Example usage for android.view View measure

List of usage examples for android.view View measure

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Introduction

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

Prototype

public final void measure(int widthMeasureSpec, int heightMeasureSpec)

Source Link

Document

This is called to find out how big a view should be.

Usage

From source file:com.github.shareme.gwsmaterialuikit.library.material.widget.ListPopupWindow.java

/**
 * <p>Builds the popup window's content and returns the height the popup
 * should have. Returns -1 when the content already exists.</p>
 *
 * @return the content's height or -1 if content already exists
 *///from www  .j  a v  a2s.  co  m
@SuppressWarnings("Range")
private int buildDropDown() {
    int otherHeights = 0;

    if (mDropDownList == null) {
        ViewGroup dropDownView;
        Context context = mContext;

        /**
         * This Runnable exists for the sole purpose of checking if the view layout has got
         * completed and if so call showDropDown to display the drop down. This is used to show
         * the drop down as soon as possible after user opens up the search dialog, without
         * waiting for the normal UI pipeline to do it's job which is slower than this method.
         */
        mShowDropDownRunnable = new Runnable() {
            public void run() {
                // View layout should be all done before displaying the drop down.
                View view = getAnchorView();
                if (view != null && view.getWindowToken() != null) {
                    show();
                }
            }
        };

        mDropDownList = new DropDownListView(context, !mModal);
        if (mDropDownListHighlight != null) {
            mDropDownList.setSelector(mDropDownListHighlight);
        }
        mDropDownList.setAdapter(mAdapter);
        mDropDownList.setOnItemClickListener(mItemClickListener);
        mDropDownList.setFocusable(true);
        mDropDownList.setFocusableInTouchMode(true);
        mDropDownList.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                if (position != -1) {
                    DropDownListView dropDownList = mDropDownList;

                    if (dropDownList != null) {
                        dropDownList.mListSelectionHidden = false;
                    }
                }
            }

            public void onNothingSelected(AdapterView<?> parent) {
            }
        });
        mDropDownList.setOnScrollListener(mScrollListener);

        if (mItemSelectedListener != null) {
            mDropDownList.setOnItemSelectedListener(mItemSelectedListener);
        }

        dropDownView = mDropDownList;

        View hintView = mPromptView;
        if (hintView != null) {
            // if a hint has been specified, we accomodate more space for it and
            // add a text view in the drop down menu, at the bottom of the list
            LinearLayout hintContainer = new LinearLayout(context);
            hintContainer.setOrientation(LinearLayout.VERTICAL);

            LinearLayout.LayoutParams hintParams = new LinearLayout.LayoutParams(
                    ViewGroup.LayoutParams.MATCH_PARENT, 0, 1.0f);

            switch (mPromptPosition) {
            case POSITION_PROMPT_BELOW:
                hintContainer.addView(dropDownView, hintParams);
                hintContainer.addView(hintView);
                break;

            case POSITION_PROMPT_ABOVE:
                hintContainer.addView(hintView);
                hintContainer.addView(dropDownView, hintParams);
                break;

            default:
                Timber.e("Invalid hint position " + mPromptPosition);
                break;
            }

            // measure the hint's height to find how much more vertical space
            // we need to add to the drop down's height
            int widthSpec = MeasureSpec.makeMeasureSpec(mDropDownWidth, MeasureSpec.AT_MOST);
            int heightSpec = MeasureSpec.UNSPECIFIED;
            hintView.measure(widthSpec, heightSpec);

            hintParams = (LinearLayout.LayoutParams) hintView.getLayoutParams();
            otherHeights = hintView.getMeasuredHeight() + hintParams.topMargin + hintParams.bottomMargin;

            dropDownView = hintContainer;
        }

        mPopup.setContentView(dropDownView);

    } else {
        final View view = mPromptView;
        if (view != null) {
            LinearLayout.LayoutParams hintParams = (LinearLayout.LayoutParams) view.getLayoutParams();
            otherHeights = view.getMeasuredHeight() + hintParams.topMargin + hintParams.bottomMargin;
        }
    }

    // getMaxAvailableHeight() subtracts the padding, so we put it back
    // to get the available height for the whole window
    int padding = 0;
    Drawable background = mPopup.getBackground();
    if (background != null) {
        background.getPadding(mTempRect);
        padding = mTempRect.top + mTempRect.bottom;

        // If we don't have an explicit vertical offset, determine one from the window
        // background so that content will line up.
        if (!mDropDownVerticalOffsetSet) {
            mDropDownVerticalOffset = -mTempRect.top;
        }
    } else {
        mTempRect.setEmpty();
    }

    int systemBarsReservedSpace = 0;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        //  getMaxAvailableHeight() on Lollipop seems to ignore the system bars.
        systemBarsReservedSpace = Math.max(getSystemBarHeight("status_bar_height"),
                getSystemBarHeight("navigation_bar_height"));
    }

    // Max height available on the screen for a popup.
    boolean ignoreBottomDecorations = mPopup.getInputMethodMode() == PopupWindow.INPUT_METHOD_NOT_NEEDED;
    final int maxHeight = mPopup.getMaxAvailableHeight(getAnchorView(),
            mDropDownVerticalOffset /*, ignoreBottomDecorations*/) - systemBarsReservedSpace;

    if (mDropDownAlwaysVisible || mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) {
        return maxHeight + padding;
    }

    final int childWidthSpec;
    switch (mDropDownWidth) {
    case ViewGroup.LayoutParams.WRAP_CONTENT:
        childWidthSpec = MeasureSpec.makeMeasureSpec(
                mContext.getResources().getDisplayMetrics().widthPixels - (mTempRect.left + mTempRect.right),
                MeasureSpec.AT_MOST);
        break;
    case ViewGroup.LayoutParams.MATCH_PARENT:
        childWidthSpec = MeasureSpec.makeMeasureSpec(
                mContext.getResources().getDisplayMetrics().widthPixels - (mTempRect.left + mTempRect.right),
                MeasureSpec.EXACTLY);
        break;
    default:
        childWidthSpec = MeasureSpec.makeMeasureSpec(mDropDownWidth, MeasureSpec.EXACTLY);
        break;
    }

    final int listContent = mDropDownList.measureHeightOfChildrenCompat(childWidthSpec, 0,
            DropDownListView.NO_POSITION, maxHeight - otherHeights, -1);
    // add padding only if the list has items in it, that way we don't show
    // the popup if it is not needed
    if (listContent > 0)
        otherHeights += padding;

    return listContent + otherHeights;
}

From source file:caesar.feng.framework.widget.StaggeredGrid.ExtendableListView.java

/**
 * Measures a child view in the list. Should call
 *//*from   www  .  j av  a  2s .c  om*/
protected void onMeasureChild(final View child, final LayoutParams layoutParams) {
    int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec,
            getListPaddingLeft() + getListPaddingRight(), layoutParams.width);
    int lpHeight = layoutParams.height;
    int childHeightSpec;
    if (lpHeight > 0) {
        childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY);
    } else {
        childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
    }
    child.measure(childWidthSpec, childHeightSpec);
}

From source file:com.baidu.zhuanche.view.LazyViewPager.java

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    // For simple implementation, or internal size is always 0.
    // We depend on the container to specify the layout size of
    // our view.  We can't really know what it is since we will be
    // adding and removing different arbitrary views and do not
    // want the layout to change as this happens.
    setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), getDefaultSize(0, heightMeasureSpec));

    // Children are just made to fill our space.
    int childWidthSize = getMeasuredWidth() - getPaddingLeft() - getPaddingRight();
    int childHeightSize = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();

    /*//  w w  w.j a v  a 2s .  com
     * Make sure all children have been properly measured. Decor views first.
     * Right now we cheat and make this less complicated by assuming decor
     * views won't intersect. We will pin to edges based on gravity.
     */
    int size = getChildCount();
    for (int i = 0; i < size; ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            if (lp != null && lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                Log.d(TAG, "gravity: " + lp.gravity + " hgrav: " + hgrav + " vgrav: " + vgrav);
                int widthMode = MeasureSpec.AT_MOST;
                int heightMode = MeasureSpec.AT_MOST;
                boolean consumeVertical = vgrav == Gravity.TOP || vgrav == Gravity.BOTTOM;
                boolean consumeHorizontal = hgrav == Gravity.LEFT || hgrav == Gravity.RIGHT;

                if (consumeVertical) {
                    widthMode = MeasureSpec.EXACTLY;
                } else if (consumeHorizontal) {
                    heightMode = MeasureSpec.EXACTLY;
                }

                final int widthSpec = MeasureSpec.makeMeasureSpec(childWidthSize, widthMode);
                final int heightSpec = MeasureSpec.makeMeasureSpec(childHeightSize, heightMode);
                child.measure(widthSpec, heightSpec);

                if (consumeVertical) {
                    childHeightSize -= child.getMeasuredHeight();
                } else if (consumeHorizontal) {
                    childWidthSize -= child.getMeasuredWidth();
                }
            }
        }
    }

    mChildWidthMeasureSpec = MeasureSpec.makeMeasureSpec(childWidthSize, MeasureSpec.EXACTLY);
    mChildHeightMeasureSpec = MeasureSpec.makeMeasureSpec(childHeightSize, MeasureSpec.EXACTLY);

    // Make sure we have created all fragments that we need to have shown.
    mInLayout = true;
    populate();
    mInLayout = false;

    // Page views next.
    size = getChildCount();
    for (int i = 0; i < size; ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            if (DEBUG)
                Log.v(TAG, "Measuring #" + i + " " + child + ": " + mChildWidthMeasureSpec);

            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            if (lp == null || !lp.isDecor) {
                child.measure(mChildWidthMeasureSpec, mChildHeightMeasureSpec);
            }
        }
    }
}

From source file:com.ferg.awfulapp.widget.AwfulViewPager.java

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    // For simple implementation, or internal size is always 0.
    // We depend on the container to specify the layout size of
    // our view.  We can't really know what it is since we will be
    // adding and removing different arbitrary views and do not
    // want the layout to change as this happens.
    setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), getDefaultSize(0, heightMeasureSpec));

    // Children are just made to fill our space.
    int childWidthSize = getMeasuredWidth() - getPaddingLeft() - getPaddingRight();
    int childHeightSize = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();

    /*/*from  w  ww . j  a v a 2  s . c om*/
    * Make sure all children have been properly measured. Decor views first.
    * Right now we cheat and make this less complicated by assuming decor
    * views won't intersect. We will pin to edges based on gravity.
    */
    int size = getChildCount();
    for (int i = 0; i < size; ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            if (lp != null && lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                //Log.d(TAG, "gravity: " + lp.gravity + " hgrav: " + hgrav + " vgrav: " + vgrav);
                int widthMode = MeasureSpec.AT_MOST;
                int heightMode = MeasureSpec.AT_MOST;
                boolean consumeVertical = vgrav == Gravity.TOP || vgrav == Gravity.BOTTOM;
                boolean consumeHorizontal = hgrav == Gravity.LEFT || hgrav == Gravity.RIGHT;

                if (consumeVertical) {
                    widthMode = MeasureSpec.EXACTLY;
                } else if (consumeHorizontal) {
                    heightMode = MeasureSpec.EXACTLY;
                }

                final int widthSpec = MeasureSpec.makeMeasureSpec(childWidthSize, widthMode);
                final int heightSpec = MeasureSpec.makeMeasureSpec(childHeightSize, heightMode);
                child.measure(widthSpec, heightSpec);

                if (consumeVertical) {
                    childHeightSize -= child.getMeasuredHeight();
                } else if (consumeHorizontal) {
                    childWidthSize -= child.getMeasuredWidth();
                }
            }
        }
    }

    mChildWidthMeasureSpec = MeasureSpec.makeMeasureSpec(childWidthSize, MeasureSpec.EXACTLY);
    mChildHeightMeasureSpec = MeasureSpec.makeMeasureSpec(childHeightSize, MeasureSpec.EXACTLY);

    // Make sure we have created all fragments that we need to have shown.
    mInLayout = true;
    populate();
    mInLayout = false;

    // Page views next.
    size = getChildCount();
    for (int i = 0; i < size; ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            //                   if (DEBUG) Log.v(TAG, "Measuring #" + i + " " + child
            //                           + ": " + mChildWidthMeasureSpec);

            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            if (lp == null || !lp.isDecor) {
                child.measure(mChildWidthMeasureSpec, mChildHeightMeasureSpec);
            }
        }
    }
}

From source file:com.doubleTwist.drawerlib.ADrawerLayout.java

@Override
protected void measureChild(View v, int widthSpec, int heightSpec) {
    int wMode, hMode, wSpec, hSpec;
    int maxW = MeasureSpec.getSize(widthSpec);
    int maxH = MeasureSpec.getSize(heightSpec);
    LayoutParams params = (LayoutParams) v.getLayoutParams();

    if (DEBUG) {/*from   w w w .j  av  a  2 s.c  om*/
        Log.d(TAG, " == VIEW == " + v.toString());
        Log.d(TAG, "params.width: " + params.width);
        Log.d(TAG, "params.height: " + params.height);
        Log.d(TAG, "maxW: " + maxW);
        Log.d(TAG, "maxH: " + maxH);
    }

    if (params.width == LayoutParams.WRAP_CONTENT) {
        wMode = MeasureSpec.AT_MOST;
        wSpec = MeasureSpec.makeMeasureSpec(maxW, wMode);
    } else if (params.width == LayoutParams.MATCH_PARENT) {
        wMode = MeasureSpec.EXACTLY;
        wSpec = MeasureSpec.makeMeasureSpec(maxW, wMode);
    } else {
        wMode = MeasureSpec.EXACTLY;
        wSpec = MeasureSpec.makeMeasureSpec(Math.min(maxW, params.width), wMode);
    }
    if (params.height == LayoutParams.WRAP_CONTENT) {
        hMode = MeasureSpec.AT_MOST;
        hSpec = MeasureSpec.makeMeasureSpec(maxH, hMode);
    } else if (params.height == LayoutParams.MATCH_PARENT) {
        hMode = MeasureSpec.EXACTLY;
        hSpec = MeasureSpec.makeMeasureSpec(maxH, hMode);
    } else {
        hMode = MeasureSpec.EXACTLY;
        hSpec = MeasureSpec.makeMeasureSpec(Math.min(maxH, params.height), hMode);
    }

    v.measure(wSpec, hSpec);

    if (DEBUG) {
        Log.d(TAG, " == VIEW == " + v.toString());
        Log.d(TAG, "mwidth: " + v.getMeasuredWidth());
        Log.d(TAG, "mheight: " + v.getMeasuredHeight());
    }
}

From source file:de.vanita5.twittnuker.util.Utils.java

public static String getMapStaticImageUri(final double lat, final double lng, final View v) {
    if (v == null)
        return null;
    final int wSpec = MeasureSpec.makeMeasureSpec(v.getWidth(), MeasureSpec.UNSPECIFIED);
    final int hSpec = MeasureSpec.makeMeasureSpec(v.getHeight(), MeasureSpec.UNSPECIFIED);
    v.measure(wSpec, hSpec);
    return getMapStaticImageUri(lat, lng, 12, v.getMeasuredWidth(), v.getMeasuredHeight(),
            v.getResources().getConfiguration().locale);
}

From source file:com.huewu.pla.lib.internal.PLAListView.java

private void measureScrapChild(final View child, final int position, final int widthMeasureSpec) {
    LayoutParams p = (LayoutParams) child.getLayoutParams();
    if (p == null) {
        p = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, 0);
        child.setLayoutParams(p);/*www  .jav  a2 s  .  co  m*/
    }
    p.viewType = mAdapter.getItemViewType(position);
    p.forceAdd = true;

    final int childWidthSpec = ViewGroup.getChildMeasureSpec(widthMeasureSpec,
            mListPadding.left + mListPadding.right, p.width);
    final int lpHeight = p.height;
    int childHeightSpec;
    if (lpHeight > 0) {
        childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY);
    } else {
        childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
    }
    child.measure(childWidthSpec, childHeightSpec);
}

From source file:beichen.douban.ui.view.LazyViewPager.java

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    // For simple implementation, or internal size is always 0.
    // We depend on the container to specify the layout size of
    // our view. We can't really know what it is since we will be
    // adding and removing different arbitrary views and do not
    // want the layout to change as this happens.
    setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), getDefaultSize(0, heightMeasureSpec));

    // Children are just made to fill our space.
    int childWidthSize = getMeasuredWidth() - getPaddingLeft() - getPaddingRight();
    int childHeightSize = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();

    /*//from   www . j  a  v  a2s  .c o  m
     * Make sure all children have been properly measured. Decor views
     * first. Right now we cheat and make this less complicated by assuming
     * decor views won't intersect. We will pin to edges based on gravity.
     */
    int size = getChildCount();
    for (int i = 0; i < size; ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            if (lp != null && lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                Log.d(TAG, "gravity: " + lp.gravity + " hgrav: " + hgrav + " vgrav: " + vgrav);
                int widthMode = MeasureSpec.AT_MOST;
                int heightMode = MeasureSpec.AT_MOST;
                boolean consumeVertical = vgrav == Gravity.TOP || vgrav == Gravity.BOTTOM;
                boolean consumeHorizontal = hgrav == Gravity.LEFT || hgrav == Gravity.RIGHT;

                if (consumeVertical) {
                    widthMode = MeasureSpec.EXACTLY;
                } else if (consumeHorizontal) {
                    heightMode = MeasureSpec.EXACTLY;
                }

                final int widthSpec = MeasureSpec.makeMeasureSpec(childWidthSize, widthMode);
                final int heightSpec = MeasureSpec.makeMeasureSpec(childHeightSize, heightMode);
                child.measure(widthSpec, heightSpec);

                if (consumeVertical) {
                    childHeightSize -= child.getMeasuredHeight();
                } else if (consumeHorizontal) {
                    childWidthSize -= child.getMeasuredWidth();
                }
            }
        }
    }

    mChildWidthMeasureSpec = MeasureSpec.makeMeasureSpec(childWidthSize, MeasureSpec.EXACTLY);
    mChildHeightMeasureSpec = MeasureSpec.makeMeasureSpec(childHeightSize, MeasureSpec.EXACTLY);

    // Make sure we have created all fragments that we need to have shown.
    mInLayout = true;
    populate();
    mInLayout = false;

    // Page views next.
    size = getChildCount();
    for (int i = 0; i < size; ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            if (DEBUG)
                Log.v(TAG, "Measuring #" + i + " " + child + ": " + mChildWidthMeasureSpec);

            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            if (lp == null || !lp.isDecor) {
                child.measure(mChildWidthMeasureSpec, mChildHeightMeasureSpec);
            }
        }
    }
}

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

/**
 * Should be called with mPopulating set to true
 *
 * @param fromPosition Position to start filling from
 * @param overhang the number of extra pixels to fill beyond the current bottom edge
 * @return the max overhang beyond the end of the view of any added items at the bottom
 *//*ww w.  j av a 2  s.  co  m*/
final int fillDown(int fromPosition, int overhang) {
    final int paddingLeft = getPaddingLeft();
    final int paddingRight = getPaddingRight();
    final int itemMargin = mItemMargin;
    final int colWidth = (getWidth() - paddingLeft - paddingRight - itemMargin * (mColCount - 1)) / mColCount;
    final int gridBottom = getHeight() - getPaddingBottom();
    final int fillTo = gridBottom + overhang;
    int nextCol = getNextColumnDown();
    int position = fromPosition;

    while (nextCol >= 0 && mItemBottoms[nextCol] < fillTo && position < mItemCount) {
        final View child = obtainView(position, null);
        LayoutParams lp = (LayoutParams) child.getLayoutParams();

        if (child.getParent() != this) {
            if (mInLayout) {
                addViewInLayout(child, -1, lp);
            } else {
                addView(child);
            }
        }

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

        LayoutRecord rec;
        if (span > 1) {
            rec = getNextRecordDown(position, span);
            nextCol = rec.column;
        } else {
            rec = mLayoutRecords.get(position);
        }

        boolean invalidateAfter = false;
        if (rec == null) {
            rec = new LayoutRecord();
            mLayoutRecords.put(position, rec);
            rec.column = nextCol;
            rec.span = span;
        } else if (span != rec.span) {
            rec.span = span;
            rec.column = nextCol;
            invalidateAfter = true;
        } else {
            nextCol = rec.column;
        }

        if (mHasStableIds) {
            final long id = mAdapter.getItemId(position);
            rec.id = id;
            lp.id = id;
        }

        lp.column = nextCol;

        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);

        final int childHeight = child.getMeasuredHeight();
        if (invalidateAfter || (childHeight != rec.height && rec.height > 0)) {
            invalidateLayoutRecordsAfterPosition(position);
        }
        rec.height = childHeight;

        final int startFrom;
        if (span > 1) {
            int lowest = mItemBottoms[nextCol];
            for (int i = nextCol + 1; i < nextCol + span; i++) {
                final int bottom = mItemBottoms[i];
                if (bottom > lowest) {
                    lowest = bottom;
                }
            }
            startFrom = lowest;
        } else {
            startFrom = mItemBottoms[nextCol];
        }
        final int childTop = startFrom + itemMargin;
        final int childBottom = childTop + childHeight;
        final int childLeft = paddingLeft + nextCol * (colWidth + itemMargin);
        final int childRight = childLeft + child.getMeasuredWidth();
        child.layout(childLeft, childTop, childRight, childBottom);

        for (int i = nextCol; i < nextCol + span; i++) {
            mItemBottoms[i] = childBottom + rec.getMarginBelow(i - nextCol);
        }

        nextCol = getNextColumnDown();
        position++;
    }

    int lowestView = 0;
    for (int i = 0; i < mColCount; i++) {
        if (mItemBottoms[i] > lowestView) {
            lowestView = mItemBottoms[i];
        }
    }
    return lowestView - gridBottom;
}

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

/**
 * Should be called with mPopulating set to true
 *
 * @param fromPosition Position to start filling from
 * @param overhang the number of extra pixels to fill beyond the current top edge
 * @return the max overhang beyond the beginning of the view of any added items at the top
 *//* w  ww. ja  va2  s.  c om*/
final int fillUp(int fromPosition, int overhang) {
    final int paddingLeft = getPaddingLeft();
    final int paddingRight = getPaddingRight();
    final int itemMargin = mItemMargin;
    final int colWidth = (getWidth() - paddingLeft - paddingRight - itemMargin * (mColCount - 1)) / mColCount;
    final int gridTop = getPaddingTop();
    final int fillTo = gridTop - overhang;
    int nextCol = getNextColumnUp();
    int position = fromPosition;

    while (nextCol >= 0 && mItemTops[nextCol] > fillTo && position >= 0) {
        final View child = obtainView(position, null);
        LayoutParams lp = (LayoutParams) child.getLayoutParams();

        if (child.getParent() != this) {
            if (mInLayout) {
                addViewInLayout(child, 0, lp);
            } else {
                addView(child, 0);
            }
        }

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

        LayoutRecord rec;
        if (span > 1) {
            rec = getNextRecordUp(position, span);
            nextCol = rec.column;
        } else {
            rec = mLayoutRecords.get(position);
        }

        boolean invalidateBefore = false;
        if (rec == null) {
            rec = new LayoutRecord();
            mLayoutRecords.put(position, rec);
            rec.column = nextCol;
            rec.span = span;
        } else if (span != rec.span) {
            rec.span = span;
            rec.column = nextCol;
            invalidateBefore = true;
        } else {
            nextCol = rec.column;
        }

        if (mHasStableIds) {
            final long id = mAdapter.getItemId(position);
            rec.id = id;
            lp.id = id;
        }

        lp.column = nextCol;

        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);

        final int childHeight = child.getMeasuredHeight();
        if (invalidateBefore || (childHeight != rec.height && rec.height > 0)) {
            invalidateLayoutRecordsBeforePosition(position);
        }
        rec.height = childHeight;

        final int startFrom;
        if (span > 1) {
            int highest = mItemTops[nextCol];
            for (int i = nextCol + 1; i < nextCol + span; i++) {
                final int top = mItemTops[i];
                if (top < highest) {
                    highest = top;
                }
            }
            startFrom = highest;
        } else {
            startFrom = mItemTops[nextCol];
        }
        final int childBottom = startFrom;
        final int childTop = childBottom - childHeight;
        final int childLeft = paddingLeft + nextCol * (colWidth + itemMargin);
        final int childRight = childLeft + child.getMeasuredWidth();
        child.layout(childLeft, childTop, childRight, childBottom);

        for (int i = nextCol; i < nextCol + span; i++) {
            mItemTops[i] = childTop - rec.getMarginAbove(i - nextCol) - itemMargin;
        }

        nextCol = getNextColumnUp();
        mFirstPosition = position--;
    }

    int highestView = getHeight();
    for (int i = 0; i < mColCount; i++) {
        if (mItemTops[i] < highestView) {
            highestView = mItemTops[i];
        }
    }
    return gridTop - highestView;
}