Android Studio: No build variant found error

Question

i am new to android development, i started developing from scratch on a project i bought online, following the documentation, i encountered a error saying No variants found for 'app'. Check build files to ensure at least one variant exists.

Here is the build.gradle code

apply plugin: 'com.android.application'

android {
compileSdkVersion 29
buildToolsVersion "29.0.1"
defaultConfig {
    applicationId "com.app-10.app"
    minSdkVersion 23
    targetSdkVersion 29
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'androidx.appcompat:appcompat:1.0.2'
implementation 'com.google.android.material:material:1.0.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.vectordrawable:vectordrawable:1.0.1'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test:runner:1.2.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
// Third Party Libraries
//Glide library for image fetching from the web
implementation 'com.github.bumptech.glide:glide:4.9.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.9.0'
//Material library for styling blocks
implementation 'com.google.android.material:material:1.0.0'
// Google Gson
implementation 'com.google.code.gson:gson:2.8.5'
// Retrofit
implementation 'com.squareup.retrofit2:retrofit:2.6.1'
implementation 'com.squareup.retrofit2:converter-gson:2.6.1'
// Android-SpinKit
implementation 'com.github.ybq:Android-SpinKit:1.4.0'

implementation files('libs/YouTubeAndroidPlayerApi.jar')

// gotev/android-upload-service
implementation "net.gotev:uploadservice:3.5.2"

//A fast circular ImageView perfect for profile images
implementation 'de.hdodenhof:circleimageview:3.0.1'

implementation 'org.apache.commons:commons-io:1.3.2'

}

Answer 1

I have just solved the same issue like this:

Tools -> SDK Manager

Verify that the SDK platform package for Android 10.0 (the one with API level 29, like you defined in your gradle file) is checked. If not, check it and apply changes. Accept the licence terms, install the package and then File -> Sync Project with Gradle Files (or open the project again)