Develop Reference

share link from a link of a web page [duplicate]

Is it possible to make a link such as:
click me!
cause my Anton app to start up?
I know that this works for the Android Market app with the market protocol, but can something similar be done with other apps?
Here is an example of a link that will start up the Android Market:
click me!
Update:
The answer I accepted provided by eldarerathis works great, but I just want to mention that I had some trouble with the order of the subelements of the <intent-filter> tag. I suggest you simply make another <intent-filter> with the new subelements in that tag to avoid the problems I had. For instance my AndroidManifest.xml looks like this:
<activity android:name=".AntonWorld"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<data android:scheme="anton" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>

Please DO NOT use your own custom scheme like that!!! URI schemes are a network global namespace. Do you own the "anton:" scheme world-wide? No? Then DON'T use it.
One option is to have a web site, and have an intent-filter for a particular URI on that web site. For example, this is what Market does to intercept URIs on its web site:
<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" android:host="market.android.com"
android:path="/search" />
</intent-filter>
Alternatively, there is the "intent:" scheme. This allows you to describe nearly any Intent as a URI, which the browser will try to launch when clicked. To build such a scheme, the best way is to just write the code to construct the Intent you want launched, and then print the result of intent.toUri(Intent.URI_INTENT_SCHEME).
You can use an action with this intent for to find any activity supporting that action. The browser will automatically add the BROWSABLE category to the intent before launching it, for security reasons; it also will strip any explicit component you have supplied for the same reason.
The best way to use this, if you want to ensure it launches only your app, is with your own scoped action and using Intent.setPackage() to say the Intent will only match your app package.
Trade-offs between the two:
http URIs require you have a domain you own. The user will always get the option to show the URI in the browser. It has very nice fall-back properties where if your app is not installed, they will simply land on your web site.
intent URIs require that your app already be installed and only on Android phones. The allow nearly any intent (but always have the BROWSABLE category included and not supporting explicit components). They allow you to direct the launch to only your app without the user having the option of instead going to the browser or any other app.

I think you'll want to look at the <intent-filter> element of your Manifest file. Specifically, take a look at the documentation for the <data> sub-element.
Basically, what you'll need to do is define your own scheme. Something along the lines of:
<intent-filter>
<data android:scheme="anton" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" /> <--Not positive if this one is needed
...
</intent-filter>
Then you should be able to launch your app with links that begin with the anton: URI scheme.

I have a jQuery plugin to launch native apps from web links: https://github.com/eusonlito/jquery.applink
You can use it easily:
<script>
$('a[data-applink]').applink();
</script>
My Facebook Profile

I also faced this issue and see many absurd pages. I've learned that to make your app browsable, change the order of the XML elements, this this:
<activity
android:name="com.example.MianActivityName"
android:label="#string/title_activity_launcher">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<data android:scheme="http" />
<!-- or you can use deep linking like -->
<data android:scheme="http" android:host="xyz.abc.com"/>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.BROWSABLE"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
This worked for me and might help you.

Here's my recipe:
Create a static HTML that redirects to your requested app URL, put that page on the web.
That way, the links you share are 'real' links as far as Android is concerned ( they will be 'clickable').
You 'share' a regular HTTP link, www.your.server.com/foo/bar.html
This URL returns a simple 8 line HTML that redirects to your app's URI (window.location = "blah://kuku") (note that 'blah' doesn't have to be HTTP or HTTPS any more).
Once you get this up and running, you can augment the HTML with all the fancy capabilities as suggested above.
This works with the built-in browser, Opera, and Firefox (haven't tested any other browser). Firefox asks 'This link needs to be opened with an application' (ok, cancel). Other browsers apparently don't worry about security that much, they just open the app, no questions asked.

This method doesn't call the disambiguation dialog asking you to open either your app or a browser.
If you register the following in your Manifest
<manifest package="com.myApp" .. >
<application ...>
<activity ...>
<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:host="gallery"
android:scheme="myApp" />
</intent-filter>
</activity>
..
and click this url from an email on your phone for example
<a href="intent://gallery?directLink=true#Intent;scheme=myApp;package=com.myApp;end">
Click me
</a>
then android will try to find an app with the package com.myApp that responds to your gallery intent and has a myApp scheme. In case it can't, it will take you to the store, looking for com.myApp, which should be your app.

Once you have the intent and custom url scheme for your app set up, this javascript code at the top of a receiving page has worked for me on both iOS and Android:
<script type="text/javascript">
// if iPod / iPhone, display install app prompt
if (navigator.userAgent.match(/(iPhone|iPod|iPad);?/i) ||
navigator.userAgent.match(/android/i)) {
var store_loc = "itms://itunes.com/apps/raditaz";
var href = "/iphone/";
var is_android = false;
if (navigator.userAgent.match(/android/i)) {
store_loc = "https://play.google.com/store/apps/details?id=com.raditaz";
href = "/android/";
is_android = true;
}
if (location.hash) {
var app_loc = "raditaz://" + location.hash.substring(2);
if (is_android) {
var w = null;
try {
w = window.open(app_loc, '_blank');
} catch (e) {
// no exception
}
if (w) { window.close(); }
else { window.location = store_loc; }
} else {
var loadDateTime = new Date();
window.setTimeout(function() {
var timeOutDateTime = new Date();
if (timeOutDateTime - loadDateTime < 5000) {
window.location = store_loc;
} else { window.close(); }
},
25);
window.location = app_loc;
}
} else {
location.href = href;
}
}
</script>
This has only been tested on the Android browser. I am not sure about Firefox or Opera. The key is even though the Android browser will not throw a nice exception for you on window.open(custom_url, '_blank'), it will fail and return null which you can test later.
Update: using store_loc = "https://play.google.com/store/apps/details?id=com.raditaz"; to link to Google Play on Android.

You may want to consider a library to handle the deep link to your app:
https://github.com/airbnb/DeepLinkDispatch
You can add the intent filter on an annotated Activity like people suggested above. It will handle the routing and parsing of parameters for all of your deep links. For example, your MainActivity might have something like this:
#DeepLink("somePath/{useful_info_for_anton_app}")
public class MainActivity extends Activity {
...
}
It can also handle query parameters as well.

Try my simple trick:
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.startsWith("classRegister:")) {
Intent MnRegister = new Intent(getApplicationContext(), register.class); startActivity(MnRegister);
}
view.loadUrl(url);
return true;
}
and my html link:
Go to register.java
or you can make < a href="classRegister:true" > <- "true" value for class filename
however this script work for mailto link :)
if (url.startsWith("mailto:")) {
String[] blah_email = url.split(":");
Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
emailIntent.setType("text/plain");
emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{blah_email[1]});
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, what_ever_you_want_the_subject_to_be)");
Log.v("NOTICE", "Sending Email to: " + blah_email[1] + " with subject: " + what_ever_you_want_the_subject_to_be);
startActivity(emailIntent);
}

Just want to open the app through browser? You can achieve it using below code:
HTML:
Click here
Manifest:
<intent-filter>
<action android:name="packageName" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
</intent-filter>
This intent filter should be in Launcher Activity.
If you want to pass the data on click of browser link, just refer this link.

Firebase Deep-link opening play store even when the app is installed

I'm developing an android app.
Upon clicking a button, a deep-link is generated and shared with friends.
The problem is that upon clicking that shared deep-link, play store is getting opened even when the app is installed.
I followed this documentation.
Here's the intent-filter:
<!-- [START link_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:host="example.com" android:scheme="http"/>
<data android:host="example.com" android:scheme="https"/>
</intent-filter>
<!-- [END link_intent_filter] -->
Here's how I'm creating the url (manually):
Uri BASE_URI = Uri.parse("https://domainname.com/");
packageName = getBaseContext().getPackageName();
APP_URI = BASE_URI.buildUpon().path(requestID.getText().toString().trim())
.appendQueryParameter("query1", query1.getText().toString())
.appendQueryParameter("query2", query2.getText().toString())
.appendQueryParameter("query3", query3.getText().toString()).build();
try {
String encodedUri = URLEncoder.encode(APP_URI.toString(), "UTF-8");
deepLink = Uri.parse("https://myappcode.app.goo.gl/?link="+encodedUri+"&apn="+holder.packageName+"&amv="+16+"&ad="+0);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Here's the received deep-link/url: http://domainname.com/-KcldzAeJHrPS5tnfxTk?query1=query1&query2=query2&query3=query3
What could be wrong here?

There are at least three things that could possibly be wrong:
The way you are opening the url:
I saw similar problem when writing the url to browser window on Android device. When adding the link to an email and clicking it, the app was opened. You write "click" so perhaps this is not the problem.
Your url and your app/manifest do not match:
You have not added proper intent handler for the protocol or the host to correct place in your manifest or your url does not match with what you have added. Or apn given in the url does not match your apps package name. Based on the question in the current state the host does not match.
You are not sharing the deeplink url, but just an ordinary url:
If you expect the shared url to open preinstalled app, your friends will need to click (on an email or similar) the complete deeplink url, which then either directs the link to play store (if app is not installed) or opens the app (if correctly implemented). Normal url is just opened in the browser. Based on the current state of the question, this could be the case.
If fixing the above does not work:
Try adding specific Android link to your url, something like this:
https://<myappcode>.app.goo.gl/?link=http://domainname.com&apn=com.doman.app&amv=16&ad=0&al=myscheme://any-string-you-choose
after which your intent filter should be something like this:
<!-- [START link_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:host="any-string-you-choose" android:scheme="myscheme"/>
</intent-filter>
<!-- [END link_intent_filter] -->
I prefer this way since it is a bit more flexible compared to using only link. Naturally the package name and other things need to be correct also when using this method. Android link is url to be opened only in android app, a bit poorly documented, check it from here (the example). Also my reply to another question gives some examples on how to use it.
(edit 19.3.2018) It seems that Firebase does not fully support 'al=' anymore. The code works, but it is missing from the documentation and Firebase console generated urls.

Launch android app when a link is tapped on SMS

I don't know if many people have tried this but I am trying a build an app that requires user to tap on a link on the sms he/she receives and this will launch the android app. Is it possible to do in android? If yes, how can I do this? I know this can be done in IOS. Any suggestions or help will be appreciated. Thank You.

In you Manifest, under an Activity that you want to handle incoming data from a link clicked in the messaging app, define something like this:
<activity android:name=".SomeActivityName" >
<intent-filter>
<category android:name="android.intent.category.DEFAULT" />
<action android:name="android.intent.action.VIEW" />
<data android:scheme="com.your_package.something" />
</intent-filter>
</activity>
The android:scheme="" here is what will ensure that the Activity will react to any data with this in it:
<data android:scheme="com.your_package.something" />
In the SomeActivityName (Name used as an illustration. Naturally, you will use your own :-)), you can run a check like this:
Uri data = getIntent().getData();
String strData = data.toString();
if (strScreenName.equals("com.your_package.something://")) {
// THIS IS OPTIONAL IN CASE YOU NEED TO VERIFY. THE ACTUAL USAGE IN MY APP IS BELOW THIS BLOCK
}
My app's similar usage:
Uri data = getIntent().getData();
strScreenName = data.toString()
.replaceAll("com.some_thing.profile://", "")
.replaceAll("#", "");
I use this to handle clicks on twitter #username links within my app. I need to strip out the com.some_thing.profile:// and the # to get the username for further processing. The Manifest code, is the exact same (with just the name and scheme changed).

Add an intent-filter to your app that listens for links that follow the format you want your app to be launched on.
However, this will be a global listener, and any link that fits the format even outside the SMS app will trigger your app. So if the user taps a similar link in the web browser, your app will attempt to respond to it.
Additionally, if there is another app besides yours that can handle this link, Android will create a chooser that allows the user to pick whichever app they want to use. There is nothing you can do about this, except suggest that the user make your app the default handler for such links.

<intent-filter>
<category android:name="android.intent.category.DEFAULT" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE"
<data android:scheme="https" android:host="${hostName}" android:pathPattern="/.*" />
</intent-filter>
Previous answers are OK but don't forget to specify the pattern.
See more details here.
Also define your hostname inside Gradle file like:
android {
defaultConfig {
manifestPlaceholders = [hostName:"subdomain.example.com"]
}
}
More info about manifestPlaceholders here.

Android Intent launch from browser

This topic has been covered before, but I can't find an answer specific to what I'm asking.
Where I am: I followed hackmod's first piece of advice here: Make a link in the Android browser start up my app? and got this to work with a link in the webpage.
However, I'm having trouble understanding the second option (intent uri's). here's what I've got:
<activity android:name="com.myapps.tests.Layout2"
android:label="Auth Complete"
>
<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" android:host="mydomain.com"
android:path="/launch" />
</intent-filter>
</activity>
Now, with that I can go to "mydomain.com/launch" and it launches my activity. this all works well, except that I get the chooser. what I want is for it to just launch my activity without giving options.
From the explanation in the post I referenced it looks like thats what intent uris are for,but I can't find a straightforward example. what should my link in my webpage look like in order to launch this with no chooser?
I've seen a couple of examples that look something like this:
<a href="intent:#Intent;action=com.myapp.android.MY_ACTION;end">
However, that doesn't seem to work when I try it.
My test device is a Galaxy Tab 2.
any help would be appreciated.

I was also trying to launch the app in the recomended way. The following code worked for me.
Code inside the <activity> block of YourActivity in AndroidManifest.xml :
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="your.activity.namespace.CUSTOMACTION" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
</intent-filter>
Code in the activities onCreate() method :
Intent intent = getIntent();
if(intent != null && intent.getAction() == "your.activity.namespace.CUSTOMACTION") {
extraValue = intent.getStringExtra("extraValueName");
Log.e("AwseomeApp", "Extra value Recieved from intent : " + extraValue);
}
For the code in HTML, write an intent for launching the specific Activity, with the action your.activity.namespace.CUSTOMACTION, and your application package name your.activity.namespace. Your can also put some extra in the intent. For example intent.putExtra("extraValueName", "WOW"). Then get the required URL by printing the value of intent.toUri(Intent.URI_INTENT_SCHEME) in the Log. It should look like :
intent:#Intent;action=your.example.namespace.CUSTOMACTION;package=your.example.namespace;component=your.example.namespace/.activity.YourActivity;S.extraValueName=WOW;end
So your HTML code should look like :
<a href="intent:#Intent;action=your.example.namespace.CUSTOMACTION;package=your.example.namespace;component=your.example.namespace/.activity.YourActivity;S.extraValueName=WOW;end">
Launch App
</a>
This is as per what #hackbod suggested in here and this page from developers.google.com.

Depending on your intent filter this link should work:
start my app
But you should note that the android system will ask the user if your app or any other browser should be started.
If you want to avoid this implement a custom protcol handler. So just your app will listen for that and the user won't get the intent chooser.
Try to add this data intent:
<data android:scheme="mycoolapp" android:host="launch" />
With the code above this link should work:
start my app

I needed a small change to abhishek89m'a answer to make this work.
<a href="intent:#Intent;action=your.example.namespace.CUSTOMACTION;package=your.example.namespace;component=your.example.namespace/.YourActivity;S.extraValueName=WOW;end">
Launch App
</a>
I removed ".activity" after the slash in component name.
And I want to add, that custom action is probably the best answer to this problem if you don't want the app chooser to show up.
p.s. I would add this as comment, but I'm a new user and I don't have enough reputation points.

<a href="your.app.scheme://other/parameters/here">
This link on your browser will launch the app with the specific schema
like that on your intent
<intent-filter>
<data android:scheme="your.app.scheme" />
<action android:name="android.intent.action.VIEW" />
</intent-filter>

Make a link in the Android browser start up my app?

Is it possible to make a link such as:
click me!
cause my Anton app to start up?
I know that this works for the Android Market app with the market protocol, but can something similar be done with other apps?
Here is an example of a link that will start up the Android Market:
click me!
Update:
The answer I accepted provided by eldarerathis works great, but I just want to mention that I had some trouble with the order of the subelements of the <intent-filter> tag. I suggest you simply make another <intent-filter> with the new subelements in that tag to avoid the problems I had. For instance my AndroidManifest.xml looks like this:
<activity android:name=".AntonWorld"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<data android:scheme="anton" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.BROWSABLE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>

Please DO NOT use your own custom scheme like that!!! URI schemes are a network global namespace. Do you own the "anton:" scheme world-wide? No? Then DON'T use it.
One option is to have a web site, and have an intent-filter for a particular URI on that web site. For example, this is what Market does to intercept URIs on its web site:
<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" android:host="market.android.com"
android:path="/search" />
</intent-filter>
Alternatively, there is the "intent:" scheme. This allows you to describe nearly any Intent as a URI, which the browser will try to launch when clicked. To build such a scheme, the best way is to just write the code to construct the Intent you want launched, and then print the result of intent.toUri(Intent.URI_INTENT_SCHEME).
You can use an action with this intent for to find any activity supporting that action. The browser will automatically add the BROWSABLE category to the intent before launching it, for security reasons; it also will strip any explicit component you have supplied for the same reason.
The best way to use this, if you want to ensure it launches only your app, is with your own scoped action and using Intent.setPackage() to say the Intent will only match your app package.
Trade-offs between the two:
http URIs require you have a domain you own. The user will always get the option to show the URI in the browser. It has very nice fall-back properties where if your app is not installed, they will simply land on your web site.
intent URIs require that your app already be installed and only on Android phones. The allow nearly any intent (but always have the BROWSABLE category included and not supporting explicit components). They allow you to direct the launch to only your app without the user having the option of instead going to the browser or any other app.

I think you'll want to look at the <intent-filter> element of your Manifest file. Specifically, take a look at the documentation for the <data> sub-element.
Basically, what you'll need to do is define your own scheme. Something along the lines of:
<intent-filter>
<data android:scheme="anton" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" /> <--Not positive if this one is needed
...
</intent-filter>
Then you should be able to launch your app with links that begin with the anton: URI scheme.

I have a jQuery plugin to launch native apps from web links: https://github.com/eusonlito/jquery.applink
You can use it easily:
<script>
$('a[data-applink]').applink();
</script>
My Facebook Profile

I also faced this issue and see many absurd pages. I've learned that to make your app browsable, change the order of the XML elements, this this:
<activity
android:name="com.example.MianActivityName"
android:label="#string/title_activity_launcher">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<data android:scheme="http" />
<!-- or you can use deep linking like -->
<data android:scheme="http" android:host="xyz.abc.com"/>
<action android:name="android.intent.action.VIEW"/>
<category android:name="android.intent.category.BROWSABLE"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
This worked for me and might help you.

Here's my recipe:
Create a static HTML that redirects to your requested app URL, put that page on the web.
That way, the links you share are 'real' links as far as Android is concerned ( they will be 'clickable').
You 'share' a regular HTTP link, www.your.server.com/foo/bar.html
This URL returns a simple 8 line HTML that redirects to your app's URI (window.location = "blah://kuku") (note that 'blah' doesn't have to be HTTP or HTTPS any more).
Once you get this up and running, you can augment the HTML with all the fancy capabilities as suggested above.
This works with the built-in browser, Opera, and Firefox (haven't tested any other browser). Firefox asks 'This link needs to be opened with an application' (ok, cancel). Other browsers apparently don't worry about security that much, they just open the app, no questions asked.

This method doesn't call the disambiguation dialog asking you to open either your app or a browser.
If you register the following in your Manifest
<manifest package="com.myApp" .. >
<application ...>
<activity ...>
<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:host="gallery"
android:scheme="myApp" />
</intent-filter>
</activity>
..
and click this url from an email on your phone for example
<a href="intent://gallery?directLink=true#Intent;scheme=myApp;package=com.myApp;end">
Click me
</a>
then android will try to find an app with the package com.myApp that responds to your gallery intent and has a myApp scheme. In case it can't, it will take you to the store, looking for com.myApp, which should be your app.

Once you have the intent and custom url scheme for your app set up, this javascript code at the top of a receiving page has worked for me on both iOS and Android:
<script type="text/javascript">
// if iPod / iPhone, display install app prompt
if (navigator.userAgent.match(/(iPhone|iPod|iPad);?/i) ||
navigator.userAgent.match(/android/i)) {
var store_loc = "itms://itunes.com/apps/raditaz";
var href = "/iphone/";
var is_android = false;
if (navigator.userAgent.match(/android/i)) {
store_loc = "https://play.google.com/store/apps/details?id=com.raditaz";
href = "/android/";
is_android = true;
}
if (location.hash) {
var app_loc = "raditaz://" + location.hash.substring(2);
if (is_android) {
var w = null;
try {
w = window.open(app_loc, '_blank');
} catch (e) {
// no exception
}
if (w) { window.close(); }
else { window.location = store_loc; }
} else {
var loadDateTime = new Date();
window.setTimeout(function() {
var timeOutDateTime = new Date();
if (timeOutDateTime - loadDateTime < 5000) {
window.location = store_loc;
} else { window.close(); }
},
25);
window.location = app_loc;
}
} else {
location.href = href;
}
}
</script>
This has only been tested on the Android browser. I am not sure about Firefox or Opera. The key is even though the Android browser will not throw a nice exception for you on window.open(custom_url, '_blank'), it will fail and return null which you can test later.
Update: using store_loc = "https://play.google.com/store/apps/details?id=com.raditaz"; to link to Google Play on Android.

You may want to consider a library to handle the deep link to your app:
https://github.com/airbnb/DeepLinkDispatch
You can add the intent filter on an annotated Activity like people suggested above. It will handle the routing and parsing of parameters for all of your deep links. For example, your MainActivity might have something like this:
#DeepLink("somePath/{useful_info_for_anton_app}")
public class MainActivity extends Activity {
...
}
It can also handle query parameters as well.

Try my simple trick:
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if(url.startsWith("classRegister:")) {
Intent MnRegister = new Intent(getApplicationContext(), register.class); startActivity(MnRegister);
}
view.loadUrl(url);
return true;
}
and my html link:
Go to register.java
or you can make < a href="classRegister:true" > <- "true" value for class filename
however this script work for mailto link :)
if (url.startsWith("mailto:")) {
String[] blah_email = url.split(":");
Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
emailIntent.setType("text/plain");
emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{blah_email[1]});
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, what_ever_you_want_the_subject_to_be)");
Log.v("NOTICE", "Sending Email to: " + blah_email[1] + " with subject: " + what_ever_you_want_the_subject_to_be);
startActivity(emailIntent);
}

Just want to open the app through browser? You can achieve it using below code:
HTML:
Click here
Manifest:
<intent-filter>
<action android:name="packageName" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
</intent-filter>
This intent filter should be in Launcher Activity.
If you want to pass the data on click of browser link, just refer this link.