On Input

Ensure it is predictable what will happen when entering data. In case the focus moves automatically on correct input, this should be indicated in advance. Indicate if a new screen will be opened when submitting a form. Unexpected actions can confuse users with visual or cognitive impairments.

Impact#

Users with visual or cognitive impairments may be confused by unexpected actions.

Check#

“Are there any unexpected actions while entering data?”

This can be tested without assistive technologies.

Solution#

Check input behavior#

private val textWatcher = object : TextWatcher {
  override fun afterTextChanged(s: Editable?) {
    // Ignored
  }

  override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
    // Ignored
  }

  override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
    // Do not change context
  }
}