You have too many methods. There can only be 65536 methods for dex.

As suggested you can use the multidex support.

Just add these lines in the module/build.gradle:

android {       defaultConfig {        ...                // Enabling multidex support.        multiDexEnabled true    }    ...}dependencies {  implementation 'androidx.multidex:multidex:2.0.1'  //with androidx libraries  //implementation 'com.android.support:multidex:1.0.3'  //with support libraries  }

Also in your Manifest add the MultiDexApplication class from the multidex support library to the application element

    <?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="androidx.multidex.MultiDexApplication">            <!-- If you are using support libraries use android:name="android.support.multidex.MultiDexApplication" -->            <!--If you are using your own custom Application class then extend -->            <!--MultiDexApplication and change above line as-->            <!--android:name=".YourCustomApplicationClass"> -->            ...        </application>    </manifest>

If you are using your own Application class, change the parent class from Application to MultiDexApplication.
If you can't do it, in your Application class override the attachBaseContext method with:

@Overrideprotected void attachBaseContext(Context newBase) {    super.attachBaseContext(newBase);    MultiDex.install(this);}

Another solution is to try to remove unused code with ProGuard - Configure the ProGuard settings for your app to run ProGuard and ensure you have shrinking enabled for release builds.

In android/app/build.gradle

android {compileSdkVersion 23 buildToolsVersion '23.0.0'    defaultConfig {        applicationId "com.dkm.example"        minSdkVersion 15        targetSdkVersion 23        versionCode 1        versionName "1.0"        multiDexEnabled true    }

Put this inside your defaultConfig:

multiDexEnabled true 

it works for me

Change the app level build.gradle :

android {compileSdkVersion 23 buildToolsVersion '23.0.0'    defaultConfig {        applicationId "com.dkm.example"        minSdkVersion 15        targetSdkVersion 23        versionCode 1        versionName "1.0"        multiDexEnabled true    }

it worked for me.