material design - CoordinatorLayout not working in Android Studio 2.1.2? -

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my android studio unable find coordinatorlayout class.

screenshot :

enter image description here

it says:

the following classes not found: -android.support.design.widget.coordinatorlayout.

this xml code:

<?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.coordinatorlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingbottom="@dimen/activity_vertical_margin" android:paddingleft="@dimen/activity_horizontal_margin" android:paddingright="@dimen/activity_horizontal_margin" android:paddingtop="@dimen/activity_vertical_margin" tools:context="com.musical_box.musicbox.mainactivity">   <framelayout     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:id="@+id/player_control_container"> </framelayout> </android.support.design.widget.coordinatorlayout>

i know question has been asked lot of times have tried of solutions, , none worked me. 1 thing noticed android studio not suggesting coordinatorlayout while writing code. guessing there missing libraries. here code gradle build:

apply plugin: 'com.android.application'  android {     compilesdkversion 24     buildtoolsversion "24.0.0"      defaultconfig {         applicationid "com.musical_box.musicbox"         minsdkversion 15         targetsdkversion 24         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile filetree(dir: 'libs', include: ['*.jar'])     testcompile 'junit:junit:4.12'     compile 'com.android.support:appcompat-v7:24.0.0'     compile 'com.android.support:support-v4:24.0.0' }

i have build tools 24.0.0 installed on system. can unable figure out problem , new android dev.

appreciated.

add

compile 'com.android.support:design:24.1.1'

to gradle file. should work. part of design library. need add 1 access coordinatorlayout.


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