Deprecated

• As Android Versions keep being updated, many APIs and their methods are being revised.
• Even though those API’s methods get deprecated, developers can still use the methods. (but they will see compiler’s warning)
• However, developers are discouraged to keep using these methods because it is dangerous or there is better alternatives.

 

Example

• android.widget.TimePicker
  • Method name changed more simple
• Android.support.v4.view.PagerAdapter
  • View in parameter changed to ViewGroup
  • Reason: This makes it more obvious what the parameter refers to, improves the readability of the code and removes the need to constantly cast the Views to ViewGroups.
  • https://android-developers.googleblog.com/2011/08/horizontal-view-swiping-with-viewpager.html
• android.content.res.Resources
  • In Android 21(Lollipop) introduced some new theme attributes.
  • So if I use deprecated getDrawable() to obtain a drawable with them attributes, logcat gives a warning.
  • http://techcalibrator.com/android-getdrawable-deprecated-api-22-alternative/