Local database in j2me midp 1.0

问题:

I am developing one application in J2me MIDP 1.0

It requires local database management. I have heard about recordStore but can we use it for permanent storage?

回答1:

Yes, your application can store data using a RecordStore, and you can get it back later even if the application or the phone has been shut down.

EDIT:

One example I found: http://www.roseindia.net/j2me/read-write-midlet.shtml

回答2:

RecordStore, or more generally, MIDP RMS API is intended just for use for permanent storage:

...The MIDP provides a mechanism for MIDlets to persistently store data and retrieve it later. This persistent storage mechanism, called the Record Management System (RMS), is modeled after a simple record-oriented database...

If you're interested in more details, refer to javax.microedition.rms package API documentation. Since you mention MIDP 1.0, make sure that you don't use API annotated as since: 2.0 in these javadocs.

Also, online tutorials are available to get you started, like:

• MIDP Database Programming Using RMS: a Persistent Storage for MIDlets
• Databases and MIDP, Part 1: Understanding the Record Management System