下面列出了android.view.View#isLayoutRequested ( ) 实例代码,或者点击链接到github查看源代码,也可以在右侧发表评论。
private void prepareContent() {
if (mAnimating) {
return;
}
// Something changed in the content, we need to honor the layout request
// before creating the cached bitmap
final View content = mContent;
if (content.isLayoutRequested()) {
measureContent();
}
// Try only once... we should really loop but it's not a big deal
// if the draw was cancelled, it will only be temporary anyway
content.getViewTreeObserver().dispatchOnPreDraw();
content.buildDrawingCache();
content.setVisibility(View.GONE);
}
private void prepareContent() {
if (mAnimating) {
return;
}
// Something changed in the content, we need to honor the layout request
// before creating the cached bitmap
View content = mContent;
if (content.isLayoutRequested()) {
measureContent();
}
// Try only once... we should really loop but it's not a big deal
// if the draw was cancelled, it will only be temporary anyway
content.getViewTreeObserver().dispatchOnPreDraw();
content.buildDrawingCache();
content.setVisibility(View.GONE);
}
/**
*
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final View child = getChildAt(0);
if (child == null) {
setMeasuredDimension(0, width);
return;
}
if (child.isLayoutRequested()) {
// Always let child be as tall as it wants.
measureChild(child, widthMeasureSpec,
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
}
if (heightMode == MeasureSpec.UNSPECIFIED) {
ViewGroup.LayoutParams lp = getLayoutParams();
if (lp.height > 0) {
height = lp.height;
} else {
height = child.getMeasuredHeight();
}
}
setMeasuredDimension(width, height);
}
/**
*
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final View child = getChildAt(0);
if (child == null) {
setMeasuredDimension(0, width);
return;
}
if (child.isLayoutRequested()) {
// Always let child be as tall as it wants.
measureChild(child, widthMeasureSpec,
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
}
if (heightMode == MeasureSpec.UNSPECIFIED) {
LayoutParams lp = getLayoutParams();
if (lp.height > 0) {
height = lp.height;
}
else {
height = child.getMeasuredHeight();
}
}
setMeasuredDimension(width, height);
}
/**
*
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final View child = getChildAt(0);
if (child == null) {
setMeasuredDimension(width, 0);
return;
}
if (child.isLayoutRequested()) {
// Always let child be as tall as it wants.
measureChild(child, widthMeasureSpec,
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
}
if (heightMode == MeasureSpec.UNSPECIFIED) {
ViewGroup.LayoutParams lp = getLayoutParams();
if (lp.height > 0) {
height = lp.height;
} else {
height = child.getMeasuredHeight();
}
}
setMeasuredDimension(width, height);
}
private void ensurePinnedHeaderLayout(View header) {
if (header.isLayoutRequested()) {
int widthSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), mWidthMode);
int heightSpec;
ViewGroup.LayoutParams layoutParams = header.getLayoutParams();
if (layoutParams != null && layoutParams.height > 0) {
heightSpec = MeasureSpec.makeMeasureSpec(layoutParams.height, MeasureSpec.EXACTLY);
} else {
heightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
}
header.measure(widthSpec, heightSpec);
header.layout(0, 0, header.getMeasuredWidth(), header.getMeasuredHeight());
}
}
/**
*
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final View child = getChildAt(0);
if (child == null) {
setMeasuredDimension(0, width);
return;
}
if (child.isLayoutRequested()) {
// Always let child be as tall as it wants.
measureChild(child, widthMeasureSpec,
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
}
if (heightMode == MeasureSpec.UNSPECIFIED) {
ViewGroup.LayoutParams lp = getLayoutParams();
if (lp.height > 0) {
height = lp.height;
} else {
height = child.getMeasuredHeight();
}
}
setMeasuredDimension(width, height);
}
private void ensurePinnedHeaderLayout(View header, boolean forceLayout) {
if (header.isLayoutRequested() || forceLayout) {
int widthSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), mWidthMode);
int heightSpec;
ViewGroup.LayoutParams layoutParams = header.getLayoutParams();
if (layoutParams != null && layoutParams.height > 0) {
heightSpec = MeasureSpec.makeMeasureSpec(layoutParams.height, MeasureSpec.EXACTLY);
} else {
heightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
}
header.measure(widthSpec, heightSpec);
header.layout(0, 0, header.getMeasuredWidth(), header.getMeasuredHeight());
}
}
protected void makeAndAddCellView(int left, int top, int index) {
final boolean recycled = !scrapTitleViews.isEmpty();
final View child = recycled ? (scrapTitleViews.remove(0)) : (adapter.createTitleView(this));
adapter.bindTitleView(child, index);
LayoutParams lp = child.getLayoutParams();
if(lp == null){
lp = new LayoutParams(titleWidth, titleHeight);
}
if(recycled){
attachViewToParent(child, index, lp);
}else{
addViewInLayout(child, index, lp, true);
}
final boolean needToMeasure = !recycled || child.isLayoutRequested();
if (needToMeasure) {
final int childWidthSpec = getChildMeasureSpec(
MeasureSpec.makeMeasureSpec(titleWidth, MeasureSpec.EXACTLY), 0, lp.width);
final int childHeightSpec = getChildMeasureSpec(
MeasureSpec.makeMeasureSpec(titleHeight, MeasureSpec.EXACTLY), 0, lp.height);
child.measure(childWidthSpec, childHeightSpec);
} else {
cleanupLayoutState(child);
}
if (needToMeasure) {
child.layout(left, top,left + titleWidth, top + titleHeight);
} else {
child.offsetLeftAndRight(left - child.getLeft());
child.offsetTopAndBottom(top - child.getTop());
}
}
/**
* @param left
* @param top
* @param index
*/
protected void makeAndAddCellView(int left, int top, int index) {
final boolean recycled = !scrapCellViews.isEmpty();
final View child = recycled ? (scrapCellViews.remove(0)) : (adapter.createCellView(this, index));
adapter.bindCellView(this, child, index, calendar);
LayoutParams lp = child.getLayoutParams();
if(lp == null){
lp = new LayoutParams(cellWidth, cellHeight);
}
if(recycled){
attachViewToParent(child, index, lp);
}else{
addViewInLayout(child, index, lp, true);
}
final boolean needToMeasure = !recycled || child.isLayoutRequested();
if (needToMeasure) {
final int childWidthSpec = getChildMeasureSpec(
MeasureSpec.makeMeasureSpec(cellWidth, MeasureSpec.EXACTLY), 0, lp.width);
final int childHeightSpec = getChildMeasureSpec(
MeasureSpec.makeMeasureSpec(cellHeight, MeasureSpec.EXACTLY), 0, lp.height);
child.measure(childWidthSpec, childHeightSpec);
} else {
cleanupLayoutState(child);
}
if (needToMeasure) {
child.layout(left, top,left + cellWidth, top + cellHeight);
} else {
child.offsetLeftAndRight(left - child.getLeft());
child.offsetTopAndBottom(top - child.getTop());
}
}
/**
*
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final View child = getChildAt(0);
if (child == null) {
setMeasuredDimension(0, width);
return;
}
if (child.isLayoutRequested()) {
// Always let child be as tall as it wants.
measureChild(child, widthMeasureSpec,
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
}
if (heightMode == MeasureSpec.UNSPECIFIED) {
LayoutParams lp = getLayoutParams();
if (lp.height > 0) {
height = lp.height;
} else {
height = child.getMeasuredHeight();
}
}
setMeasuredDimension(width, height);
}
/**
*
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final View child = getChildAt(0);
if (child == null) {
setMeasuredDimension(0, width);
return;
}
if (child.isLayoutRequested()) {
// Always let child be as tall as it wants.
measureChild(child, widthMeasureSpec,
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
}
if (heightMode == MeasureSpec.UNSPECIFIED) {
LayoutParams lp = getLayoutParams();
if (lp.height > 0) {
height = lp.height;
} else {
height = child.getMeasuredHeight();
}
}
setMeasuredDimension(width, height);
}
/**
* Get the position rect for the given child. If the child has currently requested layout
* or has a visibility of GONE.
*
* @param child child view to check
* @param transform true to include transformation in the output rect, false to
* only account for the base position
* @param out rect to set to the output values
*/
void getChildRect(View child, boolean transform, Rect out) {
if (child.isLayoutRequested() || child.getVisibility() == View.GONE) {
out.set(0, 0, 0, 0);
return;
}
if (transform) {
getDescendantRect(child, out);
} else {
out.set(child.getLeft(), child.getTop(), child.getRight(), child.getBottom());
}
}
/**
*
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final View child = getChildAt(0);
if (child == null) {
setMeasuredDimension(0, width);
return;
}
if (child.isLayoutRequested()) {
// Always let child be as tall as it wants.
measureChild(child, widthMeasureSpec,
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
}
if (heightMode == MeasureSpec.UNSPECIFIED) {
ViewGroup.LayoutParams lp = getLayoutParams();
if (lp.height > 0) {
height = lp.height;
} else {
height = child.getMeasuredHeight();
}
}
setMeasuredDimension(width, height);
}
/**
*
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final View child = getChildAt(0);
if (child == null) {
setMeasuredDimension(0, width);
return;
}
if (child.isLayoutRequested()) {
// Always let child be as tall as it wants.
measureChild(child, widthMeasureSpec,
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
}
if (heightMode == MeasureSpec.UNSPECIFIED) {
ViewGroup.LayoutParams lp = getLayoutParams();
if (lp.height > 0) {
height = lp.height;
} else {
height = child.getMeasuredHeight();
}
}
setMeasuredDimension(width, height);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
if(adapter != null){
final boolean existed = getChildCount() > 0;
if(existed){
setMeasuredDimension(cellWidth, cellHeight);
return;
}
final boolean recycled = ! scrapViews.isEmpty();
final View child = recycled ? (scrapViews.get(0)) : (adapter.createView(this, 0));
LayoutParams lp = child.getLayoutParams();
if(lp == null){
lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
}
if(recycled){
attachViewToParent(child, 0, lp);
}else{
addViewInLayout(child, 0, lp, true);
}
final boolean needToMeasure = !recycled || child.isLayoutRequested();
if (needToMeasure) {
final int childWidthSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.AT_MOST);
final int childHeightSpec = MeasureSpec.makeMeasureSpec(heightSize, MeasureSpec.AT_MOST);
child.measure(childWidthSpec, childHeightSpec);
}
cellWidth = child.getMeasuredWidth();
cellHeight = child.getMeasuredHeight();
cellWidthWithPadding = cellWidth + cellPadding;
widthSize = cellWidth;
heightSize = cellHeight;
detachViewFromParent(child);
if(! recycled){
scrapViews.add(child);
}
setMeasuredDimension(widthSize, heightSize);
}else{
setMeasuredDimension(widthSize, (int) (widthSize * (6f / 7)));
}
}
@TargetApi(11)
private void setupChild(View child, int position, int x, boolean flowDown, int childrenTop, boolean selected, boolean recycled) {
boolean isSelected = selected && shouldShowSelector();
boolean updateChildSelected = isSelected != child.isSelected();
int mode = this.mTouchMode;
boolean isPressed = mode > 0 && mode < 3 && this.mMotionPosition == position;
boolean updateChildPressed = isPressed != child.isPressed();
boolean needToMeasure = !recycled || updateChildSelected || child.isLayoutRequested();
LayoutParams p = (LayoutParams) child.getLayoutParams();
if (p == null) {
p = (LayoutParams) generateDefaultLayoutParams();
}
p.viewType = this.mAdapter.getItemViewType(position);
if ((!recycled || p.forceAdd) && !(p.recycledHeaderFooter && p.viewType == -2)) {
p.forceAdd = false;
if (p.viewType == -2) {
p.recycledHeaderFooter = true;
}
addViewInLayout(child, flowDown ? -1 : 0, p, true);
} else {
attachViewToParent(child, flowDown ? -1 : 0, p);
}
if (updateChildSelected) {
child.setSelected(isSelected);
}
if (updateChildPressed) {
child.setPressed(isPressed);
}
if (!(this.mChoiceMode == 0 || this.mCheckStates == null)) {
if (child instanceof Checkable) {
((Checkable) child).setChecked(((Boolean) this.mCheckStates.get(position, Boolean.valueOf(false))).booleanValue());
} else if (VERSION.SDK_INT >= 11) {
child.setActivated(((Boolean) this.mCheckStates.get(position, Boolean.valueOf(false))).booleanValue());
}
}
if (needToMeasure) {
int childWidthSpec;
int childHeightSpec = ViewGroup.getChildMeasureSpec(this.mHeightMeasureSpec, this.mListPadding.top + this.mListPadding.bottom, p.height);
int lpWidth = p.width;
if (lpWidth > 0) {
childWidthSpec = MeasureSpec.makeMeasureSpec(lpWidth, 1073741824);
} else {
childWidthSpec = MeasureSpec.makeMeasureSpec(0, 0);
}
child.measure(childWidthSpec, childHeightSpec);
} else {
cleanupLayoutState(child);
}
int w = child.getMeasuredWidth();
int h = child.getMeasuredHeight();
int childLeft = flowDown ? x : x - w;
if (needToMeasure) {
child.layout(childLeft, childrenTop, childLeft + w, childrenTop + h);
} else {
child.offsetLeftAndRight(childLeft - child.getLeft());
child.offsetTopAndBottom(childrenTop - child.getTop());
}
if (this.mCachingStarted && !child.isDrawingCacheEnabled()) {
child.setDrawingCacheEnabled(true);
}
if (VERSION.SDK_INT >= 11 && recycled && ((LayoutParams) child.getLayoutParams()).scrappedFromPosition != position) {
child.jumpDrawablesToCurrentState();
}
}
/**
* 绘制子View
*
* @param index
* @param child
*/
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private void makeAndAddView(int index, View child) {
FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) child.getLayoutParams();
addViewInLayout(child, 0, lp, true);
final boolean needToMeasure = child.isLayoutRequested();
if (needToMeasure) {
int childWidthSpec = getChildMeasureSpec(getWidthMeasureSpec(), getPaddingLeft() + getPaddingRight() + lp.leftMargin + lp.rightMargin, lp.width);
int childHeightSpec = getChildMeasureSpec(getHeightMeasureSpec(), getPaddingTop() + getPaddingBottom() + lp.topMargin + lp.bottomMargin, lp.height);
child.measure(childWidthSpec, childHeightSpec);
} else {
cleanupLayoutState(child);
}
int w = child.getMeasuredWidth();
int h = child.getMeasuredHeight();
int gravity = lp.gravity;
if (gravity == -1) {
gravity = Gravity.TOP | Gravity.START;
}
int layoutDirection = getLayoutDirection();
final int absoluteGravity = Gravity.getAbsoluteGravity(gravity, layoutDirection);
final int verticalGravity = gravity & Gravity.VERTICAL_GRAVITY_MASK;
int childLeft;
int childTop;
switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
case Gravity.CENTER_HORIZONTAL:
childLeft = (getWidth() + getPaddingLeft() - getPaddingRight() - w) / 2 + lp.leftMargin - lp.rightMargin;
break;
case Gravity.END:
childLeft = getWidth() + getPaddingRight() - w - lp.rightMargin;
break;
case Gravity.START:
default:
int l = 0;
childLeft = getPaddingLeft() + lp.leftMargin + l;
break;
}
switch (verticalGravity) {
case Gravity.CENTER_VERTICAL:
childTop = (getHeight() + getPaddingTop() - getPaddingBottom() - h) / 2 +
lp.topMargin - lp.bottomMargin;
break;
case Gravity.BOTTOM:
childTop = getHeight() - getPaddingBottom() - h - lp.bottomMargin;
break;
case Gravity.TOP:
default:
int top = 0;
childTop = getPaddingTop() + lp.topMargin + top;
break;
}
child.layout(childLeft, childTop, childLeft + w, childTop + h);
adjustChildView(child, index);
}
private void makeAndAddView(View child, int index) {
child.setAlpha(1F);
child.setTranslationX(0);
FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) child.getLayoutParams();
addViewInLayout(child, 0, lp, true);
final boolean needToMeasure = child.isLayoutRequested();
if (needToMeasure) {
int childWidthSpec = getChildMeasureSpec(widthMeasureSpec,
getPaddingLeft() + getPaddingRight() + lp.leftMargin + lp.rightMargin,
lp.width);
int childHeightSpec = getChildMeasureSpec(heightMeasureSpec,
getPaddingTop() + getPaddingBottom() + lp.topMargin + lp.bottomMargin,
lp.height);
child.measure(childWidthSpec, childHeightSpec);
} else {
cleanupLayoutState(child);
}
int w = child.getMeasuredWidth();
int h = child.getMeasuredHeight();
int gravity = lp.gravity;
if (gravity == -1) {
gravity = Gravity.TOP | Gravity.START;
}
int layoutDirection = 0;
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN)
layoutDirection = getLayoutDirection();
final int absoluteGravity = Gravity.getAbsoluteGravity(gravity, layoutDirection);
final int verticalGravity = gravity & Gravity.VERTICAL_GRAVITY_MASK;
int childLeft;
int childTop;
switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
case Gravity.CENTER_HORIZONTAL:
childLeft = (getWidth() + getPaddingLeft() - getPaddingRight() - w) / 2 +
lp.leftMargin - lp.rightMargin;
break;
case Gravity.END:
childLeft = getWidth() + getPaddingRight() - w - lp.rightMargin;
break;
case Gravity.START:
default:
childLeft = getPaddingLeft() + lp.leftMargin;
break;
}
switch (verticalGravity) {
case Gravity.CENTER_VERTICAL:
childTop = (getHeight() + getPaddingTop() - getPaddingBottom() - h) / 2 +
lp.topMargin - lp.bottomMargin;
break;
case Gravity.BOTTOM:
childTop = getHeight() - getPaddingBottom() - h - lp.bottomMargin;
break;
case Gravity.TOP:
default:
childTop = getPaddingTop() + lp.topMargin;
break;
}
child.layout(childLeft, childTop, childLeft + w, childTop + h);
// 缩放层叠效果
adjustChildView(child, index);
}
/**
* Add a view as a child and make sure it is measured (if necessary) and
* positioned properly.
*
* @param child The view to add
* @param position The position of the view
* @param y The y position relative to which this view will be positioned
* @param flow if true, align top edge to y. If false, align bottom edge
* to y.
* @param childrenLeft Left edge where children should be positioned
* @param selected Is this position selected?
* @param recycled Has this view been pulled from the recycle bin? If so it
* does not need to be remeasured.
* @param where Where to add the item in the list
*
*/
private void setupChild(View child, int position, int y, boolean flow, int childrenLeft,
boolean selected, boolean recycled, int where) {
boolean isSelected = selected && shouldShowSelector();
final boolean updateChildSelected = isSelected != child.isSelected();
final int mode = mTouchMode;
final boolean isPressed = mode > TOUCH_MODE_DOWN && mode < TOUCH_MODE_SCROLL &&
mMotionPosition == position;
final boolean updateChildPressed = isPressed != child.isPressed();
boolean needToMeasure = !recycled || updateChildSelected || child.isLayoutRequested();
// Respect layout params that are already in the view. Otherwise make
// some up...
TwoWayAbsListView.LayoutParams p = (TwoWayAbsListView.LayoutParams)child.getLayoutParams();
if (p == null) {
p = new TwoWayAbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT, 0);
}
p.viewType = mAdapter.getItemViewType(position);
if (recycled && !p.forceAdd) {
attachViewToParent(child, where, p);
} else {
p.forceAdd = false;
addViewInLayout(child, where, p, true);
}
if (updateChildSelected) {
child.setSelected(isSelected);
if (isSelected) {
requestFocus();
}
}
if (updateChildPressed) {
child.setPressed(isPressed);
}
if (needToMeasure) {
int childHeightSpec = ViewGroup.getChildMeasureSpec(
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 0, p.height);
int childWidthSpec = ViewGroup.getChildMeasureSpec(
MeasureSpec.makeMeasureSpec(mColumnWidth, MeasureSpec.EXACTLY), 0, p.width);
child.measure(childWidthSpec, childHeightSpec);
} else {
cleanupLayoutState(child);
}
final int w = child.getMeasuredWidth();
final int h = child.getMeasuredHeight();
int childLeft;
final int childTop = flow ? y : y - h;
switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
case Gravity.LEFT:
childLeft = childrenLeft;
break;
case Gravity.CENTER_HORIZONTAL:
childLeft = childrenLeft + ((mColumnWidth - w) / 2);
break;
case Gravity.RIGHT:
childLeft = childrenLeft + mColumnWidth - w;
break;
default:
childLeft = childrenLeft;
break;
}
if (needToMeasure) {
final int childRight = childLeft + w;
final int childBottom = childTop + h;
child.layout(childLeft, childTop, childRight, childBottom);
} else {
child.offsetLeftAndRight(childLeft - child.getLeft());
child.offsetTopAndBottom(childTop - child.getTop());
}
if (mCachingStarted) {
child.setDrawingCacheEnabled(true);
}
}