I already search the article and search question on this forum both only showing "how to setting gradle sub directory"
I already set the build.gradle
apply plugin: 'com.android.application'
android {
    compileSdkVersion 21
    buildToolsVersion "21.1.0"
    defaultConfig {
        applicationId "com.ardyfeb.kolabs"
        minSdkVersion 14
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {
        main {
          res.srcDirs = [
               'src/main/res/layout/partials',
               'src/main/res/layout',
               'src/main/res'
          ]
        }
    }
}
dependencies {
    compile 'com.android.support:recyclerview-v7:+'
    compile 'com.android.support:multidex:+'
    compile 'com.android.support:cardview-v7:+'
    compile 'com.android.support:design:+'
    compile 'com.android.support:support-v13:+'
    compile 'com.android.support:appcompat-v7:+'
    compile 'com.android.support:support-v4:+'
    compile fileTree(dir: 'libs', include: ['*.jar'])
}
My directory tree
src/main/res
      -- layout
           -  main.xml
           -- partials
               - header.xml
My question is :
How to include the partials/header.xml ? With  tag
Example :
<include
        layout="@layout/toolbar"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:id="@+id/header"/>
 
    