Redirecting to Google Play store, if app is not installed while launching android app from browser

Question

I am launching android app from browser. I write the below code in manifest for launching app from browser & launching successfully,

<intent-filter>
<data
    android:scheme="myapp"
    android:host="myhostname" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />

My requirement is like I have to redirect to google play store, if the app is not installed.

How can I achieve that?

Answer 1

Adding the intent filter is good, but here's what I do to open an intent on an android device when the user agent matches as such. I'm specifically using rails but you can do it however you like in your server code (such as in the form of a link):

resources :users, path: '/', only: [], constraints: { :id => /\d+/ } do
  constraints :user_agent => /Android/i do
    #https://developers.google.com/chrome/mobile/docs/intents
    get '/:some_key' => redirect {|params, request| "intent://my-domain.com/#{params[:user_id]}/#{params[:some_key}#Intent;package=com.mypackage;scheme=myscheme;end;"}
  end
end

In your intent filter use the custom scheme:

<data android:scheme="myscheme"/>
<data android:host="my-domain.com"/>

See https://developers.google.com/chrome/mobile/docs/intents as it gives this example:

<a href="intent://scan/#Intent;scheme=zxing;package=com.google.zxing.client.android;end"> Take a QR code </a>

Note: By giving the qualified package name this way, Android will direct the user to the play store for the app matching that package key if it is not installed.