I wrote a small activity which illustrates some crazy behavior I found
while implementing ListView and choices. Feel free to plug this in
and try it yourselves (and be sure to check logcat as well):
public class TestActivity extends ListActivity {
public String[] strings = { "What","the","devil","is","happening?" };
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.listview);
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
getListView().setAdapter(new
ArrayAdapter<String>(this,R.layout.main,strings));
getListView().setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2,
long arg3) {
Log.d("test","Checked: "+
((TextView)getListView().getChildAt(arg2)).getText().toString());
if (getListView().isItemChecked(arg2))
{
for (int i=0;
i<getListView().getChildCount(); i++)
{
if (i==arg2)
getListView().getChildAt(i).setBackgroundColor(Color.MAGENTA);
else
getListView().getChildAt(i).setBackgroundColor(Color.TRANSPARENT);
}
}
else
getListView().getChildAt(arg2).setBackgroundColor(Color.TRANSPARENT);
}
});
}
}
The R.layout.main is just your standard default TextView when you
create a new project in Eclipse. The R.layout.listview is the
standard LinearLayout with embedded ListView for ListActivities shown
below:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<ListView android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
Can anyone explain rationally what is causing this to happen?
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