Theme.AppCompat.Light.DarkActionBar - No resource found

In "android-support-v7-appcompat" project:

• Delete “android-support-v7-appcompat” from Package explorer.
• Import again and check “Copy into workspace”
• In Properties -> Android -> in Project build target, uncheck Android 2.2 and check Android 4.1.2
• In Java build path, uncheck if you have any .jar library, and uncheck the Dependences

In other hand, the project that uses “android-support-v7-appcompat”:

• In Properties -> Android add the library, but uncheck "IsLibrary”.
• In Android -> Project build tarjet check Android 4.0.
• In "Java Build Path" -> Order and Export -> Unchecked the .jar library
• Finally do a “Project -> Clean” both projects

If you are using Gradle, then you have a problem with the latest version of the compatibility library.

If you have the following in your build.gradle file with a '+' at the end:

dependencies {
    compile 'com.android.support:appcompat-v7:+'
}

then it may be grabbing a later version of the library than you want.

Changing the dependency to:

dependencies {
    compile 'com.android.support:appcompat-v7:18.0+'
}

may fix your problem.