/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
* @author paulburke
*/
private static string GetDataColumn(Context context, Uri uri, string selection, string[] selectionArgs)
{
ICursor cursor = null;
string column = "_data";
string[] projection =
{
column
};
try
{
cursor = context.ContentResolver.Query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.MoveToFirst())
{
#if DEBUG
DatabaseUtils.DumpCursor(cursor);
#endif
int column_index = cursor.GetColumnIndexOrThrow(column);
return(cursor.GetString(column_index));
}
}
catch
{
}
finally
{
if (cursor != null)
{
cursor.Close();
}
}
return(null);
}