You can use Microsoft Flow to create logic that performs one or more tasks when an event occurs in an app. For example, configure a button so that, when a user selects it, an item is created in a SharePoint list, an email or meeting request is sent, a file is added to the cloud, or all of these. You can configure any control in the app to start the flow, which continues to run even if you close PowerApps.
Sign in to powerapps.com, and then select Flows in the left-hand navigation bar.
On the My Flows page, select Create from blank.
In the box that says Search for more triggers, type or paste PowerApps, and then select the PowerApps option.
Select New step, and then select Add an action.
In the box that says Search for more actions, specify an action for your flow.
Type SharePoint in the box, and then select SharePoint - Create item in the list under that box.
If prompted, provide credentials to connect to SharePoint.
In the SITE URL box, type or paste the URL of a SharePoint Online site that contains a list.
Note: Specify the URL for the site itself, not including the list.
In the LIST NAME box, select the list that you want to use.
Click or tap the TITLE box, and then select Add dynamic content.
In the list of parameters, select Ask in PowerApps.
Near the top of the screen, type or paste a name for your flow, and then select Create flow.
In PowerApps, select New in the File menu (near the left edge of the screen).
On the Blank app tile, select Phone layout.
Add a Text input control, and name it RecordTitle.
Add a Button control, and move it under RecordTitle.
With the Button control selected, select Flows on the Action tab.
In the pane that appears, select the flow that you created in the previous procedure.
In the formula bar, type or paste RecordTitle.Text) at the end of the formula that's been automatically added.
Open Preview by pressing F5 (or by selecting the arrow near the upper-right corner).
Type or paste text in RecordTitle, and then click the Button control.
A SharePoint item is created in the list you specified with the text you specified as the title.