xamarin/Xamarin.Forms

[Android] Incorrect row height calculation in ListView Layout when using ImageSource.FromStream

Open

#6,870 opened on Jul 14, 2019

View on GitHubContributor guide
 (1 comment) (1 reaction) (0 assignees)C# (1,926 forks)batch import
4.1.0a/listviewe/4 :clock4:help wantedi/regressionp/Androidt/bug :bug:up-for-grabs

Repository metrics

Stars
 (5,644 stars)
PR merge metrics
 (No merged PRs in 30d)

Description

Description

Incorrect row height calculation in ListView Layout when using ImageSource.FromStream to set Image.Source

Steps to Reproduce

  1. Run attached project

Expected Behavior

Correct row Hight

Actual Behavior

Incorrect row Hight

Basic Information

  • Version with issue: 3.4 to 4.1
  • Last known good version:
  • IDE:
  • Platform Target Frameworks:
    • Android:
  • Nuget Packages:

Screenshots

image

Reproduction Link

App5.zip

Contributor guide

Research direction
Examine the Android ListView adapter's row height computation when images are loaded asynchronously via ImageSource.FromStream. Check if the height is calculated before the image is fully loaded, and how the image size affects the measurement. Look for any custom measure hooks or caching issues that might lead to incorrect heights.
Tech stack
csharpandroid
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
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.FormsAndroid development
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75