In general, you should send an AccessibilityEvent whenever the content of your custom view changes. For example, if you are implementing a custom slider bar that allows a user to select a numeric value by pressing the left or right arrows, your custom view should emit an event of type TYPE_VIEW_TEXT_CHANGED whenever the slider value changes. Which one of the following sample codes demonstrates the use of the sendAccessibilityEvent() method to report this event.

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Marcin Piotrowski · Accepted Answer

@Override public boolean onKeyUp (int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) { currentValue--;sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED); return true;}

Marcin Piotrowski · Answer

@Override public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { boolean completed = super.dispatchPopulateAccessibilityEvent(event); CharSequence text = getText(); if (!TextUtils.isEmpty(text)) { event.getText().add(text); return true;}return completed;}

Marcin Piotrowski · Answer

.}

Marcin Piotrowski · Answer

@Override public boolean onKeyUp (int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_ENTER) { currentValue--;sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED); return true;}

Marcin Piotrowski · Answer

.}

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