internal virtual void changeCursor(android.database.Cursor cursor, bool releaseCursors
)
{
if (cursor == this.mCursor)
{
return;
}
this.deactivate();
this.mCursor = cursor;
if (cursor != null)
{
cursor.registerContentObserver(this.mContentObserver);
cursor.registerDataSetObserver(this.mDataSetObserver);
this.mRowIDColumn = cursor.getColumnIndex("_id");
this.mDataValid = true;
// notify the observers about the new cursor
this._enclosing.notifyDataSetChanged(releaseCursors);
}
else
{
this.mRowIDColumn = -1;
this.mDataValid = false;
// notify the observers about the lack of a data set
this._enclosing.notifyDataSetInvalidated();
}
}
/// <summary>Gets the value of a string column by name.</summary>
/// <remarks>Gets the value of a string column by name.</remarks>
/// <param name="cursor">Cursor to read the value from.</param>
/// <param name="columnName">The name of the column to read.</param>
/// <returns>
/// The value of the given column, or <code>null</null>
/// if the cursor does not contain the given column.
/// </returns>
public static string getColumnString(android.database.Cursor cursor, string columnName
)
{
int col = cursor.getColumnIndex(columnName);
return getStringOrNull(cursor, col);
}
internal MyCursorHelper(CursorTreeAdapter _enclosing, android.database.Cursor cursor
)
{
this._enclosing = _enclosing;
bool cursorPresent = cursor != null;
this.mCursor = cursor;
this.mDataValid = cursorPresent;
this.mRowIDColumn = cursorPresent ? cursor.getColumnIndex("_id") : -1;
this.mContentObserver = new android.widget.CursorTreeAdapter.MyCursorHelper.MyContentObserver
(this);
this.mDataSetObserver = new android.widget.CursorTreeAdapter.MyCursorHelper.MyDataSetObserver
(this);
if (cursorPresent)
{
cursor.registerContentObserver(this.mContentObserver);
cursor.registerDataSetObserver(this.mDataSetObserver);
}
}
public override void changeCursor(android.database.Cursor c)
{
if (mClosed)
{
android.util.Log.w(LOG_TAG, "Tried to change cursor after adapter was closed.");
if (c != null)
{
c.close();
}
return;
}
try
{
base.changeCursor(c);
if (c != null)
{
mText1Col = c.getColumnIndex(android.app.SearchManager.SUGGEST_COLUMN_TEXT_1);
mText2Col = c.getColumnIndex(android.app.SearchManager.SUGGEST_COLUMN_TEXT_2);
mText2UrlCol = c.getColumnIndex(android.app.SearchManager.SUGGEST_COLUMN_TEXT_2_URL
);
mIconName1Col = c.getColumnIndex(android.app.SearchManager.SUGGEST_COLUMN_ICON_1);
mIconName2Col = c.getColumnIndex(android.app.SearchManager.SUGGEST_COLUMN_ICON_2);
mFlagsCol = c.getColumnIndex(android.app.SearchManager.SUGGEST_COLUMN_FLAGS);
}
}
catch (System.Exception e)
{
android.util.Log.e(LOG_TAG, "error changing cursor and caching columns", e);
}
}
