Gradle error when trying to import the lib

[adamvarhegyi]

C:\a_projects\flexi-register\app\build.gradle
    Error:Error:Failed to resolve: com.android.support:appcompat-v7:26.0.2
<a href="install.m2.repo">Install Repository and sync project</a><br><a href="openFile:C:/a_projects/flexi-register/app/build.gradle">Open File</a><br><a href="open.dependency.in.project.structure">Show in Project Structure dialog</a>
    Error:Error:Failed to resolve: annotationProcessor
<a href="openFile:C:/a_projects/flexi-register/app/build.gradle">Open File</a>
    Error:Error:Failed to resolve: com.android.support:support-annotations:26.0.2
<a href="install.m2.repo">Install Repository and sync project</a><br><a href="openFile:C:/a_projects/flexi-register/app/build.gradle">Open File</a><br><a href="open.dependency.in.project.structure">Show in Project Structure dialog</a>

I have installed v7:26.0.2, still not works.

Any advice?

Gradle dependencies:

dependencies {

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

    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })

    compile 'me.zhanghai.android.materialprogressbar:library:1.4.2'

    compile 'com.jakewharton:butterknife:8.8.1'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

    compile 'com.amitshekhar.android:android-networking:1.0.0'

    compile 'com.android.support:appcompat-v7:26.+'
    compile 'com.android.support:support-v4:26.+'
    compile 'com.android.support:support-vector-drawable:26.+'
    testCompile 'junit:junit:4.12'
}

[zhanghai]

What do you mean by "installed v7:26.0.2"? Support libraries >= 26.0.0 has the following release note:

The support libraries are now available through Google's Maven repository. You do not need to download the support repository from the SDK Manager. For more information, see Support Library Setup.

[zhanghai]

Closing due to inactivity.