相关疑难解决方法(0)

我com.android.dex.DexException: Multiple dex files define Lcom/google/android/gms/internal/zzau;运行我的应用程序时收到错误gradle文件是

app.gradle

dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:support-v4:21.0.3'
compile 'com.android.support:appcompat-v7:21.0.3'
compile 'com.android.support:recyclerview-v7:21.0.0'
compile 'com.android.support:cardview-v7:21.0.0'
compile 'com.google.android.gms:play-services:7.0.+'
compile 'com.android.support:mediarouter-v7:21.0.3'
compile 'com.squareup:otto:1.3.5'
compile 'com.squareup.picasso:picasso:2.3.4'
compile 'com.squareup.okhttp:okhttp:2.2.0'
compile 'com.squareup.okhttp:okhttp-urlconnection:2.2.0'
compile 'com.squareup.retrofit:retrofit:1.9.0'
compile 'com.github.ksoichiro:android-observablescrollview:1.4.0'
compile 'com.astuetz:pagerslidingtabstrip:1.0.1'
compile 'com.facebook.android:facebook-android-sdk:4.1.0'
compile 'com.parse.bolts:bolts-android:1.+'
compile 'com.edmodo:rangebar:1.0.0'
compile 'com.melnykov:floatingactionbutton:1.3.0'
compile project(':library_viewpager')
compile project(':androidHorizontalListView')
compile project(':CastCompanionLibrary')
compile project(':mobihelp_sdk_android_v1.4')
compile fileTree(include: 'Parse-*.jar', dir: 'libs')
compile files('libs/Parse-1.9.2.jar')
compile files('libs/GoogleConversionTrackingSdk-2.2.2.jar')
}

CastCompanionLibrary

dependencies {
compile 'com.android.support:appcompat-v7:22.+'
compile 'com.android.support:mediarouter-v7:22.+'
compile 'com.google.android.gms:play-services-cast:7.5.0'
}

我该如何解决？我想错误的发生是因为我在模块和应用程序中都使用谷歌播放服务.但版本不同.是造成问题的？