android.view.accessibility.AccessibilityNodeInfo#setFocused ( )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(AccessibilityNodeInfo dest, AccessibilityNodeInfo 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());
}
 

@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info)
{
    super.onInitializeAccessibilityNodeInfo(host, info);

    @Nullable final Package viewPackage = PromptView.this.getClass().getPackage();
    if (viewPackage != null)
    {
        info.setPackageName(viewPackage.getName());
    }
    info.setSource(host);
    info.setClickable(true);
    info.setEnabled(true);
    info.setChecked(false);
    info.setFocusable(true);
    info.setFocused(true);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1)
    {
        info.setLabelFor(mPromptOptions.getTargetView());
    }

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)
    {
        info.setDismissable(true);
    }

    info.setContentDescription(mPromptOptions.getContentDescription());
    info.setText(mPromptOptions.getContentDescription());
}
 

@CalledByNative
private void setAccessibilityNodeInfoBooleanAttributes(AccessibilityNodeInfo node,
        int virtualViewId,
        boolean checkable, boolean checked, boolean clickable,
        boolean enabled, boolean focusable, boolean focused, boolean password,
        boolean scrollable, boolean selected, boolean visibleToUser) {
    node.setCheckable(checkable);
    node.setChecked(checked);
    node.setClickable(clickable);
    node.setEnabled(enabled);
    node.setFocusable(focusable);
    node.setFocused(focused);
    node.setPassword(password);
    node.setScrollable(scrollable);
    node.setSelected(selected);
    node.setVisibleToUser(visibleToUser);

    node.setMovementGranularities(
            AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER
            | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD
            | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_LINE);

    if (mAccessibilityFocusId == virtualViewId) {
        node.setAccessibilityFocused(true);
    } else {
        node.setAccessibilityFocused(false);
    }
}
 

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
@Override
public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {
	if (CAN_HIDE_DESCENDANTS) {
		super.onInitializeAccessibilityNodeInfo(host, info);
	} else {
		// Obtain a node for the host, then manually generate the list
		// of children to only include non-obscured views.
		final AccessibilityNodeInfo superNode = AccessibilityNodeInfo.obtain(info);
		super.onInitializeAccessibilityNodeInfo(host, superNode);

		info.setSource(host);
		final ViewParent parent = host.getParentForAccessibility();
		if (parent instanceof View) {
			info.setParent((View) parent);
		}
		copyNodeInfoNoChildren(info, superNode);
		superNode.recycle();

		addChildrenForAccessibility(info, (ViewGroup) host);
	}

	info.setClassName(DrawerLayout.class.getName());

	// This view reports itself as focusable so that it can intercept
	// the back button, but we should prevent this view from reporting
	// itself as focusable to accessibility services.
	info.setFocusable(false);
	info.setFocused(false);
	if (C.API_LOLLIPOP) {
		info.removeAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_FOCUS);
		info.removeAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_CLEAR_FOCUS);
	}
}
 

@CalledByNative
private void setAccessibilityNodeInfoBooleanAttributes(AccessibilityNodeInfo node,
        int virtualViewId, boolean checkable, boolean checked, boolean clickable,
        boolean enabled, boolean focusable, boolean focused, boolean password,
        boolean scrollable, boolean selected, boolean visibleToUser) {
    node.setCheckable(checkable);
    node.setChecked(checked);
    node.setClickable(clickable);
    node.setEnabled(enabled);
    node.setFocusable(focusable);
    node.setFocused(focused);
    node.setPassword(password);
    node.setScrollable(scrollable);
    node.setSelected(selected);
    node.setVisibleToUser(visibleToUser);

    if (focusable) {
        if (focused) {
            node.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS);
        } else {
            node.addAction(AccessibilityNodeInfo.ACTION_FOCUS);
        }
    }

    if (mAccessibilityFocusId == virtualViewId) {
        node.setAccessibilityFocused(true);
        node.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    } else {
        node.setAccessibilityFocused(false);
        node.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }

    if (clickable) {
        node.addAction(AccessibilityNodeInfo.ACTION_CLICK);
    }
}
 

@CalledByNative
private void setAccessibilityNodeInfoBooleanAttributes(AccessibilityNodeInfo node,
        int virtualViewId, boolean checkable, boolean checked, boolean clickable,
        boolean enabled, boolean focusable, boolean focused, boolean password,
        boolean scrollable, boolean selected, boolean visibleToUser) {
    node.setCheckable(checkable);
    node.setChecked(checked);
    node.setClickable(clickable);
    node.setEnabled(enabled);
    node.setFocusable(focusable);
    node.setFocused(focused);
    node.setPassword(password);
    node.setScrollable(scrollable);
    node.setSelected(selected);
    node.setVisibleToUser(visibleToUser);

    if (focusable) {
        if (focused) {
            node.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS);
        } else {
            node.addAction(AccessibilityNodeInfo.ACTION_FOCUS);
        }
    }

    if (mAccessibilityFocusId == virtualViewId) {
        node.setAccessibilityFocused(true);
        node.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    } else {
        node.setAccessibilityFocused(false);
        node.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }

    if (clickable) {
        node.addAction(AccessibilityNodeInfo.ACTION_CLICK);
    }
}