android - Time Doesn't update in TextView on every Button click.... What's the issue? -


time update first click... if click next time doesn't work. me... question end.

stack overflow want me type more details. question doesn't need more explanation

i don't know add can't type more long still want me type make code

java code :

package com.test.blog.timepicktest;  import android.support.v7.app.appcompatactivity; import android.os.bundle; import android.view.view; import android.widget.button; import android.widget.textview;  import java.util.calendar;  public class mainactivity extends appcompatactivity {      calendar c = calendar.getinstance();     textview tv;     button btn;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         tv = (textview) findviewbyid(r.id.tv);         btn = (button) findviewbyid(r.id.btn);         btn.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 tv.settext(c.get(calendar.hour) + ":" + c.get(calendar.minute) + ":" + c.get(calendar.second));             }         });       }   }

xml file :

<?xml version="1.0" encoding="utf-8"?> <android.support.constraint.constraintlayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     tools:context="com.adiraimaji.blog.timepicktest.mainactivity">      <textview          android:layout_width="174dp"         android:layout_height="48dp"         android:gravity="center"         app:layout_constraintbottom_tobottomof="parent"         app:layout_constraintleft_toleftof="parent"         app:layout_constraintright_torightof="parent"         app:layout_constrainttop_totopof="parent"         app:layout_constraintvertical_bias="0.268"         tools:layout_editor_absolutex="82dp"         android:id="@+id/tv"         app:layout_constrainthorizontal_bias="0.501" />      <button         android:id="@+id/btn"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="button"         android:layout_margintop="8dp"         android:layout_marginright="8dp"         app:layout_constraintright_torightof="parent"         android:layout_marginleft="8dp"         app:layout_constraintleft_toleftof="parent"         app:layout_constrainttop_tobottomof="@+id/tv"         app:layout_constraintbottom_tobottomof="parent"         android:layout_marginbottom="8dp" />  </android.support.constraint.constraintlayout>

c.get() not update calendar date.

you must use calendar.getinstance().get(...) when handle onclick.


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