Firebase Cloud Messaging (FCM) - Launch Activity w

Question

I'm trying to open a specific activity when the user clicks the notification, when the app is in the background, with some extra parameters. I'm using the click_action and it's working fine, the app opens the desired Activity.

Now I need the server to pass an extra parameter, an id, to this Activity so I can present the desired details associated with the notification. Like an e-mail application, that when we click on the notification opens the details of that specif email.

How can I do this?

Answer 1

Add addition information to Intent that you use to start Activity, and in activity in method onCreate use getIntent().getExtras() to use them. For example:

Starting activity:

Intent intent = new Intent(context, TargetActivity.class);
Bundle bundle = new Bundle();
bundle.putString("extraName", "extraValue"); 
intent.putExtras(bundle);
startActivity(intent); 

In activity

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Bundle bundle = getIntent().getExtras();
    String value = bundle.getString("extraName");
    ....
}

Answer 2

Ok, I have found the solution.

This is the json that I'm sending from the server to the app

{
  "registration_ids": [
    "XXX",
    ...
  ],
  "data": {
    "id_offer": "41"
  },
  "notification": {
    "title": "This is the Title",
    "text": "Hello I'm a notification",
    "icon": "ic_push",
    "click_action": "ACTIVITY_XPTO"
  }
}

At the AndroidManifest.xml

<activity
    android:name=".ActivityXPTO"
    android:screenOrientation="sensor"
    android:windowSoftInputMode="stateHidden">
    <intent-filter>
        <action android:name="ACTIVITY_XPTO" />        
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

When the app is closed or in background and the user clicks on the notification it opens my ActivityXPTO, to retrieve the id_offer I only need to do

public class ActivityXPTO extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ...

        String idOffer = "";

        Intent startingIntent = getIntent();
        if (startingIntent != null) {
            idOffer = startingIntent.getStringExtra("id_offer"); // Retrieve the id
        }

        getOfferDetails(id_offer);
    }

    ...
}

That's it...