android change text color of items in spinner

android, colors, spinner, text

Solution

I figured out that to make this work you have to override the getDropDownView when setting up the ArrayAdapter in the main activity.

public class main extends Activity {  
     @Override 
     public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);   
        setContentView(R.layout.main);  

        PatchedSpinner pSpinner = (PatchedSpinner) findViewById(R.id.spinner2); 
        ArrayList<String> testarray = new ArrayList<String>();
        testarray.add("item0");
        testarray.add("item1");
        testarray.add("item2");
        testarray.add("item3");
        ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item, testarray) {

           @Override      
           public boolean isEnabled(int position) {
               return position != 1;                             
           }

           @Override                
           public boolean areAllItemsEnabled() {
               return false;
           }

           @Override
           public View getDropDownView(int position, View convertView, ViewGroup parent){
               View v = convertView;
               if (v == null) {
                   Context mContext = this.getContext();
                   LayoutInflater vi = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                   v = vi.inflate(R.layout.row, null);
               }

               TextView tv = (TextView) v.findViewById(R.id.spinnerTarget);
               tv.setText(testarray.get(position));

               switch (position) {
                   case 0:
                       tv.setTextColor(Color.RED);  
                       break; 
                   case 1:
                       tv.setTextColor(Color.BLUE);
                       break;
                   default:
                       tv.setTextColor(Color.BLACK);
                       break;
               }
               return v;  
           }              
        };

        pSpinner.setAdapter(spinnerAdapter); 
}

The layout that is being inflated is a custom layout called row.xml. it is used to set the display for the dropdown view.

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/spinnerTarget"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="14pt" />

Problem

I have a spinner where in certain conditions some options should not be selectable. I have the code to make items not selectable but it does not grey out text color to specify that the item is not selectable. How would I change the text color of the items in the spinner that should be disabled? Here is the code: ``` public class main extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); PatchedSpinner pSpinner = (PatchedSpinner) findViewById(R.id.spinner2); ArrayList<String> testarray = new ArrayList<String>(); testarray.add("item0"); testarray.add("item1"); testarray.add("item2"); testarray.add("item3"); ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, testarray) { @Override public boolean isEnabled(int position) { return position != 1; } public boolean areAllItemsEnabled() { return false; } }; pSpinner.setAdapter(spinnerAdapter); } ``` Below is the Custom Spinner Class used to create a spinner that is able to disable certain items in the spinner. ``` public class PatchedSpinner extends Spinner { public PatchedSpinner(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public PatchedSpinner(Context context) { super(context); } public PatchedSpinner(Context context, AttributeSet attrs) { super(context, attrs); } @Override public boolean performClick() { // this line removed, we do not want to delegate the click to the spinner. // boolean handled = super.performClick(); Context context = getContext(); final DropDownAdapter adapter = new DropDownAdapter(getAdapter()); CharSequence mPrompt = getPrompt(); AlertDialog.Builder builder = new AlertDialog.Builder(context); if (mPrompt != null) { builder.setTitle(mPrompt); } builder.setSingleChoiceItems(adapter, getSelectedItemPosition(), this).show(); return true; } private static class DropDownAdapter implements ListAdapter, SpinnerAdapter { private SpinnerAdapter mAdapter; public DropDownAdapter(SpinnerAdapter adapter) { mAdapter = adapter; } public int getCount() { return mAdapter == null ? 0 : mAdapter.getCount(); } public Object getItem(int position) { return mAdapter == null ? null : mAdapter.getItem(position); } public long getItemId(int position) { return mAdapter == null ? -1 : mAdapter.getItemId(position); } public View getView(int position, View convertView, ViewGroup parent) { return getDropDownView(position, convertView, parent); } public View getDropDownView(int position, View convertView,ViewGroup parent) { if (mAdapter == null) { return null; } mAdapter.getDropDownView(position, convertView, parent); } public boolean hasStableIds() { return mAdapter != null && mAdapter.hasStableIds(); } public void registerDataSetObserver(DataSetObserver observer){ if (mAdapter != null) { mAdapter.registerDataSetObserver(observer); } } public void unregisterDataSetObserver(DataSetObserver observer) { if (mAdapter != null) { mAdapter.unregisterDataSetObserver(observer); } } // PATCHED public boolean areAllItemsEnabled() { if (mAdapter instanceof BaseAdapter) { return ((BaseAdapter) mAdapter).areAllItemsEnabled(); } else { return true; } } // PATCHED public boolean isEnabled(int position) { if (mAdapter instanceof BaseAdapter) { return ((BaseAdapter) mAdapter).isEnabled(position); } else { return true; } } public int getItemViewType(int position) { return 0; } public int getViewTypeCount() { return 1; } public boolean isEmpty() { return getCount() == 0; } } } ```

Original source