Develop Reference

Android App Link - Testing the flow in local environment

I'm trying to check how App Links work on android.
Here is what I have done so far -
Set up a local server with MAMP, apache points to port 80.
Created .well-known in the htdocs & also put the assetlinks.json in the created dir.
I am able to access it using - http://192.168.0.78/.well-known/assetlinks.json
where 192.168.0.78 is my lan ip. I generated the SHA using the keytool command.
Here are the contents of the file assetlinks.json:
[{
"relation": ["delegate_permission/common.handle_all_urls"],
"target": {
"namespace": "android_app",
"package_name": "com.pbc.deeplinking_demo",
"sha256_cert_fingerprints":
["D9:29:00:B9:30:F1:24:A0:E7:7A:58:74:43:C6:06:FF:F6:16:BB:42:F3:A2:16:10:5D:81:27:37:3A:E5:A6:14"]
}
}]
Set up an android app with the applicationId : com.pbc.deeplinking_demo
Added the intent-filters with autoVerify=true to the activity
implementation below -
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" />
<data
android:host="192.168.0.78" />
</intent-filter>
</activity>
With this config, I continue to see the disambiguation dialog asking me to choose between the default browser and the target app.
Note: I am able to access the mamp page & also the assetlinks.json from Chrome on Android emulator.
Am I missing something here or is it not possible to test this in local environment?

Import APK on Play Store

I have some difficulties while importing my first APK on Play Store. A simple WebView App.
I have this error message :
Importation error.
The domain name "https://chimeria.net" you specified is not valid
Enter a valid domain name.
Where https://chimeria.net is the url of the embeded website in the WebView...
After the documentation I read (https://developers.google.com/digital-asset-links/v1/getting-started):
I created a json file at
https://chimeria.net/.well-known/assetlinks.json
I took the SHA256 value from My Developer play store page, at the tab Application Signature.
screenshot of where i picked up the SHA546 KEY
I added this line in the AndroidManifest.xml of the app:
<meta-data android:name="asset_statements" android:resource="#string/asset_statements" />
I added this in the res/values/strings.xml file of the app
<string name="asset_statements">
[{
\"relation\": [\"delegate_permission/common.share_location\"],
\"target\": {
\"namespace\": \"web\",
\"site\": \"https://chimeria.net\"
}
}]
</string>
Later in my manifest file, I declared
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" android:host="https://chimeria.net" />
<data android:scheme="https" />
</intent-filter>
The app was created with Android Studio (Android App Bundle) that gave me an .aab file.
No matter what I tried, my app was refused because the link was not accepted.
And finnaly I wasted all possible attemple in a day.
Would somebody know what I am doing wrong ?
Thanks you for your help

chimeria.net is the host, https or http is the scheme.
You probably want to change your manifest to:
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" android:host="chimeria.net" />
<data android:scheme="https" android:host="chimeria.net" />
</intent-filter>

App links not working

In my application I want to use app links.
For this in my AndroidManifest.xml I am defining activity as :
<activity
android:name="com.abc.xyz.DeepLinkActivity"
android:screenOrientation="portrait"
android:theme="#style/AppTheme.Transparent">
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.BROWSABLE"/>
<data
android:host="*.example.com"
android:scheme="https"/>
<data
android:host="*.example.com"
android:scheme="http"/>
</intent-filter>
</activity>
and for this I am defining assetlinks.json as :
{
"relation": ["delegate_permission/common.handle_all_urls"],
"target": {
"namespace": "android_app",
"package_name": "com.abc.xyz",
"sha256_cert_fingerprints": ["10:0C:0C:C2:78:EA:3B:DA:CA:A3:43:57:D1:8B:EE:62:15:E6:08:99:77:F1:F7:F1:DF:9E:DF:3C:92:04:B8:62"]
}
}
where fingerprint is defult android debug keystore fingerprint.
Only thing to point is that we are hosting assetslink.json at https://www.example.com/.well-known/assetlinks.json domain and not at
https://example.com/.well-known/assetlinks.json domain.
Can it be the cause. I seem to have been following all the guideline present at
https://developer.android.com/training/app-links/verify-site-associations.html#request-verify

As pointed out here android doesn't handle wildcards, so you should probably change
<data
android:host="*.example.com"
android:scheme="https"/>
to
<data
android:host="example.com"
android:scheme="https"/>
You can also use https://developers.google.com/digital-asset-links/tools/generator to test if site verifies your app.

You should have at least one active APK that is mapped to site 'sample.com' via a web 'intent-filter'

Trying to upload instant application but getting this error
You should have at least one active APK that is mapped to site 'sample.com' via a web 'intent-filter'.
<activity
android:name=".ui.InstantSplash"
android:screenOrientation="portrait"
android:theme="#style/splashScreenTheme">
<meta-data
android:name="default-url"
android:value="https://sample.com/base-app/salt_one" />
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter
android:autoVerify="true"
tools:targetApi="m">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" />
<data android:host="sample.com" />
<data android:pathPrefix="/base-app" />
<data android:scheme="https" />
</intent-filter>
</activity>

Upload installable APK in alpha, beta or production with same HOST web 'intent-filter'.

You are defining an Intent filter with the scheme and host:
<data android:scheme="http" />
<data android:host="sample.com" />
so you have to access your deep links with
http://sample.com
but this domain must be a valid domain, and this domain must be of your property because you need to add the assetlinks.json
The website www.example.com publishes a statement list at
https://www.example.com/.well-known/assetlinks.json. This is the
official name and location for a statement list on a site; statement
lists in any other location, or with any other name, are not valid for
this site. In our example, the statement list consists of one
statement, granting its Android app the permission to open links on
its site:
[{
"relation": ["delegate_permission/common.handle_all_urls"],
"target" : { "namespace": "android_app", "package_name": "com.example.app",
"sha256_cert_fingerprints": ["hash_of_app_certificate"] }
}]
Read more about it:
https://developers.google.com/digital-asset-links/v1/getting-started#quick-usage-example

Instant apps does not support HTTP. Your default-url should be HTTPS
<meta-data
android:name="default-url"
android:value="https://sample.com/base-app/salt_one" />

Your app must also define a default URL for your app. Within the same Android manifest as your entry-point activity, you define the default URL for your app by adding a element with a value attribute that provides a valid HTTPS URL that the activity can handle. Further, this default url must also be part of the CATEGORY_LAUNCHER activity's intent filter in the installed app.
The following code snippet shows an Android manifest that defines an entry-point activity and default URL for an instant app.
<activity
android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter android:autoVerify="true">
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="http" />
<data android:scheme="https" />
<data android:host="example.com" />
</intent-filter>
<meta-data
android:name="default-url"
android:value="https://www.example.com/index.html" />
</activity>
Instant apps does not support HTTP. Your default-url should be HTTPS
For more details can you check android AIA documentation.
There is some inappropriate string for error message, can you ensure fix with, installable APK in alpha, beta or production with same HOST web 'intent-filter'.

Linking app through Digital Asset Link protocol

My problem is that uploading my signed APK for my android instant app to google play console gives me the following error:
Your site 'anam-instant.mybluemix.net' has not been linked through the Digital Assets Link protocol to your app. Please link your site through the Digital Assets Link protocol to your app.
I have a single base module, with the AndroidManifest.xml intent filter as follows:
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter
android:autoVerify="true"
android:order="1" >
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
<data android:scheme="https" />
<data android:scheme="http" />
<data android:host="MYURL.net" />
<data android:pathPrefix="/hello" />
</intent-filter>
<meta-data
android:name="default-url"
android:value="https://MYURL.net/hello"/>
At /.well-known/assetlinks.json
[
{
relation: [
"delegate_permission/common.handle_all_urls"
],
target: {
namespace: "android_app",
package_name: "com.example.anam.my_instantapp",
sha256_cert_fingerprints: ["SHA256-CERT"]
}
}
]
I have Google app signing enabled and got my sha256 cert from there, using the Upload certificate.
I have verified that the package name is the same as the package name in the base module's AndroidManifest.xml.
I have verified that my robots.txt allows all.
I'm trying to release this under Instant app development.