Develop Reference

App actions doesn't work with google assistant for Internal testing version

I developed an application with react-native and I add app actions to the application.
I followed instructions on docs and test the app by App Action Test Tools (AATT) and it worked pretty well (the invocation name is 'Test app').
After creating the preview for actions, I tried with google voice assistant directly (not just using AATT) and still it worked pretty well.
Right now I create a project in google play console with name 'MyApp' and create an Internal testing release and add another user as a tester and upload aab file for this release.
Finally I shared the google play link with tester user.
Tester user installed the app but actions doesn't work with google voice assistant!! I tried different commands, such as 'Hey google, search time in My App' and 'Hey google, search time in Test App' and etc. But non of them worked!
Do I need 'create preview' for Internal testing?
This step is not clear to me, what I need to do more to be sure the app will work with voice assistant without create preview by AATT?

Direct link to write an app review in Google Play Store

I have the following link: https://play.google.com/store/apps/details?id=com.android.chrome
If I open this link on an Android device, the Google Play Store app gets opened and shows the details of the Google Chrome app.
At iOS, it's possible to ad ?action=write-review to the link, this will not only open the app in the App Store, this will also present the Write a review window of the app, so that you can write a review without the need to click on the Write review button before.
Is there something similar for Android?

As far as I know, Android doesn't have a similar option.
However, Android supports reviewing within your application with in-app reviews.

is app indexing is necessary for instant app to show in google search

I have developed an instant app & published it into the play store, also has a website associated with the Instant App. tested the app link with the testing tool from here.
The app is opened after clicking the link from other apps (gmail, hangouts), But clicking on my website from a google search is opening as a webpage instead of instant apps. Is there anything I have to do in order to redirect a web page to the app from google search.
I had published my instant app in play store. when i click the link from gmail it opens as instant app in some devices (Samsung s6 note ,moto g4 plus)
On some devices its not opening as instant app but buzzfeed.com/tasty opens as instant app. (one plus 3 & one plus 5).
my digital asset link is https://abdcoop.mybuzztm.com/.well-known/assetlinks.json
Anyone able to suggest what i am missing?

It is not necessary to use the App Indexing API. As long as you set up App Links, that's enough. Unfortunately, it can take several weeks for the change to show up in Google search results. We do consider that a problem and are working on a way to speed it up.

Android App Indexing is not working - click on google search link still need to choose apps

I have implement app indexing for Android using this guide, my apps have been tested using this method. This apps has been deployed to Google Playstore 2 weeks ago. My website's header also been added some source code using this guide.
However, when i do search for google mobile, i dont find app indexing work. Because install button or any links to google playstore does not appear and when i clicked link to my website, it was not automatically go to my apps but appear a pop up where i need to choose my app amoung others choice.
What's wrong with my app indexing ?

Creating an android smart app banner

Is there any solution for Android devices similar to the iOS 6 smart app banner?
Here is the code for smart app banner
<meta name="apple-itunes-app" content="app-id=311507490, affiliate-data=partnerId=30&siteID=k1CkFsOh4nQ"/>

Since Chrome 44 Beta you can push your app in Chrome for Android with
a native app install banner on your website.
Please see the answer below.
Old answer
I needed that myself, so I created a jquery plugin to mimic a smart banner for Android and older iOS versions.
http://jasny.github.com/jquery.smartbanner/#android

Since Chrome 44 Beta you can push your app in Chrome for Android with a native app install banner on your website. There are a couple of criteria that need to be met in order to enable it:
You will need a web app manifest file
You will have to serve your web using https
The user has visited your site twice over two separate days during the course of two weeks.
Read more about it in the official docs from Google.

You add the Google Sign-In button to your page with a special parameter and then users can sign in and specify which device to install your app to directly from your website.
This is the most "officially supported" implementation I know of:
https://developers.google.com/identity/sign-in/web/android-app-installs
From the link:
By adding the Google Sign-In button to your web site, you can automatically prompt your users to download your Android app over the air to their Android devices. To enable this feature, you must use the same Google Developers Console project for your Web and Android clients, and configure your web app's sign-in button.
Your web app must use the Google Sign-In button to prompt your web site users to download your app the first time that they sign in. This feature is enabled by adding the apppackagename parameter to your sign-in button.

There are two APIs available:
To detect if the app is already installed use getInstalledRelatedApps (only for Chrome 80+)
Article with general information: https://web.dev/get-installed-related-apps/
Docs and demo (web+app) with code https://www.chromestatus.com/feature/5695378309513216
Show a prompt to install your app
Article with code samples: https://web.dev/customize-install/
Documentation: https://developers.google.com/web/fundamentals/app-install-banners/native