android studio how to use library dependencies already added in library module

Question

--MyProject (module)
    --build.gradle
        dependencies {
            compile fileTree(include: ['*.jar'], dir: 'libs')
            compile 'com.android.support:appcompat-v7:22.2.1'
            compile project ':MyLib'
        }
--MyLib (module)
    --build.gradle
        dependencies {
            compile 'com.mcxiaoke.volley:library:1.0.16'
            compile 'com.google.code.gson:gson:2.3.1'
        }

In my library module called MyLib , I've added (for example) Gson & Volley as library.

I wish to use Gson and Volley api in the MyProject module without adding the libraries again as dependencies but I can't. And when I add Gson or Volley in the MyProject build.gradle , it causes an error:

multiple dex files define

How can I reuse dependencies that already added in the MyLib module? If this is not possible, how do I avoid this multiple dex files define error? I've tried Android Studio Gradle Error: Multiple dex files define

dexOptions {
    preDexLibraries = false
}

but it didn't help.

Thanks in advance.

Answer 1

If you wish to use the Volley and Gson libraries in each of your modules, you will need to add both libraries as dependencies in both of your build.gradle files ( MyProject and MyLib ).

As for the multiple dex files define error, I would try taking a look at these potential solutions:

• Android Studio build error - Multiple dex files define Landroid/support/v4/
• Unable to execute dex: Multiple dex files define Lcom/myapp/R$array;

Good luck!