Precise Intent Resolution -Android 15

Blog Infos

Author

Nav Singh

Published

7. August 2024

Topics

android, Android 15, AndroidDev, Deep Link Android, Jetpack Compose

Author

Nav Singh

Published

7. August 2024

Topics

android, Android 15, AndroidDev, Deep Link Android, Jetpack Compose

In this article, we will discuss some new improvements to the intent filter in Android 15

Major components

A UriRelativeFilterGroup contains a set of UriRelativeFilter objects that form a set of Intent matching rules that must be satisfied — [URL fragments, query params, etc.]

We can define these new rules in AndroidManifest file with the new <uri-relative-filter-group> tag

With this tag, we can use data tags with existing attributes as well as the new [android:fragment, android:query, android:allow]

<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:scheme="https" />
    <data android:host="developer.android.com" />

    <uri-relative-filter-group android:allow="true">
        <data android:pathPrefix="/samples" />
        <data android:query="language=kotlin" />
    </uri-relative-filter-group>

    <uri-relative-filter-group android:allow="false">
        <data android:pathPrefix="/reference" />
        <data android:fragment="jetpack" />
    </uri-relative-filter-group></intent-filter>

Implementation

In the AndroidManifest file, add intent-filter to the Activity tag to handle deep links 🔗

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.Android15Samples"
        tools:targetApi="31">
        
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:theme="@style/Theme.Android15Samples">
            <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:scheme="https" />
                <data android:host="developer.android.com" />

                <uri-relative-filter-group android:allow="true">
                    <data android:pathPrefix="/samples" />
                    <data android:query="language=kotlin" />
                </uri-relative-filter-group>

                <uri-relative-filter-group android:allow="false">
                    <data android:pathPrefix="/reference" />
                    <data android:fragment="jetpack" />
                </uri-relative-filter-group>

<!--                https://developer.android.com/reference#jetpack-->
            </intent-filter>
        </activity>

    </application>

</manifest>

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Activity that shows the Uri from the deep link 🔗 intent

class MainActivity : ComponentActivity() {

    private var uri = mutableStateOf("")

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            Android15SamplesTheme {
                Content(modifier = Modifier.fillMaxSize(), uri = uri)
            }
        }
        handleIntent(intent)
    }

    override fun onNewIntent(intent: Intent) {
        super.onNewIntent(intent)
        handleIntent(intent)

    }

    private fun handleIntent(intent: Intent) {
        val uri = intent.data
        this.uri.value = uri?.toString().orEmpty()
    }
}

@Composable
fun Content(uri: State<String>, modifier: Modifier = Modifier) {
    Scaffold(modifier = modifier) { innerPadding ->
        Column(
            modifier = Modifier
                .fillMaxSize()
                .padding(innerPadding),
            verticalArrangement = Arrangement.Center,
            horizontalAlignment = Alignment.CenterHorizontally
        ) {
            Image(
                painter = painterResource(id = R.drawable.img_android_15_logo),
                modifier = Modifier.size(200.dp),
                contentDescription = "Android15 Logo"
            )
            Spacer(modifier = Modifier.size(32.dp))
            Android15ContentHeader(
                modifier = Modifier.padding(innerPadding)
            )
            if (uri.value.isNotEmpty()) {
                Spacer(modifier = Modifier.size(32.dp))
                UriInfoFromLink(
                    uri = uri.value,
                    modifier = Modifier.padding(innerPadding)
                )
            }
        }
    }
}

@Composable
fun Android15ContentHeader(modifier: Modifier = Modifier) {
    Text(
        text = "Android15 - Samples",
        modifier = modifier,
        style = MaterialTheme.typography.headlineMedium
    )
}

@Composable
fun UriInfoFromLink(uri: String, modifier: Modifier = Modifier) {
    Text(
        text = "Uri from intent: $uri",
        modifier = modifier,
        style = MaterialTheme.typography.labelLarge
    )
}

UI — Composable Preview

Demo

android:query tag and android:allow set to true

<!--  https://developer.android.com/samples?language=kotlin-->

<uri-relative-filter-group android:allow="true">
    <data android:pathPrefix="/samples" />
    <data android:query="language=kotlin" />
</uri-relative-filter-group>

Demo — android:query tag and android:allow set to true

android:fragment tag and android:allow set to false


<!--   https://developer.android.com/reference#jetpack-->

<uri-relative-filter-group android:allow="false">
    <data android:pathPrefix="/reference" />
    <data android:fragment="jetpack" />
</uri-relative-filter-group>