This page (revision-58) was last changed on 23-Apr-2022 17:06 by HarryMetske

This page was created on 23-Apr-2022 17:05 by Harry Metske

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Page revision history

Version Date Modified Size Author Changes ... Change note
58 23-Apr-2022 17:06 29 KB HarryMetske to previous
57 23-Apr-2022 17:05 29 KB HarryMetske to previous | to last
56 23-Apr-2022 17:05 28 KB HarryMetske to previous | to last
55 23-Apr-2022 17:05 26 KB Harry Metske to previous | to last
54 23-Apr-2022 17:05 26 KB Harry Metske to previous | to last
53 23-Apr-2022 17:05 24 KB Harry Metske to previous | to last
52 23-Apr-2022 17:05 24 KB 10.0.0.138 to previous | to last
51 23-Apr-2022 17:05 23 KB 10.0.0.138 to previous | to last
50 23-Apr-2022 17:05 23 KB 10.0.0.138 to previous | to last
49 23-Apr-2022 17:05 22 KB 10.0.0.138 to previous | to last
48 23-Apr-2022 17:05 22 KB 10.0.0.138 to previous | to last
47 23-Apr-2022 17:05 22 KB 10.0.0.138 to previous | to last
46 23-Apr-2022 17:05 20 KB 10.0.0.138 to previous | to last
45 23-Apr-2022 17:05 20 KB 10.0.0.138 to previous | to last
44 23-Apr-2022 17:05 20 KB HarryMetske to previous | to last
43 23-Apr-2022 17:05 19 KB HarryMetske to previous | to last
42 23-Apr-2022 17:05 19 KB Harry Metske to previous | to last
41 23-Apr-2022 17:05 19 KB Harry Metske to previous | to last

Page References

Incoming links Outgoing links
Coursera-android...nobody
Coursera-android

Version management

Difference between version and

At line 695 added 52 lines
__SharedPreferences__\\
Small amounts of primitive data.\\
A persistent map, key-values, are persisted across application sessions.
''Activity.getPreferences(mode)'' (mode=private) for one activity.\\
''Context.getSharedPreferences(name, mode)'' for data shared across multiple activities.
SharedPreferences.edit() returns a SharedPreferences.Editor object, and then things like ''putInt() putString() and remove(key)'', and finally ''Editor.commit()''.
retrieving sharedprefs:
* getAll()
* getString()
* getBoolean()
__PreferenceFragment__\\
To display and modify User Preferences.
__File Storage__
__Internal Storage__\\
Small to medium amounts of private data, private to the applications.
__File API__
''FileOutputStream.openFileOutput(String name, int mode) '' opens private file for writing, creates it if it does not exist.
__External Storage__\\
Larger amounts of data that is non-private, such as media files.
Media can appear and disappear without warning. So first determine the state of the storage, with ''Environment.getExternalStorageState()''.
* MEDIA_MOUNTED - read/write access
* MEDIA_MOUNTED_READ_ONLY
* MEDIA_REMOVED
Requires permission: __WRITE_EXTERNAL_STORAGE__
__Cache files__
* removed when storage is low
* removed when app is uninstalled
''Context.getCacheDir()'' returns absolute path to directory for temporary files.
''Context.getExternalCacheDir()''
__Databases__\\
Small to medium amounts of structured private data.
__SQLite__ is full fledged, implements most of SQL92 and supports ACID transactions (Atomic, Consistent, Isolated, Durable).\\
This page (revision-58) was last changed on 23-Apr-2022 17:06 by HarryMetskeTop