Develop Reference

It is mandatory to specify the "android:host" for all url in android for Deep Link?

I have to filter two URL for an activity. I'm using Deep Links to App Content by specifying a url for the Deep Link Screen.
These are my urls
appdemo://deeplink
native://
I'm already added these two scheme to my Android Manifest file, looks like
<data android:scheme="appdemo" android:host="deeplink" />
<data android:scheme="native" />
my question is that, by providing scheme and host on the Android Manifest file, native:// this link does not work. it requires the android:host name also
(native://deeplink).
It is mandatory to specify the "android:host" for all url in android?
If no, how can i specify the different scheme.

The idea beside deep links is to use the same structure as normal links:
scheme://host/path
The main benefit is that you can teach your app even to open some Internet links, e.g. to open youtube (Android will ask, if you want to open in browser or YouTube app or your app):
<intent-filter>
<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="youtube.com"/>
<data android:host="www.youtube.com"/>
<data android:host="m.youtube.com"/>
<data android:host="youtu.be"/>
<data android:pathPattern=".*"/>
</intent-filter>
So, answering your questions:
Yes, it is mandatory to specify both scheme and host.
A good practice of handling two different links in one activity is to use different paths. Like this:
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.BROWSABLE"/>
<data android:scheme="appdemo" android:host="deeplink" android:pathPrefix="/path1/"/>
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.DEFAULT"/>
<category android:name="android.intent.category.BROWSABLE"/>
<data android:scheme="appdemo" android:host="deeplink" android:pathPrefix="/path2/"/>
</intent-filter>
Then you can get your path in onNewIntent:
Uri data = intent.getData();
String path = data == null ? null : data.getPath();
...and build some logic depending on this path.

The above answer is acceptable and, in my case i want to navigate a new activity through this intent filter, and i got some information to the above answer and made some changes in my code and fix the issue.
Also I'm not specifying the host name for my second intent.
<activity
android:name=".DeepLinkActivity"
android:exported="true"
android:screenOrientation="portrait"
android:theme="#style/AppTheme.Launcher">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="appdemo" android:host="deeplink" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="native" />
</intent-filter>
</activity>
Now my both url navigate to DeepLinkActivity.
appdemo://deeplink
native://
Do you think this is not an optimized way?
Any other suggestions for that please mention.

Using Android deeplinking with the end of URL

I want to put deep linking with all the link looking like this :
https://myapp.com/*/*/quiz.html
How can I do that ? I try this intent-filter in my Manifest but the pathPrefix is not working :
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="https"
android:host="myapp.com"
android:pathPrefix="/.*/.*/quiz\\.html"/>
</intent-filter>
Without the android:pathPrefix it's working but it's opening all the links from https://myapp.com.

You have to use android:pathPattern in your data element.
<data
android:host="myapp.com"
android:pathPattern="/.*/.*/quiz.html"
android:scheme="https" />
Then you can set any url pattern you want to open in your app. Read documentation . Also, here is good explanation about how it works.

Android deep links url pattern

I want to include deep links handle in my Android app. But I can't find how we can register only some patterns of urls? For example, I want my app open only if the url contains "london" keyword in it. How can I implement this? Something like this:
<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="www.mysite.com" android:pathPrefix="/*/london/*" android:scheme="https" />

android magnet link data filter

I want to launch an Android activity from my app when the user selects a magnet link in the browser.
According to the docs, A URI is specified by separate attributes for each of its parts:
scheme://host:port/path or pathPrefix or pathPattern
The problem with magnet links is that they have a different pattern, like magnet:?xt=......
I tried something like this
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:scheme="magnet"
android:host="*"
/>
</intent-filter>
but it did not work (the activity didn't launch when I opened a magnet link in my browser). Could you help me in correctly declaring an intent filter for magnet links?

I got this to work for me:
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:scheme="magnet"
/>
</intent-filter>
Basically, I removed android:host

Cannot download unknown extensions

I cannot download (from web & from e-mail) unkwown extentions such as (*.ini, *.zip, *.ddd)
unless there exists an app that can understand the extention.
For example, I couldn't download *.ini file from the browser (or email) until I downloaded 'Astro' app.
How can you by pass so that they are downloadable?
How can you register your app to understan certain extention so that it can be downloadable?

How can you by pass so that they are downloadable?
You don't.
How can you register your app to understan certain extention so that it can be downloadable?
Ideally, you don't. You do it by MIME type. File extensions are very fragile. However, either can be achieved via the use of the <data> element in your activity's <intent-filter>. You will also want the BROWSEABLE category and probably the VIEW action.
For example, here is how you would arrange to be an option for viewing PDF files:
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:mimeType="application/pdf" />
</intent-filter>

<activity
android:name=".Main"
android:label="#string/app_name">
<intent-filter>
<action
android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
<category
android:name="android.intent.category.DEFAULT" />
<category
android:name="android.intent.category.BROWSABLE" />
<data
android:scheme="file" />
<data
android:pathPattern=".*\\.ini" />
<data
android:host="*" />
</intent-filter>
</activity>
Above code allowed me to download *.ini files.
Thank you for your help.