Helper

class Helper

A helper class which allows easy integration of ThemedSpinnerAdapter into existing SpinnerAdapters in a backwards compatible way.

An example BaseAdapter implementation would be:

public class MyAdapter extends BaseAdapter implements ThemedSpinnerAdapter {
          private final ThemedSpinnerAdapter.Helper mDropDownHelper;
     
          public CheeseAdapter(Context context) {
              mDropDownHelper = new ThemedSpinnerAdapter.Helper(context);
              // ...
          }
     
          @Override
          public View getDropDownView(int position, View convertView, ViewGroup parent) {
              View view;
     
              if (convertView == null) {
                  // Inflate the drop down using the helper's LayoutInflater
                  LayoutInflater inflater = mDropDownHelper.getDropDownViewInflater();
                  view = inflater.inflate(R.layout.my_dropdown, parent, false);
              }
     
              // ...
          }
     
          @Override
          public void setDropDownViewTheme(@Nullable Resources.Theme theme) {
              // Pass the new theme to the helper
              mDropDownHelper.setDropDownViewTheme(theme);
          }
     
          @Override
          public Resources.Theme getDropDownViewTheme() {
              // Return the helper's value
              return mDropDownHelper.getDropDownViewTheme();
          }
      }
      

Summary

Public constructors

Helper(@NonNull context: Context)

Public methods

@NonNull fun getDropDownViewInflater(): LayoutInflater

@Nullable fun getDropDownViewTheme(): Theme?

fun setDropDownViewTheme(@Nullable theme: Theme?): Unit