I’m still trying to implement a search function into my Android app. So far it’s going ok, although currently the search can only query one table and display the results for this table (its a ListView using SimpleCursorAdapter).
What I want is to be able to search multiple tables, but I’m not sure how to get this all into one cursor or extend the SimpleCursorAdapter to implement multiple cursors. I see there is a class called CursorJoiner, but I’m not sure what I need to do with it.
Thanks!
I have tried to make a custom cursor[] adapter, but this doesn’t return anything and my search results are blank- can anyone help?
public class SearchCursorAdapter extends SimpleCursorAdapter {
private int currentCursor;
private int curPosition = 0;
private int total = 0;
private Cursor[] curs = null;
private Context cont;
public SearchCursorAdapter(Context context, int layout, Cursor c,
String[] from, int[] to) {
super(context, layout, c, from, to);
total = c.getCount();
}
public SearchCursorAdapter(Context context, int layout, Cursor[] c,
String[] from, int[] to) {
super(context, layout, null, from, to);
int l = c.length;
for (int i = 0; i < l; i++) {
total += c[i].getCount();
}
curs = c;
currentCursor = 0;
cont = context;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
if (currentCursor == curs.length)
return null;
if (curs == null) {
//normal shiz
}
else {
Cursor c = curs[currentCursor];
c.moveToPosition(curPosition);
if (c.isAfterLast()) {
currentCursor++;
c = curs[currentCursor];
curPosition = 0;
c.moveToPosition(curPosition);
}
if (view == null) {
LayoutInflater vi = (LayoutInflater)parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = vi.inflate(R.layout.search_row, null);
}
TextView t1 = (TextView)view.findViewById(R.id.rowitem_text1);
TextView t2 = (TextView)view.findViewById(R.id.rowitem_text2);
t1.setText(c.getString(1));
t2.setText("Testing");
curPosition++;
}
return view;
just noticed that it’s not actually the adapter returning nothing, there’s something wrong with my searchactivity…
If you are using SQLite, implement a
JOINin yourSELECTstatement. If you have wrapped SQLite in a content provider for some reason, expose another contentUriand support for your multi-table search.