“Adapter makes things work after they’re designed; Bridge makes them work before they are. [GoF, p219]” Effectively, the Adapter pattern is useful when you have existing code, be it third party, or in-house, but out of your control, or otherwise not changeable to quite meet the interface you need it to. For instance, we have … Read more
Adapter adapts a given class/object to a new interface. In the case of the former, multiple inheritance is typically employed. In the latter case, the object is wrapped by a conforming adapter object and passed around. The problem we are solving here is that of non-compatible interfaces. Facade is more like a simple gateway to … Read more
There’s a combination of Federico’s and John’s answers. When: —-Shape— / \ Rectangle Circle / \ / \ BlueRectangle RedRectangle BlueCircle RedCircle Refactor to: —-Shape— Color / \ / \ Rectangle(Color) Circle(Color) Blue Red
The item view type you are returning from getItemViewType() is >= getViewTypeCount().
I had the same issue. I was adding items to my ArrayList outside the UI thread. Solution: I have done both, adding the items and called notifyDataSetChanged() in the UI thread.
Suppose your Spinner is named mSpinner, and it contains as one of its choices: “some value”. To find and compare the position of “some value” in the Spinner use this: String compareValue = “some value”; ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.select_state, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); mSpinner.setAdapter(adapter); if (compareValue != null) { int spinnerPosition = adapter.getPosition(compareValue); mSpinner.setSelection(spinnerPosition); }