android - Gettting error while adding Facebook SDK in build.gradle -


i working on project need implement facebook login. purpose followed steps developer website mentioned. unfortunately getting build error after adding'com.facebook.android:facebook-android-sdk:4.1.0' in build.gradleas follows

apply plugin: 'com.android.application'  android {     compilesdkversion 22     buildtoolsversion "22.0.1"      defaultconfig {         applicationid "com.example.facebook"         minsdkversion 11         targetsdkversion 22         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     } } repositories {     mavencentral() } dependencies {     compile 'com.android.support:appcompat-v7:22.2.0'     compile 'com.facebook.android:facebook-android-sdk:4.1.0' }

error log getting:

error:a problem occurred configuring project ':app'.  > not resolve dependencies configuration ':app:_debugcompile'. > not resolve com.facebook.android:facebook-android-sdk:4.1.0.       required by: exampleapp:app:unspecified  > no cached version of com.facebook.android:facebook-android-sdk:4.1.0 available offline mode. > no cached version of com.facebook.android:facebook-android-sdk:4.1.0 available offline mode.

please me resolve issue facing right couple of days. helpless , stuck solutions. kind of suggestions useful fix issue. in advance

your log gives answer:

no cached version of com.facebook.android:facebook-android-sdk:4.1.0 available offline mode.

gradle in offline mode, cannot download new version of library. go preferences > build, execution, deployment > build tools > gradle , disable "offline work".

preferences can accessed here:
enter image description here


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