Android Studio does not detect compilation support libraries

Question

Since Android Studio will be used by default for the IDE for Android Development, I decided to transfer my existing project to Android-studio. The structure of the project looks different, and the folder hierarchy in my project is as follows:

Complete Project
 ->.idea
 -> build
 -> Facebook SDK
 -> MainProject
 -> ... (Other Libraries)
 build.gradle
 local.properties
 settings.gradle
 ...
External Libraries
 -> Android API 8 Platform
 -> Android API 18 Platform
 -> Android API 19 Platform
 -> 1.7 Java
 -> support-v4-19.1.0

My MainProject has a libs folder that contains various banks used in the project. Surprisingly it does not contain the android-support-v4 jar that was present in my eclipse project. Thus, it seems that the external library folder in the root folder should take care of this.

But after importing, when I tried to compile the project, I started throwing a "Symbol not found error" for some classes related to the Android support library.

: Android Studio NotificaitonCompat android.support.v4.app.NotificationCompat, ,

: (17, 30) : NotificationCompat : ': app: compileDebugJava'. > ; . .

. build.gradle MainProject, .

, .

EDIT: Gradle

build.gradle MainProject

apply plugin: 'com.android.application'

android {
compileSdkVersion 19
buildToolsVersion "21.1.2"

defaultConfig {
    applicationId "package.app"
    minSdkVersion 8
    targetSdkVersion 19
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
    }
}
}

configurations {
all*.exclude group: 'com.android.support', module: 'support-v4'
}

dependencies {
compile project(':facebookSDK')
compile project(':library')
compile project(':volley')
compile 'com.google.android.gms:play-services:+'
compile 'com.actionbarsherlock:actionbarsherlock:4.4.0@aar'
compile 'com.android.support:support-v4:19.1.0'
compile files('libs/FlurryAnalytics_3.3.3.jar')
compile files('libs/universal-image-loader-1.8.4.jar')
....
}

Answer 1

:

configurations {
all*.exclude group: 'com.android.support', module: 'support-v4'
}

-v4, . .

, :

compile 'com.android.support:support-v4:19.1.0'

jar libs , , - , , , , , dex.

Answer 2

jar 'libs', build.gradle:

dependencies{
    compile fileTree(dir: 'libs', include: ['*.jar']
    compile 'com.android.support:support-v4:21.0.3'  //to automatically add up-to-date support lib
}

, !