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change dependencies to
..dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
testImplementation 'junit:junit:4.12'
//noinspection GradleCompatible
implementation "com.android.support:support-v4:23.1.1"
//noinspection GradleCompatible
implementation "com.android.support:appcompat-v7:23.1.1"
implementation "com.android.support:support-annotations:28.0.0"
and in build.gradle(project UD839.....) file
in the repositories make changes like following
repositories {
jcenter()
maven { url '
https://maven.google.com
' }
that's all . if it does not work you can always undo it. all the best.
