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Android Build a Simple Android App Creating the Screen Layout Getting to Know Our Tools

Premkumar Chandrashegaran
Premkumar Chandrashegaran
1,333 Points
Posted by Premkumar Chandrashegaran
Premkumar Chandrashegaran
1,333 Points

Rendering Problems in activity_fun_facts.xml tab

Hi,

My app is not displaying correctly when I open the layout tab. I have these messages appearing when I click on the .xml tab:

"The following classes could not be found: - android.support.v7.internal.app.WindowDecorActionBar (Fix Build Path, Create Class) Tip: Try to build the project. The following classes could not be instantiated: - 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 Exception Details java.lang.NullPointerException   at android.support.v7.app.WindowDecorActionBar.getDecorToolbar(WindowDecorActionBar.java:241)   at android.support.v7.app.WindowDecorActionBar.init(WindowDecorActionBar.java:198)   at android.support.v7.app.WindowDecorActionBar.<init>(WindowDecorActionBar.java:190)   at java.lang.reflect.Constructor.newInstance(Constructor.java:422)   at com.android.layoutlib.bridge.bars.AppCompatActionBar.<init>(AppCompatActionBar.java:89)   at com.android.layoutlib.bridge.impl.Layout.createActionBar(Layout.java:237)   at com.android.layoutlib.bridge.impl.Layout.<init>(Layout.java:151) Copy stack to clipboard Failed to find the style corresponding to the id 2147418311 (6 similar errors not shown) Failed to load AppCompat ActionBar with unknown error. (3 similar errors not shown)"

Thanks for your help!

Dylan Carter
Dylan Carter
4,780 Points
Dylan Carter
Dylan Carter
4,780 Points

the same thing is happening to me, did you download AS from there main website and not the treehouse package thing?

4 Answers

Dylan Carter
Dylan Carter
4,780 Points
Dylan Carter
Dylan Carter
4,780 Points

http://stackoverflow.com/questions/18195807/android-studio-rendering-problems

figured it out. do the first answer on here with like 341 votes. when you click on the indicated button, you probably have "pick what is best for me" selected, go below it and select API 21: Android 6.0.

Premkumar Chandrashegaran
Premkumar Chandrashegaran
1,333 Points
Premkumar Chandrashegaran
Premkumar Chandrashegaran
1,333 Points

I downloaded it from the Android Web. The more I do it, the more I understand. Sometimes, you just have to build it again. Anyways, thanks bud!

Sushant Bindra
Sushant Bindra
625 Points
Sushant Bindra
Sushant Bindra
625 Points

Thanks for the solution !

Aadi Kapur
Aadi Kapur
195 Points
Aadi Kapur
Aadi Kapur
195 Points

I changed the API to API 21 but now I don't see the action bar. Thanks!

sukjae lee
sukjae lee
5,705 Points
sukjae lee
sukjae lee
5,705 Points

its inside app > res > layout > activity_fun_facts.xml (in Android view)