activity_main.xml: Failed to find the style corresponding to the id 2130771996

Try changing to lower version as shown in image below and it should work:

I found it i had same problem go to values/styles.xml change theme to Base.Theme.AppCompat.Light.DarkActionBar or anything you want

Before :

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
    </style>
</resources>

After :

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme parent="Base.Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
    </style>
</resources>

I did a configure build path including the andriod 5.1.1 library and then did a restart of eclipse and this error got resolved