JingYeoh/FragmentRigger

查找tag为null，startFragment报错

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#80 opened on Jul 26, 2019

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 (1 comment) (0 reactions) (0 assignees)Java (2,262 stars) (272 forks)batch import
help wanted

Description

添加tag Fragment fragment = LoginSelectIdentityFragment.newInstance(); Rigger.getRigger(fragment).setFragmentTag(LoginSelectIdentityFragment.class.getName()); Rigger.getRigger(puppet).startFragment(fragment); 查找tag Fragment fragment = Rigger.getRigger(this) .findFragmentByTag(LoginSelectIdentityFragment.class.getName()); 这时查找的fragment总是为null，然后我又Rigger.getRigger(puppet).startFragment(LoginSelectIdentityFragment)，结果就报错了。这是为什么啊？

Contributor guide

Tech stack
javaandroid
Domain
mobile
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
unclear
Prerequisites
Android developmentFragment lifecycle understanding
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15
Research direction
The issue reports that findFragmentByTag returns null after setting a tag, and then starting the fragment again causes an error. Investigate the implementation of setFragmentTag and findFragmentByTag in FragmentRigger. Check how tags are stored and retrieved from the FragmentManager. Also examine the startFragment method to understand why a second start fails. Look at the library's test files for any existing tests related to fragment tagging.