Android Custom Product Purchase quantity add and subtract control _android

In the purchase of goods, you can customize the number control, to determine the actual number of goods purchased, how to implement this control, please refer to the following:

1. Customize the requirements of the number plus and minus controls

Create Module-numberaddsubview

A_ input can only be a number, and can not enter through the keyboard

B_ the number by adding and subtraction buttons

C_ Monitor plus minus button

The D_ array has a minimum and maximum limit

E_ Custom Properties

2. Provide the interface, let the outside monitor the change of the number

1_ Settings interface

 @Override public void OnClick (View v) {if (V.getid () = = R.id.btn_sub) {//toast.maketext (M
  Context, "minus", Toast.length_short). Show ();
  Subnum ();
  if (onbuttonclicklistenter!= null) {Onbuttonclicklistenter.onbuttonsubclick (V, value);
  } else if (v.getid () = = R.id.btn_add) {//toast.maketext (Mcontext, add, Toast.length_short). Show ();
  Addnum ();
  if (onbuttonclicklistenter!= null) {Onbuttonclicklistenter.onbuttonaddclick (V, value); }} public interface Onbuttonclicklistenter {/** * callback This method when the Add button is clicked * * @param view * @param value/PU
 
 Blic void Onbuttonaddclick (view view, int value);
/** * Callback This method when the reduction button is clicked * * @param view * @param value */public void Onbuttonsubclick (view view, int value);
 
Private Onbuttonclicklistenter Onbuttonclicklistenter; public void Setonbuttonclicklistenter (Onbuttonclicklistenter onbuttonclicklistenter) {this.onbuttonclicklistenter =
Onbuttonclicklistenter; }

2_ Monitoring Changes

public class Mainactivity extends Appcompatactivity {
 
 private numberaddsubview nb_addsub_view;
 
 @Override
 protected void onCreate (Bundle savedinstancestate) {
  super.oncreate (savedinstancestate);
  Setcontentview (r.layout.activity_main);
  Nb_addsub_view = (Numberaddsubview) Findviewbyid (R.id.nb_addsub_view);
 
  Nb_addsub_view.setonbuttonclicklistenter (New Numberaddsubview.onbuttonclicklistenter () {
   @Override
   public void Onbuttonaddclick (view view, int value) {
    toast.maketext (mainactivity.this, "AddClick vaule==" +value, Toast.length_short). Show ();
 
   @Override public
   void Onbuttonsubclick (view view, int value) {
    toast.maketext (mainactivity.this, "Subclick vaule== "+value,toast.length_short"). Show ();}}

GitHub Complete code: Https://github.com/ganchuanpu/NumberAddSubView

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