Android Object Relational Mapping Databases

Introduction

Object-Relational Mapping (ORM) is a technique that lets you query and manipulate data from a database using an object-oriented paradigm. When talking about ORM, most people are referring to a library that implements the Object-Relational Mapping technique,

GreenDAO

greenDAO is an open source Android ORM making development for SQLite databases fun again. It relieves developers from dealing with low-level database requirements while saving development time. SQLite is an awesome embedded relational database. Still, writing SQL and parsing query results are quite tedious and time-consuming tasks. greenDAO frees you from these by mapping Java objects to database tables (called ORM, “object/relational mapping”). This way you can store, update, delete, and query for Java objects using a simple object oriented API. The advantages are

Maximum performance (probably the fastest ORM for Android)

Easy to use powerful APIs covering relations and joins

Minimal memory consumption

Database encryption: greenDAO supports SQLCipher to keep your user’s data safe

Small library size (<100KB) to keep your build times low and to avoid the 65k method limit...(Read More)