Spinner of Android controls

Spinner is used to display list items, similar to a set of single-box radiobutton. Here's a glimpse of its effect.

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I. Overview

Spinner is a control that selects only one item of all items at a time. Its entry comes from the adapter associated with it.

Second, important attributes

Android:prompt: Displays this prompt when the Spinner dialog box is closed

Iii. Important methods

　　　　Setprompt (Charsequence Prompt): Sets the prompt to display when the spinner dialog box is closed

　　　　PerformClick (): Call this view if it is defined Onclicklistener

　　　　Setonitemclicklistener (Adapterview.onitemclicklistener L): Called when the item is clicked

　　　　Ondetachedfromwindow (): Called when spinner is detached from the window.

Iv. Complete code

 Public classSpinnerdemoextendsActivity {@Override Public voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);         Setcontentview (R.layout.spinnerpage); Spinner S1=(Spinner) Findviewbyid (R.id.spinnercolor); Arrayadapter<CharSequence> adapter =Arrayadapter.createfromresource ( This, R.array.colors, Android.         R.layout.simple_spinner_item); Adapter.setdropdownviewresource (Android.         R.layout.simple_spinner_dropdown_item);         S1.setadapter (adapter); S1.setonitemselectedlistener (NewOnitemselectedlistener () { Public voidonitemselected (Adapterview<?> Parent, view view,intPositionLongID) {Showtoast ("spinner1:position=" + position + "id=" +ID); }                      Public voidOnnothingselected (adapterview<?>parent) {Showtoast ("Spinner1:unselected");         }                 }); Spinner S2=(Spinner) Findviewbyid (r.id.spinnerplanet); Adapter= Arrayadapter.createfromresource ( This, R.array.planets, Android.         R.layout.simple_spinner_item); Adapter.setdropdownviewresource (Android.         R.layout.simple_spinner_dropdown_item);         S2.setadapter (adapter); S2.setonitemselectedlistener (NewOnitemselectedlistener () { Public voidonitemselected (Adapterview<?> Parent, view view,intPositionLongID) {Showtoast ("spinner2:position=" + position+1 + "id=" + id+1); }                      Public voidOnnothingselected (adapterview<?>parent) {Showtoast ("Spinner2:unselected");     }                 }); }    Private voidshowtoast (charsequence msg) {Toast.maketext ( This, MSG, Toast.length_short). Show (); }}

Transferred from: http://www.cnblogs.com/salam/archive/2010/10/07/1844980.html

Spinner of Android controls