Java Code Examples for androidx.core.view.ViewCompat#IMPORTANT_FOR_ACCESSIBILITY_AUTO

@OnPopulateAccessibilityNode
static void onPopulateAccessibilityNode(
    View host,
    AccessibilityNodeInfoCompat node,
    @Prop(resType = ResType.STRING) CharSequence text,
    @Prop(optional = true, resType = ResType.BOOL) boolean isSingleLine) {
  if (ViewCompat.getImportantForAccessibility(host)
      == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
    ViewCompat.setImportantForAccessibility(host, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
  }
  CharSequence contentDescription = node.getContentDescription();
  node.setText(contentDescription != null ? contentDescription : text);
  node.setContentDescription(contentDescription != null ? contentDescription : text);

  node.addAction(AccessibilityNodeInfoCompat.ACTION_NEXT_AT_MOVEMENT_GRANULARITY);
  node.addAction(AccessibilityNodeInfoCompat.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY);
  node.setMovementGranularities(
      AccessibilityNodeInfoCompat.MOVEMENT_GRANULARITY_CHARACTER
          | AccessibilityNodeInfoCompat.MOVEMENT_GRANULARITY_WORD
          | AccessibilityNodeInfoCompat.MOVEMENT_GRANULARITY_PARAGRAPH);

  if (!isSingleLine) {
    node.setMultiLine(true);
  }
}
 

/**
 * Host views implement their own content description handling instead of just delegating to the
 * underlying view framework for performance reasons as the framework sets/resets content
 * description very frequently on host views and the underlying accessibility notifications might
 * cause performance issues. This is safe to do because the framework owns the accessibility state
 * and knows how to update it efficiently.
 */
@Override
public void setContentDescription(CharSequence contentDescription) {
  mContentDescription = contentDescription;

  if (!TextUtils.isEmpty(contentDescription)
      && ViewCompat.getImportantForAccessibility(this)
          == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
    ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
  }

  maybeInvalidateAccessibilityState();
}
 

void initViewPager() {
    setWillNotDraw(false);
    setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
    setFocusable(true);
    final Context context = getContext();
    mScroller = new Scroller(context, sInterpolator);
    final ViewConfiguration configuration = ViewConfiguration.get(context);
    final float density = context.getResources().getDisplayMetrics().density;

    mTouchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(configuration);
    mMinimumVelocity = (int) (MIN_FLING_VELOCITY * density);
    mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
    mTopEdge = new EdgeEffectCompat(context);
    mBottomEdge = new EdgeEffectCompat(context);

    mFlingDistance = (int) (MIN_DISTANCE_FOR_FLING * density);
    mCloseEnough = (int) (CLOSE_ENOUGH * density);
    mDefaultGutterSize = (int) (DEFAULT_GUTTER_SIZE * density);

    ViewCompat.setAccessibilityDelegate(this, new MyAccessibilityDelegate());

    if (ViewCompat.getImportantForAccessibility(this)
            == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        ViewCompat.setImportantForAccessibility(this,
                ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
}
 

@Override
public boolean onLayoutChild(
    @NonNull CoordinatorLayout parent, @NonNull V child, int layoutDirection) {
  boolean handled = super.onLayoutChild(parent, child, layoutDirection);
  if (ViewCompat.getImportantForAccessibility(child)
      == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
    ViewCompat.setImportantForAccessibility(child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    updateAccessibilityActions(child);
  }
  return handled;
}
 

void initSliderPager() {
    setWillNotDraw(false);
    setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
    setFocusable(true);
    final Context context = getContext();
    mScroller = new OwnScroller(context, DEFAULT_SCROLL_DURATION, sInterpolator);
    final ViewConfiguration configuration = ViewConfiguration.get(context);
    final float density = context.getResources().getDisplayMetrics().density;

    mTouchSlop = configuration.getScaledPagingTouchSlop();
    mMinimumVelocity = (int) (MIN_FLING_VELOCITY * density);
    mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
    mLeftEdge = new EdgeEffect(context);
    mRightEdge = new EdgeEffect(context);

    mFlingDistance = (int) (MIN_DISTANCE_FOR_FLING * density);
    mCloseEnough = (int) (CLOSE_ENOUGH * density);
    mDefaultGutterSize = (int) (DEFAULT_GUTTER_SIZE * density);

    ViewCompat.setAccessibilityDelegate(this, new MyAccessibilityDelegate());

    if (ViewCompat.getImportantForAccessibility(this)
            == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        ViewCompat.setImportantForAccessibility(this,
                ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }

    ViewCompat.setOnApplyWindowInsetsListener(this,
            new androidx.core.view.OnApplyWindowInsetsListener() {
                private final Rect mTempRect = new Rect();

                @Override
                public WindowInsetsCompat onApplyWindowInsets(final View v,
                                                              final WindowInsetsCompat originalInsets) {
                    // First let the SliderPager itself try and consume them...
                    final WindowInsetsCompat applied =
                            ViewCompat.onApplyWindowInsets(v, originalInsets);
                    if (applied.isConsumed()) {
                        // If the SliderPager consumed all insets, return now
                        return applied;
                    }

                    // Now we'll manually dispatch the insets to our children. Since SliderPager
                    // children are always full-height, we do not want to use the standard
                    // ViewGroup dispatchApplyWindowInsets since if child 0 consumes them,
                    // the rest of the children will not receive any insets. To workaround this
                    // we manually dispatch the applied insets, not allowing children to
                    // consume them from each other. We do however keep track of any insets
                    // which are consumed, returning the union of our children's consumption
                    final Rect res = mTempRect;
                    res.left = applied.getSystemWindowInsetLeft();
                    res.top = applied.getSystemWindowInsetTop();
                    res.right = applied.getSystemWindowInsetRight();
                    res.bottom = applied.getSystemWindowInsetBottom();

                    for (int i = 0, count = getChildCount(); i < count; i++) {
                        final WindowInsetsCompat childInsets = ViewCompat
                                .dispatchApplyWindowInsets(getChildAt(i), applied);
                        // Now keep track of any consumed by tracking each dimension's min
                        // value
                        res.left = Math.min(childInsets.getSystemWindowInsetLeft(),
                                res.left);
                        res.top = Math.min(childInsets.getSystemWindowInsetTop(),
                                res.top);
                        res.right = Math.min(childInsets.getSystemWindowInsetRight(),
                                res.right);
                        res.bottom = Math.min(childInsets.getSystemWindowInsetBottom(),
                                res.bottom);
                    }

                    // Now return a new WindowInsets, using the consumed window insets
                    return applied.replaceSystemWindowInsets(
                            res.left, res.top, res.right, res.bottom);
                }
            });
}
 

@Override
public boolean isImportantForAccessibilityIsSet() {
  return (mPrivateFlags & PFLAG_IMPORTANT_FOR_ACCESSIBILITY_IS_SET) == 0L
      || mImportantForAccessibility == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO;
}
 

public RadialTimePickerView(
        Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)  {
    super(context, attrs);

    applyAttributes(attrs, defStyleAttr, defStyleRes);

    // Pull disabled alpha from theme.
    final TypedValue outValue = new TypedValue();
    context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, outValue, true);
    mDisabledAlpha = outValue.getFloat();

    mTypeface = Typeface.create("sans-serif", Typeface.NORMAL);

    mPaint[HOURS] = new Paint();
    mPaint[HOURS].setAntiAlias(true);
    mPaint[HOURS].setTextAlign(Paint.Align.CENTER);

    mPaint[MINUTES] = new Paint();
    mPaint[MINUTES].setAntiAlias(true);
    mPaint[MINUTES].setTextAlign(Paint.Align.CENTER);

    mPaintCenter.setAntiAlias(true);

    mPaintSelector[SELECTOR_CIRCLE] = new Paint();
    mPaintSelector[SELECTOR_CIRCLE].setAntiAlias(true);

    mPaintSelector[SELECTOR_DOT] = new Paint();
    mPaintSelector[SELECTOR_DOT].setAntiAlias(true);

    mPaintSelector[SELECTOR_LINE] = new Paint();
    mPaintSelector[SELECTOR_LINE].setAntiAlias(true);
    mPaintSelector[SELECTOR_LINE].setStrokeWidth(2);

    mPaintBackground.setAntiAlias(true);

    final Resources res = getResources();
    mSelectorRadius = res.getDimensionPixelSize(R.dimen.timepicker_selector_radius);
    mSelectorStroke = res.getDimensionPixelSize(R.dimen.timepicker_selector_stroke);
    mSelectorDotRadius = res.getDimensionPixelSize(R.dimen.timepicker_selector_dot_radius);
    mCenterDotRadius = res.getDimensionPixelSize(R.dimen.timepicker_center_dot_radius);

    mTextSize[HOURS] = res.getDimensionPixelSize(R.dimen.timepicker_text_size_normal);
    mTextSize[MINUTES] = res.getDimensionPixelSize(R.dimen.timepicker_text_size_normal);
    mTextSize[HOURS_INNER] = res.getDimensionPixelSize(R.dimen.timepicker_text_size_inner);

    mTextInset[HOURS] = res.getDimensionPixelSize(R.dimen.timepicker_text_inset_normal);
    mTextInset[MINUTES] = res.getDimensionPixelSize(R.dimen.timepicker_text_inset_normal);
    mTextInset[HOURS_INNER] = res.getDimensionPixelSize(R.dimen.timepicker_text_inset_inner);

    mShowHours = true;
    mHoursToMinutes = HOURS;
    mIs24HourMode = false;
    mAmOrPm = AM;

    // Set up accessibility components.
    mTouchHelper = new RadialPickerTouchHelper();
    ViewCompat.setAccessibilityDelegate(this, mTouchHelper);
    //setAccessibilityDelegate(mTouchHelper);

    if(ViewCompat.getImportantForAccessibility(this) == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO){
        ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
    /*if (getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES);
    }*/

    initHoursAndMinutesText();
    initData();

    // Initial values
    final Calendar calendar = Calendar.getInstance(Locale.getDefault());
    final int currentHour = calendar.get(Calendar.HOUR_OF_DAY);
    final int currentMinute = calendar.get(Calendar.MINUTE);

    setCurrentHourInternal(currentHour, false, false);
    setCurrentMinuteInternal(currentMinute, false);

    setHapticFeedbackEnabled(true);
}
 

void initViewPager() {
    setWillNotDraw(false);
    setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
    setFocusable(true);
    final Context context = getContext();
    mScroller = new Scroller(context, sInterpolator);
    final ViewConfiguration configuration = ViewConfiguration.get(context);
    final float density = context.getResources().getDisplayMetrics().density;

    mTouchSlop = configuration.getScaledPagingTouchSlop();
    mMinimumVelocity = (int) (MIN_FLING_VELOCITY * density);
    mMaximumVelocity = configuration.getScaledMaximumFlingVelocity();
    mLeftEdge = new EdgeEffectCompat(context);
    mRightEdge = new EdgeEffectCompat(context);

    mFlingDistance = (int) (MIN_DISTANCE_FOR_FLING * density);
    mCloseEnough = (int) (CLOSE_ENOUGH * density);
    mDefaultGutterSize = (int) (DEFAULT_GUTTER_SIZE * density);

    ViewCompat.setAccessibilityDelegate(this, new MyAccessibilityDelegate());

    if (ViewCompat.getImportantForAccessibility(this)
            == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
        ViewCompat.setImportantForAccessibility(this,
                ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }

    ViewCompat.setOnApplyWindowInsetsListener(this,
            new androidx.core.view.OnApplyWindowInsetsListener() {
                private final Rect mTempRect = new Rect();

                @Override
                public WindowInsetsCompat onApplyWindowInsets(final View v,
                                                              final WindowInsetsCompat originalInsets) {
                    // First let the ViewPager itself try and consume them...
                    final WindowInsetsCompat applied =
                            ViewCompat.onApplyWindowInsets(v, originalInsets);
                    if (applied.isConsumed()) {
                        // If the ViewPager consumed all insets, return now
                        return applied;
                    }

                    // Now we'll manually dispatch the insets to our children. Since ViewPager
                    // children are always full-height, we do not want to use the standard
                    // ViewGroup dispatchApplyWindowInsets since if child 0 consumes them,
                    // the rest of the children will not receive any insets. To workaround this
                    // we manually dispatch the applied insets, not allowing children to
                    // consume them from each other. We do however keep track of any insets
                    // which are consumed, returning the union of our children's consumption
                    final Rect res = mTempRect;
                    res.left = applied.getSystemWindowInsetLeft();
                    res.top = applied.getSystemWindowInsetTop();
                    res.right = applied.getSystemWindowInsetRight();
                    res.bottom = applied.getSystemWindowInsetBottom();

                    for (int i = 0, count = getChildCount(); i < count; i++) {
                        final WindowInsetsCompat childInsets = ViewCompat
                                .dispatchApplyWindowInsets(getChildAt(i), applied);
                        // Now keep track of any consumed by tracking each dimension's min
                        // value
                        res.left = Math.min(childInsets.getSystemWindowInsetLeft(),
                                res.left);
                        res.top = Math.min(childInsets.getSystemWindowInsetTop(),
                                res.top);
                        res.right = Math.min(childInsets.getSystemWindowInsetRight(),
                                res.right);
                        res.bottom = Math.min(childInsets.getSystemWindowInsetBottom(),
                                res.bottom);
                    }

                    // Now return a new WindowInsets, using the consumed window insets
                    return applied.replaceSystemWindowInsets(
                            res.left, res.top, res.right, res.bottom);
                }
            });
}
 

@Override
public boolean onLayoutChild(
    @NonNull CoordinatorLayout parent, @NonNull V child, int layoutDirection) {
  if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
    child.setFitsSystemWindows(true);
  }

  if (viewRef == null) {
    // First layout with this behavior.
    peekHeightMin =
        parent.getResources().getDimensionPixelSize(R.dimen.design_bottom_sheet_peek_height_min);
    setSystemGestureInsets(parent);
    viewRef = new WeakReference<>(child);
    // Only set MaterialShapeDrawable as background if shapeTheming is enabled, otherwise will
    // default to android:background declared in styles or layout.
    if (shapeThemingEnabled && materialShapeDrawable != null) {
      ViewCompat.setBackground(child, materialShapeDrawable);
    }
    // Set elevation on MaterialShapeDrawable
    if (materialShapeDrawable != null) {
      // Use elevation attr if set on bottomsheet; otherwise, use elevation of child view.
      materialShapeDrawable.setElevation(
          elevation == -1 ? ViewCompat.getElevation(child) : elevation);
      // Update the material shape based on initial state.
      isShapeExpanded = state == STATE_EXPANDED;
      materialShapeDrawable.setInterpolation(isShapeExpanded ? 0f : 1f);
    }
    updateAccessibilityActions();
    if (ViewCompat.getImportantForAccessibility(child)
        == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
      ViewCompat.setImportantForAccessibility(child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
  }
  if (viewDragHelper == null) {
    viewDragHelper = ViewDragHelper.create(parent, dragCallback);
  }

  int savedTop = child.getTop();
  // First let the parent lay it out
  parent.onLayoutChild(child, layoutDirection);
  // Offset the bottom sheet
  parentWidth = parent.getWidth();
  parentHeight = parent.getHeight();
  fitToContentsOffset = Math.max(0, parentHeight - child.getHeight());
  calculateHalfExpandedOffset();
  calculateCollapsedOffset();

  if (state == STATE_EXPANDED) {
    ViewCompat.offsetTopAndBottom(child, getExpandedOffset());
  } else if (state == STATE_HALF_EXPANDED) {
    ViewCompat.offsetTopAndBottom(child, halfExpandedOffset);
  } else if (hideable && state == STATE_HIDDEN) {
    ViewCompat.offsetTopAndBottom(child, parentHeight);
  } else if (state == STATE_COLLAPSED) {
    ViewCompat.offsetTopAndBottom(child, collapsedOffset);
  } else if (state == STATE_DRAGGING || state == STATE_SETTLING) {
    ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
  }

  nestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
  return true;
}
 

@Override
public boolean onLayoutChild(
        @NonNull CoordinatorLayout parent, @NonNull V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        child.setFitsSystemWindows(true);
    }

    if (viewRef == null) {
        // First layout with this behavior.
        peekHeightMin =
                parent.getResources().getDimensionPixelSize(R.dimen.design_bottom_sheet_peek_height_min);
        viewRef = new WeakReference<>(child);
        // Only set MaterialShapeDrawable as background if shapeTheming is enabled, otherwise will
        // default to android:background declared in styles or layout.
        if (shapeThemingEnabled && materialShapeDrawable != null) {
            ViewCompat.setBackground(child, materialShapeDrawable);
        }
        // Set elevation on MaterialShapeDrawable
        if (materialShapeDrawable != null) {
            // Use elevation attr if set on bottomsheet; otherwise, use elevation of child view.
            materialShapeDrawable.setElevation(
                    elevation == -1 ? ViewCompat.getElevation(child) : elevation);
            // Update the material shape based on initial state.
            isShapeExpanded = state == STATE_EXPANDED;
            materialShapeDrawable.setInterpolation(isShapeExpanded ? 0f : 1f);
        }
        updateAccessibilityActions();
        if (ViewCompat.getImportantForAccessibility(child)
                == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
            ViewCompat.setImportantForAccessibility(child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
        }
    }
    if (viewDragHelper == null) {
        viewDragHelper = ViewDragHelper.create(parent, dragCallback);
    }

    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    parentWidth = parent.getWidth();
    parentHeight = parent.getHeight();
    fitToContentsOffset = Math.max(0, parentHeight - child.getHeight());
    calculateHalfExpandedOffset();
    calculateCollapsedOffset();

    if (state == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, getExpandedOffset());
    } else if (state == STATE_HALF_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, halfExpandedOffset);
    } else if (hideable && state == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, parentHeight);
    } else if (state == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, collapsedOffset);
    } else if (state == STATE_DRAGGING || state == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }

    nestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}