Example usage for android.widget ScrollView setAccessibilityDelegate

Introduction

In this page you can find the example usage for android.widget ScrollView setAccessibilityDelegate.

Prototype

public void setAccessibilityDelegate(@Nullable AccessibilityDelegate delegate) 

Source Link

Document

Sets a delegate for implementing accessibility support via composition (as opposed to inheritance).

Usage

From source file:com.android.switchaccess.SwitchAccessEndToEndTest.java

@MediumTest
public void testScrolling_scroll() {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
        return;//from w  w  w  .  j  av a2  s  .  co  m
    }

    final ScrollView scrollView = (ScrollView) getActivity().findViewById(R.id.scroll_id);
    final CountDownLatch scrollsMissed = new CountDownLatch(1);
    scrollView.setAccessibilityDelegate(new AccessibilityDelegate() {
        @Override
        public boolean performAccessibilityAction(@NonNull View host, int action, Bundle args) {
            if (action == AccessibilityNodeInfoCompat.ACTION_SCROLL_FORWARD) {
                scrollsMissed.countDown();
            }
            return super.performAccessibilityAction(host, action, args);
        }
    });
    sendKeyEventSync(mMoveFocusEvent);
    sendKeyEventSync(mScrollForwardEvent);
    assertEquals(0, scrollsMissed.getCount());
}

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