android.support.v4.view.accessibility.AccessibilityNodeInfoCompat#setVisibleToUser ( )源码实例Demo

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
    AccessibilityNodeInfoCompat src) {
  final Rect rect = mTmpRect;

  src.getBoundsInParent(rect);
  dest.setBoundsInParent(rect);

  src.getBoundsInScreen(rect);
  dest.setBoundsInScreen(rect);

  dest.setVisibleToUser(src.isVisibleToUser());
  dest.setPackageName(src.getPackageName());
  dest.setClassName(src.getClassName());
  dest.setContentDescription(src.getContentDescription());

  dest.setEnabled(src.isEnabled());
  dest.setClickable(src.isClickable());
  dest.setFocusable(src.isFocusable());
  dest.setFocused(src.isFocused());
  dest.setAccessibilityFocused(src.isAccessibilityFocused());
  dest.setSelected(src.isSelected());
  dest.setLongClickable(src.isLongClickable());

  dest.addAction(src.getActions());
}
 

private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest, AccessibilityNodeInfoCompat src) {
    Rect rect = this.mTmpRect;
    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);
    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);
    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());
    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());
    dest.addAction(src.getActions());
    dest.setMovementGranularities(src.getMovementGranularities());
}
 

private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest, AccessibilityNodeInfoCompat src) {
    Rect rect = this.mTmpRect;
    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);
    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);
    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());
    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());
    dest.addAction(src.getActions());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
        AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
        AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
                                    AccessibilityNodeInfoCompat src) {
	final Rect rect = mTmpRect;

	src.getBoundsInParent(rect);
	dest.setBoundsInParent(rect);

	src.getBoundsInScreen(rect);
	dest.setBoundsInScreen(rect);

	dest.setVisibleToUser(src.isVisibleToUser());
	dest.setPackageName(src.getPackageName());
	dest.setClassName(src.getClassName());
	dest.setContentDescription(src.getContentDescription());

	dest.setEnabled(src.isEnabled());
	dest.setClickable(src.isClickable());
	dest.setFocusable(src.isFocusable());
	dest.setFocused(src.isFocused());
	dest.setAccessibilityFocused(src.isAccessibilityFocused());
	dest.setSelected(src.isSelected());
	dest.setLongClickable(src.isLongClickable());

	dest.addAction(src.getActions());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
        AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
        AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
        AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately seem to be a few elements that
 * are not easily cloneable using the underlying API. Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
                                    AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());

    dest.setMovementGranularities(src.getMovementGranularities());
}
 

/**
 * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the
 * parent view populated with its virtual descendants.
 *
 * @return An {@link AccessibilityNodeInfoCompat} for the parent view.
 */
private AccessibilityNodeInfoCompat getNodeForHost() {
    // Since we don't want the parent to be focusable, but we can't remove
    // actions from a node, copy over the necessary fields.
    final AccessibilityNodeInfoCompat result = AccessibilityNodeInfoCompat.obtain(mHost);
    final AccessibilityNodeInfoCompat source = AccessibilityNodeInfoCompat.obtain(mHost);
    ViewCompat.onInitializeAccessibilityNodeInfo(mHost, source);

    // Copy over parent and screen bounds.
    source.getBoundsInParent(mTempParentRect);
    source.getBoundsInScreen(mTempScreenRect);
    result.setBoundsInParent(mTempParentRect);
    result.setBoundsInScreen(mTempScreenRect);

    // Set up the parent view, if applicable.
    final ViewParent parent = ViewCompat.getParentForAccessibility(mHost);
    if (parent instanceof View) {
        result.setParent((View) parent);
    }

    // Populate the minimum required fields.
    result.setVisibleToUser(source.isVisibleToUser());
    result.setPackageName(source.getPackageName());
    result.setClassName(source.getClassName());

    // Add the fake root node.
    result.addChild(mHost, ROOT_ID);

    return result;
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
                                    AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());

    dest.setMovementGranularities(src.getMovementGranularities());
}
 

@Override
protected void onPopulateNodeForVirtualView(int virtualViewId, AccessibilityNodeInfoCompat node) {
    final boolean hasBounds = getBoundsForDay(virtualViewId, mTempRect);

    if (!hasBounds) {
        // The day is invalid, kill the node.
        mTempRect.setEmpty();
        node.setContentDescription("");
        node.setBoundsInParent(mTempRect);
        node.setVisibleToUser(false);
        return;
    }

    node.setText(getDayText(virtualViewId));
    node.setContentDescription(getDayDescription(virtualViewId));
    node.setBoundsInParent(mTempRect);

    final boolean isDayEnabled = isDayEnabled(virtualViewId);
    if (isDayEnabled) {
        node.addAction(AccessibilityActionCompat.ACTION_CLICK);
    }

    node.setEnabled(isDayEnabled);

    if (virtualViewId == mActivatedDay) {
        // TODO: This should use activated once that's supported.
        node.setChecked(true);
    }

}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
        AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());

    dest.setMovementGranularities(src.getMovementGranularities());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
        AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());

    dest.setMovementGranularities(src.getMovementGranularities());
}
 

/**
 * This should really be in AccessibilityNodeInfoCompat, but there unfortunately
 * seem to be a few elements that are not easily cloneable using the underlying API.
 * Leave it private here as it's not general-purpose useful.
 */
private void copyNodeInfoNoChildren(AccessibilityNodeInfoCompat dest,
        AccessibilityNodeInfoCompat src) {
    final Rect rect = mTmpRect;

    src.getBoundsInParent(rect);
    dest.setBoundsInParent(rect);

    src.getBoundsInScreen(rect);
    dest.setBoundsInScreen(rect);

    dest.setVisibleToUser(src.isVisibleToUser());
    dest.setPackageName(src.getPackageName());
    dest.setClassName(src.getClassName());
    dest.setContentDescription(src.getContentDescription());

    dest.setEnabled(src.isEnabled());
    dest.setClickable(src.isClickable());
    dest.setFocusable(src.isFocusable());
    dest.setFocused(src.isFocused());
    dest.setAccessibilityFocused(src.isAccessibilityFocused());
    dest.setSelected(src.isSelected());
    dest.setLongClickable(src.isLongClickable());

    dest.addAction(src.getActions());

    dest.setMovementGranularities(src.getMovementGranularities());
}
 

/**
 * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the
 * specified item. Automatically manages accessibility focus actions.
 * <p>
 * Allows the implementing class to specify most node properties, but
 * overrides the following:
 * <ul>
 * <li>{@link AccessibilityNodeInfoCompat#setPackageName}
 * <li>{@link AccessibilityNodeInfoCompat#setClassName}
 * <li>{@link AccessibilityNodeInfoCompat#setParent(View)}
 * <li>{@link AccessibilityNodeInfoCompat#setSource(View, int)}
 * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser}
 * <li>{@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)}
 * </ul>
 * <p>
 * Uses the bounds of the parent view and the parent-relative bounding
 * rectangle specified by
 * {@link AccessibilityNodeInfoCompat#getBoundsInParent} to automatically
 * update the following properties:
 * <ul>
 * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser}
 * <li>{@link AccessibilityNodeInfoCompat#setBoundsInParent(Rect)}
 * </ul>
 *
 * @param virtualViewId The virtual view id for item for which to construct
 *            a node.
 * @return An {@link AccessibilityNodeInfoCompat} for the specified item.
 */
private AccessibilityNodeInfoCompat getNodeForVirtualViewId(int virtualViewId) {
    final AccessibilityNodeInfoCompat node = AccessibilityNodeInfoCompat.obtain();

    // Ensure the client has good defaults.
    node.setEnabled(true);
    node.setClassName(mHost.getClass().getName() + DEFAULT_CLASS_NAME);

    // Allow the client to populate the node.
    populateNodeForVirtualViewId(virtualViewId, node);

    if (TextUtils.isEmpty(node.getText()) && TextUtils.isEmpty(node.getContentDescription())) {
        throw new RuntimeException(
                "You must add text or a content description in populateNodeForVirtualViewId()");
    }

    // Don't allow the client to override these properties.
    node.setPackageName(mHost.getContext().getPackageName());
    node.setParent(mHost, ROOT_ID);
    node.setSource(mHost, virtualViewId);

    // Manage internal accessibility focus state.
    if (mFocusedVirtualViewId == virtualViewId) {
        node.setAccessibilityFocused(true);
        node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    } else {
        node.setAccessibilityFocused(false);
        node.addAction(AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS);
    }

    node.getBoundsInParent(mTempParentRect);
    if (mTempParentRect.isEmpty()) {
        throw new RuntimeException(
                "You must set parent bounds in populateNodeForVirtualViewId()");
    }

    // Set the visibility based on the parent bound.
    if (intersectVisibleToUser(mTempParentRect)) {
        node.setVisibleToUser(true);
        node.setBoundsInParent(mTempParentRect);
    }

    // Calculate screen-relative bound.
    mHost.getLocationOnScreen(mTempGlobalRect);
    final int offsetX = mTempGlobalRect[0];
    final int offsetY = mTempGlobalRect[1];
    mTempScreenRect.set(mTempParentRect);
    mTempScreenRect.offset(offsetX, offsetY);
    node.setBoundsInScreen(mTempScreenRect);

    return node;
}
 

private AccessibilityNodeInfoCompat d(int l)
{
    AccessibilityNodeInfoCompat accessibilitynodeinfocompat = AccessibilityNodeInfoCompat.obtain();
    accessibilitynodeinfocompat.setEnabled(true);
    accessibilitynodeinfocompat.setClassName(b);
    onPopulateNodeForVirtualView(l, accessibilitynodeinfocompat);
    if (accessibilitynodeinfocompat.getText() == null && accessibilitynodeinfocompat.getContentDescription() == null)
    {
        throw new RuntimeException("Callbacks must add text or a content description in populateNodeForVirtualViewId()");
    }
    accessibilitynodeinfocompat.getBoundsInParent(d);
    if (d.isEmpty())
    {
        throw new RuntimeException("Callbacks must set parent bounds in populateNodeForVirtualViewId()");
    }
    int i1 = accessibilitynodeinfocompat.getActions();
    if ((i1 & 0x40) != 0)
    {
        throw new RuntimeException("Callbacks must not add ACTION_ACCESSIBILITY_FOCUS in populateNodeForVirtualViewId()");
    }
    if ((i1 & 0x80) != 0)
    {
        throw new RuntimeException("Callbacks must not add ACTION_CLEAR_ACCESSIBILITY_FOCUS in populateNodeForVirtualViewId()");
    }
    accessibilitynodeinfocompat.setPackageName(h.getContext().getPackageName());
    accessibilitynodeinfocompat.setSource(h, l);
    accessibilitynodeinfocompat.setParent(h);
    int j1;
    int k1;
    if (j == l)
    {
        accessibilitynodeinfocompat.setAccessibilityFocused(true);
        accessibilitynodeinfocompat.addAction(128);
    } else
    {
        accessibilitynodeinfocompat.setAccessibilityFocused(false);
        accessibilitynodeinfocompat.addAction(64);
    }
    if (a(d))
    {
        accessibilitynodeinfocompat.setVisibleToUser(true);
        accessibilitynodeinfocompat.setBoundsInParent(d);
    }
    h.getLocationOnScreen(f);
    j1 = f[0];
    k1 = f[1];
    c.set(d);
    c.offset(j1, k1);
    accessibilitynodeinfocompat.setBoundsInScreen(c);
    return accessibilitynodeinfocompat;
}
 

/**
 * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the
 * specified item. Automatically manages accessibility focus actions.
 * <p>
 * Allows the implementing class to specify most node properties, but
 * overrides the following:
 * <ul>
 * <li>{@link AccessibilityNodeInfoCompat#setPackageName}
 * <li>{@link AccessibilityNodeInfoCompat#setClassName}
 * <li>{@link AccessibilityNodeInfoCompat#setParent(View)}
 * <li>{@link AccessibilityNodeInfoCompat#setSource(View, int)}
 * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser}
 * <li>{@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)}
 * </ul>
 * <p>
 * Uses the bounds of the parent view and the parent-relative bounding
 * rectangle specified by
 * {@link AccessibilityNodeInfoCompat#getBoundsInParent} to automatically
 * update the following properties:
 * <ul>
 * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser}
 * <li>{@link AccessibilityNodeInfoCompat#setBoundsInParent}
 * </ul>
 *
 * @param virtualViewId The virtual view id for item for which to construct
 *            a node.
 * @return An {@link AccessibilityNodeInfoCompat} for the specified item.
 */
private AccessibilityNodeInfoCompat createNodeForChild(int virtualViewId) {
    final AccessibilityNodeInfoCompat node = AccessibilityNodeInfoCompat.obtain();

    // Ensure the client has good defaults.
    node.setEnabled(true);
    node.setClassName(DEFAULT_CLASS_NAME);

    // Allow the client to populate the node.
    onPopulateNodeForVirtualView(virtualViewId, node);

    // Make sure the developer is following the rules.
    if ((node.getText() == null) && (node.getContentDescription() == null)) {
        throw new RuntimeException("Callbacks must add text or a content description in "
                + "populateNodeForVirtualViewId()");
    }

    node.getBoundsInParent(mTempParentRect);
    if (mTempParentRect.isEmpty()) {
        throw new RuntimeException("Callbacks must set parent bounds in "
                + "populateNodeForVirtualViewId()");
    }

    final int actions = node.getActions();
    if ((actions & AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS) != 0) {
        throw new RuntimeException("Callbacks must not add ACTION_ACCESSIBILITY_FOCUS in "
                + "populateNodeForVirtualViewId()");
    }
    if ((actions & AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS) != 0) {
        throw new RuntimeException("Callbacks must not add ACTION_CLEAR_ACCESSIBILITY_FOCUS in "
                + "populateNodeForVirtualViewId()");
    }

    // Don't allow the client to override these properties.
    node.setPackageName(mView.getContext().getPackageName());
    node.setSource(mView, virtualViewId);
    node.setParent(mView);

    // Manage internal accessibility focus state.
    if (mFocusedVirtualViewId == virtualViewId) {
        node.setAccessibilityFocused(true);
        node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    } else {
        node.setAccessibilityFocused(false);
        node.addAction(AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS);
    }

    // Set the visibility based on the parent bound.
    if (intersectVisibleToUser(mTempParentRect)) {
        node.setVisibleToUser(true);
        node.setBoundsInParent(mTempParentRect);
    }

    // Calculate screen-relative bound.
    mView.getLocationOnScreen(mTempGlobalRect);
    final int offsetX = mTempGlobalRect[0];
    final int offsetY = mTempGlobalRect[1];
    mTempScreenRect.set(mTempParentRect);
    mTempScreenRect.offset(offsetX, offsetY);
    node.setBoundsInScreen(mTempScreenRect);

    return node;
}
 

/**
 * Constructs and returns an {@link AccessibilityNodeInfoCompat} for the
 * specified item. Automatically manages accessibility focus actions.
 * <p>
 * Allows the implementing class to specify most node properties, but
 * overrides the following:
 * <ul>
 * <li>{@link AccessibilityNodeInfoCompat#setPackageName}
 * <li>{@link AccessibilityNodeInfoCompat#setClassName}
 * <li>{@link AccessibilityNodeInfoCompat#setParent(View)}
 * <li>{@link AccessibilityNodeInfoCompat#setSource(View, int)}
 * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser}
 * <li>{@link AccessibilityNodeInfoCompat#setBoundsInScreen(Rect)}
 * </ul>
 * <p>
 * Uses the bounds of the parent view and the parent-relative bounding
 * rectangle specified by
 * {@link AccessibilityNodeInfoCompat#getBoundsInParent} to automatically
 * update the following properties:
 * <ul>
 * <li>{@link AccessibilityNodeInfoCompat#setVisibleToUser}
 * <li>{@link AccessibilityNodeInfoCompat#setBoundsInParent}
 * </ul>
 *
 * @param virtualViewId The virtual view id for item for which to construct
 *            a node.
 * @return An {@link AccessibilityNodeInfoCompat} for the specified item.
 */
private AccessibilityNodeInfoCompat createNodeForChild(int virtualViewId) {
    final AccessibilityNodeInfoCompat node = AccessibilityNodeInfoCompat.obtain();

    // Ensure the client has good defaults.
    node.setEnabled(true);
    node.setClassName(DEFAULT_CLASS_NAME);

    // Allow the client to populate the node.
    onPopulateNodeForVirtualView(virtualViewId, node);

    // Make sure the developer is following the rules.
    if ((node.getText() == null) && (node.getContentDescription() == null)) {
        throw new RuntimeException("Callbacks must add text or a content description in "
                + "populateNodeForVirtualViewId()");
    }

    node.getBoundsInParent(mTempParentRect);
    if (mTempParentRect.isEmpty()) {
        throw new RuntimeException("Callbacks must set parent bounds in "
                + "populateNodeForVirtualViewId()");
    }

    final int actions = node.getActions();
    if ((actions & AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS) != 0) {
        throw new RuntimeException("Callbacks must not add ACTION_ACCESSIBILITY_FOCUS in "
                + "populateNodeForVirtualViewId()");
    }
    if ((actions & AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS) != 0) {
        throw new RuntimeException("Callbacks must not add ACTION_CLEAR_ACCESSIBILITY_FOCUS in "
                + "populateNodeForVirtualViewId()");
    }

    // Don't allow the client to override these properties.
    node.setPackageName(mView.getContext().getPackageName());
    node.setSource(mView, virtualViewId);
    node.setParent(mView);

    // Manage internal accessibility focus state.
    if (mFocusedVirtualViewId == virtualViewId) {
        node.setAccessibilityFocused(true);
        node.addAction(AccessibilityNodeInfoCompat.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    } else {
        node.setAccessibilityFocused(false);
        node.addAction(AccessibilityNodeInfoCompat.ACTION_ACCESSIBILITY_FOCUS);
    }

    // Set the visibility based on the parent bound.
    if (intersectVisibleToUser(mTempParentRect)) {
        node.setVisibleToUser(true);
        node.setBoundsInParent(mTempParentRect);
    }

    // Calculate screen-relative bound.
    mView.getLocationOnScreen(mTempGlobalRect);
    final int offsetX = mTempGlobalRect[0];
    final int offsetY = mTempGlobalRect[1];
    mTempScreenRect.set(mTempParentRect);
    mTempScreenRect.offset(offsetX, offsetY);
    node.setBoundsInScreen(mTempScreenRect);

    return node;
}