Android comparisons with J2ME

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Comparing ANDROID to J2ME

If you are familiar with J2ME you might understand that Android provides a similar development platform but with a much nicer and richer UI components than J2ME (JWTI)and obviously much better than LCDUI.

I am attempting to make a comparison with J2ME and Android in the following table:

Android Building Block

J2ME Comparable

Description

Activity

Midlet

Activity is one of the so-called “Building blocks” on Google Android’s architecture. An activity is then comparable to a midlet in J2ME.

View

Canvas or Form

A View is a displayable class in which elements can draw on the screen components. This concept is similar to a Canvas or a Form (LCDUI)

Intent

Platform Request

An Intent is used to move from screen to screen. A “request to do something” could be easily matched to a Platform Request call on J2ME. In fact a URI is used as an equivalent concept

An Intent Receive is therefore a way or mechanism to be called as part of a more generic way to replace “Platform Request API” on J2Me

Service

Permanent Midlet

A service is nothing bog a Long-lived App, without a UI. There is no clear match on J2ME but some proprietary implementations using permanent midlets, however this type of midlets may still have a UI. This is not supported by most platforms except in a few like “Motorola iDEN”

Content Provider

RMS or Record Store

Android uses SQLLite database to store data from Activities, which is rather similar to RMS storage using a midlet framework

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