Java Code Examples for android.view.accessibility.AccessibilityNodeInfo#setBoundsInScreen()

/**
 * 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());
}
 

private AccessibilityNodeInfo createAccessibiltyNodeInfoForInputText(
        int left, int top, int right, int bottom) {
    AccessibilityNodeInfo info = mInputText.createAccessibilityNodeInfo();
    info.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT);
    if (mAccessibilityFocusedView != VIRTUAL_VIEW_ID_INPUT) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == VIRTUAL_VIEW_ID_INPUT) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    info.setVisibleToUser(isVisibleToUser(boundsInParent));
    info.setBoundsInParent(boundsInParent);
    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);
    return info;
}
 

protected AccessibilityNodeInfo provideAccessibilityNodeInfo(View parent, Context context) {
    final AccessibilityNodeInfo node = AccessibilityNodeInfo.obtain();
    node.setSource(parent, id);
    node.setPackageName(context.getPackageName());
    node.setClassName(getClassName());
    node.setEditable(editable);
    node.setViewIdResourceName(idEntry);
    node.setVisibleToUser(true);
    final Rect absBounds = line.getAbsCoordinates();
    if (absBounds != null) {
        node.setBoundsInScreen(absBounds);
    }
    if (TextUtils.getTrimmedLength(text) > 0) {
        // TODO: Must checked trimmed length because input fields use 8 empty spaces to
        // set width
        node.setText(text);
    }
    return node;
}
 

protected AccessibilityNodeInfo provideAccessibilityNodeInfo(View parent, Context context) {
    final AccessibilityNodeInfo node = AccessibilityNodeInfo.obtain();
    node.setSource(parent, id);
    node.setPackageName(context.getPackageName());
    node.setClassName(getClassName());
    node.setEditable(editable);
    node.setViewIdResourceName(idEntry);
    node.setVisibleToUser(true);
    final Rect absBounds = line.getAbsCoordinates();
    if (absBounds != null) {
        node.setBoundsInScreen(absBounds);
    }
    if (TextUtils.getTrimmedLength(text) > 0) {
        // TODO: Must checked trimmed length because input fields use 8 empty spaces to
        // set width
        node.setText(text);
    }
    return node;
}
 

private AccessibilityNodeInfo createAccessibiltyNodeInfoForInputText(
        int left, int top, int right, int bottom) {
    AccessibilityNodeInfo info = mInputText.createAccessibilityNodeInfo();
    info.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT);
    if (mAccessibilityFocusedView != VIRTUAL_VIEW_ID_INPUT) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == VIRTUAL_VIEW_ID_INPUT) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    // info.setVisibleToUser(isVisibleToUser(boundsInParent));
    info.setBoundsInParent(boundsInParent);
    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);
    return info;
}
 

private AccessibilityNodeInfo createAccessibiltyNodeInfoForInputText(
        int left, int top, int right, int bottom) {
    AccessibilityNodeInfo info = mInputText.createAccessibilityNodeInfo();
    info.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT);
    if (mAccessibilityFocusedView != VIRTUAL_VIEW_ID_INPUT) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == VIRTUAL_VIEW_ID_INPUT) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    info.setVisibleToUser(getVisibility() == View.VISIBLE);
    info.setBoundsInParent(boundsInParent);
    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);
    return info;
}
 

@CalledByNative
private void setAccessibilityNodeInfoLocation(AccessibilityNodeInfo node,
        int absoluteLeft, int absoluteTop, int parentRelativeLeft, int parentRelativeTop,
        int width, int height, boolean isRootNode) {
    // First set the bounds in parent.
    Rect boundsInParent = new Rect(parentRelativeLeft, parentRelativeTop,
            parentRelativeLeft + width, parentRelativeTop + height);
    if (isRootNode) {
        // Offset of the web content relative to the View.
        boundsInParent.offset(0, (int) mRenderCoordinates.getContentOffsetYPix());
    }
    node.setBoundsInParent(boundsInParent);

    // Now set the absolute rect, which requires several transformations.
    Rect rect = new Rect(absoluteLeft, absoluteTop, absoluteLeft + width, absoluteTop + height);

    // Offset by the scroll position.
    rect.offset(-(int) mRenderCoordinates.getScrollX(),
                -(int) mRenderCoordinates.getScrollY());

    // Convert CSS (web) pixels to Android View pixels
    rect.left = (int) mRenderCoordinates.fromLocalCssToPix(rect.left);
    rect.top = (int) mRenderCoordinates.fromLocalCssToPix(rect.top);
    rect.bottom = (int) mRenderCoordinates.fromLocalCssToPix(rect.bottom);
    rect.right = (int) mRenderCoordinates.fromLocalCssToPix(rect.right);

    // Offset by the location of the web content within the view.
    rect.offset(0,
                (int) mRenderCoordinates.getContentOffsetYPix());

    // Finally offset by the location of the view within the screen.
    final int[] viewLocation = new int[2];
    mView.getLocationOnScreen(viewLocation);
    rect.offset(viewLocation[0], viewLocation[1]);

    node.setBoundsInScreen(rect);
}
 

@CalledByNative
private void setAccessibilityNodeInfoLocation(AccessibilityNodeInfo node,
        int absoluteLeft, int absoluteTop, int parentRelativeLeft, int parentRelativeTop,
        int width, int height, boolean isRootNode) {
    // First set the bounds in parent.
    Rect boundsInParent = new Rect(parentRelativeLeft, parentRelativeTop,
            parentRelativeLeft + width, parentRelativeTop + height);
    if (isRootNode) {
        // Offset of the web content relative to the View.
        boundsInParent.offset(0, (int) mRenderCoordinates.getContentOffsetYPix());
    }
    node.setBoundsInParent(boundsInParent);

    // Now set the absolute rect, which requires several transformations.
    Rect rect = new Rect(absoluteLeft, absoluteTop, absoluteLeft + width, absoluteTop + height);

    // Offset by the scroll position.
    rect.offset(-(int) mRenderCoordinates.getScrollX(),
                -(int) mRenderCoordinates.getScrollY());

    // Convert CSS (web) pixels to Android View pixels
    rect.left = (int) mRenderCoordinates.fromLocalCssToPix(rect.left);
    rect.top = (int) mRenderCoordinates.fromLocalCssToPix(rect.top);
    rect.bottom = (int) mRenderCoordinates.fromLocalCssToPix(rect.bottom);
    rect.right = (int) mRenderCoordinates.fromLocalCssToPix(rect.right);

    // Offset by the location of the web content within the view.
    rect.offset(0,
                (int) mRenderCoordinates.getContentOffsetYPix());

    // Finally offset by the location of the view within the screen.
    final int[] viewLocation = new int[2];
    mView.getLocationOnScreen(viewLocation);
    rect.offset(viewLocation[0], viewLocation[1]);

    node.setBoundsInScreen(rect);
}
 

private AccessibilityNodeInfo createAccessibilityNodeInfoForVirtualButton(int virtualViewId,
        String text, int left, int top, int right, int bottom) {
    AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain();
    info.setClassName(Button.class.getName());
    info.setPackageName(getContext().getPackageName());
    info.setSource(NumberPicker.this, virtualViewId);
    info.setParent(NumberPicker.this);
    info.setText(text);
    info.setClickable(true);
    info.setLongClickable(true);
    info.setEnabled(NumberPicker.this.isEnabled());
    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    // TODO info.setVisibleToUser(isVisibleToUser(boundsInParent));
    info.setBoundsInParent(boundsInParent);
    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);

    if (mAccessibilityFocusedView != virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    if (NumberPicker.this.isEnabled()) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLICK);
    }

    return info;
}
 

private AccessibilityNodeInfo createNodeForHost(int rootId) {
    // 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 AccessibilityNodeInfo result = AccessibilityNodeInfo.obtain(mView);
    final AccessibilityNodeInfo source = AccessibilityNodeInfo.obtain(mView);
    mView.onInitializeAccessibilityNodeInfo(source);

    // Copy over parent and screen bounds.
    Rect rect = new Rect();
    source.getBoundsInParent(rect);
    result.setBoundsInParent(rect);
    source.getBoundsInScreen(rect);
    result.setBoundsInScreen(rect);

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

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

    // Add the Chrome root node.
    if (isFrameInfoInitialized()) {
        result.addChild(mView, rootId);
    }

    return result;
}
 

private AccessibilityNodeInfo createAccessibilityNodeInfoForVirtualButton(int virtualViewId,
                                                                          String text, int left, int top, int right, int bottom) {
    AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain();
    info.setClassName(Button.class.getName());
    info.setPackageName(getContext().getPackageName());
    info.setSource(TextPicker.this, virtualViewId);
    info.setParent(TextPicker.this);
    info.setText(text);
    info.setClickable(true);
    info.setLongClickable(true);
    info.setEnabled(TextPicker.this.isEnabled());
    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    // TODO info.setVisibleToUser(isVisibleToUser(boundsInParent));
    info.setBoundsInParent(boundsInParent);
    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);

    if (mAccessibilityFocusedView != virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    if (TextPicker.this.isEnabled()) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLICK);
    }

    return info;
}
 

private AccessibilityNodeInfo createAccessibilityNodeInfoForVirtualButton(int virtualViewId,
        String text, int left, int top, int right, int bottom) {
    AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain();
    info.setClassName(Button.class.getName());
    info.setPackageName(getContext().getPackageName());
    info.setSource(NumberPicker.this, virtualViewId);
    info.setParent(NumberPicker.this);
    info.setText(text);
    info.setClickable(true);
    info.setLongClickable(true);
    info.setEnabled(NumberPicker.this.isEnabled());
    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    info.setVisibleToUser(getVisibility() == View.VISIBLE);
    info.setBoundsInParent(boundsInParent);
    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);

    if (mAccessibilityFocusedView != virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    if (NumberPicker.this.isEnabled()) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLICK);
    }

    return info;
}
 

private AccessibilityNodeInfo createAccessibilityNodeInfoForVirtualButton(int virtualViewId,
        String text, int left, int top, int right, int bottom) {
    AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain();
    info.setClassName(Button.class.getName());
    info.setPackageName(getContext().getPackageName());
    info.setSource(NumberPicker.this, virtualViewId);
    info.setParent(NumberPicker.this);
    info.setText(text);
    info.setClickable(true);
    info.setLongClickable(true);
    info.setEnabled(NumberPicker.this.isEnabled());
    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    // info.setVisibleToUser(isVisibleToUser(boundsInParent));
    info.setBoundsInParent(boundsInParent);
    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);

    if (mAccessibilityFocusedView != virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    if (NumberPicker.this.isEnabled()) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLICK);
    }

    return info;
}
 

private AccessibilityNodeInfo createAccessibilityNodeInfoForVirtualButton(int virtualViewId,
        String text, int left, int top, int right, int bottom) {
    AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain();
    info.setClassName(Button.class.getName());
    info.setPackageName(mContext.getPackageName());
    info.setSource(NumberPicker.this, virtualViewId);
    info.setParent(NumberPicker.this);
    info.setText(text);
    info.setClickable(true);
    info.setLongClickable(true);
    info.setEnabled(NumberPicker.this.isEnabled());
    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    info.setVisibleToUser(isVisibleToUser(boundsInParent));
    info.setBoundsInParent(boundsInParent);
    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);

    if (mAccessibilityFocusedView != virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == virtualViewId) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    if (NumberPicker.this.isEnabled()) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLICK);
    }

    return info;
}
 

private AccessibilityNodeInfo createAccessibilityNodeInfoForNumberPicker(int left, int top,
        int right, int bottom) {
    AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain();
    info.setClassName(NumberPicker.class.getName());
    info.setPackageName(getContext().getPackageName());
    info.setSource(NumberPicker.this);

    if (hasVirtualDecrementButton()) {
        info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_DECREMENT);
    }
    info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT);
    if (hasVirtualIncrementButton()) {
        info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_INCREMENT);
    }

    info.setParent((View) getParentForAccessibility());
    info.setEnabled(NumberPicker.this.isEnabled());
    info.setScrollable(true);

    Rect boundsInParent = mTempRect;

    boundsInParent.set(left, top, right, bottom);
    info.setBoundsInParent(boundsInParent);

    info.setVisibleToUser(getVisibility() == View.VISIBLE);

    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    info.setBoundsInScreen(boundsInScreen);

    if (mAccessibilityFocusedView != View.NO_ID) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == View.NO_ID) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    if (NumberPicker.this.isEnabled()) {
        if (getWrapSelectorWheel() || getValue() < getMaxValue()) {
            info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
        }
        if (getWrapSelectorWheel() || getValue() > getMinValue()) {
            info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
        }
    }

    return info;
}
 

@CalledByNative
private void setAccessibilityNodeInfoLocation(AccessibilityNodeInfo node,
        final int virtualViewId,
        int absoluteLeft, int absoluteTop, int parentRelativeLeft, int parentRelativeTop,
        int width, int height, boolean isRootNode) {
    // First set the bounds in parent.
    Rect boundsInParent = new Rect(parentRelativeLeft, parentRelativeTop,
            parentRelativeLeft + width, parentRelativeTop + height);
    if (isRootNode) {
        // Offset of the web content relative to the View.
        boundsInParent.offset(0, (int) mRenderCoordinates.getContentOffsetYPix());
    }
    node.setBoundsInParent(boundsInParent);

    // Now set the absolute rect, which requires several transformations.
    Rect rect = new Rect(absoluteLeft, absoluteTop, absoluteLeft + width, absoluteTop + height);

    // Offset by the scroll position.
    rect.offset(-(int) mRenderCoordinates.getScrollX(),
                -(int) mRenderCoordinates.getScrollY());

    // Convert CSS (web) pixels to Android View pixels
    rect.left = (int) mRenderCoordinates.fromLocalCssToPix(rect.left);
    rect.top = (int) mRenderCoordinates.fromLocalCssToPix(rect.top);
    rect.bottom = (int) mRenderCoordinates.fromLocalCssToPix(rect.bottom);
    rect.right = (int) mRenderCoordinates.fromLocalCssToPix(rect.right);

    // Offset by the location of the web content within the view.
    rect.offset(0,
                (int) mRenderCoordinates.getContentOffsetYPix());

    // Finally offset by the location of the view within the screen.
    final int[] viewLocation = new int[2];
    mView.getLocationOnScreen(viewLocation);
    rect.offset(viewLocation[0], viewLocation[1]);

    // Clip the node's bounding rect to the viewport bounds.
    int viewportRectTop = viewLocation[1] + (int) mRenderCoordinates.getContentOffsetYPix();
    int viewportRectBottom = viewportRectTop + mContentViewCore.getViewportHeightPix();
    if (rect.top < viewportRectTop) rect.top = viewportRectTop;
    if (rect.bottom > viewportRectBottom) rect.bottom = viewportRectBottom;

    node.setBoundsInScreen(rect);

    // Work around a bug in the Android framework where if the object with accessibility
    // focus moves, the accessibility focus rect is not updated - both the visual highlight,
    // and the location on the screen that's clicked if you double-tap. To work around this,
    // when we know the object with accessibility focus moved, move focus away and then
    // move focus right back to it, which tricks Android into updating its bounds.
    if (virtualViewId == mAccessibilityFocusId && virtualViewId != mCurrentRootId) {
        if (mAccessibilityFocusRect == null) {
            mAccessibilityFocusRect = rect;
        } else if (!mAccessibilityFocusRect.equals(rect)) {
            mAccessibilityFocusRect = rect;
            moveAccessibilityFocusToIdAndRefocusIfNeeded(virtualViewId);
        }
    }
}
 

@Override
public AccessibilityNodeInfo createAccessibilityNodeInfo(int thumbId) {
    AccessibilityNodeInfo info = null;
    if (thumbId == View.NO_ID) {
        // We are requested to create an AccessibilityNodeInfo describing
        // this View, i.e. the root of the virtual sub-tree. Note that the
        // host View has an AccessibilityNodeProvider which means that this
        // provider is responsible for creating the node info for that root.
        info = AccessibilityNodeInfo.obtain(MultiSlider.this);
        onInitializeAccessibilityNodeInfo(info);
        // Add the virtual children of the root View.
        final int childCount = mThumbs.size();
        for (int i = 0; i < childCount; i++) {
            info.addChild(MultiSlider.this, i);
        }
        if (mThumbs.size() == 1) {
            info.setScrollable(true);
            if (Build.VERSION.SDK_INT >= 21) {
                info.addAction(ACTION_SET_PROGRESS);
                info.addAction(ACTION_SCROLL_BACKWARD);
                info.addAction(ACTION_SCROLL_FORWARD);
            } else {
                info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
                info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
            }

        }

    } else {
        // Find the view that corresponds to the given id.
        Thumb thumb = mThumbs.get(thumbId);
        if (thumb == null) {
            return null;
        }
        // Obtain and initialize an AccessibilityNodeInfo with
        // information about the virtual view.
        info = AccessibilityNodeInfo.obtain(MultiSlider.this, thumbId);
        info.setClassName(thumb.getClass().getName());
        info.setParent(MultiSlider.this);
        info.setSource(MultiSlider.this, thumbId);
        info.setContentDescription("Multi-Slider thumb no:" + thumbId);

        if (Build.VERSION.SDK_INT >= 21) {
            info.addAction(ACTION_SET_PROGRESS);
            if (thumb.getPossibleMax() > thumb.value) {
                info.addAction(ACTION_SCROLL_BACKWARD);
            }
            if (thumb.getPossibleMax() > thumb.value) {
                info.addAction(ACTION_SCROLL_FORWARD);
            }

        } else {
            if (thumb.getPossibleMin() > thumb.value) {
                info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
            }
            if (thumb.getPossibleMax() > thumb.value) {
                info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
            }
        }


        if (thumb.getThumb() != null) {
            int[] loc = new int[2];
            getLocationOnScreen(loc);
            Rect rect = thumb.getThumb().copyBounds();
            rect.top += loc[1];
            rect.left += loc[0];
            rect.right += loc[0];
            rect.bottom += loc[1];
            info.setBoundsInScreen(rect);
            //TODO somehow this resuls in [0,0][0,0]. wonder check why
            //info.setBoundsInParent(rect);

        }

        info.setText(thumb.tag + ": " + thumb.value);
        info.setEnabled(thumb.isEnabled());
        if (Build.VERSION.SDK_INT >= 24) {
            info.setImportantForAccessibility(true);
        }
        info.setVisibleToUser(true);
        info.setScrollable(true);
    }
    return info;
}
 

private AccessibilityNodeInfo createAccessibilityNodeInfoForNumberPicker(int left, int top,
        int right, int bottom) {
    AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain();
    info.setClassName(NumberPicker.class.getName());
    info.setPackageName(mContext.getPackageName());
    info.setSource(NumberPicker.this);

    if (hasVirtualDecrementButton()) {
        info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_DECREMENT);
    }
    info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT);
    if (hasVirtualIncrementButton()) {
        info.addChild(NumberPicker.this, VIRTUAL_VIEW_ID_INCREMENT);
    }

    info.setParent((View) getParentForAccessibility());
    info.setEnabled(NumberPicker.this.isEnabled());
    info.setScrollable(true);

    final float applicationScale =
        getContext().getResources().getCompatibilityInfo().applicationScale;

    Rect boundsInParent = mTempRect;
    boundsInParent.set(left, top, right, bottom);
    boundsInParent.scale(applicationScale);
    info.setBoundsInParent(boundsInParent);

    info.setVisibleToUser(isVisibleToUser());

    Rect boundsInScreen = boundsInParent;
    int[] locationOnScreen = mTempArray;
    getLocationOnScreen(locationOnScreen);
    boundsInScreen.offset(locationOnScreen[0], locationOnScreen[1]);
    boundsInScreen.scale(applicationScale);
    info.setBoundsInScreen(boundsInScreen);

    if (mAccessibilityFocusedView != View.NO_ID) {
        info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    }
    if (mAccessibilityFocusedView == View.NO_ID) {
        info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS);
    }
    if (NumberPicker.this.isEnabled()) {
        if (getWrapSelectorWheel() || getValue() < getMaxValue()) {
            info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
        }
        if (getWrapSelectorWheel() || getValue() > getMinValue()) {
            info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
        }
    }

    return info;
}