I have to open my android application, when user clicks on a link that has my domain name. For example, lets say my domain is abc.com and i have posted this link on my Faceb
You have to define a custom Intent Filter in the activity that should be launched when the url is clicked.
Let say that you want to launch the FirstActivity when a user click a http://www.example.com/ link on a web page.
Add this to your activity in the Manifest :
<activity android:name=".FirstActivity"
android:label="FirstActivity">
<intent-filter>
<action android:name="android.intent.action.VIEW"></action>
<category android:name="android.intent.category.DEFAULT"></category>
<category android:name="android.intent.category.BROWSABLE"></category>
<data android:host="www.example.com" android:scheme="http"></data>
</intent-filter>
</activity>
When the user will click a HTML link to http://www.example.com/, the system will prompt either to use the browser or your app.
You can achieve this by using URI schemes (link e.g. myscheme://open/chat), add into your manifest this filter into e.g. main activity section (set your scheme name):
<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="YOUR_SCHEME_NAME" />
</intent-filter>
In your activity where you've set filter, you can get URI by calling this (in onCreate):
Uri intentUri = getIntent().getData();