Android Custom dialog box -

i have button, when click button open dialog box. in dialog box 1 edittext , ok button, enter text, when click ok button in text displaying.
don't know how that, me

use below

 import android.app.activity;  import android.app.alertdialog;   import android.content.context;       import android.content.dialoginterface;    import android.os.bundle;     import android.view.layoutinflater;  import android.view.view;     import android.view.view.onclicklistener;    import android.widget.button;     import android.widget.edittext;   public class mainactivity extends activity {  final context context = this; private button button; private edittext result;  public void oncreate(bundle savedinstancestate) {      super.oncreate(savedinstancestate);     setcontentview(r.layout.main);      // components main.xml     button = (button) findviewbyid(r.id.buttonprompt);     result = (edittext) findviewbyid(r.id.edittextresult);      // add button listener     button.setonclicklistener(new onclicklistener() {          @override         public void onclick(view arg0) {              // prompts.xml view             layoutinflater li = layoutinflater.from(context);             view view= li.inflate(r.layout.prompts, null);              alertdialog.builder alertdialogbuilder = new alertdialog.builder(                     context);              // set prompts.xml alertdialog builder             alertdialogbuilder.setview(view);              final edittext userinput = (edittext) view                     .findviewbyid(r.id.edittextdialoguserinput);              // set dialog message             alertdialogbuilder                 .setcancelable(false)                 .setpositivebutton("ok",                   new dialoginterface.onclicklistener() {                     public void onclick(dialoginterface dialog,int id) {                     // user input , set result                     // edit text                     result.settext(userinput.gettext());                     }                   })                 .setnegativebutton("cancel",                   new dialoginterface.onclicklistener() {                     public void onclick(dialoginterface dialog,int id) {                     dialog.cancel();                     }                   });              // create alert dialog             alertdialog alertdialog = alertdialogbuilder.create();              // show             alertdialog.show();          }     }); } 

}