android - Unable to set text in a Text View -


i have strange problem using android studio. can't set text of textview (tax), reference isn't 'null pointer', , haven't error or exception, don't see text.

my main class:

 @override public void oncreate(bundle savedinstancestate) {     setcontentview(r.layout.main);     super.oncreate(savedinstancestate);      getwindow().setfeatureint(window.feature_custom_title,   r.layout.custom_title);       tax = (textview) findviewbyid(r.id.ax);     tax.settext("prova");     // set custom title     mtitle = (textview) findviewbyid(r.id.title_left_text);   //  mtitle.settext(r.string.app_name);     mtitle = (textview) findviewbyid(r.id.title_right_text);      // local bluetooth adapter     mbluetoothadapter = bluetoothadapter.getdefaultadapter();      // if adapter null, bluetooth not supported     if (mbluetoothadapter == null) {         toast.maketext(this, "bluetooth not available",         toast.length_long).show();         finish();         return;     } }

xml main :

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:weightsum="1">  <textview android:id="@+id/ax"     android:layout_width="198dp"     android:layout_height="38dp"     android:textsize="20dp"     android:visibility="visible"     android:background="#ffffffff"     android:textcolor="#fff"  />   </linearlayout>

thank's you!

update:

thank's you! can set text 1 time(the first time)! in class, try set text reference (using tax reference static , public), them doesn't change, remains first, , android studio print on console error:

only original thread created view hierarchy can touch views

remotebluetooth.tax.settext(string.valueof(ax));

you can fix error using id starting lowercase letter. android seems have problem id's starting uppercase letter.


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