> For the complete documentation index, see [llms.txt](https://docs.hackle.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hackle.io/en/development-guide/react-native/push-message/rn-android-push-message.md).

# Android Push Message Integration

{% stepper %}
{% step %}
**Integrate Firebase Project**

To use push messages in your Android app, you need to configure the integration between your Hackle workspace and a Firebase project.

For details, refer to [Android FCM Integration](/en/external-link/crm-channels/fcm-integration.md).
{% endstep %}

{% step %}
**Integrate Firebase Cloud Messaging SDK**

Complete the Android app setup by referring to the [Firebase SDK Integration Guide](https://firebase.google.com/docs/android/setup) and the [Firebase Cloud Messaging Installation Guide](https://firebase.google.com/docs/cloud-messaging/android/client).
{% endstep %}

{% step %}
**Integrate with the Hackle SDK**

Refer to [SDK Integration](/en/development-guide/react-native.md) to add the Hackle SDK dependency and initialize the SDK.

The push token is automatically collected when the app launches.

{% hint style="info" %}
Once the SDK integration is complete, push tokens are automatically collected, and push reception and push click handling become available.
{% endhint %}
{% endstep %}

{% step %}
**Test Push Messages**

**Verify Token**

* You can verify the token configured on an Android device through the [User Identifier Guide](/en/development-guide/react-native/react-native-user-explorer.md).
* You can verify the Android push token assigned to a specific user through the [User Profile Guide](/en/user-view/user-profile.md).

**Test Sending**

* Refer to the [Push Message Test Send Guide](/en/crm-marketing/push-message-guide/create-campaign.md#id-3-1) to verify push messages on an Android device.
  {% endstep %}

{% step %}
**Push Message Reception**

When a push is received, an icon is displayed in the status bar and notification center.

* On Samsung Galaxy Android smartphones, the app icon is displayed.
* On standard Android smartphones or simulators, a white circle icon is displayed.
* If you have used the push message icon change feature, the changed icon is displayed.
  {% endstep %}
  {% endstepper %}

## Deep Link Navigation

Hackle push messages support deep link navigation on click.

For information on how to use React Native deep links in an Android environment, refer to the [React Native Deep Link Guide](https://reactnative.dev/docs/linking?syntax=android).

{% hint style="warning" %}
When connected to a remote JS debugger, React Native's `Linking.getInitialURL()` returns `null`, causing a [known issue](https://reactnative.dev/docs/linking?syntax=android\&language=typescript\&ios-language=swift#getinitialurl) where the deep link URL cannot be retrieved.
{% endhint %}

## Push Message Icon Change

{% hint style="info" %}
This feature is supported in React Native SDK version 3.25.0 and above.
{% endhint %}

{% hint style="warning" %}
Due to Google policy, icons that include color cannot be set as push icons on standard Android smartphones.
{% endhint %}

Hackle push messages support push icon customization. You can change the push icon using local app resources by assigning resources to pre-defined keys in `AndroidManifest.xml`.

{% hint style="info" %}
For details on small\_icon, large\_icon, and color, refer to the [Android Push Design Guide](https://developer.android.com/design/ui/mobile/guides/home-screen/notifications?hl=ko#notification-header).
{% endhint %}

<table><thead><tr><th width="400">key</th><th>Description</th></tr></thead><tbody><tr><td><code>io_hackle_android_default_notification_small_icon</code></td><td>Sets the small icon.</td></tr><tr><td><code>io_hackle_android_default_notification_large_icon</code></td><td>Sets the large icon.</td></tr><tr><td><code>io_hackle_android_default_notification_color</code></td><td>Sets the small icon background color.</td></tr></tbody></table>

#### Example

```xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">
    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
    <application
        android:name=".MainApplication"
        >
       ...
       <meta-data
            android:name="io_hackle_android_default_notification_small_icon"
            android:resource="@drawable/ic_push_small"/>

       <meta-data
            android:name="io_hackle_android_default_notification_large_icon"
            android:resource="@drawable/ic_push_large"/>

       <meta-data
            android:name="io_hackle_android_default_notification_color"
            android:resource="@color/pie" />
       ...
    </application>
</manifest>
```

### Changing the Push Message Icon from the Dashboard

When a push icon is configured in the Dashboard, it modifies the large icon of the push message.

* If a push icon is set via local resources and a push icon is also sent from the Dashboard, the icon configured in the Dashboard takes precedence.

## Push Channel Support

{% hint style="info" %}
This feature is supported in React Native SDK version 3.26.0 and above.
{% endhint %}

With Hackle push messages, you can receive pushes through a channel pre-declared in your app. If a push is received with a channel ID that does not exist in the app, it falls back to the default channel provided by Hackle.

{% hint style="info" %}
For detailed information on adding push channels to your app, refer to the [Android Developer Documentation](https://developer.android.com/develop/ui/views/notifications/channels?hl=ko).

If you want to display a notification popup when a push is received, as on iOS, set the channel importance to `IMPORTANCE_HIGH`.
{% endhint %}

#### Example

The following is an example of creating a channel in the `onCreate` function of the Application class.

```kotlin
import android.app.NotificationChannel
import android.app.NotificationManager
import android.content.Context
import android.os.Build
import androidx.annotation.RequiresApi


override fun onCreate() {
    ... // 기존 구현
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        createNotificationChannel(applicationContext, "importance", "importance", NotificationManager.IMPORTANCE_HIGH)
    }
}


@RequiresApi(Build.VERSION_CODES.O)
private fun createNotificationChannel(context: Context, channelId: String, channelName: String, importance: Int) {
    val notificationManager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    if (notificationManager.getNotificationChannel(channelId) != null) {
        return
    }

    val channel = NotificationChannel(
        channelId,
        channelName,
        importance
    )
    notificationManager.createNotificationChannel(channel)
}
```


---

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