No resource found - Theme.AppCompat.Light.DarkActionBar
AppCompat is a library project. You need to reference the library project in your android project.
Check the topic Adding libraries with resources.
Update
Adding material theme should be the way. Check https://material.io/develop/android/docs/getting-started for more details.
If you're using Eclipse, then add the reference library into your project as the following steps:
- Right-click your project in the
Project ExplorerView. - Click
Properties. - Click
Androidin thePropertieswindow. - In the
Librarygroup, clickAdd...- See the image below.
- Select the library. Click
OK. - Click the
OKbutton again in the Properties window.
If you are using Android Studio then just add the dependency
dependencies { implementation 'com.android.support:appcompat-v7:25.0.1'}to app/build.gradle. And that will work