// Writes the server credentials to file for later use.
private void commitServerCredentials() throws IOException {
try {
ServerCredentials serverCredentials =
new ServerCredentials(
ipAddressField.getText().toString(),
usernameField.getText().toString(),
passwordField.getText().toString(),
syncActivated,
lastSyncSuccessDate);
serverCredentials.write();
} catch (IllegalArgumentException e) {
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
}
