Failed to load AppCompat ActionBar with unknown error?

Question

build.gradle file

    apply plugin: \'com.android.application\'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId \"io.d         


        

Answer 1

I fix this error using 3 methods on YouTube

Answer 2

Set your target sdk version to 27 . Set your compile sdk version to 27 . And app compat version from 28.0.0-alpha3 to 27.1.1 .

If you still want to use sdk version 28

Just replace alpha3 to alpha1 without changing anything else

Answer 3

This worked for me when that happened, I dont know why it doesn't work with 28:

//use this instead 
compileSdkVersion 27
buildToolsVersion '27.0.3'
targetSdkVersion 27

dependencies{

//switch to these
implementation 'com.android.support:appcompat-v7:27.0.0-alpha'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:design:27.0.0'

}

Answer 4

This worked for me.

Open, res --> values --> styles.xml, here you will find a line like this:

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

change it to:

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">

In otherwords, change DarkActionBar to NoActionBar

Answer 5

I had the same problem. Seems it is a Android Studio bug.

In your styles xml-file change this:

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

to this:

<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">

Works for me.