Attachment widget clear preview if no answer

datacapture/src/androidTest/java/com/google/android/fhir/datacapture/views/QuestionnaireItemAttachmentPickerViewHolderFactoryEspressoTest.kt

@@ -376,6 +376,105 @@ class QuestionnaireItemAttachmentPickerViewHolderFactoryEspressoTest {
  .isEqualTo("Document File")
  }
 
+ @Test
+ fun doNotShowPreviewIfAnswerDoesNotHaveAttachment() {
+ val questionnaireItemView =
+ QuestionnaireItemViewItem(
+ Questionnaire.QuestionnaireItemComponent().apply {
+ addExtension().apply {
+ url = "https://hl7.org/fhir/StructureDefinition/mimeType"
+ setValue(CodeType("image/*"))
+ }
+ addExtension().apply {
+ url = "https://hl7.org/fhir/StructureDefinition/mimeType"
+ setValue(CodeType("application/pdf"))
+ }
+ },
+ QuestionnaireResponse.QuestionnaireResponseItemComponent().apply { addAnswer(null) },
+ validationResult = NotValidated,
+ answersChangedCallback = { _, _, _ -> },
+ )
+
+ runOnUI { viewHolder.bind(questionnaireItemView) }
+
+ assertThat(viewHolder.itemView.findViewById<ImageView>(R.id.photo_preview).visibility)
+ .isEqualTo(View.GONE)
+
+ assertThat(viewHolder.itemView.findViewById<LinearLayout>(R.id.file_preview).visibility)
+ .isEqualTo(View.GONE)
+
+ assertThat(viewHolder.itemView.findViewById<Button>(R.id.delete).visibility)
+ .isEqualTo(View.GONE)
+ }
+
+ @Test
+ fun doNotShowPreviewOfPreviousAnswerAttachmentForCurrentAnswerItem() {
+ val questionnaireItem =
+ QuestionnaireItemViewItem(
+ Questionnaire.QuestionnaireItemComponent().apply {
+ addExtension().apply {
+ url = "https://hl7.org/fhir/StructureDefinition/mimeType"
+ setValue(CodeType("image/*"))
+ }
+ addExtension().apply {
+ url = "https://hl7.org/fhir/StructureDefinition/mimeType"
+ setValue(CodeType("application/pdf"))
+ }
+ },
+ QuestionnaireResponse.QuestionnaireResponseItemComponent().apply {
+ addAnswer(
+ QuestionnaireResponse.QuestionnaireResponseItemAnswerComponent().apply {
+ value =
+ Attachment().apply {
+ title = "IMG_1.jpeg"
+ data =
+ Base64.decode(
+ "R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",
+ Base64.DEFAULT
+ )
+ contentType = "image/jpeg"
+ }
+ }
+ )
+ },
+ validationResult = NotValidated,
+ answersChangedCallback = { _, _, _ -> },
+ )
+
+ runOnUI { viewHolder.bind(questionnaireItem) }
+
+ assertThat(viewHolder.itemView.findViewById<ImageView>(R.id.photo_preview).visibility)
+ .isEqualTo(View.VISIBLE)
+
+ assertThat(viewHolder.itemView.findViewById<Button>(R.id.delete).visibility)
+ .isEqualTo(View.VISIBLE)
+
+ val questionnaireItemWithNullAnswer =
+ QuestionnaireItemViewItem(
+ Questionnaire.QuestionnaireItemComponent().apply {
+ addExtension().apply {
+ url = "https://hl7.org/fhir/StructureDefinition/mimeType"
+ setValue(CodeType("image/*"))
+ }
+ addExtension().apply {
+ url = "https://hl7.org/fhir/StructureDefinition/mimeType"
+ setValue(CodeType("application/pdf"))
+ }
+ },
+ QuestionnaireResponse.QuestionnaireResponseItemComponent().apply { addAnswer(null) },
+ validationResult = NotValidated,
+ answersChangedCallback = { _, _, _ -> },
+ )
+
+ runOnUI { viewHolder.bind(questionnaireItemWithNullAnswer) }
+
+ assertThat(viewHolder.itemView.findViewById<ImageView>(R.id.photo_preview).visibility)
+ .isEqualTo(View.GONE)
+
+ assertThat(viewHolder.itemView.findViewById<Button>(R.id.delete).visibility)
+ .isEqualTo(View.GONE)
+ }
+
  /** Method to run code snippet on UI/main thread */
  private fun runOnUI(action: () -> Unit) {
  activityScenarioRule.getScenario().onActivity { activity -> action() }

datacapture/src/main/java/com/google/android/fhir/datacapture/views/QuestionnaireItemAttachmentViewHolderFactory.kt

@@ -91,7 +91,7 @@ internal object QuestionnaireItemAttachmentViewHolderFactory :
  this.questionnaireItemViewItem = questionnaireItemViewItem
  val questionnaireItem = questionnaireItemViewItem.questionnaireItem
  header.bind(questionnaireItem)
- displayInitialPreview()
+ displayOrClearInitialPreview()
  displayTakePhotoButton(questionnaireItem)
  displayUploadButton(questionnaireItem)
  takePhotoButton.setOnClickListener { view -> onTakePhotoClicked(view, questionnaireItem) }
@@ -124,8 +124,19 @@ internal object QuestionnaireItemAttachmentViewHolderFactory :
  deleteButton.isEnabled = !isReadOnly
  }
 
- private fun displayInitialPreview() {
- questionnaireItemViewItem.answers.firstOrNull()?.valueAttachment?.let { attachment ->
+ private fun displayOrClearInitialPreview() {
+ val answer = questionnaireItemViewItem.answers.firstOrNull()
+
+ // Clear preview if there is no answer to prevent showing old previews in views that have
+ // been recycled.
+ if (answer == null) {
+ clearPhotoPreview()
+ clearFilePreview()
+ hideDeleteButton()
+ return
+ }
+
+ answer.valueAttachment?.let { attachment ->
  displayPreview(
  attachmentType = attachment.contentType.type,
  attachmentTitle = attachment.title,