xamarin/Xamarin.Forms

DependencyService does not gets registered if called by xamarin.forms project before registering

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#2,445 opened on Apr 12, 2018

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Description

Description

When DependencyService is registered before PLC project calls for the method, it works well. However if it is called before the native project registers the method, Register method in Dependency service never works again

Steps to Reproduce

Please find a sample project in the below link:

https://github.com/rags217/DSTest

  1. click set dependency1 button -> message displayed: dependency1 is set
  2. click call dependency2 button -> message displayed: dependency1 is called
  3. That works fine
  4. now try in the reverse order for second dependency
  5. click call dependency2 button -> message displayed: dependency2 is null
  6. click set dependency1 button -> message displayed: dependency2 is set
  7. click call dependency2 button AGAIN-> message displayed: dependency2 is null

Expected Behavior

in step 7 message should be dependency2 is set

Actual Behavior

in step 7 message should be dependency2 is null

Basic Information

Version with issue: 2.5.0.280555 Last known good version: N/A IDE: Xamarin Studio for Mac Platform Target Frameworks: Android: 8.0 Android Support Library Version: N/A Nuget Packages: Affected Devices: Samsung galaxy, LG variants

Screenshots

Reproduction Link

https://github.com/rags217/DSTest

Contributor guide

Research direction
Investigate the DependencyService registration lifecycle to understand why registering after a call leaves the service null.
Tech stack
csharp
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.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#Xamarin.Forms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50