Editing a post with much text causes them to disappear

[Leilei332]

Describe the bug
When editing a post with much text, the text will disappear.

To Reproduce
Steps to reproduce the behavior:

1. Create a post
2. Input many characters, when there are a certain number of characters the text disappears:

Looks like this amount of text makes them disappear:

Details

yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihwwyy6hvuvuvuvuvucucucucucucucucuvuvuvuvuvuvuvuvuvuvugugugugugugugigihihihihh8yy6hvuvuvuvuvucucucuuuuuuuu

Expected behavior
The text shouldn't disappear.

Versions
Pachli 3.3.0

Device:

HUAWEI LND-AL30
Android 系统版本: 8.0.0
SDK 版本: 26

Account:

@XLBilly@social.vivaldi.net
版本: 4.5.6+vivaldimod

Additional content
It should have been fixed in #1770, but look like it can still be replicated.

[nikclayton]

Hi -- thanks for the report, and sorry about the problem.

I've done more investigation, and I think this is an Android bug, and I don't think Pachli can fix it.

Specifically, https://issuetracker.google.com/issues/67102093. Per that bug report, apps on devices running Android 8 can crash if hardware acceleration is used to draw editable text.

Because of this, on Android 8 devices Pachli explicitly disables hardware acceleration when writing posts (code:

pachli-android/app/src/main/java/app/pachli/components/compose/ComposeActivity.kt

Lines 732 to 737 in 803314f

	// work around Android platform bug -> https://issuetracker.google.com/issues/67102093
	if (Build.VERSION.SDK_INT == Build.VERSION_CODES.O ||
	Build.VERSION.SDK_INT == Build.VERSION_CODES.O_MR1
	) {
	binding.composeEditField.setLayerType(View.LAYER_TYPE_SOFTWARE, null)
	}

).

But without hardware acceleration the image of the text content has to be stored in main memory. If that fails (because there's not enough memory) the text suddenly disappears, which is what you're seeing.

I think this has to be properly fixed by Google. I've filed https://issuetracker.google.com/issues/481590112 about this.

I'm going to leave this issue open for a bit in case anyone else has other ideas.