The designView of my content_main.xml is not displayed

Question

even i resynced the gradle,i still cant see the design view.it happens with all projects,Even i started a totaly new project and it has the same problem

picture of Errors :

Errors: 1)Render problem: failed to find style 'coordinateLayoutStyle' in current theme.

2)Using private resources: The resources @string/appbar_scrolling_view_behaviour is marked as private in com.android.support.design .

3) Missing styles: Missing styles, is the correct theme chosen for this layout?

4) Failed to instantiate one or more classes: The following classes could not be instantiated: -android.support.design.widget.CoordinatorLayout -android.support.design.widget.AppbarLayout

Answer 1

I figured it out,Actually there is a problem with SDK 28.

Solution: Use SDK version 27 ie in your " build.gradle(Module:app) " and change

compileSdkVersion 28
targetSdkVersion 28

TO:

compileSdkVersion 27
targetSdkVersion 27

Also use these Dependencies versions:

implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support:design:27.1.1'

This will solve the issue,but it will still show an
Rendering Problem:Failed to find style 'coordinatorLayoutStyle' in current theme To solve this issue write this into application theme

<style name="Apptheme.NoActionBar">
<item name="coordinatorLayoutStyle">@style/Widget.Design.CoordinatorLayout</item>
</style>

Hope so that will help you!