Summary: Sometimes the main component name is not known at activity construction time and depends on e.g. reading shared preferences. To support this use case, make `(Fragment)ReactActivity#getMainComponentName()` nullable and return `null` by default. In this case, the app will not be loaded in `onCreate` by default and the user has to call `loadApp` manually once the component name is known.
Reviewed By: andreicoman11
Differential Revision: D3722517
fbshipit-source-id: 062eed158798606e4160f1c142b23fd98ca618c8
Summary:
The Android lifecycle is weird: turns out `onActivityResult` is called before `onResume`. This means `getCurrentActivity()` could return the wrong instance, or `null` if the activity was destroyed. To give developers access to the Activity receiving the result (which is also about to become the current activity), pass it as an argumento the listener.
Fixes github issue #8694.
Reviewed By: donyu
Differential Revision: D3704141
fbshipit-source-id: e7e00ccc28114f97415e5beab8c9b10cb1e530be
Summary: Add FragmentActivity-based ReactFragmentActivity to support apps using the v4 support lib. Add delegate class to share implementation details between the new class and ReactActivity.
Reviewed By: astreet
Differential Revision: D3655428
fbshipit-source-id: d3ff916538e13b6f0d594bbb91555e322645e954
