Example: Suppose you have set some text in textview and you want to provide a link on a particular text expression:
"Click on #facebook will take you to facebook.com"
In layout xml: 
<TextView
            android:id="@+id/testtext"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
In Activity:
String text  =  "Click on #facebook will take you to facebook.com";
tv.setText(text);
Pattern tagMatcher = Pattern.compile("[#]+[A-Za-z0-9-_]+\\b");
String newActivityURL = "content://ankit.testactivity/";
Linkify.addLinks(tv, tagMatcher, newActivityURL);
Also create one tag provider as:
public class TagProvider extends ContentProvider {
    @Override
    public int delete(Uri arg0, String arg1, String[] arg2) {
        // TODO Auto-generated method stub
        return 0;
    }
    @Override
    public String getType(Uri arg0) {
        return "vnd.android.cursor.item/vnd.cc.tag";
    }
    @Override
    public Uri insert(Uri arg0, ContentValues arg1) {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public boolean onCreate() {
        // TODO Auto-generated method stub
        return false;
    }
    @Override
    public Cursor query(Uri arg0, String[] arg1, String arg2, String[] arg3,
                        String arg4) {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public int update(Uri arg0, ContentValues arg1, String arg2, String[] arg3) {
        // TODO Auto-generated method stub
        return 0;
    }
}
In manifest file make as entry for provider and test activity as:
<provider
    android:name="ankit.TagProvider"
    android:authorities="ankit.testactivity" />
<activity android:name=".TestActivity"
    android:label = "@string/app_name">
    <intent-filter >
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <data android:mimeType="vnd.android.cursor.item/vnd.cc.tag" />
    </intent-filter>
</activity>
Now when you click on #facebook, it will invoke testactivtiy. And in test activity you can get the data as:
Uri uri = getIntent().getData();