После просмотра здесь: krysanify.wordpress.com/2010/11/24/… Я обнаружил недостаток в SimpleCursorAdapter, который просто предполагает, что поля будут строкой, теряющей требуемую точность
Я расширил SimpleCursorAdapterиспользовать Double в строках, которые я хотел здесь - это класс.
public class WithLongAdapter extends SimpleCursorAdapter {
private int[] mFrom;
private int[] mTo;
/**
* SimpleCursorAdapter that also checks for Double values based on rows so they will not be truncated
* @param context pass this
* @param layout the row file
* @param c the Cursors
* @param from collums on cursor
* @param to rows on list
*/
public WithLongAdapter(Context context, int layout, Cursor c,
String[] from, int[] to) {
super(context, layout, c, from, to);
mTo = to; //have to make my own to and from because they are protected in SimpleCursorAdapter
if (c != null) {
int i;
int count = from.length;
if (mFrom == null || mFrom.length != count) {
mFrom = new int[count];
}
for (i = 0; i < count; i++) {
mFrom[i] = c.getColumnIndexOrThrow(from[i]);
}
} else {
mFrom = null;
}
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
final ViewBinder binder = getViewBinder();
final int count = mTo.length;
final int[] from = mFrom;
final int[] to = mTo;
for (int i = 0; i < count; i++) {
final View v = view.findViewById(to[i]);
if (v != null) {
boolean bound = false;
if (binder != null) {
bound = binder.setViewValue(v, cursor, from[i]);
}
if (!bound) {
String text = cursor.getString(from[i]);
if (text == null) {
text = "";
} else if (R.id.row_db_latitude == v.getId()) { //added rows, if they are the ones I want get value of doulbe
text = String.valueOf(cursor.getDouble(from[i]));
}
else if (R.id.row_db_longitude == v.getId()) { //added row
text = String.valueOf(cursor.getDouble(from[i]));
}
if (v instanceof TextView) {
setViewText((TextView) v, text);
} else if (v instanceof ImageView) {
setViewImage((ImageView) v, text);
} else {
throw new IllegalStateException(
v.getClass().getName()
+ " is not a "
+ " view that can be bounds by this SimpleCursorAdapter");
}
}
}
}
}
}