                        課程
                    
                        /移動開發
                        
                            /Android
                        
                        /多種多樣的App主界面Tab實現方法

Error: Program type already present: android.support.v4.app.ActivityCompat

dependencies?{
????implementation?fileTree(include:?['*.jar'],?dir:?'libs')
????implementation?'com.android.support:appcompat-v7:28.0.0'
????//????testImplementation?'junit:junit:4.12'
????implementation?'com.android.support.constraint:constraint-layout:1.1.3'
????implementation?'com.android.support:design:28.0.0'
????androidTestImplementation?'com.android.support.test:runner:1.0.2'
????androidTestImplementation?'com.android.support.test.espresso:espresso-core:3.0.2'
????implementation?'com.blankj:utilcode:1.22.10'
????implementation?'com.inkapplications.viewpageindicator:library:2.4.3'
}