Here you can find the source of isNull(String columnName)
public boolean isNull(String columnName)
import android.database.CharArrayBuffer; import android.database.Cursor; import android.provider.BaseColumns; public class Main{ public static boolean isNull(Cursor cursor, String columnName) { return cursor.isNull(cursor.getColumnIndex(columnName)); }// w w w .j a va 2s . c om public boolean isNull(String columnName) { return isNull(cursor, columnName); } }