feat(android): snapping for ListView/TableView

[m1ga]

work in progress / PoC

Snapping for ListView/TableView. Needs some more properties and documentation. But it is possible to add snapping to a ListView/TableView.

20211115_210628_edit.mp4

• https://developer.android.com/reference/androidx/recyclerview/widget/SnapHelper
• https://developer.android.com/reference/androidx/recyclerview/widget/LinearSnapHelper

JIRA: https://jira.appcelerator.org/browse/[TICKET]

var btn = Ti.UI.createButton({title:"snap",bottom:0});
var win = Ti.UI.createWindow({backgroundColor: 'gray'});
var snapping = true;
var listView = Ti.UI.createListView({
	snapping: snapping,
	templates: {
		test: {
			childTemplates: [{
				type: 'Ti.UI.View',
				childTemplates: [{
					type: 'Ti.UI.Label',
					bindId: 'label',
					properties: {
						color: 'black',
						bindId: 'label'
					}
				}],
				properties: {
					width: Ti.UI.FILL,
					height: 200,
					cardUseCompatPadding: true,
					backgroundColor: 'white',
				}
			}]
		}
	},
	defaultItemTemplate: 'test'
});
var section = Ti.UI.createListSection();
var items = [];

for (let i = 0; i < 100; i++) {
	items.push({
		label: {
			text: "item " + i
		},
		template: 'test'
	})
}



section.setItems(items);
listView.sections = [section];
btn.addEventListener('click', (e) => {
	snapping = !snapping;
	listView.snapping = snapping;
});
win.add(listView);
win.add(btn);
win.open();

[build]

	Fails
🚫	🔬 There are library changes, but no changes to the unit tests. That's OK as long as you're refactoring existing code, but will require an admin to merge this PR. Please see README.md#unit-tests for docs on unit testing.

	Warnings
⚠️	Tests have failed, see below for more information.
⚠️	There is no linked JIRA ticket in the PR body. Please include the URL of the relevant JIRA ticket. If you need to, you may file a ticket on JIRA

	Messages
📖	✊ The commits in this PR match our conventions! Feel free to Rebase and Merge this PR when ready.
📖	❌ 3 tests have failed There are 3 tests failing and 1157 skipped out of 20838 total tests.
📖	🎉 Another contribution from our awesome community member, m1ga! Thanks again for helping us make Titanium SDK better. 👍
📖	💾 Here's the generated SDK zipfile.

Tests:

Classname	Name	Time	Error
android.emulator.5.0.Titanium.UI.View	"after all" hook for "rgba fallback" (5.0.2)	20.41	Error: Timeout of 10000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (app.js)
android.emulator.5.0.Titanium.UI.View	"after each" hook for "getOrCreateView() should always return a View" (5.0.2)	10.367	Error: Timeout of 10000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (app.js)
android.emulator.main.Titanium.Geolocation.methods	#forwardGeocoder() works via callback argument (12)	5.013	Error: expected false to be true at Assertion.fail (/node_modules/should/cjs/should.js:275:13) at Assertion.value (/node_modules/should/cjs/should.js:356:9) at Geolocation.<anonymous> (/ti.geolocation.test.js:585:32)

Generated by 🚫 dangerJS against 436c247

[hansemannn]

iOS can do this as well: https://stackoverflow.com/questions/16088615/want-uitableview-to-snap-to-cell

[caspahouzer]

iOS can do this as well: https://stackoverflow.com/questions/16088615/want-uitableview-to-snap-to-cell

https://github.com/mbender74/ti.listviewextension this snaps listviewitems when scrolling

[m1ga]

@hansemannn any help with parity here? Would also be a nice feature