Cursor is always returning null even if the database is not ...

Best Java code snippets using android.database.Cursor.isNull (Showing top 20 results out of 1,233) · SqliteMasterDao.readEntity(...) · RelationEntityDao.

2021年5月27日 — 数据库作业17：SQL练习9 – CURSOR · 游标（cursor）是系统为用户开设的数据缓冲区，存放SQL语句的执行结果。每个游标区都有一个名字，用户可以用SQL语句 ...

2019年9月24日 — NullPointerException: Attempt to invoke interface method 'int android.database.Cursor.getCount()' on a null object reference #9048. Closed.

2013年8月10日 — The CursorFactory value when create the database should be null if you don't have specific requirement. That's how I solved this problem.

... cursor is pointing to the last row. abstract boolean, isNull(int columnIndex). Returns true if the value in the indicated column is null. abstract boolean ...

2015年4月14日 — You can check to see whether or not it is empty with the following statement: if (c.moveTofirst() && c.getCount > 0). or if (c != null && c.

2019年6月1日 — How to solve null pointer exception in android? · 1. LeaveTran Activity: Expand ▽ · 2. ListView.xml · 3. ListViewActivity.java · 4. listdatalayout.

2019年7月30日 — Click on refresh button after insert values to update listview from cursor WITH NOT NULL CLAUSE. If User click on update button it will update ...

I'm new to Android, and i've got some issues. It looks like it's saying that's having an null object passed to it, but I'm not sure. Where I missed a step?

Retrieve a byte array from a cursor, or null if a byte array could not be retrieved. Retrieve a Long from a cursor, or null if a long could not be retrieved.