Oreo Notification Bar Round Icon

问题:

I want to know that how can I change the notification bar small icon in android Oreo (API 26). It has round white icon showing in the notification bar. How can I change it? Manifest file default notification icon set as below.

<meta-data
     android:name="com.google.firebase.messaging.default_notification_icon"
     android:resource="@drawable/ic_status" />

See the image below

回答1:

1. Remove <meta-data> tag from AndroidManifest.xml.
2. Notification Builder has .setSmallIcon(int icon, int level) which accepts icon as a compulsory argument & level parameter as an optional argument.

NOTE: .setSmallIcon accepts drawables & DOES NOT accept mipmaps.

This is how it should be according to Android 8.0 Oreo Notification Channels & behaviour changes:

public class MainActivity extends AppCompatActivity {

    private CharSequence name;
    private int notifyId;
    private int importance;
    private String id;
    private String description;

    private Notification mNotification;
    private NotificationManager mNotificationManager;
    private NotificationChannel mChannel;
    private PendingIntent mPendingIntent;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        binding.btnNotification.setOnClickListener(v -> notification());
    }

    private void notification() {

        mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notifyId = 1;
        description = "Hello World, welcome to Android Oreo!";

        Intent intent = new Intent(this, MainActivity.class);
        mPendingIntent = PendingIntent.getActivity(this, notifyId, intent, PendingIntent.FLAG_UPDATE_CURRENT);

        if (SDK_INT >= O) {
            id = "id";
            name = "a";
            importance = NotificationManager.IMPORTANCE_HIGH;

            mChannel = new NotificationChannel(id, name, importance);
            mChannel.setDescription(description);
            mChannel.enableLights(true);
            mChannel.setLightColor(Color.WHITE);
            mChannel.enableVibration(true);
            mChannel.setVibrationPattern(new long[] {100, 300, 200, 300});
            mNotificationManager.createNotificationChannel(mChannel);

            mNotification = new Notification.Builder(MainActivity.this, id)
                .setContentTitle(id)
                .setContentText(description)
                .setContentIntent(mPendingIntent)
                .setSmallIcon(R.drawable.ic_launcher_foreground)
                .build();
        } else {
            mNotification = new Notification.Builder(MainActivity.this)
                .setContentTitle(id)
                .setContentText(description)
                .setContentIntent(mPendingIntent)
                .setSmallIcon(R.drawable.ic_launcher_foreground)
                .setLights(Color.WHITE, Color.RED, Color.GREEN)
                .setVibrate(new long[] {100, 300, 200, 300})
                .build();
        }
            mNotificationManager.notify(notifyId, mNotification);
    }
}

回答2:

There is a bug in Firebase SDK 11.8.0 on Android 8.0 (API 26), which causes the display of a white version of the app's launcher icon in the status bar instead of the notification icon.

Some people have fixed it by overriding the Application class's getResources() method.

Another way that worked for me was to use an HTTP POST request to send the notification as a data message:

https://fcm.googleapis.com/fcm/send
Content-Type:application/json
Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA
{
   "to": "/topics/test",
   "data": {
       "title": "Update",
       "body": "New feature available"
    }
 }

And then subclass FirebaseMessagingService to display the notification programmatically:

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Intent i = new Intent(context, HomeActivity.class);
        PendingIntent pi = PendingIntent.getActivity(this, 0, i, 
                                         PendingIntent.FLAG_ONE_SHOT);

        NotificationCompat.Builder builder = 
            new NotificationCompat.Builder(this, GENERAL_CHANNEL_ID)
                 .setSmallIcon(R.drawable.ic_stat_chameleon)
                 .setContentTitle(remoteMessage.getData().get("title"))
                 .setContentText(remoteMessage.getData().get("body"))
                 .setContentIntent(pi);

        NotificationManager manager = 
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        manager.notify(0, builder.build());
    }
}

In the end, I got this, even on Android 8.0: