```
apply plugin: 'com.android.application'

android {

    compileSdkVersion 22

 buildToolsVersion '22.0.1'

 defaultConfig {

 applicationId "com.ipoc.wipro.com.socialapp"

        minSdkVersion 15

        targetSdkVersion 22

        versionCode 1

        versionName "1.0"

        multiDexEnabled true
    }

 buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

    productFlavors {

    }

}

dependencies {

    provided fileTree(dir: 'libs', include: ['*.jar'])

    //'com.android.support:support-v4:23.4.0'

    //'com.android.support:appcompat-v7:23.4.0'

    //'com.android.support:design:23.4.0'

 testCompile 'junit:junit:4.12'

 compile 'com.google.android.gms:play-services-maps:9.2.1'

    compile 'com.google.android.gms:play-services-location:9.0.2'
    compile 'com.android.support:support-v4:22.0.0'
    compile 'com.android.support:appcompat-v7:22.0.0'
    compile 'com.android.support:multidex:1.0.0'
    compile 'com.android.support:design:22.0.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha4'
    compile 'com.google.android.gms:play-services:9.2.1'
    compile 'com.google.android.gms:play-services-ads:9.2.1'
    compile 'com.google.android.gms:play-services-auth:9.2.1'
    compile`enter code here` 'com.google.android.gms:play-services-gcm:9.2.1'

}

```

Error:(35, 13) Failed to resolve: com.android.support.constraint:constraint-layout:1.0.0-alpha4
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