upgrade 2020

[MarcoBravoG]

Hi upgrade

I updated with the 2020 version of android

build gradle

apply plugin: 'com.android.application'

android {
compileSdkVersion 29
buildToolsVersion "24.0.3"
defaultConfig {
applicationId "com.androidtutorialshub.countdowntimer"
minSdkVersion 21
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'
}
}
}
apply plugin: 'com.android.application'
dependencies {
implementation fileTree(dir: 'libs', include: ['.jar'])
/
androidTestImplementation('com.android.support.test.espresso:espresso-core:3.2.0', {
exclude group: 'com.android.support', module: 'support-annotations'
})

*/
implementation 'androidx.appcompat:appcompat:1.1.0'

implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

// implementation 'com.android.support:design:29.0.0'
}

////////////////////////////////////////////////////////////////////////////////
in gradle.properties

android.useAndroidX=true

and build gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
repositories {
jcenter()
google()
}
dependencies {
classpath 'com.android.tools.build:gradle:4.0.1'

    // 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
}

////////////////////////////////////////////////////////////////////////////////

in Main Activity

import androidx.appcompat.app.AppCompatActivity;