Custom Android preference--spinnerpreference for private customization

Because of customer demand spinnerpreference, the online search is not, but can only rewrite components, now the process to share everyone.

CustomSpinnerpreferenceOne: First from the expansionPreferencestart: Class files must inherit fromPreferenceand implement the constructor, as follows

Public Myspinnerpreference (Context context) {        super (context);    }    Public Myspinnerpreference (context context, AttributeSet Attrs) {        Super (context, attrs);    }    Public Myspinnerpreference (context context, AttributeSet attrs, int defstyle) {        Super (context, attrs, Defstyle);    }

Two: Rewriting of custom layout files

<?xml version= "1.0" encoding= "Utf-8"?><!--Layout of a header item in preferenceactivity. --><linearlayout xmlns:android= "http://schemas.android.com/apk/res/android" android:layout_width= "Match_ Parent "android:layout_height=" wrap_content "android:background="? Android:attr/activatedbackgroundindicator "Android Oid:gravity= "center_vertical" android:minheight= "48DP" android:paddingend= "Android:attr/scrollbarsize" android:p addingstart= "@dimen/mypreference_margin_start" > <relativelayout android:layout_width= "0DP" Android : layout_height= "wrap_content" android:layout_marginbottom= "6dip" android:layout_marginend= "6dip" Android Oid:layout_marginstart= "2dip" android:layout_margintop= "6dip" android:layout_weight= "1" Android:gravi ty= "Center_vertical" > <textview android:id= "@+android:id/title" android:layout_width= " Wrap_content "android:layout_height=" Wrap_conTent "android:ellipsize=" marquee "android:fadingedge=" horizontal "android:singleline=" Tru E "android:textappearance="? Android:attr/textappearancemedium "/> <textview android:id=            "@+android:id/summary" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" Android:layout_alignstart= "@android: Id/title" android:layout_below= "@android: Id/title" Androi D:ellipsize= "End" android:maxlines= "2" android:textappearance= "Android:attr/textappearancesmall"/&    Gt </RelativeLayout> <!--Preference should place it actual Preference widget here. --<spinner android:id= "@+id/spinner1" android:layout_width= "Wrap_content" Android:layout_h eight= "wrap_content" android:layout_gravity= "center" android:padding= "8dip"/></linearlayout>

three: quoting a Layout file for which to specify UI, you can implement the following two callback functions:

  @Override    protected View Oncreateview (viewgroup parent) {        //TODO auto-generated method stub        return Super.oncreateview (parent);    }    @Override    protected void Onbindview (view view) {        Super.onbindview (view);        Mspinner = (Spinner) View.findviewbyid (r.id.spinner1);        string[] Arraystr = View.getresources (). Getstringarray (r.array.itemspinner_values);        Madapter = new Arrayadapter<string> (View.getcontext (), Android. R.layout.simple_spinner_dropdown_item, arraystr);        You  can also define the style of the adapter yourself        //Madapter = new arrayadapter<string> (View.getcontext (), R.layout.preference_ Categoary, mmeausstr);        Mspinner.setadapter (madapter);        Mspinner.setonitemselectedlistener (this);    }

Four: Add the required events for the build here Implements Onitemselectedlistener

    @Override public    void onitemselected (adapterview<?> parent, view view, int position, long id) {        if (Callcha Ngelistener (position)) {            setValue (position);        }    }    @Override public    void onnothingselected (adapterview<?> parent) {    }

V: Save or persist our changes

set our changes

public void SetValue (int value) {        //always persist/notify the first time.        Final Boolean changed =! Textutils.equals (Integer.tostring (Mvalue), integer.tostring (value));        if (changed | |!mvalueset) {            mvalue = value;            Mvalueset = true;            Persistint (value);            if (changed) {                notifychanged ();}}    }   @Override public    void onitemselected (adapterview<?> parent, view view, int position, long id) {        mPos = pos ition;        if (Callchangelistener (position)) {            setValue (position);        }    }

Multiple basic data types can be persisted

    @Override    protected void Onsetinitialvalue (Boolean restorevalue, Object defaultvalue) {        SetValue ( Restorevalue? Getpersistedint (Mvalue): (Integer) defaultvalue);    }

Six-effect map