Gradle Failed to resolve: commons-io:commons-io:+ - android-gradle-plugin

Question

When syncing Android project with gradle in android studio , it fails resolving
the packages shown in the screeshot below .
here's my build.gradle :
buildscript {
repositories {
maven { url 'https://maven.fabric.io/public' }
}
dependencies {
classpath 'io.fabric.tools:gradle:1.+'
}
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'
repositories {
maven { url 'https://maven.fabric.io/public' }
}
android {
compileSdkVersion 21
buildToolsVersion "22.0.1"
defaultConfig {
applicationId "com.dmbteam.cityguide"
minSdkVersion 10
targetSdkVersion 22
versionCode 4
versionName '4.0'
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
productFlavors {
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.0.0'
compile 'com.google.android.gms:play-services:7.3.0'
compile 'commons-io:commons-io:+'
compile 'com.android.support:recyclerview-v7:+'
compile 'com.android.support:cardview-v7:+'
compile 'com.j256.ormlite:ormlite-android:4.48'
compile('org.simpleframework:simple-xml:2.7.+') {
exclude module: 'stax'
exclude module: 'stax-api'
exclude module: 'xpp3'
exclude group: 'org.apache.commons', module: 'commons-io'
}
compile project(':pinterest_lib')
compile('com.crashlytics.sdk.android:crashlytics:2.4.0#aar') {
transitive = true;
}
compile 'com.google.android.gms:play-services-maps:7+'
compile 'com.google.android.gms:play-services-location:7+'
compile 'com.google.android.gms:play-services:7+'
}

Answer 1

under repositories, I usually find that I end up having to have a chain something like this:
repositories {
mavenLocal()
maven { url 'https://maven.fabric.io/public' }
jcenter()
}
In other words, it 1st tries to use your local maven repo, then the specific maven repo/mirror, and then falls back to jcenter as a last resort.