Error with android.support.v4 library

Question

I'm trying to use the Android Skype SDK sample code in my project and I'm getting loads of errors saying android.support.v4 not found.
The android-support-v4.jar file is already in my libs folder.
I've followed other articles and tried to remove and add again but no success. Can anyone help me here please?

My gradle file

apply plugin: 'com.android.application'

def ROOTDIR     = file("..").absolutePath

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    useLibrary 'org.apache.http.legacy'


defaultConfig {
    applicationId "it.moondroid.chatbot"
    minSdkVersion 17
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
    multiDexEnabled true

    jackOptions {
      //  enabled true
    }
}

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_7
    targetCompatibility JavaVersion.VERSION_1_7
}



buildTypes {
    debug {
        minifyEnabled false
        debuggable true
        jniDebuggable true
    }

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

    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/MSFTSIG.RSA'
        exclude 'META-INF/BCKEY.DSA'
        exclude 'META-INF/BCKEY.SF'
        exclude 'META-INF/MSFTSIG.SF'
    }

    dexOptions {
        preDexLibraries=false
        jumboMode = true
        javaMaxHeapSize "4g"
    }
}

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

productFlavors {
}
}

dependencies {

compile 'com.android.support:multidex:1.0.1'
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile files('libs/sanmoku-0.0.5.jar')
compile files('libs/joda-time-2.1.jar')
compile(name: "libucmp", ext: 'aar')
compile(name: "platform", ext: 'aar')
compile(name: "injector", ext: 'aar')
compile(name: "SkypeForBusiness", ext: 'aar')
compile(name: "ucmp-enums", ext: 'aar')
compile(name: "TelemetryClient2", ext: 'aar')
compile(name: "TelemetryService", ext: 'aar')
compile(name: "android-database-sqlcipher", ext: 'aar')
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.android.support:design:23.1.1'
compile 'com.android.support:recyclerview-v7:23.0.1'
compile 'com.android.support:cardview-v7:23.0.1'
compile 'com.android.support:support-v4:23.0.1'
}

Errors:

Information:Gradle tasks [:app:assembleDebug]
:app:preBuild UP-TO-DATE
:app:preDebugBuild UP-TO-DATE
:app:checkDebugManifest
:app:preDexOptionsBuild UP-TO-DATE
:app:prePackagingOptionsBuild UP-TO-DATE
:app:preReleaseBuild UP-TO-DATE
:app:prepareAndroidDatabaseSqlcipherLibrary UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72311Library UP-TO-DATE
:app:prepareComAndroidSupportCardviewV72301Library UP-TO-DATE
:app:prepareComAndroidSupportDesign2311Library UP-TO-DATE
:app:prepareComAndroidSupportMultidex101Library UP-TO-DATE
:app:prepareComAndroidSupportRecyclerviewV72311Library UP-TO-DATE
:app:prepareInjectorLibrary UP-TO-DATE
:app:prepareLibucmpLibrary UP-TO-DATE
:app:preparePlatformLibrary UP-TO-DATE
:app:prepareSkypeForBusinessLibrary UP-TO-DATE
:app:prepareTelemetryClient2Library UP-TO-DATE
:app:prepareTelemetryServiceLibrary UP-TO-DATE
:app:prepareUcmpEnumsLibrary UP-TO-DATE
:app:prepareDebugDependencies
:app:compileDebugAidl UP-TO-DATE
:app:compileDebugRenderscript UP-TO-DATE
:app:generateDebugBuildConfig UP-TO-DATE
:app:mergeDebugShaders UP-TO-DATE
:app:compileDebugShaders UP-TO-DATE
:app:generateDebugAssets UP-TO-DATE
:app:mergeDebugAssets UP-TO-DATE
:app:generateDebugResValues UP-TO-DATE
:app:generateDebugResources UP-TO-DATE
:app:mergeDebugResources UP-TO-DATE
:app:processDebugManifest UP-TO-DATE
:app:processDebugResources UP-TO-DATE
:app:generateDebugSources UP-TO-DATE
:app:incrementalDebugJavaCompilationSafeguard UP-TO-DATE
:app:compileDebugJavaWithJavac
:app:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.).
/Users/Anish/Desktop/BTBank/app/src/main/java/it/moondroid/chatbot/ConversationsActivity.java
Error:(26, 8) error: cannot access SupportParentable
class file for android.support.v4.app.TaskStackBuilder$SupportParentable not found
Error:(271, 13) error: cannot access DrawerLayout
class file for android.support.v4.widget.DrawerLayout not found
/Users/Anish/Desktop/BTBank/app/src/main/java/it/moondroid/chatbot/ChatAdapter.java
Error:(27, 8) error: cannot access NestedScrollingChild
class file for android.support.v4.view.NestedScrollingChild not found
Error:(27, 55) error: type argument ChatItemPresenter is not within bounds of type-variable VH
where VH is a type-variable:
VH extends ViewHolder declared in class Adapter
Error:(42, 9) error: cannot find symbol variable this
Error:(43, 9) error: cannot find symbol variable this
Error:(44, 9) error: cannot find symbol variable this
Error:(44, 58) error: cannot find symbol variable this
Error:(45, 13) error: package this does not exist
Error:(64, 5) error: method does not override or implement a method from a supertype
Error:(70, 48) error: cannot find symbol variable this
Error:(82, 5) error: method does not override or implement a method from a supertype
Error:(94, 53) error: package this does not exist
Error:(146, 9) error: cannot find symbol variable this
Error:(154, 5) error: method does not override or implement a method from a supertype
Error:(156, 20) error: package this does not exist
/Users/Anish/Desktop/BTBank/app/src/main/java/it/moondroid/chatbot/ChatItemPresenter.java
Error:(20, 8) error: cannot access ScrollingView
class file for android.support.v4.view.ScrollingView not found
Error:(33, 9) error: cannot find symbol variable this
Error:(34, 9) error: cannot find symbol variable this
Error:(35, 9) error: cannot find symbol variable this
Error:(35, 39) error: an enclosing instance that contains ChatItemPresenter.ChatItemPropertyChangeListener is required
Error:(35, 74) error: cannot find symbol variable this
Error:(39, 16) error: cannot find symbol variable this
Error:(47, 56) error: package this does not exist
Error:(57, 52) error: package this does not exist
Error:(62, 60) error: package this does not exist
Error:(72, 16) error: cannot find symbol variable this
/Users/Anish/Desktop/BTBank/app/src/main/java/it/moondroid/chatbot/ChatFragment.java
Error:(98, 37) error: incompatible types: ChatAdapter cannot be converted to Adapter
:app:compileDebugJavaWithJavac FAILED
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
Information:BUILD FAILED
Information:Total time: 4.785 secs
Information:29 errors
Information:0 warnings
Information:See complete output in console

Answer 1

i'm getting loads of errors saying android.support.v4 not found.

Looks like you excluding compiling it.

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

Try removing that block.

The android-support-v4.jar file is already in my libs folder

You don't need a jar file, these lines (yes, all three) each include the support-v4 library.

compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.android.support:design:23.1.1'
compile 'com.android.support:support-v4:23.0.1'

Really, though, you only need the design one. You can remove the other two. If you keep them, you have to make the version numbers the same, though.

One more thing - When you have compile fileTree(dir: 'libs', include: ['*.jar']), you do not need to use any lines containing compile files('libs/blah.jar') because the first way already grabs all the jar files.