How to open a fragment through android deep link from mail?

Question

I need to open a specific fragment in my application, on click of a confirmation link in the email app. Is it possible and if it is, could I receive information from this link?

Answer 1

First off all you need to add these codes in your manifest to <activity/>(For more information):

<activity
        android:name=".MainActivity"
        android:exported="true"
        android:launchMode="singleTask">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

        <intent-filter android:autoVerify="true">
            <action android:name="android.intent.action.VIEW" />

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

            <data
                android:host="@string/APP_LINKS_URL"
                android:scheme="http" />
        </intent-filter>

        <intent-filter android:autoVerify="true">
            <action android:name="android.intent.action.VIEW" />

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

            <data
                android:host="@string/APP_LINKS_URL"
                android:scheme="https" />
        </intent-filter>
    </activity>

@string/APP_LINKS_URL is url address like some.address.com (For more info)

After that, by clicking a link your activity starts with this link (like Uri: intent.data) in intent object. Based on this link you can open or navigate to the any fragment in your app. For navigating between screen you can use Navigation component navigation-deep-link.

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    _binding = ActivityMainBinding.inflate(layoutInflater)
    setContentView(binding.root)
    //...
    if (intent.data?.toString()?.contains(getString(R.string.APP_LINKS_URL)) == true) {
        //your logic to navigate to specify fragment
    }
}

And you can get informations from this link (Uri): intent.data