SQLite and J2ME

Question

is it possible to use SQLite for a j2me application ? has anyone ever tried to do so ?

Answer 1

SQLite is not written in Java so, what you're asking for is either making it available as a non-standard Java API, via some JNI-like interface or translating most of the SQLite source code into pure java code that would presumably use a JSR75 file connection for storage.

The first solution is tantamount to adding a new JSR to the J2ME implementation on the phone, which is usually very hard if not impossible if you're not the phone manufacturer or one of its close partners.

While I haven't looked at that specific part of the source code yet, I suspect this is how the Android platform allows Java developers to use SQLite.

As far as I know, the second solution hasn't been implemented yet (or at least it hasn't been made public) so would require quite some work on your part to make it work. I would be worried about the performance implications of moving SQLite to an interpreted language with very little control on file access performance.

Answer 2

目前，我认为无法在J2ME中使用SQLite，因为没有官方支持的SQLite API，您唯一的选择是使用RecordStore或直接在文件系统中写入。