Sample DB project

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http://stackoverflow.com – I am very new to Android , I would appreciate if you can guide me in developing an Application which uses text database , Audio and video. My concern...... 1. Sample code to use existing SQLITE database and store it in SDCARD..... 2. Hardware requirement to maintain an Application has huge size of Audio & Video files approx 30 Gb.... 3. Sample project which has a listview from sqlite database, text to voice , downloading Audio from the server , bookmark etc features. Thank you for your support. (HowTos)