Java Code Examples for android.view.accessibility.AccessibilityEvent#TYPE_VIEW_FOCUSED

/**
 * Helper method for {@link #shouldDropEvent} that handles events that automatically occur
 * immediately after a window state change.
 *
 * @param event The automatically generated event to consider retaining.
 * @return Whether to retain the event.
 */
private boolean shouldKeepAutomaticEvent(AccessibilityEvent event) {
  final AccessibilityRecordCompat record = AccessibilityEventCompat.asRecord(event);

  // Don't drop focus events from EditTexts.
  if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED) {
    AccessibilityNodeInfoCompat node = null;

    try {
      node = record.getSource();
      if (Role.getRole(node) == Role.ROLE_EDIT_TEXT) {
        return true;
      }
    } finally {
      AccessibilityNodeInfoUtils.recycleNodes(node);
    }
  }

  return false;
}
 

@Override
public void onObserveAccessibilityEvent(AccessibilityEvent event) {
    AccessibilityNodeInfo source = event.getSource();
    if (source == null) {
        return;
    }
    boolean isNewWindow = false;
    if (mCurrentNode == null ||
            mCurrentNode.getWindowId() != source.getWindowId()) {
        isNewWindow = true;
    }
    int t = event.getEventType();
    boolean isInterestingEventType = false;
    if (t == AccessibilityEvent.TYPE_VIEW_SELECTED
            || t == AccessibilityEvent.TYPE_VIEW_FOCUSED
            || t == AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED
            || t != AccessibilityEvent.TYPE_VIEW_HOVER_ENTER) {
        isInterestingEventType = true;
    }
    if (isNewWindow || isInterestingEventType) {
        setPendingNode(source);
    }
}
 

@Override
public void onAccessibilityEvent(AccessibilityEvent event, EventId eventId) {
  switch (event.getEventType()) {
    case AccessibilityEvent.TYPE_VIEW_FOCUSED:
      handleViewInputFocusedEvent(event, eventId);
      break;
    case AccessibilityEvent.TYPE_VIEW_SELECTED:
      handleViewSelectedEvent(event, eventId);
      break;
    case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:
      firstWindowFocusManager.registerWindowStateChangeEvent(event);
      break;
    default:
      break;
  }
}
 

public static int[] getAllEventTypes() {
  return new int[] {
    AccessibilityEvent.TYPE_ANNOUNCEMENT,
    AccessibilityEvent.TYPE_ASSIST_READING_CONTEXT,
    AccessibilityEvent.TYPE_GESTURE_DETECTION_END,
    AccessibilityEvent.TYPE_GESTURE_DETECTION_START,
    AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED,
    AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END,
    AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_START,
    AccessibilityEvent.TYPE_TOUCH_INTERACTION_END,
    AccessibilityEvent.TYPE_TOUCH_INTERACTION_START,
    AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED,
    AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED,
    AccessibilityEvent.TYPE_VIEW_CLICKED,
    AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED,
    AccessibilityEvent.TYPE_VIEW_FOCUSED,
    AccessibilityEvent.TYPE_VIEW_HOVER_ENTER,
    AccessibilityEvent.TYPE_VIEW_HOVER_EXIT,
    AccessibilityEvent.TYPE_VIEW_LONG_CLICKED,
    AccessibilityEvent.TYPE_VIEW_SCROLLED,
    AccessibilityEvent.TYPE_VIEW_SELECTED,
    AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED,
    AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED,
    AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY,
    AccessibilityEvent.TYPE_WINDOWS_CHANGED,
    AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED,
    AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED
  };
}
 

@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. AdapterView 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 AdapterView 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;
}
 

@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. AdapterView 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 AdapterView 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;
}
 

@Override
public void onAccessibilityEvent(AccessibilityEvent event, EventId eventId) {
  switch (event.getEventType()) {
    case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED:
      // Keep track of the accessibility focused EditText.
      overlay.hide();
      saveFocusedNode(AccessibilityEventCompat.asRecord(event));
      break;
    case AccessibilityEvent.TYPE_VIEW_FOCUSED:
      // On pre Android O devices, double-tap on screen will interpreted as touch down and up
      // action at the center of the focused node, which might set cursor to the middle of text if
      // the text is long enough. TalkBack overrides the cursor position to be the end of the
      // field to avoid the confusion of cursor movement. See  for details.
      if (SHOULD_HANDLE_TOUCH_EVENT) {
        // Reset the EditText cursor because focusing will snap it to the middle.
        resetNodeCursor(AccessibilityEventCompat.asRecord(event), eventId);
      }
      break;
    case AccessibilityEvent.TYPE_VIEW_SCROLLED:
      // Hide the overlay so it doesn't interfere with scrolling.
      overlay.hide();
      break;
    case AccessibilityEvent.TYPE_TOUCH_INTERACTION_START:
      if (SHOULD_HANDLE_TOUCH_EVENT) {
        // Show the overlay if the a11y-focused EditText is editing and we touch the screen.
        touchStart(event, eventId);
      }
      break;
    case AccessibilityEvent.TYPE_TOUCH_INTERACTION_END:
      if (SHOULD_HANDLE_TOUCH_EVENT) {
        // Hide the overlay when we stop touching the screen.
        touchEnd(event, eventId);
      }
      break;
    default: // fall out
  }
}
 

@Override
public void onAccessibilityEvent(AccessibilityEvent event, EventId eventId) {
  if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
    processTextSelectionChange(event);
  } else if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED) {
    processViewInputFocused(event);
  }
}
 

@Override
public int getRelevantEventTypes(int relevantEventTypes) {
    return relevantEventTypes | AccessibilityEvent.TYPE_VIEW_FOCUSED
            | AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED
            | AccessibilityEvent.TYPE_VIEW_CLICKED
            | AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED;
}
 

@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. AdapterView 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 AdapterView 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;
}
 

@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. AdapterView 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 AdapterView 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;
}
 

@Override
public void sendAccessibilityEventUnchecked(AccessibilityEvent event) {
    if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED) {
        // Since we're replacing the text every time we add or remove a
        // character, only read the difference. (issue 5337550)
        final int added = event.getAddedCount();
        final int removed = event.getRemovedCount();
        final int length = event.getBeforeText().length();
        if (added > removed) {
            event.setRemovedCount(0);
            event.setAddedCount(1);
            event.setFromIndex(length);
        } else if (removed > added) {
            event.setRemovedCount(1);
            event.setAddedCount(0);
            event.setFromIndex(length - 1);
        } else {
            return;
        }
    } else if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED) {
        // The parent EditText class lets tts read "edit box" when this View
        // has a focus, which
        // confuses users on app launch (issue 5275935).
        return;
    }
    super.sendAccessibilityEventUnchecked(event);
}
 

public void handleAccessibilityEvent(AccessibilityEvent event, AccessibilityNodeInfo rootNode){

        switch (event.getEventType()) {
            case AccessibilityEvent.TYPE_VIEW_FOCUSED:
                onViewFocused(event, rootNode);
                break;
            case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED:
                onViewTextChanged(event);
                break;
            default:
                break;
        }

    }
 

public void handleAccessibilityEvent(AccessibilityEvent event, AccessibilityNodeInfo rootNode){
    int eventType = event.getEventType();
    if (eventType == AccessibilityEvent.TYPE_VIEW_CLICKED
            || eventType == AccessibilityEvent.TYPE_VIEW_LONG_CLICKED
            || eventType == AccessibilityEvent.TYPE_VIEW_FOCUSED
            || eventType == AccessibilityEvent.TYPE_VIEW_SELECTED) {
        AccEvent accEvent = new AccEvent(event, rootNode);
        accEvent.setFieldValue(AccEvent.SOURCE_NODE, event.getSource());
        this.output(accEvent);
    }
}
 

public static String typeToString(int eventType) {
  switch (eventType) {
    case AccessibilityEvent.TYPE_ANNOUNCEMENT:
      return "TYPE_ANNOUNCEMENT";
    case AccessibilityEvent.TYPE_ASSIST_READING_CONTEXT:
      return "TYPE_ASSIST_READING_CONTEXT";
    case AccessibilityEvent.TYPE_GESTURE_DETECTION_END:
      return "TYPE_GESTURE_DETECTION_END";
    case AccessibilityEvent.TYPE_GESTURE_DETECTION_START:
      return "TYPE_GESTURE_DETECTION_START";
    case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:
      return "TYPE_NOTIFICATION_STATE_CHANGED";
    case AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END:
      return "TYPE_TOUCH_EXPLORATION_GESTURE_END";
    case AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_START:
      return "TYPE_TOUCH_EXPLORATION_GESTURE_START";
    case AccessibilityEvent.TYPE_TOUCH_INTERACTION_END:
      return "TYPE_TOUCH_INTERACTION_END";
    case AccessibilityEvent.TYPE_TOUCH_INTERACTION_START:
      return "TYPE_TOUCH_INTERACTION_START";
    case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED:
      return "TYPE_VIEW_ACCESSIBILITY_FOCUSED";
    case AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED:
      return "TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED";
    case AccessibilityEvent.TYPE_VIEW_CLICKED:
      return "TYPE_VIEW_CLICKED";
    case AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED:
      return "TYPE_VIEW_CONTEXT_CLICKED";
    case AccessibilityEvent.TYPE_VIEW_FOCUSED:
      return "TYPE_VIEW_FOCUSED";
    case AccessibilityEvent.TYPE_VIEW_HOVER_ENTER:
      return "TYPE_VIEW_HOVER_ENTER";
    case AccessibilityEvent.TYPE_VIEW_HOVER_EXIT:
      return "TYPE_VIEW_HOVER_EXIT";
    case AccessibilityEvent.TYPE_VIEW_LONG_CLICKED:
      return "TYPE_VIEW_LONG_CLICKED";
    case AccessibilityEvent.TYPE_VIEW_SCROLLED:
      return "TYPE_VIEW_SCROLLED";
    case AccessibilityEvent.TYPE_VIEW_SELECTED:
      return "TYPE_VIEW_SELECTED";
    case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED:
      return "TYPE_VIEW_TEXT_CHANGED";
    case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED:
      return "TYPE_VIEW_TEXT_SELECTION_CHANGED";
    case AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY:
      return "TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY";
    case AccessibilityEvent.TYPE_WINDOWS_CHANGED:
      return "TYPE_WINDOWS_CHANGED";
    case AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED:
      return "TYPE_WINDOW_CONTENT_CHANGED";
    case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:
      return "TYPE_WINDOW_STATE_CHANGED";
    default:
      return "(unhandled)";
  }
}
 

public void onAccessibilityEvent(AccessibilityEvent event, EventId eventId) {

    if (testingListener != null) {
      testingListener.onAccessibilityEvent(event);
    }

    if ((dumpEventMask & event.getEventType()) != 0) {
      LogUtils.v(TAG, DUMP_EVENT_LOG_FORMAT, event);
    }

    if (shouldDropRefocusEvent(event)) {
      return;
    }

    if (shouldDropEvent(event)) {
      return;
    }

    if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
      lastWindowStateChanged = SystemClock.uptimeMillis();
    }

    if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED
        || event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED
        || event.getEventType() == AccessibilityEvent.TYPE_WINDOWS_CHANGED) {
      service.setRootDirty(true);
    }

    // We need to save the last focused event so that we can filter out related selected events.
    if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED) {
      if (lastFocusedEvent != null) {
        lastFocusedEvent.recycle();
      }

      lastFocusedEvent = AccessibilityEvent.obtain(event);
    }

    if (AccessibilityEventUtils.eventMatchesAnyType(event, MASK_DELAYED_EVENT_TYPES)) {
      handler.postProcessEvent(event, eventId);
    } else {
      processEvent(event, eventId);
    }

    if (testingListener != null) {
      testingListener.afterAccessibilityEvent(event);
    }
  }
 

@Override
public AccessibilityEvent onAccessibilityEvent(AccessibilityEvent event,
        boolean accessibilityEnabled, int relevantEventTypes) {
    final int type = event.getEventType();
    if (sVerbose) {
        // NOTE: this is waaay spammy, but that's life.
        Log.v(TAG, "onAccessibilityEvent(" + AccessibilityEvent.eventTypeToString(type)
                + "): virtualId="
                + AccessibilityNodeInfo.getVirtualDescendantId(event.getSourceNodeId())
                + ", client=" + getClient());
    }
    switch (type) {
        case AccessibilityEvent.TYPE_VIEW_FOCUSED: {
            synchronized (mLock) {
                if (mFocusedWindowId == event.getWindowId()
                        && mFocusedNodeId == event.getSourceNodeId()) {
                    return event;
                }
                if (mFocusedWindowId != AccessibilityWindowInfo.UNDEFINED_WINDOW_ID
                        && mFocusedNodeId != AccessibilityNodeInfo.UNDEFINED_NODE_ID) {
                    notifyViewExited(mFocusedWindowId, mFocusedNodeId);
                    mFocusedWindowId = AccessibilityWindowInfo.UNDEFINED_WINDOW_ID;
                    mFocusedNodeId = AccessibilityNodeInfo.UNDEFINED_NODE_ID;
                    mFocusedBounds.set(0, 0, 0, 0);
                }
                final int windowId = event.getWindowId();
                final long nodeId = event.getSourceNodeId();
                if (notifyViewEntered(windowId, nodeId, mFocusedBounds)) {
                    mFocusedWindowId = windowId;
                    mFocusedNodeId = nodeId;
                }
            }
        } break;

        case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED: {
            synchronized (mLock) {
                if (mFocusedWindowId == event.getWindowId()
                        && mFocusedNodeId == event.getSourceNodeId()) {
                    notifyValueChanged(event.getWindowId(), event.getSourceNodeId());
                }
            }
        } break;

        case AccessibilityEvent.TYPE_VIEW_CLICKED: {
            synchronized (mLock) {
                notifyViewClicked(event.getWindowId(), event.getSourceNodeId());
            }
        } break;

        case AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED: {
            final AutofillClient client = getClient();
            if (client != null) {
                synchronized (mLock) {
                    if (client.autofillClientIsFillUiShowing()) {
                        notifyViewEntered(mFocusedWindowId, mFocusedNodeId, mFocusedBounds);
                    }
                    updateTrackedViewsLocked();
                }
            }
        } break;
    }

    return accessibilityEnabled ? event : null;
}