Plaid Link for Android

import com.plaid.link.Plaid;
import com.plaid.linkbase.PlaidOptions;

public class MainApplication extends Application {

  @Override
  public void onCreate() {
    super.onCreate();

    Plaid.create(this);
  }
}

import java.util.ArrayList;
import android.content.Intent;
import androidx.appcompat.app.AppCompatActivity;

import com.plaid.link.LinkActivity;
import com.plaid.link.Plaid;
import com.plaid.linkbase.models.LinkConfiguration;
import com.plaid.linkbase.models.LinkEventListener;
import com.plaid.linkbase.models.PlaidApiError;
import com.plaid.linkbase.models.PlaidEnvironment;
import com.plaid.linkbase.models.PlaidProduct;

public class MainActivity extends AppCompatActivity {

  private static final int LINK_REQUEST_CODE = 1;

  @Override
  protected void onCreate(Bundle savedInstanceState) {

    Plaid.setLinkEventListener(LinkEventListener{})

    // Open Link – put this inside of a Button / Fab click listener
    ArrayList products = new ArrayList<>();
      products.add(PlaidProduct.TRANSACTIONS);
    Plaid.openLink(
        this,
        new LinkConfiguration()
          // required values in builder constructor, clientName, products and webviewRedirectUri
          .Builder(
            "My Application name", 
            products, 
            "myapp://plaid-redirect"
          )
            //optional
            .environment(PlaidEnvironment.SANDBOX) // Defaults to plaid options value if set or SANDBOX 
            .language(Locale.ENGLISH.language) // Defaults to English
            .countryCodes(Arrays.listOf(Locale.US.country)) // Defaults to US
            .webhook("https://requestb.in")
            .userEmailAddress("John Appleseed")
            .userLegalName("jappleseed@example.net")
            .userPhoneNumber("+1 (512) 555-1234")
          .build()
        ),
        LINK_REQUEST_CODE
      );
  }
}

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

  private static final int LINK_REQUEST_CODE = 1;

  // configured in the previous step
  @Override
  public void onCreate() { ... }

  @Override
  protected void onActivityResult(
    int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == LINK_REQUEST_CODE && data != null) {
      if (resultCode == Plaid.RESULT_SUCCESS) {
        // handle onSuccess
        // ...
      } else if (resultCode == Plaid.RESULT_EXIT) {
        // handle onExit
        // ...
      } else if (resultCode == Plaid.RESULT_CANCELLED) {
        // handle onCancelled
        // ...
      } else if (resultCode == Plaid.RESULT_EXCEPTION) {
        // handle onError
        // ...
      }
    } else {
      Log.i(this.getClass().getSimpleName(), "Not handled");
    }
  }
}

@Override
protected void onActivityResult(
int requestCode, int resultCode, @Nullable Intent data) {
  // ...
  if (requestCode == LINK_REQUEST_CODE && data != null) {

    // Handle onSuccess
    if (resultCode == Plaid.RESULT_SUCCESS) {
      LinkConnection item = (LinkConnection)
        data.getSerializableExtra(Plaid.LINK_RESULT);

      if (item != null) {
        // Send public_token to your server,
        // exchange for access_token
        String publicToken = item.getPublicToken();

        LinkConnectionMetadata metadata =
          item.getLinkConnectionMetadata();
        String accountId =
          metadata.getAccounts().get(0).getAccountId();
        String accountName =
          metadata.getAccounts().get(0).getAccountName();
        String accountNumber =
          metadata.getAccounts().get(0).getAccountNumber();
        String accountType =
          metadata.getAccounts().get(0).getAccountType();
        String accountType =
          metadata.getAccounts().get(0).getAccountSubType();
        String institutionId = metadata.getInstitutionId();
        String institutionName = metadata.getInstitutionName();
      }
    }
  }
}

@Override
protected void onActivityResult(
int requestCode, int resultCode, @Nullable Intent data) {
  // ...
  if (requestCode == LINK_REQUEST_CODE && data != null) {

    // Handle onExit
    if (resultCode == resultCode == Plaid.RESULT_EXIT) {
      PlaidApiError error = (PlaidApiError)
        data.getSerializableExtra(Plaid.LINK_RESULT);

      if (error != null) {
        String errorType = error.getErrorType()
        String errorCode = error.getErrorCode()
        String errorMessage = error.getErrorMessage();
        String displayMessage = error.getDisplayMessage();

        LinkExitMetadata metadata = error.getLinkExitMetadata();
        String institutionId = metadata.getInstitutionId();
        String institutionName = metadata.getInstitutionName();
        String status = metadata.getStatus();
    }
  }
}

@Override
protected void onActivityResult(
int requestCode, int resultCode, @Nullable Intent data) {
  // ...
  if (requestCode == LINK_REQUEST_CODE && data != null) {

    // Handle onCancelled
    if (resultCode == Plaid.RESULT_CANCELLED) {
      LinkCancellation cancellation = (LinkCancellation)
        data.getSerializableExtra(Plaid.LINK_RESULT);

      if (cancellation != null) {
        String insId = cancellation.getInstitutionId();
        String insName = cancellation.getInstitutionName();
        String linkSessionId = cancellation.getLinkSessionId();
        String status = cancellation.getStatus();
        String exitStatus = cancellation.getExitStatus();
    }
  }
}

@Override
protected void onActivityResult(
int requestCode, int resultCode, @Nullable Intent data) {
  // ...
  if (requestCode == LINK_REQUEST_CODE && data != null) {

    // Handle onExit
    if (resultCode == Plaid.RESULT_EXCEPTION) {
      Exception exception =
        (Exception) data.getSerializableExtra(Plaid.LINK_RESULT);
      if (exception != null) {
        String errorClass = exception.getClass().toString();
        String message = exception.getMessage();
      }
    }
  }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
  val linkEventListener = LinkEventListener {
    String event = linkEvent.getEvent();
  }

  intent.putExtra(
    Plaid.LINK_CONFIGURATION,
    new LinkConfiguration(
      // ...
      linkEventListener,
  ));
}

intent.putExtra(
  Plaid.LINK_CONFIGURATION,
  LinkConfiguration(
    ...,
    "<#GENERATED_PUBLIC_TOKEN#>",
    ...
  )
);

import com.plaid.link.Plaid;
import com.plaid.linkbase.PlaidOptions;
import com.plaid.linkbase.models.PlaidEnvironment
import com.plaid.linkbase.models.PlaidOptions
import com.plaid.plog.LogLevel
import android.text.TextUtils

public class MainApplication extends Application {

  @Override
  public void onCreate() {
    super.onCreate();

    Plaid.create(this,
    PlaidOptions.Builder()
        .logLevel(BuildConfig.DEBUG ? LogLevel.VERBOSE : LogLevel.ERROR)
        .environment(BuildConfig.DEBUG ? PlaidEnvironment.SANDBOX : PlaidEnvironment.PRODUCTION)
        .publicKey(TextUtils.isEmpty(publicKey) ? null : publicKey)
        .build());
  }
}

PlaidOptions plaidOptions =
  new PlaidOptions.Builder()
    .logLevel(BuildConfig.DEBUG ? LogLevel.DEBUG : LogLevel.ASSERT)
    .build();

Plaid.create(this, plaidOptions);