Скачать или смотреть Android storing data - part 1

Contents:
What is the need of storing data?
Different options available.
Preferences
Internal Storage.
External Storage.

What is the need of storing data?
Fast access to local data. (No delay in displaying results to the user.)
No need to download same data again.
Share data between apps.
Store user settings locally.

Requirements:
Only small values: username, password, volume level etc - private only to app.
Database of all the products, database of employee details etc - private to the app.
Downloaded images, downloaded songs, downloaded PDF docs - available to user and other apps.


Private files:
Private to app, hidden from other apps and user.

Deleted when app is uninstalled.

Used for images, audios downloaded by app but not useful outside the app.

Public files:

Publically available to other apps, user.

Not deleted when app is uninstalled.

Used for songs, edited photos etc. that are made in app and useful for user.

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