how to open another app(my own app) from Flutter app? - flutter

I have two applications. customer app and vendor app. How to open vendor app from customer app when click button?
Is it possible to open another application from the Flutter app?
com.demo.customer and com.demo.vendor
I tried url_launcher. but It cannot give package name and open another application.
And also I tried this package,device_apps but not working for ios.
Should be work on Android and ios.

You need to register a custom url scheme for the app you want to open.
You can read more here:
For iOS: iOS Documentation
For Android: Android Documentation
There's also a nice plugin that can handle deeplink actions for Flutter.
Flutter Uni Links
When you have registered a custom url scheme (for example: demo://vendor) you can just call that url with url_launcher plugin:
launchUrl('demo://vendor')

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If you want to open a native application selection dialog, then you should enable deep linking for your application.
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In Flutter , I have used uni_links package and followed document to succeed

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I tried to twitter sign in without "twitter_login".
Though that way needs listen to change of URL, I cannot find the way to listen to change of URL with IFrame Element, because WebView plugin is only for Android and iOS.
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How can I open a specific page of another app from my app in flutter?

I’m trying to build a functionality where i want to open the settings page of WhatsApp from a simple onTap gesture in my app. To launch WhatsApp I’m using this dependency:
https://pub.dev/packages/device_apps
However it isn’t helping me open the settings page specifically.
Is there a tool available for me to do this?
You can use this by passing the package name of the another application.
dependencies:
android_intent: ^0.3.5
WhatsApp has a URL scheme to launch the app and send a message to a phone number.
iOS Url Scheme
Android Url Scheme
But I don't think that you will be able to launch WhatsApp settings directly.

How can I open my PWA app from other native app?

I am implementing a PWA application and a native application on Android. I need to open the native app from PWA app which I know how to do that. Basically I need a URL provided from the native app and open the URL from PWA which will bring the native application. This approach is pretty much like opening google map by clicking its url: http://maps.apple.com/?address=1,Infinite+Loop,Cupertino,California..
Now I have a requirement to open my PWA from the native app. For example, if I share the PWA url through facebook, I'd like other people open the PWA app when they click on the url in facebook if they have installed the PWA.
How can I achieve that?.
You don't need to implement anything to do that. Android does it for you. For example, if your PWA is hosted on https://my-pwa.com and the user clicks a link with the href https://my-pwa.com, Android first looks through your PWAs and if the URL matches, it opens the PWA. Otherwise Android opens the Chrome browser.
Just verified this on an Android 6 device.