列「swimm_lap」(文字列として格納された数値) の合計を追加して、テキストビューに表示するにはどうすればよいですか。...select sum(swimm_lap) ....from のようなものを追加しようとしています
ここに私がアダプターに持っているものがあります
public Cursor Query(String filter, String date_filter, String lap_filter) {
if (date_filter == null & lap_filter == null){
int sum = 0;
Cursor cursor = database.rawQuery
("select sum(swimm_lap) _id,swimm_pos,swimm_date, swimm_lap,swimm_stroke,swimm_time,swimm_media,swimm_efficiency,swimm_note from swimm_table order by cast("+filter+" as integer) asc", null);
if (cursor.moveToFirst())
{sum = cursor.getInt(0);}
return cursor;}
そしてメイン活動中
totallap = (TextView) findViewById(R.id.total_lap);
totallap.setText(String.valueOf(sum));
public void Bindadapter() {
datasource.open();
Cursor cursor = datasource.Query(filter, date_filter, lap_filter);
String[] columns = new String[] { "swimm_pos", "swimm_date","swimm_lap","swimm_stroke", "swimm_time", "swimm_media", "swimm_efficiency", "swimm_note" };
int[] to = new int[] { R.id.swimm_pos, R.id.swimm_date, R.id.swimm_lap, R.id.swimm_stroke, R.id.swimm_time, R.id.swimm_medialap, R.id.swimm_efficiency, R.id.swimm_note};
SimpleCursorAdapter adapter = new SimpleCursorAdapter(
this,
R.layout.list_layout,
cursor,
columns,
to);
adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
if (view.getId() == R.id.total_lap)
{
sum = cursor.getInt(0);
String s = String.valueOf(sum);
TextView tv = (TextView)view;
tv.setText(s);
return true;
}