[Android] Fix app crash caused by dynamic template switching in ListView

[BagavathiPerumal]

Root cause

In the ViewCellRenderer class, the platform view was being recreated for each cell without properly removing the existing parent view (i.e., the ViewCellContainer ) before attempting to add the new view. This caused an exception:'The specified child already has a parent. You must call removeView() on the child's parent first. 'The issue arose due to improper handling of the platform view's parent when switching between different DataTemplates in a ListView using the RetainElement caching strategy in .NET MAUI.

Description of Issue Fix

The fix involved checking if the platformView already had a parent (i.e., ViewGroup) and ensuring that the parent was removed before adding the platformView to the new container. By introducing this conditional check, the system prevents the platform view from being associated with multiple parents, which caused the "The specified child already has a parent" exception. This change ensures that dynamic template changes in the ListView are handled correctly, improving view recycling and maintaining stable rendering without conflicts.

Validated the behaviour in the following platforms

• Android
• Windows
• iOS
• Mac

Issues Fixed

Fixes #24701

Output

Before fix:

After fix:

Testcase:

The Testcase is already available for this fix. Please refer to the PR link below for reference.

Clear out prototype cell when changing ItemSource by PureWeen · Pull Request #24700 · dotnet/maui (github.com)

[dotnet-policy-service]

Hey there @BagavathiPerumal! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[PureWeen]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).