appwrite/docs/examples/0.12.x/client-android/java/database/create-document.md

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch
import io.appwrite.Client
import io.appwrite.services.Database

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Client client = new Client(getApplicationContext())
            .setEndpoint("https://[HOSTNAME_OR_IP]/v1") // Your API Endpoint
            .setProject("5df5acd0d48c2"); // Your project ID

        Database database = new Database(client);

        database.createDocument(
            "[COLLECTION_ID]", 
            "[DOCUMENT_ID]", 
            mapOf( "a" to "b" ), 
            new Continuation<Object>() {
                @NotNull
                @Override
                public CoroutineContext getContext() {
                    return EmptyCoroutineContext.INSTANCE;
                }

                @Override
                public void resumeWith(@NotNull Object o) {
                    String json = "";
                    try {
                        if (o instanceof Result.Failure) {
                            Result.Failure failure = (Result.Failure) o;
                            throw failure.exception;
                        } else {
                            Response response = (Response) o;
                            json = response.body().string();
                        }                    
                    } catch (Throwable th) {
                        Log.e("ERROR", th.toString());
                    }
                }
            }
        );
    }
}