在 gradle Android Studio 中排除一个 class 文件

Question

In my projects, I need to import third party jar file and Facebook SDK.

compile files('libs/SkinSDK.jar')
compile 'com.facebook.android:facebook-android-sdk:4.14.0'

Both include same BundleJSONConverter class. So, I cannot do generate signed APK. It always shows duplicate entry com/facebook/internal/BundleJSONConverter.

So, I want to exclude in Facebook or SkinSDK.jar. I tried like

compile ('com.facebook.android:facebook-android-sdk:4.14.0') {
    exclude group: 'com.facebook.internal', module: 'BundleJSONConverter'
}

It's not working and showing same error.

Answer 1

The exclude method of the configuration closure for a dependency excludes transitive dependencies. So, if your module dependency depends on other modules, you can exclude them from your build. You can check out the transitive dependencies of the 'com.facebook.android:facebook-android-sdk:4.14.0' module on its Maven repository info page .

If the BundleJSONConverter class exists in a transitive dependency, you can exclude the specific module in the same way you are trying now. Just specify the group , the module and the version , like you do for dependencies.

If you just want to exclude one class for a dependency jar, take a look at the jar jar links tool and its Gradle plugin. It allows you to alter included jars, eg to change packages or remove classes.

The following (shortened) example shows the usage of the plugin and some methods to alter the dependency jar:

compile jarjar.repackage {
    from 'org.apache.hive:hive-exec:0.13.0.2.1.5.0-695'

    archiveBypass "commons*.jar"
    archiveExclude "slf4j*.jar"

    classDelete "org.apache.thrift.**"
    classRename 'org.json.**', 'org.anarres.hive.json.@1'
}

Answer 2

Bumped into similar situation. This is what I did, not elegant as I hoped, but it works:

1. Rename the jar file (SkinSDK.jar in your case): .zip instead of .jar

2. Go "inside" the zip file (I'm using DoubleCommander, there are many other utilities for that), or extract it to a temporary folder.

3. Delete the duplicate class that causes the problem. Go "outside" the zip file.

4. Rename (or re-pack) the file from .zip to .jar . Compile.

Hope it works...

Answer 3

I had a similar problem with duplicated classes after importing a jar. In my case, the conflict was between a class in that jar and a class in my own project. Below I share the solution you can use to discard classes that you have available in your own source tree, assuming the one in the jar is the right one to use:

android {
   sourceSets {
     main {
       java {
            filter.excludes = [
                    "com/package/Duplicated.java",                      
            ]
       }
     }
   }
}