Example usage for android.support.v4.view ViewCompat setAccessibilityDelegate

List of usage examples for android.support.v4.view ViewCompat setAccessibilityDelegate

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Introduction

In this page you can find the example usage for android.support.v4.view ViewCompat setAccessibilityDelegate.

Prototype

public static void setAccessibilityDelegate(View v, AccessibilityDelegateCompat delegate)

Source Link

Document

Sets a delegate for implementing accessibility support via compositon as opposed to inheritance.

Usage

From source file:com.av.remusic.widget.RoundViewPager.java

void initViewPager() {
    setWillNotDraw(false);// www  . j av  a2  s .co m
    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();
    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 android.support.v4.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);
        }
    });
    isRotating = false;
}

From source file:com.example.myronlg.cardviewpagerdemo.MultiCardViewPager.java

void initViewPager() {

    getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
        @Override//from   w  w  w .j  a  v a2 s .  c o m
        public void onGlobalLayout() {
            itemScrollOffset = (int) (getClientWidth() * mAdapter.getPageWidth(0));
            //                int maxScrollX = (int) (2*getClientWidth()*mAdapter.getPageWidth(0) + (mAdapter.getCount() - 2) * getClientWidth() * mAdapter.getPageWidth(1) - getWidth() + getClientWidth()*0.5F);
            maxScrollX = (int) (getClientWidth() * (2 * mAdapter.getPageWidth(0)
                    + (mAdapter.getCount() - 2) * mAdapter.getPageWidth(1) - 1 + 0.0F));
            minScrollX = (int) (-getClientWidth() * 0.0F);
            //                itemScrollOffset = 0;
            getViewTreeObserver().removeOnGlobalLayoutListener(this);
        }
    });

    setWillNotDraw(false);
    setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
    setFocusable(true);
    final Context context = getContext();
    mScroller = new Scroller(context, sInterpolator);

    myScroller = new Scroller(context, new AccelerateInterpolator());
    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();
    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);
    }
}

From source file:com.zyk.drawerlayout.widget.DrawerLayout.java

public DrawerLayout(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
    density = getResources().getDisplayMetrics().density;
    mMinDrawerMarginWidth = (int) (MIN_DRAWER_MARGIN * density + 0.5f);
    //FIXME ????//  w ww .j a  va  2  s.  c om
    mMinDrawerMarginHeight = mMinDrawerMarginWidth;
    final float minVel = MIN_FLING_VELOCITY * density;

    mLeftCallback = new ViewDragCallback(Gravity.LEFT);
    mRightCallback = new ViewDragCallback(Gravity.RIGHT);
    mTopCallback = new ViewDragCallback(Gravity.TOP);
    mBottomCallback = new ViewDragCallback(Gravity.BOTTOM);

    mLeftDragger = ViewDragHelper.create(this, TOUCH_SLOP_SENSITIVITY, mLeftCallback);
    mLeftDragger.setEdgeTrackingEnabled(ViewDragHelper.EDGE_LEFT);
    mLeftDragger.setMinVelocity(minVel);
    mLeftCallback.setDragger(mLeftDragger);

    mRightDragger = ViewDragHelper.create(this, TOUCH_SLOP_SENSITIVITY, mRightCallback);
    mRightDragger.setEdgeTrackingEnabled(ViewDragHelper.EDGE_RIGHT);
    mRightDragger.setMinVelocity(minVel);
    mRightCallback.setDragger(mRightDragger);

    mTopDragger = ViewDragHelper.create(this, TOUCH_SLOP_SENSITIVITY, mTopCallback);
    mTopDragger.setEdgeTrackingEnabled(ViewDragHelper.EDGE_TOP);
    mTopDragger.setMinVelocity(minVel);
    mTopCallback.setDragger(mTopDragger);

    mBottomDragger = ViewDragHelper.create(this, TOUCH_SLOP_SENSITIVITY, mBottomCallback);
    mBottomDragger.setEdgeTrackingEnabled(ViewDragHelper.EDGE_BOTTOM);
    mBottomDragger.setMinVelocity(minVel);
    mBottomCallback.setDragger(mBottomDragger);

    // So that we can catch the back button
    setFocusableInTouchMode(true);

    ViewCompat.setImportantForAccessibility(this, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);

    ViewCompat.setAccessibilityDelegate(this, new AccessibilityDelegate());
    ViewGroupCompat.setMotionEventSplittingEnabled(this, false);
    if (ViewCompat.getFitsSystemWindows(this)) {
        IMPL.configureApplyInsets(this);
        mStatusBarBackground = IMPL.getDefaultStatusBarBackground(context);
    }

    mDrawerElevation = DRAWER_ELEVATION * density;

    mNonDrawerViews = new ArrayList<View>();
}

From source file:com.example.sky.test.view.ViewPager.java

void initViewPager() {
    setWillNotDraw(false);/*from w  ww  .j a v a2 s.  co m*/
    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 ViewPager.MyAccessibilityDelegate());

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

    ViewCompat.setOnApplyWindowInsetsListener(this, new android.support.v4.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);
        }
    });
}

From source file:example.luojing.androidsourceanalysis.ViewPager.java

/**
 * ??/* ww w. ja  v  a2 s. c om*/
 */
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 android.support.v4.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);
        }
    });
}

From source file:android.support.v7.widget.RecyclerViewEx.java

/**
 * Sets the accessibility delegate compatibility implementation used by RecyclerViewEx.
 * @param accessibilityDelegate The accessibility delegate to be used by RecyclerViewEx.
 *///from   w w  w .  ja  v  a  2 s. c o  m
public void setAccessibilityDelegateCompat(RecyclerViewAccessibilityDelegateEx accessibilityDelegate) {
    mAccessibilityDelegate = accessibilityDelegate;
    ViewCompat.setAccessibilityDelegate(this, mAccessibilityDelegate);
}

From source file:com.facebook.litho.ComponentHost.java

protected void refreshAccessibilityDelegatesIfNeeded(boolean isAccessibilityEnabled) {
    if (isAccessibilityEnabled == mIsComponentAccessibilityDelegateSet) {
        return;//from  www  .  j  av  a 2 s .c om
    }

    ViewCompat.setAccessibilityDelegate(this, isAccessibilityEnabled ? mComponentAccessibilityDelegate : null);
    mIsComponentAccessibilityDelegateSet = isAccessibilityEnabled;

    for (int i = 0, size = getChildCount(); i < size; i++) {
        final View child = getChildAt(i);
        if (child instanceof ComponentHost) {
            ((ComponentHost) child).refreshAccessibilityDelegatesIfNeeded(isAccessibilityEnabled);
        } else {
            final NodeInfo nodeInfo = (NodeInfo) child.getTag(R.id.component_node_info);
            if (nodeInfo != null) {
                ViewCompat.setAccessibilityDelegate(child,
                        isAccessibilityEnabled ? new ComponentAccessibilityDelegate(child, nodeInfo) : null);
            }
        }
    }
}

From source file:cn.ismartv.recyclerview.widget.RecyclerView.java

/**
 * Sets the accessibility delegate compatibility implementation used by RecyclerView.
 * @param accessibilityDelegate The accessibility delegate to be used by RecyclerView.
 *///from ww w . j a v  a2 s.  c  o m
public void setAccessibilityDelegateCompat(RecyclerViewAccessibilityDelegate accessibilityDelegate) {
    mAccessibilityDelegate = accessibilityDelegate;
    ViewCompat.setAccessibilityDelegate(this, mAccessibilityDelegate);
}

From source file:com.redinput.datetimepickercompat.time.RadialPickerLayout.java

private void installAccessibilityDelegate() {
    // The accessibility delegate enables customizing accessibility behavior
    // via composition as opposed as inheritance. The main benefit is that
    // one can write a backwards compatible application by setting the delegate
    // only if the API level is high enough i.e. the delegate is part of the APIs.
    // The easiest way to achieve that is by using the support library which
    // takes the burden of checking API version and knowing which API version
    // introduced the delegate off the developer.
    ViewCompat.setAccessibilityDelegate(this, new AccessibilityDelegateCompat() {

        @Override// w  w w . j  av a2  s . com
        public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfoCompat info) {
            super.onInitializeAccessibilityNodeInfo(host, info);
            // Note that View.onInitializeAccessibilityNodeInfo was introduced in
            // ICS and we would like to tweak a bit the text that is reported to
            // accessibility services via the AccessibilityNodeInfo.
            info.addAction(AccessibilityNodeInfoCompat.ACTION_SCROLL_FORWARD);
            info.addAction(AccessibilityNodeInfoCompat.ACTION_SCROLL_BACKWARD);
        }

        @Override
        public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) {
            if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
                // Clear the event's current text so that only the current time will be spoken.
                event.getText().clear();
                Time time = new Time();
                time.hour = getHours();
                time.minute = getMinutes();
                long millis = time.normalize(true);
                int flags = DateUtils.FORMAT_SHOW_TIME;
                if (mIs24HourMode) {
                    flags |= DateUtils.FORMAT_24HOUR;
                }
                String timeString = DateUtils.formatDateTime(getContext(), millis, flags);
                event.getText().add(timeString);
                return true;
            }

            return super.dispatchPopulateAccessibilityEvent(host, event);
        }

        @Override
        public boolean performAccessibilityAction(View host, int action, Bundle args) {
            if (super.performAccessibilityAction(host, action, args)) {
                return true;
            }

            int changeMultiplier = 0;
            if (action == AccessibilityNodeInfoCompat.ACTION_SCROLL_FORWARD) {
                changeMultiplier = 1;
            } else if (action == AccessibilityNodeInfoCompat.ACTION_SCROLL_BACKWARD) {
                changeMultiplier = -1;
            }
            if (changeMultiplier != 0) {
                int value = getCurrentlyShowingValue();
                int stepSize = 0;
                int currentItemShowing = getCurrentItemShowing();
                if (currentItemShowing == HOUR_INDEX) {
                    stepSize = HOUR_VALUE_TO_DEGREES_STEP_SIZE;
                    value %= 12;
                } else if (currentItemShowing == MINUTE_INDEX) {
                    stepSize = MINUTE_VALUE_TO_DEGREES_STEP_SIZE;
                }

                int degrees = value * stepSize;
                degrees = snapOnly30s(degrees, changeMultiplier);
                value = degrees / stepSize;
                int maxValue = 0;
                int minValue = 0;
                if (currentItemShowing == HOUR_INDEX) {
                    if (mIs24HourMode) {
                        maxValue = 23;
                    } else {
                        maxValue = 12;
                        minValue = 1;
                    }
                } else {
                    maxValue = 55;
                }
                if (value > maxValue) {
                    // If we scrolled forward past the highest number, wrap around to the
                    // lowest.
                    value = minValue;
                } else if (value < minValue) {
                    // If we scrolled backward past the lowest number, wrap around to the
                    // highest.
                    value = maxValue;
                }
                setItem(currentItemShowing, value);
                mListener.onValueSelected(currentItemShowing, value, false);
                return true;
            }

            return false;
        }
    });
}

From source file:android.support.v71.widget.RecyclerView.java

/**
 * Sets the accessibility delegate compatibility implementation used by RecyclerView.
 *
 * @param accessibilityDelegate The accessibility delegate to be used by RecyclerView.
 *//*w w w .  ja  v a  2  s.  c o  m*/
public void setAccessibilityDelegateCompat(
        android.support.v71.widget.RecyclerViewAccessibilityDelegate accessibilityDelegate) {
    mAccessibilityDelegate = accessibilityDelegate;
    ViewCompat.setAccessibilityDelegate(this, mAccessibilityDelegate);
}