How to setup Android Firebase Notification in Manifest?
<p>I'm trying to setup Firebase notifications. I did changes in app level and root level build.gradle. But still, its giving me error in Manifest for MyFirebaseMessagingService. Error is Unresolved Class.</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
</code></pre>

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<pre><code>&lt;uses-permission android:name="android.permission.INTERNET" /&gt;
&lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt;
&lt;uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /&gt;
&lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /&gt;

&lt;application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme"&gt;
    &lt;activity android:name=".MainActivity"&gt;


        &lt;intent-filter&gt;
            &lt;action android:name="android.intent.action.MAIN" /&gt;
            &lt;action android:name="com.google.firebase.MESSAGING_EVENT"/&gt;
            &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
        &lt;/intent-filter&gt;
    &lt;/activity&gt;
    &lt;activity android:name=".s" /&gt;
    &lt;activity android:name=".im" /&gt;
    &lt;activity android:name=".Main2Activity" /&gt;
    &lt;activity android:name=".sactivity" /&gt;
    &lt;service
        android:name=".MyFirebaseMessagingService"&gt;
        &lt;intent-filter&gt;
            &lt;action android:name="com.google.firebase.MESSAGING_EVENT"/&gt;
        &lt;/intent-filter&gt;
    &lt;/service&gt;
    &lt;activity
        android:name=".ScrollingActivity"
        android:label="@string/title_activity_scrolling"
        android:theme="@style/AppTheme.NoActionBar"&gt;&lt;/activity&gt;
&lt;/application&gt;
</code></pre>

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