Example usage for android.view View getMeasuredWidth

List of usage examples for android.view View getMeasuredWidth

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Introduction

In this page you can find the example usage for android.view View getMeasuredWidth.

Prototype

public final int getMeasuredWidth()

Source Link

Document

Like #getMeasuredWidthAndState() , but only returns the raw width component (that is the result is masked by #MEASURED_SIZE_MASK ).

Usage

From source file:com.bloomimpact.bancus.ui.views.VerticalViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollY = getScrollY();

    int decorCount = 0;

    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }//from w w w .  j a  v  a  2  s .  c  o  m
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childTop += scrollY;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }

    final int childHeight = height - paddingLeft - paddingRight;
    // Page views. Do this once we have the right padding offsets from above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {
                int toff = (int) (childHeight * ii.offset);
                int childLeft = paddingLeft;
                int childTop = paddingTop + toff;
                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    final int widthSpec = MeasureSpec
                            .makeMeasureSpec((int) (width - paddingLeft - paddingRight), MeasureSpec.EXACTLY);
                    final int heightSpec = MeasureSpec.makeMeasureSpec((int) (height * lp.heightFactor),
                            MeasureSpec.EXACTLY);
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;

    if (mFirstLayout) {
        scrollToItem(mCurItem, false, 0, false);
    }
    mFirstLayout = false;
}

From source file:cn.ieclipse.af.view.StaggeredGridView.java

/**
 * Measure and layout all currently visible children.
 *
 * @param queryAdapter true to requery the adapter for view data
 *///from   www.j  a va  2s.co  m
final void layoutChildren(boolean queryAdapter) {
    final int paddingLeft = getPaddingLeft();
    final int paddingRight = getPaddingRight();
    final int itemMargin = mItemMargin;
    final int colWidth = (getWidth() - paddingLeft - paddingRight - itemMargin * (mColCount - 1)) / mColCount;
    int rebuildLayoutRecordsBefore = -1;
    int rebuildLayoutRecordsAfter = -1;

    Arrays.fill(mItemBottoms, Integer.MIN_VALUE);

    final int childCount = getChildCount();
    for (int i = 0; i < childCount; i++) {
        View child = getChildAt(i);
        LayoutParams lp = (LayoutParams) child.getLayoutParams();
        final int col = lp.column;
        final int position = mFirstPosition + i;
        final boolean needsLayout = queryAdapter || child.isLayoutRequested();

        if (queryAdapter) {
            View newView = obtainView(position, child);
            if (newView != child) {
                removeViewAt(i);
                addView(newView, i);
                child = newView;
            }
            lp = (LayoutParams) child.getLayoutParams(); // Might have changed
        }

        final int span = Math.min(mColCount, lp.span);
        final int widthSize = colWidth * span + itemMargin * (span - 1);

        if (needsLayout) {
            final int widthSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.EXACTLY);

            final int heightSpec;
            if (lp.height == LayoutParams.WRAP_CONTENT) {
                heightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
            } else {
                heightSpec = MeasureSpec.makeMeasureSpec(lp.height, MeasureSpec.EXACTLY);
            }

            child.measure(widthSpec, heightSpec);
        }

        int childTop = mItemBottoms[col] > Integer.MIN_VALUE ? mItemBottoms[col] + mItemMargin : child.getTop();
        if (span > 1) {
            int lowest = childTop;
            for (int j = col + 1; j < col + span; j++) {
                final int bottom = mItemBottoms[j] + mItemMargin;
                if (bottom > lowest) {
                    lowest = bottom;
                }
            }
            childTop = lowest;
        }
        final int childHeight = child.getMeasuredHeight();
        final int childBottom = childTop + childHeight;
        final int childLeft = paddingLeft + col * (colWidth + itemMargin);
        final int childRight = childLeft + child.getMeasuredWidth();
        child.layout(childLeft, childTop, childRight, childBottom);

        for (int j = col; j < col + span; j++) {
            mItemBottoms[j] = childBottom;
        }

        final LayoutRecord rec = mLayoutRecords.get(position);
        if (rec != null && rec.height != childHeight) {
            // Invalidate our layout records for everything before this.
            rec.height = childHeight;
            rebuildLayoutRecordsBefore = position;
        }

        if (rec != null && rec.span != span) {
            // Invalidate our layout records for everything after this.
            rec.span = span;
            rebuildLayoutRecordsAfter = position;
        }
    }

    // Update mItemBottoms for any empty columns
    for (int i = 0; i < mColCount; i++) {
        if (mItemBottoms[i] == Integer.MIN_VALUE) {
            mItemBottoms[i] = mItemTops[i];
        }
    }

    if (rebuildLayoutRecordsBefore >= 0 || rebuildLayoutRecordsAfter >= 0) {
        if (rebuildLayoutRecordsBefore >= 0) {
            invalidateLayoutRecordsBeforePosition(rebuildLayoutRecordsBefore);
        }
        if (rebuildLayoutRecordsAfter >= 0) {
            invalidateLayoutRecordsAfterPosition(rebuildLayoutRecordsAfter);
        }
        for (int i = 0; i < childCount; i++) {
            final int position = mFirstPosition + i;
            final View child = getChildAt(i);
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            LayoutRecord rec = mLayoutRecords.get(position);
            if (rec == null) {
                rec = new LayoutRecord();
                mLayoutRecords.put(position, rec);
            }
            rec.column = lp.column;
            rec.height = child.getHeight();
            rec.id = lp.id;
            rec.span = Math.min(mColCount, lp.span);
        }
    }
}

From source file:cn.trinea.android.common.view.CycleViewPager.java

/**
 * This method will be invoked when the current page is scrolled, either as part
 * of a programmatically initiated smooth scroll or a user initiated touch scroll.
 * If you override this method you must call through to the superclass implementation
 * (e.g. super.onPageScrolled(position, offset, offsetPixels)) before onPageScrolled
 * returns./*www  . j  a v  a 2 s.c o m*/
 *
 * @param position Position index of the first page currently being displayed.
 *                 Page position+1 will be visible if positionOffset is nonzero.
 * @param offset Value from [0, 1) indicating the offset from the page at position.
 * @param offsetPixels Value in pixels indicating the offset from position.
 */
protected void onPageScrolled(int position, float offset, int offsetPixels) {
    // Offset any decor views if needed - keep them on-screen at all times.
    if (mDecorChildCount > 0) {
        final int scrollX = getScrollX();
        int paddingLeft = getPaddingLeft();
        int paddingRight = getPaddingRight();
        final int width = getWidth();
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = getChildAt(i);
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            if (!lp.isDecor)
                continue;

            final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
            int childLeft = 0;
            switch (hgrav) {
            default:
                childLeft = paddingLeft;
                break;
            case Gravity.LEFT:
                childLeft = paddingLeft;
                paddingLeft += child.getWidth();
                break;
            case Gravity.CENTER_HORIZONTAL:
                childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                break;
            case Gravity.RIGHT:
                childLeft = width - paddingRight - child.getMeasuredWidth();
                paddingRight += child.getMeasuredWidth();
                break;
            }
            childLeft += scrollX;

            final int childOffset = childLeft - child.getLeft();
            if (childOffset != 0) {
                child.offsetLeftAndRight(childOffset);
            }
        }
    }

    if (mOnPageChangeListener != null) {
        mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels);
    }
    if (mInternalPageChangeListener != null) {
        mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels);
    }

    if (mPageTransformer != null) {
        final int scrollX = getScrollX();
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = getChildAt(i);
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();

            if (lp.isDecor)
                continue;

            final float transformPos = (float) (child.getLeft() - scrollX) / getWidth();
            mPageTransformer.transformPage(child, transformPos);
        }
    }

    mCalledSuper = true;
}

From source file:android.support.designox.widget.CoordinatorLayout.java

/**
 * Lay out a child view with no special handling. This will position the child as
 * if it were within a FrameLayout or similar simple frame.
 *
 * @param child child view to lay out/*  w  w w  .  j  a va 2 s .com*/
 * @param layoutDirection ViewCompat constant for the desired layout direction
 */
private void layoutChild(View child, int layoutDirection) {
    final LayoutParams lp = (LayoutParams) child.getLayoutParams();
    final Rect parent = mTempRect1;
    parent.set(getPaddingLeft() + lp.leftMargin, getPaddingTop() + lp.topMargin,
            getWidth() - getPaddingRight() - lp.rightMargin,
            getHeight() - getPaddingBottom() - lp.bottomMargin);

    if (mLastInsets != null && ViewCompat.getFitsSystemWindows(this)
            && !ViewCompat.getFitsSystemWindows(child)) {
        // If we're set to handle insets but this child isn't, then it has been measured as
        // if there are no insets. We need to lay it out to match.
        parent.left += mLastInsets.getSystemWindowInsetLeft();
        parent.top += mLastInsets.getSystemWindowInsetTop();
        parent.right -= mLastInsets.getSystemWindowInsetRight();
        parent.bottom -= mLastInsets.getSystemWindowInsetBottom();
    }

    final Rect out = mTempRect2;
    GravityCompat.apply(resolveGravity(lp.gravity), child.getMeasuredWidth(), child.getMeasuredHeight(), parent,
            out, layoutDirection);
    child.layout(out.left, out.top, out.right, out.bottom);
}

From source file:com.appunite.list.HorizontalListView.java

/**
 * Re-measure a child, and if its width changes, lay it out preserving its
 * top, and adjust the children below it appropriately.
 * @param child The child/*from  w  ww. j ava 2s  . c  o m*/
 * @param childIndex The view group index of the child.
 * @param numChildren The number of children in the view group.
 */
private void measureAndAdjustRight(View child, int childIndex, int numChildren) {
    int oldWidth = child.getWidth();
    measureItem(child);
    if (child.getMeasuredWidth() != oldWidth) {
        // lay out the view, preserving its top
        relayoutMeasuredItem(child);

        // adjust views below appropriately
        final int widthDelta = child.getMeasuredWidth() - oldWidth;
        for (int i = childIndex + 1; i < numChildren; i++) {
            getChildAt(i).offsetLeftAndRight(widthDelta);
        }
    }
}

From source file:com.appunite.list.HorizontalListView.java

/**
 * Put mSelectedPosition in the middle of the screen and then build up and
 * down from there. This method forces mSelectedPosition to the center.
 *
 * @param childrenLeft Top of the area in which children can be drawn, as
 *        measured in pixels//w w  w  .  j a va  2  s.  com
 * @param childrenRight Bottom of the area in which children can be drawn,
 *        as measured in pixels
 * @return Currently selected view
 */
private View fillFromMiddle(int childrenLeft, int childrenRight) {
    int width = childrenRight - childrenLeft;

    int position = reconcileSelectedPosition();

    View sel = makeAndAddView(position, childrenLeft, true, mListPadding.top, true);
    mFirstPosition = position;

    int selWidth = sel.getMeasuredWidth();
    if (selWidth <= width) {
        sel.offsetLeftAndRight((width - selWidth) / 2);
    }

    fillToLeftAndRight(sel, position);

    if (!mStackFromRight) {
        correctTooHigh(getChildCount());
    } else {
        correctTooLow(getChildCount());
    }

    return sel;
}

From source file:com.baiiu.autoloopviewpager.loopvp.LoopViewPager.java

/**
 * This method will be invoked when the current page is scrolled, either as
 * part of a programmatically initiated smooth scroll or a user initiated
 * touch scroll. If you override this method you must call through to the
 * superclass implementation (e.g. super.onPageScrolled(position, offset,
 * offsetPixels)) before onPageScrolled returns.
 *
 * @param position Position index of the first page currently being displayed.
 * Page position+1 will be visible if positionOffset is nonzero.
 * @param offset Value from [0, 1) indicating the offset from the page at
 * position./*from   w w  w .jav  a2 s  . com*/
 * @param offsetPixels Value in pixels indicating the offset from position.
 */
protected void onPageScrolled(int position, float offset, int offsetPixels) {
    // Offset any decor views if needed - keep them on-screen at all times.
    if (mDecorChildCount > 0) {
        final int scrollX = getScrollX();
        int paddingLeft = getPaddingLeft();
        int paddingRight = getPaddingRight();
        final int width = getWidth();
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = getChildAt(i);
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            if (!lp.isDecor)
                continue;

            final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
            int childLeft = 0;
            switch (hgrav) {
            default:
                childLeft = paddingLeft;
                break;
            case Gravity.LEFT:
                childLeft = paddingLeft;
                paddingLeft += child.getWidth();
                break;
            case Gravity.CENTER_HORIZONTAL:
                childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                break;
            case Gravity.RIGHT:
                childLeft = width - paddingRight - child.getMeasuredWidth();
                paddingRight += child.getMeasuredWidth();
                break;
            }
            childLeft += scrollX;

            final int childOffset = childLeft - child.getLeft();
            if (childOffset != 0) {
                child.offsetLeftAndRight(childOffset);
            }
        }
    }

    if (mOnPageChangeListener != null) {
        mOnPageChangeListener.onPageScrolled(position, offset, offsetPixels);
    }

    if (mOnPageChangeListeners != null) {
        for (int i = 0, z = mOnPageChangeListeners.size(); i < z; i++) {
            OnPageChangeListener listener = mOnPageChangeListeners.get(i);
            if (listener != null) {
                listener.onPageScrolled(position, offset, offsetPixels);
            }
        }
    }

    if (mInternalPageChangeListener != null) {
        mInternalPageChangeListener.onPageScrolled(position, offset, offsetPixels);
    }
    mCalledSuper = true;
}

From source file:com.gather.android.widget.MyViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();

    int decorCount = 0;

    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }//from  w w  w  . j  ava 2  s . c om
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childLeft += scrollX;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }

    final int childWidth = width - paddingLeft - paddingRight;
    // Page views. Do this once we have the right padding offsets from
    // above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {
                int loff = (int) (childWidth * ii.offset);
                int childLeft = paddingLeft + loff;
                int childTop = paddingTop;
                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    final int widthSpec = MeasureSpec.makeMeasureSpec((int) (childWidth * lp.widthFactor),
                            MeasureSpec.EXACTLY);
                    final int heightSpec = MeasureSpec
                            .makeMeasureSpec((int) (height - paddingTop - paddingBottom), MeasureSpec.EXACTLY);
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;
    // MyLogger.showLogWithLineNum(4,
    // "?MyViewPager ----> onLayout ___ mFirstLayout=="+mFirstLayout);
    if (mFirstLayout) {
        scrollToItem(mCurItem, false, 0, false);
    }
    mFirstLayout = false;
    // MyLogger.showLogWithLineNum(5,
    // "?MyViewPager ----> onLayout ___ mFirstLayout=="+mFirstLayout);
}

From source file:com.example.android_test.loopviewpager.LoopViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;/*from  w  w w. j  av a 2 s .c  om*/
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();

    int decorCount = 0;

    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childLeft += scrollX;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }

    // Page views. Do this once we have the right padding offsets from
    // above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {

                int loff = (int) (width * ii.offset);

                int childLeft = paddingLeft + loff;
                int childTop = paddingTop;

                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    final int widthSpec = MeasureSpec.makeMeasureSpec(
                            (int) ((width - paddingLeft - paddingRight) * lp.widthFactor), MeasureSpec.EXACTLY);
                    final int heightSpec = MeasureSpec
                            .makeMeasureSpec((int) (height - paddingTop - paddingBottom), MeasureSpec.EXACTLY);
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }

    // CHANGE
    scrollTo(0, 0);

    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;
    mFirstLayout = false;
}

From source file:com.awrtechnologies.carbudgetsales.hlistview.widget.HListView.java

/**
 * Put mSelectedPosition in the middle of the screen and then build up and down from there. This method forces mSelectedPosition
 * to the center.//w  w w  . j  a  va  2  s  .c  o  m
 * 
 * @param childrenLeft
 *           Left of the area in which children can be drawn, as measured in pixels
 * @param childrenRight
 *           Right of the area in which children can be drawn, as measured in pixels
 * @return Currently selected view
 */
private View fillFromMiddle(int childrenLeft, int childrenRight) {
    int width = childrenRight - childrenLeft;

    int position = reconcileSelectedPosition();

    View sel = makeAndAddView(position, childrenLeft, true, mListPadding.top, true);
    mFirstPosition = position;

    int selWidth = sel.getMeasuredWidth();
    if (selWidth <= width) {
        sel.offsetLeftAndRight((width - selWidth) / 2);
    }

    fillBeforeAndAfter(sel, position);

    if (!mStackFromRight) {
        correctTooWide(getChildCount());
    } else {
        correctTooSmall(getChildCount());
    }

    return sel;
}