appcombat_v7 won't build, so I can't build my project

Question

Truly been going through a nightmare trying to work with an android project w/ Facebook. The nightmare is it worked, then i must have touched one of my XMLs and now Eclipse REALLY has **** the bed. I can't run anything.

So I've narrowed it down a bit. My project has the dreaded lack of an R file. Cleaning does nothing. When I try to add import of com.example.packagename.R it doesn't know what I'm talking about. When I try to run my project:

[2014-11-21 16:58:56 - DiabetesMadeEasy] All versions of the libraries must be the same at this time.
[2014-11-21 16:58:56 - DiabetesMadeEasy] Versions found are:
[2014-11-21 16:58:56 - DiabetesMadeEasy] Path:    C:\Users\Phil\workspace\appcompat_v7\libs\android-support-v4.jar
[2014-11-21 16:58:56 - DiabetesMadeEasy]    Length: 995386
[2014-11-21 16:58:56 - DiabetesMadeEasy]    SHA-1: a13f8fe2c278737e2f0b6fcf00f6b2ae4034aacf
[2014-11-21 16:58:56 - DiabetesMadeEasy] Path: C:\Users\Phil\Desktop\facebook-android-sdk-3.20.0 (1)\facebook-android-sdk-3.20.0\facebook\libs\android-support-v4.jar
[2014-11-21 16:58:56 - DiabetesMadeEasy]    Length: 758727
[2014-11-21 16:58:56 - DiabetesMadeEasy]    SHA-1: efec67655f6db90757faa37201efcee2a9ec3507
[2014-11-21 16:58:56 - DiabetesMadeEasy] Jar mismatch! Fix your dependencies
[2014-11-21 16:58:56 - DiabetesMadeEasy] Found 2 versions of android-support-v4.jar in the dependency list,
[2014-11-21 16:58:56 - DiabetesMadeEasy] but not all the versions are identical (check is based on SHA-1 only at this time).
[2014-11-21 16:58:56 - DiabetesMadeEasy] All versions of the libraries must be the same at this time.
[2014-11-21 16:58:56 - DiabetesMadeEasy] Versions found are:
[2014-11-21 16:58:56 - DiabetesMadeEasy] Path: C:\Users\Phil\workspace\appcompat_v7\libs\android-support-v4.jar
[2014-11-21 16:58:56 - DiabetesMadeEasy]    Length: 995386
[2014-11-21 16:58:56 - DiabetesMadeEasy]    SHA-1: a13f8fe2c278737e2f0b6fcf00f6b2ae4034aacf
[2014-11-21 16:58:56 - DiabetesMadeEasy] Path: C:\Users\Phil\Desktop\facebook-android-sdk-3.20.0 (1)\facebook-android-sdk-3.20.0\facebook\libs\android-support-v4.jar
[2014-11-21 16:58:56 - DiabetesMadeEasy]    Length: 758727
[2014-11-21 16:58:56 - DiabetesMadeEasy]    SHA-1: efec67655f6db90757faa37201efcee2a9ec3507
[2014-11-21 16:58:56 - DiabetesMadeEasy] Jar mismatch! Fix your dependencies
[2014-11-21 16:59:04 - DiabetesMadeEasy] Found 2 versions of android-support-v4.jar in the dependency list,
[2014-11-21 16:59:04 - DiabetesMadeEasy] but not all the versions are identical (check is based on SHA-1 only at this time).
[2014-11-21 16:59:04 - DiabetesMadeEasy] All versions of the libraries must be the same at this time.
[2014-11-21 16:59:04 - DiabetesMadeEasy] Versions found are:
[2014-11-21 16:59:04 - DiabetesMadeEasy] Path: C:\Users\Phil\workspace\appcompat_v7\libs\android-support-v4.jar
[2014-11-21 16:59:04 - DiabetesMadeEasy]    Length: 995386
[2014-11-21 16:59:04 - DiabetesMadeEasy]    SHA-1: a13f8fe2c278737e2f0b6fcf00f6b2ae4034aacf
[2014-11-21 16:59:04 - DiabetesMadeEasy] Path: C:\Users\Phil\Desktop\facebook-android-sdk-3.20.0 (1)\facebook-android-sdk-3.20.0\facebook\libs\android-support-v4.jar
[2014-11-21 16:59:04 - DiabetesMadeEasy]    Length: 758727
[2014-11-21 16:59:04 - DiabetesMadeEasy]    SHA-1: efec67655f6db90757faa37201efcee2a9ec3507
[2014-11-21 16:59:04 - DiabetesMadeEasy] Jar mismatch! Fix your dependencies

Then a million errors referring to these jars. I do not know how to fix these jars. I fear I will never fix them. I want to download another editor and start from scratch but I'm not sure if this is recoverable or not.

When i try to build appcombat_v7 it will not build. I get an obscure error in 1 of the files it need. res/values/values-large-v14/themes_base.xml. Some resource that can't be found.

How do I fix these jars? I'm in Eclipse... does Android studio similarly explode every now and again?

Answer 1

Found 2 versions of android-support-v4.jar in the dependency list

You need to use the same android-support-v4.jar library in your project and all of its dependencies. try copying it from your project's lib folder and pasting it to the libraries you're using.