@Override
public DualControlLayout getView(int position, View convertView, ViewGroup parent) {
DualControlLayout view;
if (convertView instanceof DualControlLayout) {
view = (DualControlLayout) convertView;
} else {
view =
(DualControlLayout)
LayoutInflater.from(getContext())
.inflate(R.layout.infobar_control_spinner_view, parent, false);
}
// Set up the spinner label. The text it displays won't change.
TextView labelView = (TextView) view.getChildAt(0);
labelView.setText(mLabel);
// Because the values can be of different widths, the TextView may expand or shrink.
// Enforcing a minimum width prevents the layout from doing so as the user swaps values,
// preventing unwanted layout passes.
TextView valueView = (TextView) view.getChildAt(1);
valueView.setText(getItem(position).toString());
valueView.setMinimumWidth(mMinWidthRequiredForValues);
return view;
}
/**
* Computes and records the minimum width required to display any of the values without causing
* another layout pass when switching values.
*/
int computeMinWidthRequiredForValues() {
DualControlLayout layout = getView(0, null, null);
TextView container = (TextView) layout.getChildAt(1);
Paint textPaint = container.getPaint();
float longestLanguageWidth = 0;
for (int i = 0; i < getCount(); i++) {
float width = textPaint.measureText(getItem(i).toString());
longestLanguageWidth = Math.max(longestLanguageWidth, width);
}
mMinWidthRequiredForValues = (int) Math.ceil(longestLanguageWidth);
return mMinWidthRequiredForValues;
}