java.lang.ClassNotFound: Didn't find class “android.support.multidex.MultiDexApplication” on path: DexPathList

Question

I`m trying to enable multidex on my app of react-native but I get a error when the app is launched.

I already did the steps in the official doc of android: https://developer.android.com/studio/build/multidex

My build.gradel (android/app/build.gradel)

 defaultConfig {
        ....
        versionName "1.0"
        multiDexEnabled true
    }

    ...

    dependencies {
      implementation 'com.android.support:multidex:1.0.3'

      implementation fileTree(dir: "libs", include: ["*.jar"])

      implementation "com.facebook.react:react-native:+"  // From node_modules

      implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.0.0"

       ...
    }

And my AndroidManifest.xml:

<application
  android:name="android.support.multidex.MultiDexApplication"

  android:label="@string/app_name"
  android:icon="@mipmap/ic_launcher"
  android:roundIcon="@mipmap/ic_launcher_round"
  android:allowBackup="false"
  android:theme="@style/AppTheme">

  ...

</application>

I don't understand what the problem is, why the error keeps happening when I start de app.

I`m using react-native V0.62.2

Answer 1

java.lang.ClassNotFound: Didn't find class “android.support.multidex.MultiDexApplication” on path: DexPathList

Don't

implementation 'com.android.support:multidex:1.0.3'

And

<application
  android:name="android.support.multidex.MultiDexApplication"

AndroidX replaces the original support library APIs with packages in the androidx namespace. So try with

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

FYI

You should call

 implementation 'androidx.multidex:multidex:2.0.1'

Then Clean-Rebuild-Run.