error can not resolve symbol TabLayout and 'design

问题

Please help: I got error when import android.support.design.widget.TabLayout It say "can not resolve symbol 'design'

My build.gradle:

     compileSdkVersion 26
     buildToolsVersion "26.0.0"

     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 'com.android.support:appcompat-v7:26'
         compile 'com.android.support.constraint:constraint-layout:1.0.2'
         compile 'com.android.support:support-v4:26'
         testCompile 'junit:junit:4.12'
     }

回答1:

You forgot to add design support library. Just add this dependencies in your gradle app file:

implementation 'com.android.support:design:26.0.+'

Design Support Library

The Design package provides APIs to support adding material design components and patterns to your apps.

The Design Support library adds support for various material design components and patterns for app developers to build upon, such as navigation drawers, floating action buttons (FAB), snackbars, and TabLayout.

Or AndroidX dependency:

implementation "com.google.android.material:material:1.0.0"

回答2:

UPDATE:

With Androidx and the Material Components library use:

implementation 'com.google.android.material:material:1.0.0'

OLD (Support Libraries):

As you can check in the doc if you want to use the TabLayout you have to add this dependency:

com.android.support:design:26.0.2

Add in your build.gradle in the dependencies block:

compile 'com.android.support:design:26.0.2'

回答3:

This happened to me when migrating to androidx. You have to add this to your gradle file:

implementation 'com.google.android.material:material:1.1.0-alpha09'

Also, the location of the TabLayout has changed. From

android.support.design.widget.TabLayout

to

com.google.android.material.tabs.TabLayout

Here are the class mappings for androidx. Here is the new documentation for the TabLayout.

来源：https://stackoverflow.com/questions/46194684/error-can-not-resolve-symbol-tablayout-and-design