java - Why do I get an "Your TabHost must have a TabWidget whose id attribute is 'android.R.id.tabs'" error? -

i new in android studio development , errors have messed day. looking solution 2 days many people had same problem me each 1 of them had different solution. in stackoverflow solutions varied, appreciate if me overpass error can go on.

the error getting this:

java.lang.runtimeexception: tabhost must have tabwidget id attribute 'android.r.id.tabs'

i have modified .xml file , .java file lot no chance.

here .xml:

<relativelayout 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:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" android:paddingbottom="@dimen/activity_vertical_margin" tools:context=".mainactivity" android:clickable="true">   <tabhost     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:id="@id/tabhost"     android:layout_alignparentbottom="true"     android:layout_alignparentstart="true">      <linearlayout         android:layout_width="match_parent"         android:layout_height="match_parent"         android:orientation="vertical">          <tabwidget             android:id="@+id/tabshost"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:orientation="vertical"></tabwidget>          <framelayout             android:id="@android:id/tabcontent"             android:layout_width="match_parent"             android:layout_height="match_parent">              <linearlayout                 android:id="@+id/creatortab"                 android:layout_width="match_parent"                 android:layout_height="match_parent"                 android:orientation="vertical">                  <textview                     android:layout_width="wrap_content"                     android:layout_height="wrap_content"                     android:textappearance="?android:attr/textappearancelarge"                     android:text="contact creator"                     android:id="@+id/contactcreator"                     android:layout_alignparenttop="true"                     android:layout_centerhorizontal="true" />                  <edittext                     android:layout_width="wrap_content"                     android:layout_height="wrap_content"                     android:inputtype="textpersonname"                     android:text="name"                     android:ems="10"                     android:id="@+id/name"                     android:layout_below="@+id/contactcreator"                     android:layout_alignparentstart="true"                     android:layout_margintop="34dp"                     android:layout_alignparentend="true"                     android:hint="name" />                  <edittext                     android:layout_width="wrap_content"                     android:layout_height="wrap_content"                     android:inputtype="phone"                     android:ems="10"                     android:id="@+id/phone"                     android:layout_below="@+id/name"                     android:layout_alignparentstart="true"                     android:layout_alignend="@+id/name"                     android:hint="phone"                     android:text="phone"                     android:layout_margintop="44dp" />                  <edittext                     android:layout_width="wrap_content"                     android:layout_height="wrap_content"                     android:inputtype="textemailaddress"                     android:ems="10"                     android:id="@+id/email"                     android:layout_below="@+id/phone"                     android:layout_alignparentstart="true"                     android:layout_alignend="@+id/phone"                     android:text="e-mail"                     android:layout_margintop="54dp"                     android:hint="email" />                  <button                     android:layout_width="match_parent"                     android:layout_height="wrap_content"                     android:text="add contact"                     android:id="@+id/addcontact"                     android:enabled="false"                     android:allowundo="false"                     android:clickable="false"                     android:hint="add contact"                     android:nestedscrollingenabled="false"                     android:layout_alignparentbottom="true"                     android:layout_alignparentstart="true"                     android:layout_margintop="74dp" />                  <edittext                     android:layout_width="wrap_content"                     android:layout_height="wrap_content"                     android:inputtype="textpostaladdress"                     android:ems="10"                     android:id="@+id/address"                     android:text="address"                     android:layout_above="@+id/addcontact"                     android:layout_alignparentstart="true"                     android:layout_margintop="64dp"                     android:layout_alignend="@+id/email"                     android:hint="address" />             </linearlayout>                 <linearlayout                     android:id="@+id/listtab"                     android:layout_width="match_parent"                     android:layout_height="match_parent"                     android:orientation="vertical"></linearlayout>              </framelayout>         </linearlayout>     </tabhost>  </relativelayout> 

and .java:

edittext nametxt, phonetxt, emailtxt, addresstxt;   @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      nametxt = (edittext)findviewbyid(r.id.name);     phonetxt = (edittext)findviewbyid(r.id.phone);     emailtxt = (edittext)findviewbyid(r.id.email);     addresstxt = (edittext)findviewbyid(r.id.address);      tabhost tabhost = (tabhost) findviewbyid(r.id.tabhost);      tabhost.setup();      tabhost.tabspec tabspec = tabhost.newtabspec("creator");     tabspec.setcontent(r.id.creatortab);     tabspec.setindicator("creator");     tabhost.addtab(tabspec);      tabspec = tabhost.newtabspec("list");     tabspec.setcontent(r.id.listtab);     tabspec.setindicator("list");     tabhost.addtab(tabspec);        final button addbtn = (button)findviewbyid(r.id.addcontact);     addbtn.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {             toast.maketext(getapplicationcontext(), "your contact has been added", toast.length_short).show();         }     });       nametxt.addtextchangedlistener(new textwatcher() {         @override         public void beforetextchanged(charsequence s, int start, int count, int after) {           }          @override         public void ontextchanged(charsequence s, int start, int before, int count) {             addbtn.setenabled(!nametxt.gettext().tostring().trim().isempty());//if nametxt equals nothing,                                                                                 //to trim koitaei gia kena pisw kai mprosta          }          @override         public void aftertextchanged(editable s) {          }     });  }  @override public boolean oncreateoptionsmenu(menu menu) {     // inflate menu; adds items action bar if present.     getmenuinflater().inflate(r.menu.menu_main, menu);     return true; }  @override public boolean onoptionsitemselected(menuitem item) {     // handle action bar item clicks here. action bar     // automatically handle clicks on home/up button, long     // specify parent activity in androidmanifest.xml.     int id = item.getitemid();      //noinspection simplifiableifstatement     if (id == r.id.action_settings) {         return true;     }      return super.onoptionsitemselected(item); } 

}

i appreciate recommendations.

your error (your tabhost must have tabwidget id attribute 'android.r.id.tabs') says all:

change this

<tabwidget         android:id="@+id/tabshost"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:orientation="vertical"></tabwidget> 

to

<tabwidget         android:id="@+id/android.r.id.tabs"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:orientation="vertical"> </tabwidget>