how to display a list in android

Question

I have a String countries[].

now when i click a button then on the onClick event this abc array is filled.suppose it is filled with the name of 10 countries.These 10 countries should be visible as a list so that i can choose any 1 country among the list. but i am not able to show them as a list.

My programme crashes if i use the following code :

ListView list = (ListView)findViewById(R.id.ListView);

list.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1, countries));

As countries is filled later on the click of a button.So initially the countries array is empty and as the onCreate() is executed first it crashes.

I found the examples on net where there is pre-defined array.so it works.My array is filled in a onClick event.how can i display List at that moment???

st0le · Accepted Answer · 2010-09-23 06:51:35Z

1

Make list your member variable.

Move the setAdapter call inside your onClick()....That'll do.

answered Sep 23, 2010 at 6:51

st0le

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2 Comments

SPB Over a year ago

If i move setAdapter inside onClick it gives error: The constructor ArrayAdapter<String>(new View.OnClickListener(){}, int, String[]) is undefined

st0le Over a year ago

this should be transformed into YourActivity.this...Since your scope is within OnClickListener, this refers to its instance and not the activity's.

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