Example usage for android.view View getImportantForAccessibility

Introduction

In this page you can find the example usage for android.view View getImportantForAccessibility.

Prototype

@ViewDebug.ExportedProperty(category = "accessibility", mapping = {
        @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_AUTO, to = "auto"),
        @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_YES, to = "yes"),
        @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO, to = "no"),
        @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, to = "noHideDescendants") })
public int getImportantForAccessibility() 

Source Link

Document

Gets the mode for determining whether this View is important for accessibility.

Usage

From source file:com.google.android.apps.common.testing.accessibility.framework.ViewAccessibilityUtils.java

/**
 * @see View#isImportantForAccessibility()
 *//*from w ww  . jav a  2s.c  o  m*/
public static boolean isImportantForAccessibility(View view) {
    if (view == null) {
        return false;
    }

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        return view.isImportantForAccessibility();
    } else {
        // On earlier APIs, we must piece together accessibility importance from the available
        // properties. We return false incorrectly for some cases where unretrievable listeners
        // prevent us from determining importance.

        // If the developer marked the view as explicitly not important, it isn't.
        int mode = view.getImportantForAccessibility();
        if ((mode == View.IMPORTANT_FOR_ACCESSIBILITY_NO)
                || (mode == View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS)) {
            return false;
        }

        // No parent view can be hiding us. (APIs 19 to 21)
        ViewParent parent = view.getParent();
        while (parent instanceof View) {
            if (((View) parent)
                    .getImportantForAccessibility() == View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) {
                return false;
            }
            parent = parent.getParent();
        }

        // Interrogate the view's other properties to determine importance.
        return (mode == View.IMPORTANT_FOR_ACCESSIBILITY_YES) || isActionableForAccessibility(view)
                || hasListenersForAccessibility(view) || (view.getAccessibilityNodeProvider() != null)
                || (ViewCompat.getAccessibilityLiveRegion(view) != ViewCompat.ACCESSIBILITY_LIVE_REGION_NONE);
    }
}

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From source file:org.chromium.chrome.browser.tab.Tab.java

/**
 * Update whether or not the current native tab and/or web contents are
 * currently visible (from an accessibility perspective), or whether
 * they're obscured by another view./*from   w  w  w.j av  a  2 s  .co  m*/
 */
public void updateAccessibilityVisibility() {
    View view = getView();
    if (view != null) {
        int importantForAccessibility = isObscuredByAnotherViewForAccessibility()
                ? View.IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS
                : View.IMPORTANT_FOR_ACCESSIBILITY_YES;
        if (view.getImportantForAccessibility() != importantForAccessibility) {
            view.setImportantForAccessibility(importantForAccessibility);
            view.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
        }
    }

    ContentViewCore cvc = getContentViewCore();
    if (cvc != null) {
        boolean isWebContentObscured = isObscuredByAnotherViewForAccessibility() || isShowingSadTab();
        cvc.setObscuredByAnotherView(isWebContentObscured);
    }
}

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