Enable Multidex Support for Unity 2020.

Hi,

I'm looking for guidance on how to enable Multidex with Unity 2020. I'm using Mopub. Thank you so much for any help.

 

I can't get it to work. I'm getting "Could not find com.androidx.multidex:multidex:2.0.1"

But I have read that you need to enable and modifythe following in Edit>Project Settings>Player>Publishing Settings
Custom Main Manifest
Custom Launcher Gradle Template
Custom Gradle Properties Template

Custom Main Manifest - application line should read as follows

Code (csharp):

1. <application android:name="androidx.multidex.MultiDexApplication">

Custom Launcher Gradle Template - Add multidex to dependencies and multiDexEnabled true to defaultConfig

Code (csharp):

1. dependencies {
2.     implementation 'com.androidx.multidex:multidex:2.0.1'
3.     ...
4.     }
5. android {
6.     ...
7.     defaultConfig {
8.         ...
9.         multiDexEnabled true
10.         ...
11.     }
12. }

Custom Gradle Properties Template - add the following below **ADDITIONAL_PROPERTIES**

Code (csharp):

1. **ADDITIONAL_PROPERTIES**
2.  
3. android.enableJetifier=true
4. android.useAndroidX=true
5.  

If anyone has gotten this to work successfully please help.

 

in Edit>Project Settings>Player>Publishing Settings enable:

Custom Main Gradle Template

Custom Launcher Gradle Template

Custom Gradle Properties Template

But edit only Custom Launcher Gradle Template.This video helps me.
You should add new dependence

implementation 'androidx.multidex:multidex:2.0.1'

and new setting for defaultConfig

multiDexEnabled true

So my Custom Launcher Gradle Template now looks

Code (CSharp):

1. // GENERATED BY UNITY. REMOVE THIS COMMENT TO PREVENT OVERWRITING WHEN EXPORTING AGAIN
2.  
3. apply plugin: 'com.android.application'
4.  
5. dependencies {
6.     implementation project(':unityLibrary')
7.     implementation 'androidx.multidex:multidex:2.0.1'
8.     }
9.  
10. android {
11.     compileSdkVersion **APIVERSION**
12.     buildToolsVersion '**BUILDTOOLS**'
13.  
14.     compileOptions {
15.         sourceCompatibility JavaVersion.VERSION_1_8
16.         targetCompatibility JavaVersion.VERSION_1_8
17.     }
18.  
19.     defaultConfig {
20.     multiDexEnabled true
21.         minSdkVersion **MINSDKVERSION**
22.         targetSdkVersion **TARGETSDKVERSION**
23.         applicationId '**APPLICATIONID**'
24.         ndk {
25.             abiFilters **ABIFILTERS**
26.         }
27.         versionCode **VERSIONCODE**
28.         versionName '**VERSIONNAME**'
29.     }
30.  
31.     aaptOptions {
32.         noCompress = ['.ress', '.resource', '.obb'] + unityStreamingAssets.tokenize(', ')
33.         ignoreAssetsPattern = "!.svn:!.git:!.ds_store:!*.scc:.*:!CVS:!thumbs.db:!picasa.ini:!*~"
34.     }**SIGN**
35.  
36.     lintOptions {
37.         abortOnError false
38.     }
39.  
40.     buildTypes {
41.         debug {
42.             minifyEnabled **MINIFY_DEBUG**
43.             proguardFiles getDefaultProguardFile('proguard-android.txt')**SIGNCONFIG**
44.             jniDebuggable true
45.         }
46.         release {
47.             minifyEnabled **MINIFY_RELEASE**
48.             proguardFiles getDefaultProguardFile('proguard-android.txt')**SIGNCONFIG**
49.         }
50.     }**PACKAGING_OPTIONS****SPLITS**
51. **BUILT_APK_LOCATION**
52.     bundle {
53.         language {
54.             enableSplit = false
55.         }
56.         density {
57.             enableSplit = false
58.         }
59.         abi {
60.             enableSplit = true
61.         }
62.     }
63. }**SPLITS_VERSION_CODE****LAUNCHER_SOURCE_BUILD_SETUP**
64.  

 

Hi. I've implemented steps mentioned in this thread, but got an error:

Code (CSharp):

1. java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.mycompany.myapp/androidx.multidex.MultiDexApplication}: java.lang.ClassCastException: androidx.multidex.MultiDexApplication cannot be cast to android.app.Activity

and application crash immediately. A possible solution is to build android project by unity and edit it: inherit MyApplication from MultiDexApplication, but I hope this is unnecessary. Any ideas? Is it related specially to androidx?

 

Hi,
if you people are still having problems regarding multidex, i figured it out . \

I was
Using
Unity version: 2020.3.20f1
AppsFlyer version: 6.4.0
Facbook SDK version : 11.0.0
EDM4U version: 1.2.167
Unified native admob sdk
,
having jetifier enabled in EDM4U and
dependencies {
implementation 'com.androidx.multidex:multidex:2.0.1'
...
}
android {
...
defaultConfig {
...
multiDexEnabled true
...
}
}
in launcher gradle file and
# Android Resolver Properties Start
android.useAndroidX=true
android.enableJetifier=true
# Android Resolver Properties End
in gradle properties file , after force resolving dependencies, regenerating android manifest, still getting gradle failed error
> Could not find com.androidx.multidex:multidex:2.0.1. Required by: project :launcher unity

basically i was opting to use multidex because of 64k limit error. Even if i was managing to build using multidex, i had missing class errors in logcat of admob/facebook

the solution is quite simple.



check these items in player settings,


use the settings for EDM4U

and just dont add multi dex code i.e.
dependencies {
implementation 'com.androidx.multidex:multidex:2.0.1'
...
}
android {
...
defaultConfig {
...
multiDexEnabled true
...
}
}

in launcher gradle. just go for build, test your sdks and it will work

 

As of 2022/01/20, Unity 2020.3.26f1 this is what worked for me:

• Go into Menu -> Assets/Play Services Resolver/Android Resolver/Settings and check Enable Auto-Resolution and Prompt Before Auto-Resolution
  
• Open Project Settings and check:
  • Custom Launcher Gradle Template
    
  • Custom Gradle Properties Template
• Edit Plugins/Android/launcherTemplate.gradle and add
  • implementation 'androidx.multidex:multidex:2.0.1' in dependencies {}
    
  • multiDexEnabled true in android { defaultConfig {} }
• Edit Plugins/Android/gradleTemplate.properties and add
  • android.useAndroidX=true
• The Android Resolver should kick off and resolve all the dependencies. If not, use Menu -> Assets/Play Services Resolver/Android Resolver/Resolve

 

Not all heroes wear capes indeed! Thanks @jokigenki
I was getting this error on logcat and the steps above resolved the issue.

Code (CSharp):

1. Didn't find class "android.support.multidex.MultiDexApplication" on path: DexPathList

 

Where exactly in the launcher template should these two lines be placed?

Same question for the gradle template, although that file is much simpler, has no structure and it looks like putting the line before or after **ADDITIONAL PROPERTIES** wouldn't make much of a difference.

 

The (start of the) launchTemplate looks like this (you might need to update the JavaVersion, depending on which JDK you're using):

Code (CSharp):

1. dependencies {
2.     implementation project(':unityLibrary')
3.     implementation 'androidx.multidex:multidex:2.0.1'
4.     }
5.  
6. android {
7.     compileSdkVersion **APIVERSION**
8.     buildToolsVersion '**BUILDTOOLS**'
9.  
10.     compileOptions {
11.         sourceCompatibility JavaVersion.VERSION_1_8
12.         targetCompatibility JavaVersion.VERSION_1_8
13.     }
14.  
15.     defaultConfig {
16.         minSdkVersion **MINSDKVERSION**
17.         targetSdkVersion **TARGETSDKVERSION**
18.         applicationId '**APPLICATIONID**'
19.         ndk {
20.             abiFilters **ABIFILTERS**
21.         }
22.         versionCode **VERSIONCODE**
23.         versionName '**VERSIONNAME**'
24.         multiDexEnabled true
25.     }...

The gradleTemplate looks like:

Code (CSharp):

1. org.gradle.jvmargs=-Xmx**JVM_HEAP_SIZE**M
2. org.gradle.parallel=true
3. android.enableR8=**MINIFY_WITH_R_EIGHT**
4. android.useAndroidX=true
5. unityStreamingAssets=.unity3d**STREAMING_ASSETS**
6. # Android Resolver Properties Start
7. android.useAndroidX=true
8. android.enableJetifier=true
9. # Android Resolver Properties End
10. **ADDITIONAL_PROPERTIES**

 

Also worth noting that multidexing is (possibly) enabled by default for build targets >21 https://developer.android.com/studio/build/multidex

 

Possibly... more like "it may just fail for no reason but yeah we threw this in and... err.. good luck" kind of solution. Unsurprisingly, a suggestion by the Gradle report failed to solve the building issue.