java - Cannot find symbol method findViewByInt -


i have created tabbed activity , wish 1 of tabs display current time , date. have linked fragments having issues displaying time , date.

this error:

error:(34, 61) error: cannot find symbol method findviewbyid(int)

and also:

error:(31, 25) error: cannot find symbol method runonuithread()

this code;

package com.example.user.plannerv2;  import android.icu.text.simpledateformat; import android.os.build; import android.support.annotation.nullable; import android.support.annotation.requiresapi; import android.support.v4.app.fragment; import android.os.bundle; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.button; import android.widget.textview; import android.widget.toast;  public class sub_page01 extends fragment {     private static final string tag = "sub_page01";      // private button btntest;      @nullable     @override     public view oncreateview(layoutinflater inflater, @nullable viewgroup container, @nullable bundle savedinstancestate) {         view view = inflater.inflate(r.layout.fragment_sub_page01,container,false);          thread t = new thread() {             public void run() {                 try {                     while (!isinterrupted()) {                         thread.sleep(1000);                         runonuithread(new runnable() {                             @requiresapi(api = build.version_codes.n)                             public void run() {                                 textview tdate = (textview) findviewbyid(r.id.date);                                 long date = system.currenttimemillis();                                 simpledateformat sdf = new simpledateformat("mmm dd yyyy\nhh-mm-ss a");                                 string datestring = sdf.format(date);                                 tdate.settext(datestring);                             }                         });                     }                 } catch (interruptedexception e) {                 }             }         };         t.start();            return view;     }

any grateful.

you inside fragment, should use view.findviewbyid( ) instead.

replace: textview tdate = (textview) findviewbyid(r.id.date);

to: textview tdate = (textview) view.findviewbyid(r.id.date);


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