CODEWITHSUNDEEP
androidsdklayout-editorandroid-appcompat
jjordan
jjordan

Reputation: 11

Issues with AppCompat in Android Studio Affecting Layout Editor

So I just installed Android Studio and started following the "Build your first app" Guide on Android's Developer Site. I followed there guide by creating a simple, empty app, with nothing but "Hello World" text in the middle of the screen.

While running the app on the emulator it works fine, but when I look at the Blueprint in the Layout Editor, it is empty. It should show the "Hello World" TextView in the center as well as the show the constraints.

I get these messages below:

`Render Problem

Failed to load AppCompat ActionBar with unknown error.   
Tip: Try to refresh the layout.`

...AND

Failed to Instantiate One or More Classes

The following classes could not be instantiated:
- android.support.v7.widget.ActionBarContainer (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.ActionBarContextView (Open Class, Show Exception, Clear Cache)
- android.support.v7.app.WindowDecorActionBar (Open Class, Show Exception, Clear Cache)
 Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the IDE.  
If this is an unexpected error you can also try to build the project, then manually refresh the layout.  E
xception Details java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener

So I've read that it might have something to do with the appcompat version, and I see that there is a version in my build.gradle file that looks like this: implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'

And that I should look at the appcompat-v7 folder in my sdk folder, and see which is the highest version I have in there. -It's version 26.0.0-alpha1

So would the solution be to place a folder with 28.0.0-alpha3 in my appcompat-v7 folder within my SDK dierctory? And where would I get that?

Can someone let me know if I understand what the problem is here...

The appcompat version in the build.gradle file that the app will be built with, differs from the verion the SDK is using to display the app in the Layout Editor?

Thanks

Upvotes: 0

Views: 181

Answers (1)

Mohammedis271
Mohammedis271

Reputation: 185

In your Gradle Module: App 

android {
    compileSdkVersion 23
    buildToolsVersion '25.0.0'
    defaultConfig {
        applicationId "com.example.zumoappname"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }

compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.android.support.constraint:constraint-layout:1.1.2'

you will see something similar to this, the number by compileSdkVersion 23 must correspond with the number by 'com.android.support:appcompat-v7:23.4.0' so as you can see in this example i used 23

Upvotes: 0

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