How to enable multidexing with the new Android Multidex support library
I want to use the new Multidex support library to break the method limit for one of my apps.
With Android Lollipop Google introduced a multidex support library that makes it easy to multidex.
What steps are needed to use this library and to build my app with multidex support?
Modify your build.gradle :
android {
compileSdkVersion 22
buildToolsVersion "23.0.0"
defaultConfig {
minSdkVersion 14 //lower than 14 doesn't support multidex
targetSdkVersion 22
// Enabling multidex support.
multiDexEnabled true
}
}
dependencies {
compile 'com.android.support:multidex:1.0.3'
}
If you are running unit tests, you will want to include this in your Application class:
public class YouApplication extends Application {
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
MultiDex.install(this);
}
}
For more info, this is a good guide.
The following steps are needed to start multi dexing:
Add android-support-multidex.jar to your project. The jar can be found in your Android SDK folder /sdk/extras/android/support/multidex/library/libs
Now you either let your apps application class extend MultiDexApplication
public class MyApplication extends MultiDexApplication
or you override attachBaseContext like this:
protected void attachBaseContext(Context base) {
super.attachBaseContext(base);
MultiDex.install(this);
}
I used the override approach because that does not mess with the class hierarchy of your application class.
Now your app is ready to use multi dex. The next step is to convince gradle to build a multi dexed apk. The build tools team is working on making this easier, but for the moment you need to add the following to the android part of your apps build.gradle
dexOptions {
preDexLibraries = false
}
And the following to the general part of your apps build.gradle
afterEvaluate {
tasks.matching {
it.name.startsWith('dex')
}.each { dx ->
if (dx.additionalParameters == null) {
dx.additionalParameters = ['--multi-dex']
} else {
dx.additionalParameters += '--multi-dex'
}
}
}
More info can be found on Alex Lipovs blog.
SIMPLY, in order to enable multidex, you need to ...
android {
compileSdkVersion 21
buildToolsVersion "21.1.0"
defaultConfig {
...
minSdkVersion 14
targetSdkVersion 21
...
// Enabling multidex support.
multiDexEnabled true
}
...
}
dependencies {
compile 'com.android.support:multidex:1.0.0'
}
also you must change your manifest file. In your manifest add the MultiDexApplication class from the multidex support library to the application element like this
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.multidex.myapplication">
<application
...
android:name="android.support.multidex.MultiDexApplication">
...
</application>
</manifest>
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