First knowledge of Spinner

Spinner is a drop-down list box, like a ListView, is also an indirect subclass of adapterview, a window that displays data.

< Spinner             Android:id = "@+id/spinner1"             android:layout_width= "Match_parent"            android:layout_height= "Wrap_ Content "            android:entries=" @array/spinner_name "            android:prompt = "@string/hello_world" />

Set the data source for spinner

<?XML version= "1.0" encoding= "Utf-8"?><Resources>    <String-arrayname= "Spinner_name">        <Item>Mercury</Item>        <Item>Venus</Item>        <Item>Earth</Item>        <Item>Mars</Item>        <Item>Jupiter</Item>        <Item>Saturn</Item>        <Item>Uranus</Item>        <Item>Neptune</Item>    </String-array></Resources>

Set adapter for spinner and add event responses

1      Public void Showspinner () {  2         Spinner Spinner = (Spinner) Findviewbyid (r.id.spinner2); 3         The Simple_spinner_item layout is provided by the platform and are the default layout you should use unless yo U ' d like-to-Define your own layout for the spinner ' s appearance.         Spinneradapter Spinneradapter = Arrayadapter. Createfromresource (Formactivity.this, R.array.spinner_name,Android.) R.layout.simple_spinner_item); 8         

Specify the layout to use when the list of choices appears | sets the layout resource to create the drop of views.
Spinneradapter. Setdropdownviewresource (Android. R.layout.simple_spinner_dropdown_item);

 9 spinner. Setadapter (spinneradapter);TenSpinner.Setonitemselectedlistener(NewOnitemselectedlistener () { +  - @Override +              Public voidOnitemselected (adapterview<?>Parent, view view, A                     intPositionLongID) { at                 //TODO auto-generated Method Stub -  - log.i (TAG, -"Showspinner:onitemselected" -+ ((TextView) view). GetText () + ":p osition" -+ID); in             } -  to @Override +              Public voidOnnothingselected (adapterview<?>parent) { -                 //TODO auto-generated Method Stub theLOG.I (TAG, "showspinner:onnothingselected"); *             } $         });Panax Notoginseng  -}

First knowledge of Spinner