[Android Studio][Error] layout_behavior not found.

[Android Studio][Error] layout_behavior not found.

Error log : Error:error: attribute 'com.example.chat.chatapplication:layout_behavior' not found.

log 가 뜨면서 resource xml 파일이 열리지 않는 경우

---> build.gradle 에서 dependency 에 support:design 추가

기본 셋팅 Gradle

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// Top-level build file where you can add configuration options common to all sub-projects/modules.   buildscript {          repositories {         google()         jcenter()           maven {     url "https://maven.google.com"       }     }     dependencies {         classpath 'com.android.tools.build:gradle:3.0.1'           // NOTE: Do not place your application dependencies here; they belong         // in the individual module build.gradle files     } }   allprojects {     repositories {         google()         jcenter()     } }   task clean(type: Delete) {     delete rootProject.buildDir }

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apply plugin: 'com.android.application'   android {     compileSdkVersion 26       defaultConfig {           applicationId "com.example.chat.chatapplication"         minSdkVersion 24         targetSdkVersion 26         versionCode 1         versionName "1.0"         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"     }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     } }   dependencies {     implementation fileTree(dir: 'libs', include: ['*.jar'])     implementation 'com.android.support:appcompat-v7:26.1.0'     implementation 'com.android.support.constraint:constraint-layout:1.0.2'     testImplementation 'junit:junit:4.12'     androidTestImplementation 'com.android.support.test:runner:1.0.1'     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1' } Colored by Color Scripter

cs

apply plugin: 'com.android.application'
 
android {
    compileSdkVersion 26
 
    defaultConfig {
 
        applicationId "com.example.chat.chatapplication"
        minSdkVersion 24
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}
 
dependencies {
    implementation 'com.android.support:design:26.1.0'
 
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}