Eclipse can't render Android layout - android

Eclipse gives the following error when I try to add "android.support.v7.widget.Toolbar"
The following classes could not be instantiated:
- android.support.v7.widget.Toolbar (Open Class, Show Error Log) See the Error
Log (Window > Show View) for more details.
Layout rendering error

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Exception raised during rendering in Eclipse

I have an error in Android xml layout as follows :
Exception raised during rendering: <include /> can only be used inside of a ViewGroup
Exception details are logged in Window > Show View > Error Log
The following classes could not be found:
- android.support.v7.internal.widget.ActionBarOverlayLayout (Fix Build Path, Edit XML, Create Class)
Now, When I am changing the AppTheme to Theme.Holo than its working fine.
I want to know that Why is it like this ?

Android XML layout NullPointerException

java.lang.NullPointerException Exception details are logged in Window > Show View > Error Log
The following classes could not be instantiated:
- android.support.v7.internal.app.WindowDecorActionBar (Open Class, Show Error Log)
- android.support.v7.internal.widget.ActionBarContextView (Open Class, Show Error Log)
- android.support.v7.widget.Toolbar (Open Class, Show Error Log)
See the Error Log (Window > Show View) for more details.

Go to File > Invalidate Caches/Restart. This should help your IDE restore the cache since this is just an issue with the renderer. Worked for me for the same exception.

The following classes could not be instantiated: - android.inputmethodservice.KeyboardView

I was trying to set a keyboard view but the following error occurred
"The following classes could not be instantiated:
- android.inputmethodservice.KeyboardView (Open Class, Show Error Log)"
I am using this version
Build: v22.6.2-1085508

the following class could not be instantiated?

i was trying to integrate google +1 option in my app.
i imported google play services library in ma app and i did all previous steps like enabling g+ api xml .When i try to add google plus button in xml file,i am getting following error
The following classes could not be instantiated:
- com.google.android.gms.plus.PlusOneButton (Open Class, Show Error Log)
See the Error Log (Window > Show View) for more details.

I had same problem with TitlePageIndicator.
My reason - wrong class definition in manifest. (Copy/past error during update project).

Android graphical layout representation error?

java.lang.NullPointerException
Exception details are logged in Window > Show View > Error Log
The following classes could not be found:
- RelativeLayout (Change to android.widget.RelativeLayout, Fix Build Path, Edit XML)

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