Android Fill Spinner From Java Code Programmatically

Question

How do you fill a spinner from java code programmatically   I have a spinner in the layout like this     lt Spinner      android id    id consultation deseases       android layout width   dimen bigSpinnerWidth       android layout height   dimen bigSpinnerHeight       android prompt   string disease prompt    gt    With java code I need to create the adapter and add the items

User · Accepted Answer

you need to have a list of data that you want the spinner to display List lt String gt  spinnerArray    new ArrayList lt String gt     spinnerArray add  item1    spinnerArray add  item2     ArrayAdapter lt String gt  adapter   new ArrayAdapter lt String gt       this  android R layout simple spinner item  spinnerArray    adapter setDropDownViewResource android R layout simple spinner dropdown item   Spinner sItems    Spinner  findViewById R id spinner1   sItems setAdapter adapter     also to find out what is selected you could do something like this  String selected   sItems getSelectedItem   toString    if  selected equals  what ever the option was

User · Answer

Here is an example to fully programmatically    init a Spinner  fill it with data via a String List  resize the Spinner and add it to my View  format the Spinner font  font size  colour  padding   clear the Spinner  add new values to the Spinner  redraw the Spinner    I am using the following class vars   Spinner varSpinner  List lt String gt  varSpinnerData   float varScaleX  float varScaleY        A - Init and render the Spinner  varRoot is a pointer to my main Activity    public void renderSpinner           List lt String gt  myArraySpinner   new ArrayList lt String gt          myArraySpinner add  red        myArraySpinner add  green        myArraySpinner add  blue              varSpinnerData   myArraySpinner       Spinner mySpinner   new Spinner varRoot                       varSpinner   mySpinner       ArrayAdapter lt String gt  spinnerArrayAdapter   new ArrayAdapter lt String gt  varRoot  android R layout simple spinner item  myArraySpinner       spinnerArrayAdapter setDropDownViewResource android R layout simple spinner dropdown item      The drop down vieww     mySpinner setAdapter spinnerArrayAdapter     B - Resize and Add the Spinner to my View       FrameLayout LayoutParams myParamsLayout   new FrameLayout LayoutParams              FrameLayout LayoutParams MATCH PARENT               FrameLayout LayoutParams WRAP CONTENT       myParamsLayout gravity   Gravity NO GRAVITY                    myParamsLayout leftMargin    int   100   varScaleX       myParamsLayout topMargin    int   350   varScaleY                    myParamsLayout width    int   300   varScaleX        myParamsLayout height    int   60   varScaleY          varLayoutECommerce Dialogue addView mySpinner  myParamsLayout     C - Make the Click handler and use this to set the font       mySpinner setOnItemSelectedListener new OnItemSelectedListener               Override         public void onItemSelected AdapterView lt   gt  parentView  View selectedItemView  int myPosition  long myID                 Log i  renderSpinner - gt      onItemSelected      myPosition         myID                  TextView  parentView getChildAt 0   setTextColor Color GREEN                 TextView  parentView getChildAt 0   setTextSize TypedValue COMPLEX UNIT PX   int   varScaleY   22 0f                   TextView  parentView getChildAt 0   setPadding 1 1 1 1                         Override         public void onNothingSelected AdapterView lt   gt  parentView                   your code here                            D - Update the Spinner with new data   private void updateInitSpinners          String mySelected   varSpinner getSelectedItem   toString         Log i  TPRenderECommerce Dialogue - gt      updateInitSpinners - gt  mySelected      mySelected          varSpinnerData clear          varSpinnerData add  Hello World         varSpinnerData add  Hello World 2            BaseAdapter  varSpinner getAdapter    notifyDataSetChanged         varSpinner invalidate         varSpinner setSelection 1           What I have not been able to solve in the updateInitSpinners  is to do varSpinner setSelection 0   and have the custom font settings activated automatically   UPDATE   This  ugly  solution solves the varSpinner setSelection 0   issue  but I am not very happy with it   private void updateInitSpinners         String mySelected   varSpinner getSelectedItem   toString        Log i  TPRenderECommerce Dialogue - gt      updateInitSpinners - gt  mySelected      mySelected         varSpinnerData clear         ArrayAdapter lt String gt  spinnerArrayAdapter   new ArrayAdapter lt String gt  varRoot  android R layout simple spinner item  varSpinnerData       spinnerArrayAdapter setDropDownViewResource android R layout simple spinner dropdown item        varSpinner setAdapter spinnerArrayAdapter           varSpinnerData add  Hello World        varSpinnerData add  Hello World 2           BaseAdapter  varSpinner getAdapter    notifyDataSetChanged        varSpinner invalidate        varSpinner setSelection 0           Hope this helps

[android] Android : Fill Spinner From Java Code Programmatically

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