa.hawa_pro/.mainactivity } activitymanager: warning: activity not started, current task has been brought front

code:

package com.hawa.hawa_pro;  import android.os.bundle; import android.app.actionbar.tab; import android.app.activity; import android.app.tabactivity; import android.content.intent; import android.util.log; import android.view.menu; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.widget.tabhost; import android.content.res.resources;   public class mainactivity extends tabactivity {  private tabhost mtabhost; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      button bbtn= (button) findviewbyid(r.id.button4);     bbtn.setonclicklistener(new onclicklistener() {          @override         public void onclick(view v) {             // todo auto-generated method stub             intent i= new intent(mainactivity.this,beauty.class);             startactivity(i);         }     });      resources res= getresources();     mtabhost =gettabhost();     tabhost.tabspec spec;     intent intent;      //home tab     intent= new intent(this, home.class);      spec = mtabhost.newtabspec("home")             .setindicator("home",res.getdrawable(r.drawable.homebtn))             .setcontent(intent);     mtabhost.addtab(spec);      //won tab   intent= new intent(this, about_wom.class);      spec = mtabhost.newtabspec("about_wom")             .setindicator("about wom",res.getdrawable(r.drawable.aboutwombtn))             .setcontent(intent);     mtabhost.addtab(spec);   intent= new intent(this, contact.class);      spec = mtabhost.newtabspec("contact")             .setindicator("contact",res.getdrawable(r.drawable.contactbtn))             .setcontent(intent);     mtabhost.addtab(spec);     mtabhost.setcurrenttab(0); }   }

exit current app on emulator first, run app again :)


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