java - Convert Android.Widget.Button to JSON -

i making app have save dynamically created android.widget.button-objects , attributes, id, when app closed , opened again.
these buttons saved in arraylist.

my idea convert button-objects json , save them in sharedpreference.

my problem cant convert buttons json, using following code this, if found on stackoverflow:

(for tryouts using new button-object)

button btn = new button(this);  gson gson = new gson();  string json = gson.tojson(btn); 

its working string-object or integer-object not button-object.

can me?

if create buttons dynamically means set color, text, ... them. when want save them need know how many buttons had , custom attributes you've set each of them.

so can that: manage 2 lists, 1 buttons , 1 custom attributes. make easier can use custom buttonbuilder manage attributes. each time want new button, create new buttonbuilder, set attributes, generate button , store both builder , button in 2 separated lists. can store list of builders in sharedprefs , regenerate buttons list next time open app.

list<buttonbuilder> mbuilders = new arraylist<>(); list<button> mbuttons = new arraylist<>();  /**  * display new button  */ public void addbutton(/* list of parameters*/) {     buttonbuilder builder = new buttonbuilder()             .setbgcolor(mycolor)             .settext(mytext);      button button = builder.build(context);      mbuilders.add(builder);     mbuttons.add(button);      // ... display button }  /**  * call method when need regenerate buttons  */ public void regeneratebuttonsonstart() {     // shared preferences     mbuilders = getbuildersfromsharedprefs();      button btn;     (buttonbuilder builder : mbuilders) {         btn = builder.build(context);         mbuttons.add(btn);          // ... display button     }  }  /**  * custom button builder  */  public class buttonbuilder {     private int mbgcolor;     private string mtext;     // ... whatever want       public buttonbuilder() {     }      public buttonbuilder setbgcolor(int bgcolor) {         this.mbgcolor = bgcolor;         return this;     }      public buttonbuilder settext(string text) {         this.mtext = text;         return this;     }      public button build(context context) {         button btn = new button(context);         btn.settext(mtext);         btn.setbackgroundcolor(mbgcolor);          return btn;     } }