Launching Android Application from link or email

Instead of using a custom scheme, you can have an <intent-filter> that identifies a URL that you control:

<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="www.this-so-does-not-exist.com"        android:path="/something"        android:scheme="http"/></intent-filter>

Then, links to http://www.this-so-does-not-exist.com/something will bring up your app (in a chooser, along with the Web browse) on devices that have your app, and will bring up your Web page on devices that do not have your app.

Make a real link (http:) that goes a website you control, such as a static website on amazon s3, use the javascript on that site to detect an android user agent and then redirect to a link with the anchor tag.

<activityandroid:name=".SplashEmailActivity"android:screenOrientation="portrait"android:exported="true"android:launchMode="singleInstance" android:configChanges="orientation|keyboard|keyboardHidden|screenSize"android:windowSoftInputMode="stateHidden|adjustResize" ><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="your.domain.name"/></intent-filter></activity>