Facebook Android SDK Tips Part 1: LikeView Bugs and Fixes

Official Reference: LikeView Reference

BUG #1: The developers or testers cannot access the Like Page

1. Check the internet connection.

2. Check if the page is allowed to be liked.

3. Check the account of developers or testers have the permission of developer or tester under the APP ID.

4. Check Facebook App support before initialize LikeView, and DO NOT just check the installation of Facebook App. For some lower version of Facebook App, things may not work properly. Using SDK for checking as following:
 
    if (Build.VERSION.SDK_INT >= 15) {
        if (LikeDialog.canShowNativeDialog() || LikeDialog.canShowWebFallback()) {
        }
    }

BUG #2: Crash when initializing

1. DO NOT initialize LikeView in your layout.xml as the Official guide recommended, which is unsafe for API level < 15. ( min version for FB SDK 4.10 ) All of the FB SDK method should be used after API level judgement.
2. If you only want to open LikeDialog in Facebook App and only use `LikeDialog.canShowNativeDialog()` for judgement, LikeDialog may fail to open after swipe all the data of Facebook App. I recommend to use web dialog just in case.

BUG #3: Crash in onActivityResult() 

Stack overflow give a way to get the like result in onActivityResult() method. But it should add a `data != null` judgment, otherwise app will crash when not data returns.

BUG #4: Native Like Button permission

App Review should be done to get Native Like Button permission. Otherwise, only developers and test users can access like button.