My application has a ListView displaying some items that are
associated with different documents:
// arrays.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="select_doc_dialog_items">
<item>doc type A</item>
<item>doc type B</item>
<item>doc type C</item>
<item>doc type D</item>
</string-array>
</resources>
The ListView implements an OnItemLongClickListener and displays the
available document types as follows:
public boolean onItemLongClick(AdapterView<?> av, View v, int
position, long id) {
mPositionActive = position;
mListView.invalidate(); // TODO: increase efficiency by reducing
invalidate to one item
if ((position%10) < 4) {
Toast.makeText(this, "long click position " + position " has
docs",
Toast.LENGTH_SHORT).show();
showDialog(DIALOG_DOCS_AVAILABLE);
}
else
Toast.makeText(this, "long click position " + position + " has
no docs",
Toast.LENGTH_SHORT).show();
return true;
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_DOCS_AVAILABLE:
return new AlertDialog.Builder(this)
.setTitle(R.string.select_doc_dialog)
.setItems(R.array.select_doc_dialog_items, new
DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int
which) {
/* User clicked so do some stuff */
String[] items = getResources().getStringArray
(R.array.select_doc_dialog_items);
Toast.makeText(List15.this, "You selected: " + which
+ " , " + items[which],
Toast.LENGTH_SHORT).show();
}
})
.create();
}
return null;
}
@Override
protected void onPrepareDialog(int id, Dialog dialog) {
super.onPrepareDialog(id, dialog);
Toast.makeText(List15.this, "onPrepareDialog id: " + id,
Toast.LENGTH_SHORT).show();
}
- - -
I would like to modify onPrepareDialog to filter the dialog to display
only the document types relevant for the long clicked item (like a
context menu except that some long clicks will perform a different
task: expand or collapse the hierarchy displayed in the custom
ListView). For example, if an item is long clicked that is associated
with only document types A and B, I would like the dialog to avoid
displaying document types C and D as dialog items? However, looking
at R.java, it is not clear to me what the id of an individual item in
the select_doc_dialog_items array would be.
Anyone have any tips on how to use onPrepareDialog() to filter
displayed dialog items?
Thanks and best regards,
Greg
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