How to get the parameters when launch my app with url?

I add a filter in Manifest to enable browser to launch my app, like this

            <category android:name="android.intent.category.DEFAULT" />
            <category android:name="android.intent.category.BROWSABLE" />

            <data
                android:host="test"
                android:scheme="myapp" />
        </intent-filter>

But I got the re-direction address with params:"myapp://test?param1=123&param2=456"

How can I open my app and get these parameters?