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Android Android Fragments Managing Fragments Adding the ViewPager

Posted by tshuutheniemvula
tshuutheniemvula
7,251 Points

SmellsLikeBacon crash on orientation change, cannot cast ViewPagerFragment to ListFragment

So everything works as instructed but when I change orientation on my phone (SMT211) app crashes, stacktrace:

04-21 12:57:52.905 21194-21194/com.thetechguysblog.smellslikebacon E/AndroidRuntime: FATAL EXCEPTION: main Process: com.thetechguysblog.smellslikebacon, PID: 21194 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.thetechguysblog.smellslikebacon/com.thetechguysblog.smellslikebacon.MainActivity}: java.lang.ClassCastException: com.thetechguysblog.smellslikebacon.ViewPagerFragment cannot be cast to com.thetechguysblog.smellslikebacon.ListFragment

Just putting it out there.

Taylor Bryant
Taylor Bryant
7,395 Points

Go to the video named "Initializing a Fragment with data" in this same section at 3:45 in the video and he explains how to fix it.

Essentially in the MainActivity when you first create the fragment and use the findFragmentById(R.id.placeholder) it will retrieve the ViewPagerFragment if thats the one you are on. To fix this you need to set a tag for each fragment and use findFragmentByTag([TAG_NAME]) instead.