android.support.design.widget.TabLayout - 无法解析符号“设计”

Question

I tried to import android.support.design.widget.TabLayout, but I got cannot resolve symbol 'design' error.

In the First I sought that is a problem with a implementation com.android.support:design version (in gradle Module). But it is not. I managed to find the cause of this error - dependencies versions (in gradle Project).

My dependencies version is:

classpath 'com.android.tools.build:gradle:4.0.0'
classpath 'com.google.gms:google-services:4.3.3

'

So if I use older version - this is fixing the error.

classpath 'com.android.tools.build:gradle:3.1.3'
classpath 'com.google.gms:google-services:3.2.1'

I do not understand why It does not work with newest versions. Please help me understand this, why I cannot use new versions.

My android studio vesrion is: 4.0

gradle Module:

android {
compileSdkVersion 29
buildToolsVersion "29.0.3"

defaultConfig {
    applicationId "mv.group.qwerty"
    minSdkVersion 23
    targetSdkVersion 29
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
   

buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } }

gradle Project:

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.0.0'
        classpath 'com.google.gms:google-services:4.3.3'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url 'https://maven.google.com'
        }
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}

Answer 1

Solution 1: add this to your build.gradle(Module:App) dependencies,

implementation 'com.android.support:design:28.0.0-alpha3'.

Also Make sure that all Android Support dependencies have the same version like below:

dependencies {
   implementation fileTree(dir: 'libs', include: ['*.jar'])
   implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'
   implementation "com.android.support:cardview-v7:28.0.0-alpha3"
   implementation 'com.android.support:recyclerview-v7:28.0.0-alpha3'
   implementation 'com.android.support:design:28.0.0-alpha3'

}

Solution 2:

Did you convert your dependencies to androidx ? In Menu, press Refector and select Migrate to AndroidX , press sync gradle and it should solve this issue. and use implementation 'com.google.android.material:material:1.0.0' instead of implementation 'com.android.support:design:28.0.0-alpha3'