Common intents

val REQUEST_IMAGE_CAPTURE = 1

private fun dispatchTakePictureIntent() {
    val takePictureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
    try {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE)
    } catch (e: ActivityNotFoundException) {
        // Display error state to the user.
    }
}

static final int REQUEST_IMAGE_CAPTURE = 1;

private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    try {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    } catch (ActivityNotFoundException e) {
        // Display error state to the user.
    }
}
</section></div>

For more information about how to use this intent to capture a photo, including how to create an appropriate Uri for the output location, read Take photos or Take videos.

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.media.action.IMAGE_CAPTURE" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

When handling this intent, have your activity check for the EXTRA_OUTPUT extra in the incoming Intent, then save the captured image or video at the location specified by that extra and call setResult() with an Intent that includes a compressed thumbnail in an extra named "data".

Start a camera app in still image mode

Google Voice Actions

• "take a picture"

To open a camera app in still image mode, use the INTENT_ACTION_STILL_IMAGE_CAMERA action.

Action

INTENT_ACTION_STILL_IMAGE_CAMERA

Data URI Scheme

None

MIME Type

None

Extras

None

Example intent:

private fun dispatchTakePictureIntent() {
    val takePictureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
    try {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE)
    } catch (e: ActivityNotFoundException) {
        // Display error state to the user.
    }
}

public void capturePhoto(String targetFilename) {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT,
            Uri.withAppendedPath(locationForPhotos, targetFilename));
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.media.action.STILL_IMAGE_CAMERA" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

Start a camera app in video mode

Google Voice Actions

• "record a video"

To open a camera app in video mode, use the INTENT_ACTION_VIDEO_CAMERA action.

Action

INTENT_ACTION_VIDEO_CAMERA

Data URI Scheme

None

MIME Type

None

Extras

None

Example intent:

fun capturePhoto() {
    val intent = Intent(MediaStore.INTENT_ACTION_VIDEO_CAMERA)
    if (intent.resolveActivity(packageManager) != null) {
        startActivityForResult(intent, REQUEST_IMAGE_CAPTURE)
    }
}

public void capturePhoto() {
    Intent intent = new Intent(MediaStore.INTENT_ACTION_VIDEO_CAMERA);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.media.action.VIDEO_CAMERA" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

Contacts/people app

The following are common actions for contacts management apps, including the information you need to create an intent filter to advertise your app's ability to perform each action.

Select a contact

To have the user select a contact and provide your app access to all the contact information, use the ACTION_PICK action and specify the MIME type to Contacts.CONTENT_TYPE.

The result Intent delivered to your onActivityResult() callback contains the content: URI pointing to the selected contact. The response grants your app temporary permissions to read that contact using the Contacts Provider API, even if your app doesn't include the READ_CONTACTS permission.

Tip: If you need access to only a specific piece of contact information, such as a phone number or email address, instead see the next section about how to select specific contact data.

Action

ACTION_PICK

Data URI Scheme

None

MIME Type

Contacts.CONTENT_TYPE

Example intent:

const val REQUEST_SELECT_CONTACT = 1

fun selectContact() {
    val intent = Intent(Intent.ACTION_PICK).apply {
        type = ContactsContract.Contacts.CONTENT_TYPE
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivityForResult(intent, REQUEST_SELECT_CONTACT)
    }
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    if (requestCode == REQUEST_SELECT_CONTACT && resultCode == RESULT_OK) {
        val contactUri: Uri = data.data
        // Do something with the selected contact at contactUri.
        //...
    }
}

static final int REQUEST_SELECT_CONTACT = 1;

public void selectContact() {
    Intent intent = new Intent(Intent.ACTION_PICK);
    intent.setType(ContactsContract.Contacts.CONTENT_TYPE);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(intent, REQUEST_SELECT_CONTACT);
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_SELECT_CONTACT && resultCode == RESULT_OK) {
        Uri contactUri = data.getData();
        // Do something with the selected contact at contactUri.
        ...
    }
}

For information about how to retrieve contact details once you have the contact URI, read Retrieve details for a contact.

When you retrieve the contact URI using this intent, you generally don't need the READ_CONTACTS permission to read basic details for that contact, such as display name and whether the contact is starred. However, if you're trying to read more specific data about a given contact—such as their phone number or email address—you need the READ_CONTACTS permission.

Select specific contact data

To have the user select a specific piece of information from a contact, such as a phone number, email address, or other data type, use the ACTION_PICK action and specify the MIME type to one of the following content types, such as CommonDataKinds.Phone.CONTENT_TYPE to get the contact's phone number.

Note: In many cases, your app needs to have the READ_CONTACTS permission to view specific information about a particular contact.

If you need to retrieve only one type of data from a contact, this technique with a CONTENT_TYPE from the ContactsContract.CommonDataKinds classes is more efficient than using the Contacts.CONTENT_TYPE, as shown in the preceding section. The result provides you direct access to the desired data without requiring you to perform a more complex query to Contacts Provider.

The result Intent delivered to your onActivityResult() callback contains the content: URI pointing to the selected contact data. The response grants your app temporary permissions to read that contact data even if your app doesn't include the READ_CONTACTS permission.

Action

ACTION_PICK

Data URI Scheme

None

MIME Type

CommonDataKinds.Phone.CONTENT_TYPE

Pick from contacts with a phone number.

CommonDataKinds.Email.CONTENT_TYPE

Pick from contacts with an email address.

CommonDataKinds.StructuredPostal.CONTENT_TYPE

Pick from contacts with a postal address.

Or one of many other CONTENT_TYPE values under ContactsContract.

Example intent:

const val REQUEST_SELECT_PHONE_NUMBER = 1

fun selectContact() {
    // Start an activity for the user to pick a phone number from contacts.
    val intent = Intent(Intent.ACTION_PICK).apply {
        type = CommonDataKinds.Phone.CONTENT_TYPE
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivityForResult(intent, REQUEST_SELECT_PHONE_NUMBER)
    }
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    if (requestCode == REQUEST_SELECT_PHONE_NUMBER && resultCode == Activity.RESULT_OK) {
        // Get the URI and query the content provider for the phone number.
        val contactUri: Uri = data.data
        val projection: Array<String> = arrayOf(CommonDataKinds.Phone.NUMBER)
        contentResolver.query(contactUri, projection, null, null, null).use { cursor ->
            // If the cursor returned is valid, get the phone number.
            if (cursor.moveToFirst()) {
                val numberIndex = cursor.getColumnIndex(CommonDataKinds.Phone.NUMBER)
                val number = cursor.getString(numberIndex)
                // Do something with the phone number.
                ...
            }
        }
    }
}

static final int REQUEST_SELECT_PHONE_NUMBER = 1;

public void selectContact() {
    // Start an activity for the user to pick a phone number from contacts.
    Intent intent = new Intent(Intent.ACTION_PICK);
    intent.setType(CommonDataKinds.Phone.CONTENT_TYPE);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(intent, REQUEST_SELECT_PHONE_NUMBER);
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_SELECT_PHONE_NUMBER && resultCode == RESULT_OK) {
        // Get the URI and query the content provider for the phone number.
        Uri contactUri = data.getData();
        String[] projection = new String[]{CommonDataKinds.Phone.NUMBER};
        Cursor cursor = getContentResolver().query(contactUri, projection,
                null, null, null);
        // If the cursor returned is valid, get the phone number.
        if (cursor != null && cursor.moveToFirst()) {
            int numberIndex = cursor.getColumnIndex(CommonDataKinds.Phone.NUMBER);
            String number = cursor.getString(numberIndex);
            // Do something with the phone number.
            //...
        }
    }
}

View a contact

To display the details for a known contact, use the ACTION_VIEW action and specify the contact with a content: URI as the intent data.

There are two primary ways to initially retrieve the contact's URI:

• Use the contact URI returned by the ACTION_PICK action shown in the preceding section. This approach doesn't require any app permissions.
• Access the list of all contacts directly, as described in Retrieve a list of contacts. This approach requires the READ_CONTACTS permission.

Action

ACTION_VIEW

Data URI Scheme

content:<URI>

MIME Type

None. The type is inferred from the contact URI.

Example intent:

fun viewContact(contactUri: Uri) {
    val intent = Intent(Intent.ACTION_VIEW, contactUri)
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void viewContact(Uri contactUri) {
    Intent intent = new Intent(Intent.ACTION_VIEW, contactUri);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Edit an existing contact

To edit a known contact, use the ACTION_EDIT action, specify the contact with a content: URI as the intent data, and include any known contact information in extras specified by constants in ContactsContract.Intents.Insert.

There are two primary ways to initially retrieve the contact URI:

• Use the contact URI returned by the ACTION_PICK action shown in the preceding section. This approach doesn't require any app permissions.
• Access the list of all contacts directly, as described in Retrieve a list of contacts. This approach requires the READ_CONTACTS permission.

Action

ACTION_EDIT

Data URI Scheme

content:<URI>

MIME Type

The type is inferred from the contact URI.

Extras

One or more of the extras defined in ContactsContract.Intents.Insert so you can populate fields of the contact details.

Example intent:

fun editContact(contactUri: Uri, email: String) {
    val intent = Intent(Intent.ACTION_EDIT).apply {
        data = contactUri
        putExtra(ContactsContract.Intents.Insert.EMAIL, email)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void editContact(Uri contactUri, String email) {
    Intent intent = new Intent(Intent.ACTION_EDIT);
    intent.setData(contactUri);
    intent.putExtra(Intents.Insert.EMAIL, email);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

For more information about how to edit a contact, read Modify contacts using intents.

Insert a contact

To insert a new contact, use the ACTION_INSERT action, specify Contacts.CONTENT_TYPE as the MIME type, and include any known contact information in extras specified by constants in ContactsContract.Intents.Insert.

Action

ACTION_INSERT

Data URI Scheme

None

MIME Type

Contacts.CONTENT_TYPE

Extras

One or more of the extras defined in ContactsContract.Intents.Insert.

Example intent:

fun insertContact(name: String, email: String) {
    val intent = Intent(Intent.ACTION_INSERT).apply {
        type = ContactsContract.Contacts.CONTENT_TYPE
        putExtra(ContactsContract.Intents.Insert.NAME, name)
        putExtra(ContactsContract.Intents.Insert.EMAIL, email)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void insertContact(String name, String email) {
    Intent intent = new Intent(Intent.ACTION_INSERT);
    intent.setType(Contacts.CONTENT_TYPE);
    intent.putExtra(Intents.Insert.NAME, name);
    intent.putExtra(Intents.Insert.EMAIL, email);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

For more information about how to insert a contact, read Modify contacts using intents.

Email

Composing an email with optional attachments is a common action for email apps. Create an intent filter to advertise your app's ability to perform this action using the information in the following section.

Compose an email with optional attachments

To compose an email, use one of the following actions based on whether you'll include attachments or not, and include email details such as the recipient and subject using the extra keys listed.

Action

ACTION_SENDTO (for no attachment) or
ACTION_SEND (for one attachment) or
ACTION_SEND_MULTIPLE (for multiple attachments)

Data URI Scheme

None

MIME Type

"text/plain"

"*/*"

Extras

Intent.EXTRA_EMAIL

A string array of all "To" recipient email addresses.

Intent.EXTRA_CC

A string array of all "CC" recipient email addresses.

Intent.EXTRA_BCC

A string array of all "BCC" recipient email addresses.

Intent.EXTRA_SUBJECT

A string with the email subject.

Intent.EXTRA_TEXT

A string with the body of the email.

Intent.EXTRA_STREAM

A Uri pointing to the attachment. If using the ACTION_SEND_MULTIPLE action, this instead is an ArrayList containing multiple Uri objects.

Example intent:

fun composeEmail(addresses: Array<String>, subject: String, attachment: Uri) {
    val intent = Intent(Intent.ACTION_SEND).apply {
        type = "*/*"
        putExtra(Intent.EXTRA_EMAIL, addresses)
        putExtra(Intent.EXTRA_SUBJECT, subject)
        putExtra(Intent.EXTRA_STREAM, attachment)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void composeEmail(String[] addresses, String subject, Uri attachment) {
    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setType("*/*");
    intent.putExtra(Intent.EXTRA_EMAIL, addresses);
    intent.putExtra(Intent.EXTRA_SUBJECT, subject);
    intent.putExtra(Intent.EXTRA_STREAM, attachment);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

If you want to make sure that your intent is handled only by an email app, and not a text messaging or social app, then use the ACTION_SENDTO action and include the "mailto:" data scheme as shown in the following example:

fun composeEmail(addresses: Array<String>, subject: String) {
    val intent = Intent(Intent.ACTION_SENDTO).apply {
        data = Uri.parse("mailto:") // Only email apps handle this.
        putExtra(Intent.EXTRA_EMAIL, addresses)
        putExtra(Intent.EXTRA_SUBJECT, subject)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void composeEmail(String[] addresses, String subject) {
    Intent intent = new Intent(Intent.ACTION_SENDTO);
    intent.setData(Uri.parse("mailto:")); // Only email apps handle this.
    intent.putExtra(Intent.EXTRA_EMAIL, addresses);
    intent.putExtra(Intent.EXTRA_SUBJECT, subject);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.intent.action.SEND" />
        <data android:type="*/*" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
    <intent-filter>
        <action android:name="android.intent.action.SENDTO" />
        <data android:scheme="mailto" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

File storage

The following are common actions for file storage apps, including the information you need to create an intent filter to advertise your app's ability to perform each action.

Retrieve a specific type of file

To request that the user select a file such as a document or photo and return a reference to your app, use the ACTION_GET_CONTENT action and specify your desired MIME type. The file reference returned to your app is transient to your activity's current lifecycle, so if you want to access it later you must import a copy that you can read later.

This intent also lets the user create a new file in the process. For example, instead of selecting an existing photo, the user can capture a new photo with the camera.

The result intent delivered to your onActivityResult() method includes data with a URI pointing to the file. The URI can be anything, such as an http: URI, file: URI, or content: URI. However, if you'd like to restrict selectable files to only those that are accessible from a content provider (a content: URI) and that are available as a file stream with openFileDescriptor(), add the CATEGORY_OPENABLE category to your intent.

On Android 4.3 (API level 18) and higher, you can also let the user select multiple files by adding EXTRA_ALLOW_MULTIPLE to the intent, set to true. You can then access each of the selected files in a ClipData object returned by getClipData().

Action

ACTION_GET_CONTENT

Data URI Scheme

None

MIME Type

The MIME type corresponding to the file type the user needs to select.

Extras

EXTRA_ALLOW_MULTIPLE

A boolean that declares whether the user can select more than one file at a time.

EXTRA_LOCAL_ONLY

A boolean that declares whether the returned file must be available directly from the device, rather than requiring a download from a remote service.

Category (optional)

CATEGORY_OPENABLE

To return only "openable" files that can be represented as a file stream with openFileDescriptor().

Example intent to get a photo:

const val REQUEST_IMAGE_GET = 1

fun selectImage() {
    val intent = Intent(Intent.ACTION_GET_CONTENT).apply {
        type = "image/*"
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivityForResult(intent, REQUEST_IMAGE_GET)
    }
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    if (requestCode == REQUEST_IMAGE_GET && resultCode == Activity.RESULT_OK) {
        val thumbnail: Bitmap = data.getParcelableExtra("data")
        val fullPhotoUri: Uri = data.data
        // Do work with photo saved at fullPhotoUri.
        ...
    }
}

static final int REQUEST_IMAGE_GET = 1;

public void selectImage() {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("image/*");
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(intent, REQUEST_IMAGE_GET);
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_GET && resultCode == RESULT_OK) {
        Bitmap thumbnail = data.getParcelable("data");
        Uri fullPhotoUri = data.getData();
        // Do work with photo saved at fullPhotoUri.
        ...
    }
}

Example intent filter to return a photo:

<activity ...>
    <intent-filter>
        <action android:name="android.intent.action.GET_CONTENT" />
        <data android:type="image/*" />
        <category android:name="android.intent.category.DEFAULT" />
        <!-- The OPENABLE category declares that the returned file is accessible
             from a content provider that supports OpenableColumns
             and ContentResolver.openFileDescriptor(). -->
        <category android:name="android.intent.category.OPENABLE" />
    </intent-filter>
</activity>

Open a specific type of file

Instead of retrieving a copy of a file that you must import to your app, by using the ACTION_GET_CONTENT action, when running on Android 4.4 or higher you can instead request to open a file that's managed by another app by using the ACTION_OPEN_DOCUMENT action and specifying a MIME type. To also let the user create a new document that your app can write to, use the ACTION_CREATE_DOCUMENT action instead.

For example, instead of selecting from existing PDF documents, the ACTION_CREATE_DOCUMENT intent lets users select where they'd like to create a new document, such as within another app that manages the document's storage. Your app then receives the URI location of where it can write the new document.

Whereas the intent delivered to your onActivityResult() method from the ACTION_GET_CONTENT action might return a URI of any type, the result intent from ACTION_OPEN_DOCUMENT and ACTION_CREATE_DOCUMENT always specify the chosen file as a content: URI that's backed by a DocumentsProvider. You can open the file with openFileDescriptor() and query its details using columns from DocumentsContract.Document.

The returned URI grants your app long-term read access to the file, also possibly with write access. The ACTION_OPEN_DOCUMENT action is particularly useful when you want to read an existing file without making a copy into your app or when you want to open and edit a file in place.

You can also let the user select multiple files by adding EXTRA_ALLOW_MULTIPLE to the intent, set to true. If the user selects just one item, then you can retrieve the item from getData(). If the user selects more than one item, then getData() returns null and you must instead retrieve each item from a ClipData object that is returned by getClipData().

Note: Your intent must specify a MIME type and must declare the CATEGORY_OPENABLE category. If appropriate, you can specify more than one MIME type by adding an array of MIME types with the EXTRA_MIME_TYPES extra—if you do so, you must set the primary MIME type in setType() to "*/*".

Action

ACTION_OPEN_DOCUMENT or
ACTION_CREATE_DOCUMENT

Data URI Scheme

None

MIME Type

The MIME type corresponding to the file type the user needs to select.

Extras

EXTRA_MIME_TYPES

An array of MIME types corresponding to the types of files your app is requesting. When you use this extra, you must set the primary MIME type in setType() to "*/*".

EXTRA_ALLOW_MULTIPLE

A boolean that declares whether the user can select more than one file at a time.

EXTRA_TITLE

For use with ACTION_CREATE_DOCUMENT to specify an initial filename.

EXTRA_LOCAL_ONLY

A boolean that declares whether the returned file must be available directly from the device, rather than requiring a download from a remote service.

Category

CATEGORY_OPENABLE

To return only "openable" files that can be represented as a file stream with openFileDescriptor().

Example intent to get a photo:

const val REQUEST_IMAGE_OPEN = 1

fun selectImage2() {
    val intent = Intent(Intent.ACTION_OPEN_DOCUMENT).apply {
        type = "image/*"
        addCategory(Intent.CATEGORY_OPENABLE)
    }
    // Only the system receives the ACTION_OPEN_DOCUMENT, so no need to test.
    startActivityForResult(intent, REQUEST_IMAGE_OPEN)
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    if (requestCode == REQUEST_IMAGE_OPEN && resultCode == Activity.RESULT_OK) {
        val fullPhotoUri: Uri = data.data
        // Do work with full size photo saved at fullPhotoUri.
        ...
    }
}

static final int REQUEST_IMAGE_OPEN = 1;

public void selectImage() {
    Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
    intent.setType("image/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    // Only the system receives the ACTION_OPEN_DOCUMENT, so no need to test.
    startActivityForResult(intent, REQUEST_IMAGE_OPEN);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_OPEN && resultCode == RESULT_OK) {
        Uri fullPhotoUri = data.getData();
        // Do work with full size photo saved at fullPhotoUri.
        ...
    }
}

Third-party apps can't respond to an intent with the ACTION_OPEN_DOCUMENT action. Instead, the system receives this intent and displays all the files available from various apps in a unified user interface.

To provide your app's files in this UI and let other apps open them, you must implement a DocumentsProvider and include an intent filter for PROVIDER_INTERFACE ("android.content.action.DOCUMENTS_PROVIDER"), as shown in the following example:

<provider ...
    android:grantUriPermissions="true"
    android:exported="true"
    android:permission="android.permission.MANAGE_DOCUMENTS">
    <intent-filter>
        <action android:name="android.content.action.DOCUMENTS_PROVIDER" />
    </intent-filter>
</provider>

For more information about how to make the files managed by your app openable from other apps, read Open files using storage access framework.

Local actions

Calling a car is a common local action. Create an intent filter to advertise your app's ability to perform this action using the information in the following section.

Call a car

Google Voice Actions

• "get me a taxi"
• "call me a car"

(Wear OS only)

To call a taxi, use the ACTION_RESERVE_TAXI_RESERVATION action.

Note: Apps must ask for confirmation from the user before completing this action.

Action

ACTION_RESERVE_TAXI_RESERVATION

Data URI

None

MIME Type

None

Extras

None

Example intent:

fun callCar() {
    val intent = Intent(ReserveIntents.ACTION_RESERVE_TAXI_RESERVATION)
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void callCar() {
    Intent intent = new Intent(ReserveIntents.ACTION_RESERVE_TAXI_RESERVATION);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="com.google.android.gms.actions.RESERVE_TAXI_RESERVATION" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

Maps

Showing a location on a map is a common action for map apps. Create an intent filter to advertise your app's ability to perform this action using the information in the following section.

Show a location on a map

To open a map, use the ACTION_VIEW action and specify the location information in the intent data with one of the following schemes.

Action

ACTION_VIEW

Data URI Scheme

geo:latitude,longitude

Show the map at the given longitude and latitude.

Example: "geo:47.6,-122.3"

geo:latitude,longitude?z=zoom

Show the map at the given longitude and latitude at a certain zoom level. A zoom level of 1 shows the whole Earth, centered at the given lat,lng. The highest (closest) zoom level is 23.

Example: "geo:47.6,-122.3?z=11"

geo:0,0?q=lat,lng(label)

Show the map at the given longitude and latitude with a string label.

Example: "geo:0,0?q=34.99,-106.61(Treasure)"

geo:0,0?q=my+street+address

Show the location for "my street address", which can be a specific address or location query.

Example: "geo:0,0?q=1600+Amphitheatre+Parkway%2C+CA"

Note: All strings passed in the geo URI must be encoded. For example, the string 1st & Pike, Seattle becomes 1st%20%26%20Pike%2C%20Seattle. Spaces in the string are encoded with %20 or replaced with the plus sign (+).

MIME Type

None

Example intent:

fun showMap(geoLocation: Uri) {
    val intent = Intent(Intent.ACTION_VIEW).apply {
        data = geoLocation
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void showMap(Uri geoLocation) {
    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setData(geoLocation);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <data android:scheme="geo" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

Music or video

The following are common actions for music and video apps, including the information you need to create an intent filter to advertise your app's ability to perform each action.

Play a media file

To play a music file, use the ACTION_VIEW action and specify the URI location of the file in the intent data.

Action

ACTION_VIEW

Data URI Scheme

file:<URI>

content:<URI>

http:<URL>

MIME Type

"audio/*"

"application/ogg"

"application/x-ogg"

"application/itunes"

Or any other that your app requires.

Example intent:

fun playMedia(file: Uri) {
    val intent = Intent(Intent.ACTION_VIEW).apply {
        data = file
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void playMedia(Uri file) {
    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setData(file);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <data android:type="audio/*" />
        <data android:type="application/ogg" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

Play music based on a search query

Google Voice Actions

• "play michael jackson billie jean"

To play music based on a search query, use the INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH intent. An app might fire this intent in response to the user's voice command to play music. The receiving app for this intent performs a search within its inventory to match existing content to the given query and starts playing that content.

In this intent, include the EXTRA_MEDIA_FOCUS string extra, which specifies the intended search mode. For example, the search mode can specify whether the search is for an artist name or song name.

Action

INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH

Data URI Scheme

None

MIME Type

None

Extras

MediaStore.EXTRA_MEDIA_FOCUS (required)

Indicates the search mode: whether the user is looking for a particular artist, album, song, or playlist. Most search modes take additional extras. For example, if the user is interested in listening to a particular song, the intent might have three additional extras: the song title, the artist, and the album. This intent supports the following search modes for each value of EXTRA_MEDIA_FOCUS:

Any - "vnd.android.cursor.item/*"

Play any music. The receiving app plays some music based on a smart choice, such as the last playlist the user listened to.

Additional extras:

• QUERY (required): an empty string. This extra is always provided for backward compatibility. Existing apps that don't know about search modes can process this intent as an unstructured search.

Unstructured - "vnd.android.cursor.item/*"

Play a particular song, album, or genre from an unstructured search query. Apps can generate an intent with this search mode when they can't identify the type of content the user wants to listen to. Use more specific search modes when possible.

Additional extras:

• QUERY (required): a string that contains any combination of the artist, the album, the song name, or the genre.

Genre - Audio.Genres.ENTRY_CONTENT_TYPE

Play music of a particular genre.

Additional extras:

• "android.intent.extra.genre" (required) - The genre.
• QUERY (required): the genre. This extra is always provided for backward compatibility. Existing apps that don't know about search modes can process this intent as an unstructured search.

Artist - Audio.Artists.ENTRY_CONTENT_TYPE

Play music from a particular artist.

Additional extras:

• EXTRA_MEDIA_ARTIST (required): the artist.
• "android.intent.extra.genre": the genre.
• QUERY (required): a string that contains any combination of the artist or the genre. This extra is always provided for backward compatibility. Existing apps that don't know about search modes can process this intent as an unstructured search.

Album - Audio.Albums.ENTRY_CONTENT_TYPE

Play music from a particular album.

Additional extras:

• EXTRA_MEDIA_ALBUM (required): the album.
• EXTRA_MEDIA_ARTIST: the artist.
• "android.intent.extra.genre": the genre.
• QUERY (required): a string that contains any combination of the album or the artist. This extra is always provided for backward compatibility. Existing apps that don't know about search modes can process this intent as an unstructured search.

Song - "vnd.android.cursor.item/audio"

Play a particular song.

Additional extras:

• EXTRA_MEDIA_ALBUM: the album.
• EXTRA_MEDIA_ARTIST: the artist.
• "android.intent.extra.genre": the genre.
• EXTRA_MEDIA_TITLE (required): the song name.
• QUERY (required): a string that contains any combination of the album, the artist, the genre, or the title. This extra is always provided for backward compatibility. Existing apps that don't know about search modes can process this intent as an unstructured search.

Playlist - Audio.Playlists.ENTRY_CONTENT_TYPE

Play a particular playlist or a playlist that matches some criteria specified by additional extras.

Additional extras:

• EXTRA_MEDIA_ALBUM: the album.
• EXTRA_MEDIA_ARTIST: the artist.
• "android.intent.extra.genre": the genre.
• "android.intent.extra.playlist": the playlist.
• EXTRA_MEDIA_TITLE: the song name that the playlist is based on.
• QUERY (required): a string that contains any combination of the album, the artist, the genre, the playlist, or the title. This extra is always provided for backward compatibility. Existing apps that don't know about search modes can process this intent as an unstructured search.

Example intent:

If the user wants to listen to music from a particular artist, a search app might generate the following intent:

fun playSearchArtist(artist: String) {
    val intent = Intent(MediaStore.INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH).apply {
        putExtra(MediaStore.EXTRA_MEDIA_FOCUS, MediaStore.Audio.Artists.ENTRY_CONTENT_TYPE)
        putExtra(MediaStore.EXTRA_MEDIA_ARTIST, artist)
        putExtra(SearchManager.QUERY, artist)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

public void playSearchArtist(String artist) {
    Intent intent = new Intent(MediaStore.INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH);
    intent.putExtra(MediaStore.EXTRA_MEDIA_FOCUS,
                    MediaStore.Audio.Artists.ENTRY_CONTENT_TYPE);
    intent.putExtra(MediaStore.EXTRA_MEDIA_ARTIST, artist);
    intent.putExtra(SearchManager.QUERY, artist);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.media.action.MEDIA_PLAY_FROM_SEARCH" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

When handling this intent in your activity, check the value of the EXTRA_MEDIA_FOCUS extra in the incoming Intent to determine the search mode. Once your activity has identified the search mode, read the values of the additional extras for that particular search mode. With this information, your app can then perform the search within its inventory to play the content that matches the search query. This is shown in the following example.

override fun onCreate(savedInstanceState: Bundle?) {
    ...
    if (intent.action.compareTo(MediaStore.INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH) == 0) {

        val mediaFocus: String? = intent.getStringExtra(MediaStore.EXTRA_MEDIA_FOCUS)
        val query: String? = intent.getStringExtra(SearchManager.QUERY)

        // Some of these extras might not be available depending on the search mode.
        val album: String? = intent.getStringExtra(MediaStore.EXTRA_MEDIA_ALBUM)
        val artist: String? = intent.getStringExtra(MediaStore.EXTRA_MEDIA_ARTIST)
        val genre: String? = intent.getStringExtra("android.intent.extra.genre")
        val playlist: String? = intent.getStringExtra("android.intent.extra.playlist")
        val title: String? = intent.getStringExtra(MediaStore.EXTRA_MEDIA_TITLE)

        // Determine the search mode and use the corresponding extras.
        when {
            mediaFocus == null -> {
                // 'Unstructured' search mode (backward compatible)
                playUnstructuredSearch(query)
            }
            mediaFocus.compareTo("vnd.android.cursor.item/*") == 0 -> {
                if (query?.isNotEmpty() == true) {
                    // 'Unstructured' search mode.
                    playUnstructuredSearch(query)
                } else {
                    // 'Any' search mode.
                    playResumeLastPlaylist()
                }
            }
            mediaFocus.compareTo(MediaStore.Audio.Genres.ENTRY_CONTENT_TYPE) == 0 -> {
                // 'Genre' search mode.
                playGenre(genre)
            }
            mediaFocus.compareTo(MediaStore.Audio.Artists.ENTRY_CONTENT_TYPE) == 0 -> {
                // 'Artist' search mode.
                playArtist(artist, genre)
            }
            mediaFocus.compareTo(MediaStore.Audio.Albums.ENTRY_CONTENT_TYPE) == 0 -> {
                // 'Album' search mode.
                playAlbum(album, artist)
            }
            mediaFocus.compareTo("vnd.android.cursor.item/audio") == 0 -> {
                // 'Song' search mode.
                playSong(album, artist, genre, title)
            }
            mediaFocus.compareTo(MediaStore.Audio.Playlists.ENTRY_CONTENT_TYPE) == 0 -> {
                // 'Playlist' search mode.
                playPlaylist(album, artist, genre, playlist, title)
            }
        }
    }
}

protected void onCreate(Bundle savedInstanceState) {
    //...
    Intent intent = this.getIntent();
    if (intent.getAction().compareTo(MediaStore.INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH) == 0) {

        String mediaFocus = intent.getStringExtra(MediaStore.EXTRA_MEDIA_FOCUS);
        String query = intent.getStringExtra(SearchManager.QUERY);

        // Some of these extras might not be available depending on the search mode.
        String album = intent.getStringExtra(MediaStore.EXTRA_MEDIA_ALBUM);
        String artist = intent.getStringExtra(MediaStore.EXTRA_MEDIA_ARTIST);
        String genre = intent.getStringExtra("android.intent.extra.genre");
        String playlist = intent.getStringExtra("android.intent.extra.playlist");
        String title = intent.getStringExtra(MediaStore.EXTRA_MEDIA_TITLE);

        // Determine the search mode and use the corresponding extras.
        if (mediaFocus == null) {
            // 'Unstructured' search mode (backward compatible).
            playUnstructuredSearch(query);

        } else if (mediaFocus.compareTo("vnd.android.cursor.item/*") == 0) {
            if (query.isEmpty()) {
                // 'Any' search mode.
                playResumeLastPlaylist();
            } else {
                // 'Unstructured' search mode.
                playUnstructuredSearch(query);
            }

        } else if (mediaFocus.compareTo(MediaStore.Audio.Genres.ENTRY_CONTENT_TYPE) == 0) {
            // 'Genre' search mode.
            playGenre(genre);

        } else if (mediaFocus.compareTo(MediaStore.Audio.Artists.ENTRY_CONTENT_TYPE) == 0) {
            // 'Artist' search mode.
            playArtist(artist, genre);

        } else if (mediaFocus.compareTo(MediaStore.Audio.Albums.ENTRY_CONTENT_TYPE) == 0) {
            // 'Album' search mode.
            playAlbum(album, artist);

        } else if (mediaFocus.compareTo("vnd.android.cursor.item/audio") == 0) {
            // 'Song' search mode.
            playSong(album, artist, genre, title);

        } else if (mediaFocus.compareTo(MediaStore.Audio.Playlists.ENTRY_CONTENT_TYPE) == 0) {
            // 'Playlist' search mode.
            playPlaylist(album, artist, genre, playlist, title);
        }
    }
}

New note

Creating a note is a common action for note-taking apps. Create an intent filter to advertise your app's ability to perform this action using the information in the following section.

Create a note

To create a new note, use the ACTION_CREATE_NOTE action and specify note details such as the subject and text using following extras.

Note: Apps must ask for confirmation from the user before completing this action.

Action

ACTION_CREATE_NOTE

Data URI Scheme

None

MIME Type

PLAIN_TEXT_TYPE

"*/*"

Extras

EXTRA_NAME

A string indicating the title or subject of the note.

EXTRA_TEXT

A string indicating the text of the note.

Example intent:

Kotlin

fun createNote(subject: String, text: String) {
    val intent = Intent(NoteIntents.ACTION_CREATE_NOTE).apply {
        putExtra(NoteIntents.EXTRA_NAME, subject)
        putExtra(NoteIntents.EXTRA_TEXT, text)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

Java

public void createNote(String subject, String text) {
    Intent intent = new Intent(NoteIntents.ACTION_CREATE_NOTE)
            .putExtra(NoteIntents.EXTRA_NAME, subject)
            .putExtra(NoteIntents.EXTRA_TEXT, text);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="com.google.android.gms.actions.CREATE_NOTE" />
        <category android:name="android.intent.category.DEFAULT" />
        <data android:mimeType="*/*" />
    </intent-filter>
</activity>

Phone

Initiating a call is a common action for phone apps. Create an intent filter to advertise your app's ability to perform this action using the information in the following section.

Initiate a phone call

To open the phone app and dial a phone number, use the ACTION_DIAL action and specify a phone number using the following URI scheme. When the phone app opens, it displays the phone number, and the user must tap the Call button to begin the phone call.

Google Voice Actions

• "call 555-5555"
• "call bob"
• "call voicemail"

To place a phone call directly, use the ACTION_CALL action and specify a phone number using the following URI scheme. When the phone app opens, it begins the phone call. The user doesn't need to tap the Call button.

The ACTION_CALL action requires that you add the CALL_PHONE permission to your manifest file:

<uses-permission android:name="android.permission.CALL_PHONE" />

Action

• ACTION_DIAL - Opens the dialer or phone app.
• ACTION_CALL - Places a phone call (requires the CALL_PHONE permission)

Data URI Scheme

• tel:<phone-number>
• voicemail:<phone-number>

MIME Type

None

Valid telephone numbers are those defined in the IETF RFC 3966. Valid examples include the following:

• tel:2125551212
• tel:(212) 555 1212

The Phone app's dialer is good at normalizing schemes, such as telephone numbers. So the scheme described isn't strictly required in the Uri.parse() method. However, if you haven't tried a scheme or are unsure whether it can be handled, use the Uri.fromParts() method instead.

Example intent:

Kotlin

fun dialPhoneNumber(phoneNumber: String) {
    val intent = Intent(Intent.ACTION_DIAL).apply {
        data = Uri.parse("tel:$phoneNumber")
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

Java

public void dialPhoneNumber(String phoneNumber) {
    Intent intent = new Intent(Intent.ACTION_DIAL);
    intent.setData(Uri.parse("tel:" + phoneNumber));
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Search

The following are common actions for search apps, including the information you need to create an intent filter to advertise your app's ability to perform each action.

Search using a specific app

Google Voice Actions

• "search for cat videos on myvideoapp"

To support search within the context of your app, declare an intent filter in your app with the SEARCH_ACTION action, as shown in the following intent filter example.

Note: We don't recommend using SEARCH_ACTION for app search. Instead, implement the GET_THING action to leverage Google Assistant's built-in support for in-app search. For more information, see the Google Assistant App Actions documentation.

Action

"com.google.android.gms.actions.SEARCH_ACTION"

Support search queries from Google Voice Actions.

Extras

QUERY

A string that contains the search query.

Example intent filter:

<activity android:name=".SearchActivity">
    <intent-filter>
        <action android:name="com.google.android.gms.actions.SEARCH_ACTION"/>
        <category android:name="android.intent.category.DEFAULT"/>
    </intent-filter>
</activity>

Perform a web search

To initiate a web search, use the ACTION_WEB_SEARCH action and specify the search string in the SearchManager.QUERY extra.

Action

ACTION_WEB_SEARCH

Data URI Scheme

None

MIME Type

None

Extras

SearchManager.QUERY

The search string.

Example intent:

Kotlin

fun searchWeb(query: String) {
    val intent = Intent(Intent.ACTION_WEB_SEARCH).apply {
        putExtra(SearchManager.QUERY, query)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

Java

public void searchWeb(String query) {
    Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
    intent.putExtra(SearchManager.QUERY, query);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Settings

To open a screen in the system Settings app when your app requires the user to change something, use one of the following intent actions:

Action

ACTION_SETTINGS
ACTION_WIRELESS_SETTINGS
ACTION_AIRPLANE_MODE_SETTINGS
ACTION_WIFI_SETTINGS
ACTION_APN_SETTINGS
ACTION_BLUETOOTH_SETTINGS
ACTION_DATE_SETTINGS
ACTION_LOCALE_SETTINGS
ACTION_INPUT_METHOD_SETTINGS
ACTION_DISPLAY_SETTINGS
ACTION_SECURITY_SETTINGS
ACTION_LOCATION_SOURCE_SETTINGS
ACTION_INTERNAL_STORAGE_SETTINGS
ACTION_MEMORY_CARD_SETTINGS

For additional settings screens that are available, see the Settings documentation .

Data URI Scheme

None

MIME Type

None

Example intent:

Kotlin

fun openWifiSettings() {
    val intent = Intent(Settings.ACTION_WIFI_SETTINGS)
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

Java

public void openWifiSettings() {
    Intent intent = new Intent(Settings.ACTION_WIFI_SETTINGS);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Text messaging

Composing an SMS/MMS message with an attachment is a common action for text messaging apps. Create an intent filter to advertise your app's ability to perform this action using the information in the following section.

Compose an SMS/MMS message with attachment

To initiate an SMS or MMS text message, use one of the following intent actions and specify message details such as the phone number, subject, and message body using the following extra keys.

Action

ACTION_SENDTO or
ACTION_SEND or
ACTION_SEND_MULTIPLE

Data URI Scheme

sms:<phone_number>

smsto:<phone_number>

mms:<phone_number>

mmsto:<phone_number>

These schemes are all handled the same way.

MIME Type

"text/plain"

"image/*"

"video/*"

Extras

"subject"

A string for the message subject (usually for MMS only).

"sms_body"

A string for the text message.

EXTRA_STREAM

A Uri pointing to the image or video to attach. If using the ACTION_SEND_MULTIPLE action, this extra is an ArrayList of Uri objects pointing to the images or videos to attach.

Example intent:

Kotlin

fun composeMmsMessage(message: String, attachment: Uri) {
    val intent = Intent(Intent.ACTION_SENDTO).apply {
        type = HTTP.PLAIN_TEXT_TYPE
        putExtra("sms_body", message)
        putExtra(Intent.EXTRA_STREAM, attachment)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

Java

public void composeMmsMessage(String message, Uri attachment) {
    Intent intent = new Intent(Intent.ACTION_SENDTO);
    intent.setType(HTTP.PLAIN_TEXT_TYPE);
    intent.putExtra("sms_body", message);
    intent.putExtra(Intent.EXTRA_STREAM, attachment);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

If you want to make sure that your intent is handled only by a text messaging app, and not other email or social apps, then use the ACTION_SENDTO action and include the "smsto:" data scheme as shown in the following example:

Kotlin

fun composeMmsMessage(message: String, attachment: Uri) {
    val intent = Intent(Intent.ACTION_SEND).apply {
        data = Uri.parse("smsto:")  // Only SMS apps respond to this.
        putExtra("sms_body", message)
        putExtra(Intent.EXTRA_STREAM, attachment)
    }
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

Java

public void composeMmsMessage(String message, Uri attachment) {
    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setData(Uri.parse("smsto:"));  // Only SMS apps respond to this.
    intent.putExtra("sms_body", message);
    intent.putExtra(Intent.EXTRA_STREAM, attachment);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.intent.action.SEND" />
        <data android:type="text/plain" />
        <data android:type="image/*" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

Note: If you're developing an SMS/MMS messaging app, you must implement intent filters for several additional actions in order to be available as the default SMS app on Android 4.4 and higher. For more information, see the documentation at Telephony.

Web browser

Loading a web URL is a common action for web browser apps. Create an intent filter to advertise your app's ability to perform this action using the information in the following section.

Load a web URL

Google Voice Actions

• "open example.com"

To open a web page, use the ACTION_VIEW action and specify the web URL in the intent data.

Action

ACTION_VIEW

Data URI Scheme

http:<URL>
https:<URL>

MIME Type

"text/plain"

"text/html"

"application/xhtml+xml"

"application/vnd.wap.xhtml+xml"

Example intent:

Kotlin

fun openWebPage(url: String) {
    val webpage: Uri = Uri.parse(url)
    val intent = Intent(Intent.ACTION_VIEW, webpage)
    if (intent.resolveActivity(packageManager) != null) {
        startActivity(intent)
    }
}

Java

public void openWebPage(String url) {
    Uri webpage = Uri.parse(url);
    Intent intent = new Intent(Intent.ACTION_VIEW, webpage);
    if (intent.resolveActivity(getPackageManager()) != null) {
        startActivity(intent);
    }
}

Example intent filter:

<activity ...>
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <!-- Include the host attribute if you want your app to respond
             only to URLs with your app's domain. -->
        <data android:scheme="http" android:host="www.example.com" />
        <category android:name="android.intent.category.DEFAULT" />
        <!-- The BROWSABLE category is required to get links from web pages. -->
        <category android:name="android.intent.category.BROWSABLE" />
    </intent-filter>
</activity>

Tip: If your Android app provides functionality similar to your web site, include an intent filter for URLs that point to your web site. Then, if users have your app installed, links from emails or other web pages pointing to your web site open your Android app instead of your web page. Learn more in Handling Android App Links.

Starting in Android 12 (API level 31), a generic web intent resolves to an activity in your app only if your app is approved for the specific domain contained in that web intent. If your app isn't approved for the domain, the web intent resolves to the user's default browser app instead.

Verify intents with the Android Debug Bridge

To verify that your app responds to the intents that you want to support, you can use the adb tool to fire specific intents by doing the following:

1. Set up an Android device for development or use a virtual device.
2. Install a version of your app that handles the intents you want to support.
3. Fire an intent using adb:

   adb shell am start -a <ACTION> -t <MIME_TYPE> -d <DATA> \
     -e <EXTRA_NAME> <EXTRA_VALUE> -n <ACTIVITY>
   

   For example:

   adb shell am start -a android.intent.action.DIAL \
     -d tel:555-5555 -n org.example.MyApp/.MyActivity
   

4. If you define the required intent filters, handle the intent.

For more information, see Issue shell commands.