Gradle Issue : Manifest merger failed when importing library project

It seems to be the fault of the mainfest Merger tool for gradle.

Solved it by adding to my manifest tag xmlns:tools="http://schemas.android.com/tools"

Then added tools:replace="android:icon,android:theme" to the application tag

This tells the merger to use my manifest icon and theme and not of other libraries

Example:-

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"  // add tools line here 

    package="yourpackage">

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:supportsRtl="true"

        android:theme="@style/AppTheme"

        tools:replace="android:icon"> ///add this line 

.....

</application>

</manifest>

Hope it helps thanks