To initialize the Amplify Auth and Storage categories you call `Amplify.addPlugin()` method for each category. To complete initialization call `Amplify.configure()`.

Add the following code to your `onCreate()` method in your application class:

<BlockSwitcher>
<Block name="Java">

```java
import android.util.Log;
import com.amplifyframework.auth.cognito.AWSCognitoAuthPlugin;
import com.amplifyframework.core.Amplify;
import com.amplifyframework.storage.s3.AWSS3StoragePlugin;
```

```java
Amplify.addPlugin(new AWSCognitoAuthPlugin());
Amplify.addPlugin(new AWSS3StoragePlugin());
```

Your class will look like this:

```java
public class MyAmplifyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();

        try {
            // Add these lines to add the AWSCognitoAuthPlugin and AWSS3StoragePlugin plugins
            Amplify.addPlugin(new AWSCognitoAuthPlugin());
            Amplify.addPlugin(new AWSS3StoragePlugin());
            Amplify.configure(getApplicationContext());

            Log.i("MyAmplifyApp", "Initialized Amplify");
        } catch (AmplifyException error) {
            Log.e("MyAmplifyApp", "Could not initialize Amplify", error);
        }
    }
}
```

</Block>
<Block name="Kotlin">

```kotlin
import android.util.Log
import com.amplifyframework.auth.cognito.AWSCognitoAuthPlugin
import com.amplifyframework.core.Amplify
import com.amplifyframework.storage.s3.AWSS3StoragePlugin
```

```kotlin
Amplify.addPlugin(AWSCognitoAuthPlugin())
Amplify.addPlugin(AWSS3StoragePlugin())
```

Your class will look like this:

```kotlin
class MyAmplifyApp : Application() {
    override fun onCreate() {
        super.onCreate()

        try {
            // Add these lines to add the AWSCognitoAuthPlugin and AWSS3StoragePlugin plugins
            Amplify.addPlugin(AWSCognitoAuthPlugin())
            Amplify.addPlugin(AWSS3StoragePlugin())
            Amplify.configure(applicationContext)

            Log.i("MyAmplifyApp", "Initialized Amplify")
        } catch (error: AmplifyException) {
            Log.e("MyAmplifyApp", "Could not initialize Amplify", error)
        }
    }
}
```

</Block>
<Block name="RxJava">

```java
import android.util.Log;
import com.amplifyframework.auth.cognito.AWSCognitoAuthPlugin;
import com.amplifyframework.rx.RxAmplify;
import com.amplifyframework.storage.s3.AWSS3StoragePlugin;
```

```java
RxAmplify.addPlugin(new AWSCognitoAuthPlugin());
RxAmplify.addPlugin(new AWSS3StoragePlugin());
```

Your class will look like this:

```java
public class MyAmplifyApp extends Application {
    @Override
    public void onCreate() {
        super.onCreate();

        try {
            // Add these lines to add the AWSCognitoAuthPlugin and AWSS3StoragePlugin plugins
            RxAmplify.addPlugin(new AWSCognitoAuthPlugin());
            RxAmplify.addPlugin(new AWSS3StoragePlugin());
            RxAmplify.configure(getApplicationContext());

            Log.i("MyAmplifyApp", "Initialized Amplify");
        } catch (AmplifyException error) {
            Log.e("MyAmplifyApp", "Could not initialize Amplify", error);
        }
    }
}
```

</Block>
</BlockSwitcher>

Note that because the storage category requires auth, you will need to either configure [guest access](/lib/auth/guest_access) or [sign in a user](/lib/auth/signin) before using features in the storage category.