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The ClickTerm Android SDK uses listener callbacks to communicate results. The show() and showAcceptedContent() methods accept listener interfaces that fire on success or error.

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Show result

When ClicktermDialog.show() completes: 
ClicktermDialog.show(this, request, null,
    new ClicktermDialog.OnAgreementResultListener() {
        @Override
        public void onSuccess(String clicktermSignature) {
            if (clicktermSignature != null) {
                // User accepted or declined — send Signature to your backend
                sendToBackend(clicktermSignature);
            } else {
                // User already accepted the latest major version — no dialog was shown
                Log.i("Clickterm", "Already accepted.");
            }
        }

        @Override
        public void onError(String message) {
            // SDK or network error
            Log.e("Clickterm", message);
        }
    }
);

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Possible outcomes

OutcomeCallbackclicktermSignature value
User acceptsonSuccessNon-null Signature string — send it to your backend
User declinesonSuccessNon-null Signature string — verify it to record the decline
User already acceptedonSuccessnull — no dialog was shown, no action needed
ErroronErrorN/A — message contains the error description
A null Signature in onSuccess means the user has already accepted the latest major version. No action is needed on your part.

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Error handling

Errors are delivered via the onError callback: 
@Override
public void onError(String message) {
    switch (message) {
        case "SDK not initialized":
            Log.e("Clickterm", "Call ClicktermClient.initialize() first");
            break;
        default:
            Log.e("Clickterm", "Clickwrap error: " + message);
            break;
    }
}
Common error scenarios:
ErrorCause
SDK not initializedClicktermClient.initialize() was not called
Template not foundTemplate is disabled or has no effective version
Network errorCannot reach the ClickTerm API

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Show accepted content result

The showAcceptedContent() method uses a separate listener: 
ClicktermDialog.showAcceptedContent(this, request,
    new ClicktermDialog.OnAcceptedContentListener() {
        @Override
        public void onSuccess(ClickwrapTemplateContent content) {
            // content.getContent() returns the accepted agreement text
            Log.i("Clickterm", content.getContent());
        }

        @Override
        public void onError(String message) {
            Log.e("Clickterm", message);
        }
    }
);
showAcceptedContent only works if the end user has an accepted and verified event for the given template.