Android NotificationManager giving me “no valid small icon” error

Question

I am having a strange error with notification manager.

@Override
public void onMessageReceived(String from, Bundle data)
{
     Log.i(TAG, \"IP : \" + (Strin         


        

Answer 1

This suddenly started happening to my application. After some research, I found this change in my manifest file actually started causing it.

from:

  <uses-sdk android:minSdkVersion="21" />

to:

  <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />

I saw somewhere that somebody noted that it only checks for the icon if the target sdk version is set. Sure enough, in the source, there is this :

if (mContext.getApplicationInfo().targetSdkVersion > Build.VERSION_CODES.LOLLIPOP_MR1) {
    if (notification.getSmallIcon() == null) {
        throw new IllegalArgumentException("Invalid notification (no valid small icon): "
                + notification);
    }
}

Luckily, the solution was simple, just define the icon in the manifest:

  <application android:label="MyApp" android:icon="@mipmap/icon" >

Answer 2

You have not called setSmallIcon() on the NotificationCompat.Builder. This provides the icon that will go in the status bar while the Notification is active.

Answer 3

According to the Android NotificationManager Source Code

if (mContext.getApplicationInfo().targetSdkVersion > Build.VERSION_CODES.LOLLIPOP_MR1) {
    if (notification.getSmallIcon() == null) {
        throw new IllegalArgumentException("Invalid notification (no valid small icon): "
                + notification);
    }
}

This error only happened when you set target API > LOLLIPOP_MR1(22) and notification do not have a small icon.

Answer 4

You're actually not setting an icon for the push notification. Add .setSmallIcon(R.drawable.your_icon) to your notification.

 NotificationCompat.Builder notification = new NotificationCompat.Builder(this)
            .setContentTitle("New Password Request From " + (String) data.get("ip"))
            .setSmallIcon(R.drawable.your_icon)
            .addAction(acceptAction)
            .addAction(declineAction);