@Override
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
boolean populated = false;
// This is an exceptional case which occurs when a window gets the
// focus and sends a focus event via its focused child to announce
// current focus/selection. CarouselAdapter fires selection but not focus
// events so we change the event type here.
if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED) {
event.setEventType(AccessibilityEvent.TYPE_VIEW_SELECTED);
}
// we send selection events only from CarouselAdapter to avoid
// generation of such event for each child
View selectedView = getSelectedView();
if (selectedView != null) {
populated = selectedView.dispatchPopulateAccessibilityEvent(event);
}
if (!populated) {
if (selectedView != null) {
event.setEnabled(selectedView.isEnabled());
}
event.setItemCount(getCount());
event.setCurrentItemIndex(getSelectedItemPosition());
}
return populated;
}
private static void populateEventFromJSON(AccessibilityEvent event, JSONObject message) {
final JSONArray textArray = message.optJSONArray("text");
if (textArray != null) {
for (int i = 0; i < textArray.length(); i++) event.getText().add(textArray.optString(i));
}
event.setContentDescription(message.optString("description"));
event.setEnabled(message.optBoolean("enabled", true));
event.setChecked(message.optBoolean("checked"));
event.setPassword(message.optBoolean("password"));
event.setAddedCount(message.optInt("addedCount", -1));
event.setRemovedCount(message.optInt("removedCount", -1));
event.setFromIndex(message.optInt("fromIndex", -1));
event.setItemCount(message.optInt("itemCount", -1));
event.setCurrentItemIndex(message.optInt("currentItemIndex", -1));
event.setBeforeText(message.optString("beforeText"));
if (Versions.feature14Plus) {
event.setToIndex(message.optInt("toIndex", -1));
event.setScrollable(message.optBoolean("scrollable"));
event.setScrollX(message.optInt("scrollX", -1));
event.setScrollY(message.optInt("scrollY", -1));
}
if (Versions.feature15Plus) {
event.setMaxScrollX(message.optInt("maxScrollX", -1));
event.setMaxScrollY(message.optInt("maxScrollY", -1));
}
}
/**
* Sends the specified text to the {@link AccessibilityManager} to be spoken.
*
* @param view The source view.
* @param text The text to speak.
*/
public void announceForAccessibility(final View view, final CharSequence text) {
if (!mAccessibilityManager.isEnabled()) {
Log.e(TAG, "Attempted to speak when accessibility was disabled!");
return;
}
// The following is a hack to avoid using the heavy-weight TextToSpeech
// class. Instead, we're just forcing a fake AccessibilityEvent into
// the screen reader to make it speak.
final AccessibilityEvent event = AccessibilityEvent.obtain();
event.setPackageName(PACKAGE);
event.setClassName(CLASS);
event.setEventTime(SystemClock.uptimeMillis());
event.setEnabled(true);
event.getText().add(text);
// Platforms starting at SDK version 16 (Build.VERSION_CODES.JELLY_BEAN) should use
// announce events.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
event.setEventType(AccessibilityEventCompat.TYPE_ANNOUNCEMENT);
} else {
event.setEventType(AccessibilityEvent.TYPE_VIEW_FOCUSED);
}
final ViewParent viewParent = view.getParent();
if ((viewParent == null) || !(viewParent instanceof ViewGroup)) {
Log.e(TAG, "Failed to obtain ViewParent in announceForAccessibility");
return;
}
viewParent.requestSendAccessibilityEvent(view, event);
}
@Override
public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
super.onInitializeAccessibilityEvent(event);
event.setScrollable(isScrollableForAccessibility());
View selectedView = getSelectedView();
if (selectedView != null) {
event.setEnabled(selectedView.isEnabled());
}
event.setCurrentItemIndex(getSelectedItemPosition());
event.setFromIndex(getFirstVisiblePosition());
event.setToIndex(getLastVisiblePosition());
event.setItemCount(getCount());
}
private AccessibilityEvent createEventForChild(int i, int j) {
AccessibilityEvent accessibilityevent = AccessibilityEvent.obtain(j);
accessibilityevent.setEnabled(true);
accessibilityevent.setClassName(DEFAULT_CLASS_NAME);
onPopulateEventForVirtualView(i, accessibilityevent);
if (accessibilityevent.getText().isEmpty()
&& accessibilityevent.getContentDescription() == null) {
throw new RuntimeException(
"Callbacks must add text or a content description in populateEventForVirtualViewId()");
} else {
accessibilityevent.setPackageName(mView.getContext().getPackageName());
AccessibilityEventCompat.asRecord(accessibilityevent).setSource(mView, i);
return accessibilityevent;
}
}
public static void a(Snackbar paramSnackbar)
{
String str = b.getText().toString().trim();
if (!TextUtils.isEmpty(str))
{
Context localContext = paramSnackbar.getContext();
AccessibilityManager localAccessibilityManager = (AccessibilityManager)localContext.getSystemService("accessibility");
if (localAccessibilityManager.isEnabled())
{
AccessibilityEvent localAccessibilityEvent = AccessibilityEvent.obtain(32);
localAccessibilityEvent.setClassName(Snackbar.class.getName());
localAccessibilityEvent.setPackageName(localContext.getPackageName());
localAccessibilityEvent.getText().add(str);
localAccessibilityEvent.setEnabled(true);
paramSnackbar = c.getText().toString().trim();
if (!TextUtils.isEmpty(paramSnackbar)) {
localAccessibilityEvent.getText().add(paramSnackbar);
}
localAccessibilityManager.sendAccessibilityEvent(localAccessibilityEvent);
}
}
}
private AccessibilityEvent getEventForItem(T item, int eventType) {
final AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
final int virtualDescendantId = getIdForItem(item);
// Ensure the client has good defaults.
event.setEnabled(true);
// Allow the client to populate the event.
populateEventForItem(item, event);
if (event.getText().isEmpty() && TextUtils.isEmpty(event.getContentDescription())) {
throw new RuntimeException(
"You must add text or a content description in populateEventForItem()");
}
// Don't allow the client to override these properties.
event.setClassName(item.getClass().getName());
event.setPackageName(mParentView.getContext().getPackageName());
record.setSource(mParentView, virtualDescendantId);
return event;
}
