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Prerequisites

1. Create an app on Firebase Cloud Messaging Console. You may use this guide for reference (section Manually add Firebase).

2. Get iOS push certificates by following steps 2.1. to 2.3. of Native iOS Integration guide.

3. Configure the App in Pushwoosh Control Panel. Please follow Android configuration guide for Andriod and Step 2.4. of iOS Integration guide for iOS.

Enable push notifications in your project

First, you need to add the pushwoosh package to your project:

1. Add a dependency to your pubspec.yaml file:

dependencies:
  pushwoosh: ^1.8.0

2. Install the package from the command line:

$ flutter packages get

3. Import the package in your dart code

import 'package:pushwoosh/pushwoosh.dart';

Second, place the google-services.json file into android/app folder in your project directory.

Third, initialize the plugin:

Pushwoosh.initialize({"app_id": "YOUR_APP_ID", "sender_id": "FCM_SENDER_ID"});

To register for push notifications, call the following method:

Pushwoosh.getInstance.registerForPushNotifications();

To process various events, use the corresponding listeners as follows. Push receipt:

Pushwoosh.getInstance.onPushReceived.listen((event) {
...
});

Push open:

Pushwoosh.getInstance.onPushAccepted.listen((event) {
...
});

Deep Link open:

Pushwoosh.getInstance.onDeepLinkOpened.listen((link) {
...
});

All done!

Using ProGuard

Thus, you may get this exception:

java.lang.IllegalStateException: Could not find class for name: com.pushwoosh.plugin.PushwooshNotificationServiceExtension

There are two solutions in this case:

1. Use the flutter build apk --no-shrink command to compile your code without obfuscation.

2. Or you can manually enable ProGuard and add the necessary rules.

To enable ProGuard for your project, add the following strings to your build.gradle file:

build.gradle
buildTypes {
        release {
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
​
            signingConfig signingConfigs.debug
        }
    }

Then, add the following rules to the android/app/proguard-rules.pro

proguard-rules.pro
#Pushwoosh Flutter
-keep class com.pushwoosh.plugin.PushwooshPlugin { *; }
-keep class com.pushwoosh.plugin.PushwooshNotificationServiceExtension { *; }

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