android - Why does my score counter always reset? -

i'm trying make game , can't seem score counter work. problem every time button clicked value of integer goes 0.

public void button(view view){     integer counter = integer.valueof(0);     counter = counter++;     final textview score = (textview) findviewbyid(r.id.score);     score.settext("score: " + counter); } 

i see why score goes 0 every time don't know how fix it. i'm new development sample code appreciated. thanks.

because resetting it.

integer counter = integer.valueof(0); // here counter = counter++; 

use global variable instead.

public class myactivity extends activity{     int counter;      protected void oncreate(bundle savedinstancestate){         super.oncreate(savedinstancestate);         setcontentview(...);         counter = 0;      }  public void button(view view){     counter = counter++;     final textview score = (textview) findviewbyid(r.id.score);     score.settext("score: " + counter); }  }