Setting up push notifications for your Android app is easy

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.

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Using a cross-platform framework?

We have specific instructions for Cordova, React Native and Flutter.

Prerequisites

You'll need:

• Android Studio
• A device or emulator with Google Play services installed and up-to-date
• A Firebase account
• An AndroidX enabled app. Follow this guide if your app does not use AndroidX yet.

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

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Upgrading from our SDK version 3.x?

Follow this guide to update your integration.

Step 1. Create your project

Click on New Project:

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

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Already have a project?

Just add the Android platform to any existing project by going to Settings, selecting the first tab named after your project and clicking Edit. You'll be presented a form that lets you add a platform.

Step 2. Fill your Firebase credentials in the dashboard

1. Locate your Server key and Sender ID as explained in the Firebase / Locating your Sender ID and Server key article.

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

As JCenter is sunsetting, please ensure that you include the Maven Central repository in your build configuration. Open your root build.gradle:

allprojects {
    repositories {
        // Make sure the following line is present
        mavenCentral()
    }
}

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://docs.wonderpush.com/changelog
    // WonderPush SDK core module
    implementation 'com.wonderpush:wonderpush-android-sdk:4.+'
    // WonderPush compatibility module with Firebase Cloud Messaging
    implementation 'com.wonderpush:wonderpush-android-sdk-fcm:1.+'
}

// Make sure you can use Java 8 language features
// See: https://developer.android.com/studio/write/java8-support.html#supported_features
android {
  // Configure only for each module that uses Java 8
  // language features (either in its source code or
  // through dependencies).
  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }
  // For Kotlin projects
  kotlinOptions {
    jvmTarget = "1.8"
  }
}

Step 4. Configure SDK and prompt users

Build file

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.

Prompting users

Starting Android 13, it is necessary to call WonderPush.subscribeToNotifications() in order to subscribe users. This call will have no effect on earlier version of Android. Best practices tell us that this call should be made after showing users a rationale about the benefits they'll get from subscribing to push, rather that directly on app startup.

// Shows the push permission prompt when necessary
WonderPush.subscribeToNotifications();

// You can also use this variation that will show an alert dialog
// to users who have repeatedly denied the permission, taking them to the settings
// of your app where they can flip the permission switch:
WonderPush.subscribeToNotifications(true);

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Controlling the Android 13+ permission prompt timing

In order to control when the permission prompt is triggered when running on Android 13 devices, you will need to update your app/build.gradle to use:

android {
    compileSdkVersion 33

    defaultConfig {
        targetSdkVersion 33
    }
}

If you do not do so, the user will be prompted for permission right at application launch.

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.

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Getting an error?

• Messages about targetSdkVersion, compileSdkVersion or minSdkVersion? Make sure you use minimum required versions
• Resolve error All com.android.support libraries must use the exact same version specification

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.** {
    *;
}

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When using ProGuard, don't forget to save your mapping.txt of each release in a safe place.
This file is found in app/build/outputs/mapping/release/mapping.txt.

Read more about decoding obfuscated stack traces.

Receive your first push!

Build and run your application.

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

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Congratulations, you're done!