Push notifications are the ideal solution to re-engage users and bring them back to your app.
This guide shows you how to configure an Android app to send and receive push notifications.

Estimated setup time: 10 minutes.

Prerequisites

You'll need:

• Android Studio
• A device or emulator with Google Play services installed and up-to-date
• A Firebase account

If you haven't already, sign up for a free account on wonderpush.com.

Step 1. Create your project

Click on New Project:

Choose a name for your project and select Android as a platform then click Create:

Step 2. Fill your Firebase credentials in the dashboard

1. Locate your Server Key and Sender ID in the Firebase project Cloud Messaging settings.

2. Go to your WonderPush dashboard, in the Settings page, select the Platforms tab and click on Android application.

3. Paste the Server key.
4. Click Save.

Step 3. Add the SDK as a dependency

Add the WonderPush Android SDK as a dependency of your app/build.gradle file:

dependencies {
    // Android Studio will recommend to replace the + range with a specific version.
    // If you do so, do not forget to upgrade it regularly.
    // See: https://github.com/wonderpush/wonderpush-android-sdk/releases
    // See: https://discuss.wonderpush.com/c/announcements
    implementation 'com.wonderpush:wonderpush-android-sdk:3.+'
}

Step 4. Configure SDK

Configure the WonderPush Android SDK from your app/build.gradle file:

android {
    defaultConfig {
        // Note that it's important to keep the double quotes as part of the third argument
        // as this represents a string in Java code
        buildConfigField 'String', 'WONDERPUSH_CLIENT_ID', '"YOUR_CLIENT_ID"'
        buildConfigField 'String', 'WONDERPUSH_CLIENT_SECRET', '"YOUR_CLIENT_SECRET"'
        buildConfigField 'String', 'WONDERPUSH_SENDER_ID', '"YOUR_SENDER_ID"'
    }
}

Replace YOUR_CLIENT_ID and YOUR_CLIENT_SECRET with the appropriate values you find in the Platforms page, in the Android application section.
Replace YOUR_SENDER_ID with the Firebase Sender ID from step 2
Note that it's important to keep the double quotes as part of the third argument as this represents a string in Java code.

Step 5. Sync Gradle and build

Click Sync now in the banner that showed up in your editor, or click the Sync project with Gradle files button in the toolbar.
Then build your project.

Step 6. Setup ProGuard

Recommended

In order to have meaningful stack traces of your application released in Google Play, we recommend that you keep ProGuard from obfuscating WonderPush class names, file names and line numbers.

Add the following to your proguard-rules.pro file:

# For easier debugging, we strongly recommend keeping WonderPush class names unobfuscated
-keepattributes SourceFile,LineNumberTable,Signature
-keepnames class com.wonderpush.sdk.** {
    *;
}
-keepnames interface com.wonderpush.sdk.** {
    *;
}

Receive your first push!

Build and run your application.

Wait a couple of minutes and receive the default welcome notification: