Example usage for android.view Gravity HORIZONTAL_GRAVITY_MASK

Introduction

In this page you can find the example usage for android.view Gravity HORIZONTAL_GRAVITY_MASK.

Prototype

int HORIZONTAL_GRAVITY_MASK

To view the source code for android.view Gravity HORIZONTAL_GRAVITY_MASK.

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Document

Binary mask to get the absolute horizontal gravity of a gravity.

Usage

From source file:com.tylz.jiaoyanglogistics.view.LazyViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;//from w w w .j a v  a  2  s  . c  o m
    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;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            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;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;
                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;
    mFirstLayout = false;
}

---

From source file:com.chenglong.muscle.ui.LazyViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;/* ww  w  .  jav  a 2  s  .c  o m*/
    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;
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            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;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;
                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;
    mFirstLayout = false;
}

---

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

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

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            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;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;
                //                       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;
    mFirstLayout = false;
}

---

From source file:administrator.example.com.myscrollview.VerticalViewPager.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   ww  w.j  a v a2  s  . co 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;
                } /* end of if */

                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();
                } /* end of if */
            } /* end of if */
        } /* end of if */
    } /* end of for */

    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);
            } /* end of if */
        } /* end of if */
    } /* end of for */
}

---

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

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

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            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;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;
                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;
    mFirstLayout = false;
}

---

From source file:javalibrary.android.ui.VerticalViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;//  w  ww.  java2s. 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();
    final int scrollY = getScrollY();

    int decorCount = 0;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            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;
                childTop += scrollY;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                /*int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;*/
                int loff = (height + mPageMargin) * ii.position;
                childLeft = paddingLeft;
                childTop = paddingTop + loff;
                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;
    mFirstLayout = false;
}

---

From source file:com.example.view.VerticalViewPager.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 ww . ja  v  a2  s . 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;
                } /* end of if */

                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();
                } /* end of if */
            } /* end of if */
        } /* end of if */
    } /* end of for */

    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);
            } /* end of if */
        } /* end of if */
    } /* end of for */
}

---

From source file:org.immopoly.android.widget.ViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;//from   w  ww.  j  ava  2 s .c o m
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = forcedChildWidth > 0 ? forcedChildWidth : 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;

    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            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;
                decorCount++;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            } else if ((ii = infoForChild(child)) != null) {
                int loff = (width + mPageMargin) * ii.position;
                childLeft = paddingLeft + loff;
                childTop = paddingTop;
                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;
    mFirstLayout = false;
}

---

From source file:com.actionbarsherlock.internal.widget.ActionBarView.java

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    final int childCount = getChildCount();
    if (mIsCollapsable) {
        int visibleChildren = 0;
        for (int i = 0; i < childCount; i++) {
            final View child = getChildAt(i);
            if (child.getVisibility() != GONE && !(child == mMenuView && mMenuView.getChildCount() == 0)) {
                visibleChildren++;/*from   w w w  .  java 2 s .  c  o  m*/
            }
        }

        if (visibleChildren == 0) {
            // No size for an empty action bar when collapsable.
            setMeasuredDimension(0, 0);
            mIsCollapsed = true;
            return;
        }
    }
    mIsCollapsed = false;

    int widthMode = MeasureSpec.getMode(widthMeasureSpec);
    if (widthMode != MeasureSpec.EXACTLY) {
        throw new IllegalStateException(getClass().getSimpleName() + " can only be used "
                + "with android:layout_width=\"match_parent\" (or fill_parent)");
    }

    int heightMode = MeasureSpec.getMode(heightMeasureSpec);
    if (heightMode != MeasureSpec.AT_MOST) {
        throw new IllegalStateException(getClass().getSimpleName() + " can only be used "
                + "with android:layout_height=\"wrap_content\"");
    }

    int contentWidth = MeasureSpec.getSize(widthMeasureSpec);

    int maxHeight = mContentHeight > 0 ? mContentHeight : MeasureSpec.getSize(heightMeasureSpec);

    final int verticalPadding = getPaddingTop() + getPaddingBottom();
    final int paddingLeft = getPaddingLeft();
    final int paddingRight = getPaddingRight();
    final int height = maxHeight - verticalPadding;
    final int childSpecHeight = MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST);

    int availableWidth = contentWidth - paddingLeft - paddingRight;
    int leftOfCenter = availableWidth / 2;
    int rightOfCenter = leftOfCenter;

    HomeView homeLayout = mExpandedActionView != null ? mExpandedHomeLayout : mHomeLayout;

    if (homeLayout.getVisibility() != GONE) {
        final ViewGroup.LayoutParams lp = homeLayout.getLayoutParams();
        int homeWidthSpec;
        if (lp.width < 0) {
            homeWidthSpec = MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST);
        } else {
            homeWidthSpec = MeasureSpec.makeMeasureSpec(lp.width, MeasureSpec.EXACTLY);
        }
        homeLayout.measure(homeWidthSpec, MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
        final int homeWidth = homeLayout.getMeasuredWidth() + homeLayout.getLeftOffset();
        availableWidth = Math.max(0, availableWidth - homeWidth);
        leftOfCenter = Math.max(0, availableWidth - homeWidth);
    }

    if (mMenuView != null && mMenuView.getParent() == this) {
        availableWidth = measureChildView(mMenuView, availableWidth, childSpecHeight, 0);
        rightOfCenter = Math.max(0, rightOfCenter - mMenuView.getMeasuredWidth());
    }

    if (mIndeterminateProgressView != null && mIndeterminateProgressView.getVisibility() != GONE) {
        availableWidth = measureChildView(mIndeterminateProgressView, availableWidth, childSpecHeight, 0);
        rightOfCenter = Math.max(0, rightOfCenter - mIndeterminateProgressView.getMeasuredWidth());
    }

    final boolean showTitle = mTitleLayout != null && mTitleLayout.getVisibility() != GONE
            && (mDisplayOptions & ActionBar.DISPLAY_SHOW_TITLE) != 0;

    if (mExpandedActionView == null) {
        switch (mNavigationMode) {
        case ActionBar.NAVIGATION_MODE_LIST:
            if (mListNavLayout != null) {
                final int itemPaddingSize = showTitle ? mItemPadding * 2 : mItemPadding;
                availableWidth = Math.max(0, availableWidth - itemPaddingSize);
                leftOfCenter = Math.max(0, leftOfCenter - itemPaddingSize);
                mListNavLayout.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST),
                        MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
                final int listNavWidth = mListNavLayout.getMeasuredWidth();
                availableWidth = Math.max(0, availableWidth - listNavWidth);
                leftOfCenter = Math.max(0, leftOfCenter - listNavWidth);
            }
            break;
        case ActionBar.NAVIGATION_MODE_TABS:
            if (mTabScrollView != null) {
                final int itemPaddingSize = showTitle ? mItemPadding * 2 : mItemPadding;
                availableWidth = Math.max(0, availableWidth - itemPaddingSize);
                leftOfCenter = Math.max(0, leftOfCenter - itemPaddingSize);
                mTabScrollView.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST),
                        MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
                final int tabWidth = mTabScrollView.getMeasuredWidth();
                availableWidth = Math.max(0, availableWidth - tabWidth);
                leftOfCenter = Math.max(0, leftOfCenter - tabWidth);
            }
            break;
        }
    }

    View customView = null;
    if (mExpandedActionView != null) {
        customView = mExpandedActionView;
    } else if ((mDisplayOptions & ActionBar.DISPLAY_SHOW_CUSTOM) != 0 && mCustomNavView != null) {
        customView = mCustomNavView;
    }

    if (customView != null) {
        final ViewGroup.LayoutParams lp = generateLayoutParams(customView.getLayoutParams());
        final ActionBar.LayoutParams ablp = lp instanceof ActionBar.LayoutParams ? (ActionBar.LayoutParams) lp
                : null;

        int horizontalMargin = 0;
        int verticalMargin = 0;
        if (ablp != null) {
            horizontalMargin = ablp.leftMargin + ablp.rightMargin;
            verticalMargin = ablp.topMargin + ablp.bottomMargin;
        }

        // If the action bar is wrapping to its content height, don't allow a custom
        // view to MATCH_PARENT.
        int customNavHeightMode;
        if (mContentHeight <= 0) {
            customNavHeightMode = MeasureSpec.AT_MOST;
        } else {
            customNavHeightMode = lp.height != LayoutParams.WRAP_CONTENT ? MeasureSpec.EXACTLY
                    : MeasureSpec.AT_MOST;
        }
        final int customNavHeight = Math.max(0,
                (lp.height >= 0 ? Math.min(lp.height, height) : height) - verticalMargin);

        final int customNavWidthMode = lp.width != LayoutParams.WRAP_CONTENT ? MeasureSpec.EXACTLY
                : MeasureSpec.AT_MOST;
        int customNavWidth = Math.max(0,
                (lp.width >= 0 ? Math.min(lp.width, availableWidth) : availableWidth) - horizontalMargin);
        final int hgrav = (ablp != null ? ablp.gravity : DEFAULT_CUSTOM_GRAVITY)
                & Gravity.HORIZONTAL_GRAVITY_MASK;

        // Centering a custom view is treated specially; we try to center within the whole
        // action bar rather than in the available space.
        if (hgrav == Gravity.CENTER_HORIZONTAL && lp.width == LayoutParams.MATCH_PARENT) {
            customNavWidth = Math.min(leftOfCenter, rightOfCenter) * 2;
        }

        customView.measure(MeasureSpec.makeMeasureSpec(customNavWidth, customNavWidthMode),
                MeasureSpec.makeMeasureSpec(customNavHeight, customNavHeightMode));
        availableWidth -= horizontalMargin + customView.getMeasuredWidth();
    }

    if (mExpandedActionView == null && showTitle) {
        availableWidth = measureChildView(mTitleLayout, availableWidth,
                MeasureSpec.makeMeasureSpec(mContentHeight, MeasureSpec.EXACTLY), 0);
        leftOfCenter = Math.max(0, leftOfCenter - mTitleLayout.getMeasuredWidth());
    }

    if (mContentHeight <= 0) {
        int measuredHeight = 0;
        for (int i = 0; i < childCount; i++) {
            View v = getChildAt(i);
            int paddedViewHeight = v.getMeasuredHeight() + verticalPadding;
            if (paddedViewHeight > measuredHeight) {
                measuredHeight = paddedViewHeight;
            }
        }
        setMeasuredDimension(contentWidth, measuredHeight);
    } else {
        setMeasuredDimension(contentWidth, maxHeight);
    }

    if (mContextView != null) {
        mContextView.setContentHeight(getMeasuredHeight());
    }

    if (mProgressView != null && mProgressView.getVisibility() != GONE) {
        mProgressView.measure(
                MeasureSpec.makeMeasureSpec(contentWidth - mProgressBarPadding * 2, MeasureSpec.EXACTLY),
                MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.AT_MOST));
    }
}

---

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

/**
 * @param gravity the gravity of the child to return. If specified as a
 *            relative value, it will be resolved according to the current
 *            layout direction.//from  ww w .j  a v a2s.co m
 * @return the drawer with the specified gravity
 */
View findDrawerWithGravity(int gravity) {
    final int absHorizGravity = GravityCompat.getAbsoluteGravity(gravity, ViewCompat.getLayoutDirection(this))
            & Gravity.HORIZONTAL_GRAVITY_MASK;
    final int absVerticalGravity = GravityCompat.getAbsoluteGravity(gravity,
            ViewCompat.getLayoutDirection(this)) & Gravity.VERTICAL_GRAVITY_MASK;
    final int childCount = getChildCount();
    for (int i = 0; i < childCount; i++) {
        final View child = getChildAt(i);
        final int childAbsGravity = getDrawerViewAbsoluteGravity(child);
        boolean h = (absHorizGravity != 0)
                && ((childAbsGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == absHorizGravity);
        boolean v = (absVerticalGravity != 0)
                && ((childAbsGravity & Gravity.VERTICAL_GRAVITY_MASK) == absVerticalGravity);
        if (h || v) {
            return child;
        }
    }
    return null;
}

---

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