Problem Description:

Rendering Problems 

       The following classes could not be found: –  android.support .v7. internal.app.WindowDecorActionBar (Fix Build Path, Create Class)

       Tip: Try to build the project.

Attached:

When you encounter problems in your study, you should follow the warning of your predecessors that “if you don’t know, check yourself first, but if you really can’t, then look for your predecessors”. The quickest way to check is to go online. This article will be one of your network experiences.

Tools / raw materials

Android Studio

Cause of the problem

one

For Android version upgrade, actionbar is not recommended and will be replaced by toolbar.

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Solution 1: parent=“ Base.Theme.AppCompat . Light.DarkActionBar ”

one

Find the project directory RES / values/ sttyles.xml , ready to modify the apptheme settings.



two

Property parent found=“ Theme.AppCompat.Light .DarkActionBar”



three

Change to parent=“ Base.Theme.AppCompat . Light.DarkActionBar “, that is, the prefix” base. “Is added to the original parent attribute value.



four

Save the changes and go back to the question prompt. Is it not available now?



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Solution 2: parent=“ Theme.AppCompat.Light .NoActionBar”

one

Also in styles.xml File, modify the value of the parent property to“ Theme.AppCompat.Light .NoActionBar”



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Solution 3: change to a lower version of the API

one

On the question prompt page, find the API selection button in the upper right corner to see the list of optional APIs. Choose a lower version, such as 4.2.2



two

After the API switch is successful, you can see that the problem is no longer displayed.

However, this method is not recommended.



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matters needing attention

It is recommended to use toolbar instead of actionbar