Android: the best way to get an integer from a counter
I have a counter filled with integer values and I am trying to retrieve the selected value. I managed to make the following line of code:
Integer.decode(spinner.getSelectedItem().toString())
but it looks like a lot of calls to what should be a simple operation.
I am creating a counter using a string array defined like this:
In strings.xml file
<string-array name="settings_cells_array">
<item>1</item>
<item>2</item>
<item>3</item>
<item>4</item>
</string-array>
In the onCreate function:
Spinner spinner = (Spinner) findViewById(R.id.num_cells_spinner);
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.settings_cells_array, R.layout.my_layout);
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(R.layout.my_layout);
// Apply the adapter to the spinner
spinner.setAdapter(adapter);
In my opinion, since the spinner is .toString()
constructed with a string array, the call seems overkill, but I guess leaving room for flexibility with adapters and spinners built from custom objects or something similar.
Anyway, my question is this:
is there a better way to extract an integer from the above counter, or, alternatively, is there a better way to tune my counter so that it matches int s in a nicer way ?
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What you can do is first get an array from resources and then create an Integer array and pass it instead ArrayAdapter<Integer>
. Something like that:
Spinner spinner = (Spinner) findViewById(R.id.num_cells_spinner);
String[] array = getResources().getStringArray(R.array.settings_cells_array);
Integer[] intArray = new Integer[array.length];
for(int i = 0; i < array.length; i++) {
intArray[i] = Integer.parseInt(array[i]);
}
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<Integer> adapter = new ArrayAdapter<Integer>(this,
android.R.layout.simple_spinner_dropdown_item, intArray);
// Apply the adapter to the spinner
spinner.setAdapter(adapter);
Then just put the result getSelectedItem()
in Integer
:
Integer i = (Integer)spinner.getSelectedItem();
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