@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
int x = getPaddingLeft();
final int y = getPaddingTop();
final int contentHeight = b - t - getPaddingTop() - getPaddingBottom();
if (contentHeight <= 0) {
// Nothing to do if we can't see anything.
return;
}
HomeView homeLayout = mExpandedActionView != null ? mExpandedHomeLayout : mHomeLayout;
if (homeLayout.getVisibility() != GONE) {
final int leftOffset = homeLayout.getLeftOffset();
x += positionChild(homeLayout, x + leftOffset, y, contentHeight) + leftOffset;
}
if (mExpandedActionView == null) {
final boolean showTitle =
mTitleLayout != null
&& mTitleLayout.getVisibility() != GONE
&& (mDisplayOptions & ActionBar.DISPLAY_SHOW_TITLE) != 0;
if (showTitle) {
x += positionChild(mTitleLayout, x, y, contentHeight);
}
switch (mNavigationMode) {
case ActionBar.NAVIGATION_MODE_STANDARD:
break;
case ActionBar.NAVIGATION_MODE_LIST:
if (mListNavLayout != null) {
if (showTitle) x += mItemPadding;
x += positionChild(mListNavLayout, x, y, contentHeight) + mItemPadding;
}
break;
case ActionBar.NAVIGATION_MODE_TABS:
if (mTabScrollView != null) {
if (showTitle) x += mItemPadding;
x += positionChild(mTabScrollView, x, y, contentHeight) + mItemPadding;
}
break;
}
}
int menuLeft = r - l - getPaddingRight();
if (mMenuView != null && mMenuView.getParent() == this) {
positionChildInverse(mMenuView, menuLeft, y, contentHeight);
menuLeft -= mMenuView.getMeasuredWidth();
}
if (mIndeterminateProgressView != null && mIndeterminateProgressView.getVisibility() != GONE) {
positionChildInverse(mIndeterminateProgressView, menuLeft, y, contentHeight);
menuLeft -= mIndeterminateProgressView.getMeasuredWidth();
}
View customView = null;
if (mExpandedActionView != null) {
customView = mExpandedActionView;
} else if ((mDisplayOptions & ActionBar.DISPLAY_SHOW_CUSTOM) != 0 && mCustomNavView != null) {
customView = mCustomNavView;
}
if (customView != null) {
ViewGroup.LayoutParams lp = customView.getLayoutParams();
final ActionBar.LayoutParams ablp =
lp instanceof ActionBar.LayoutParams ? (ActionBar.LayoutParams) lp : null;
final int gravity = ablp != null ? ablp.gravity : DEFAULT_CUSTOM_GRAVITY;
final int navWidth = customView.getMeasuredWidth();
int topMargin = 0;
int bottomMargin = 0;
if (ablp != null) {
x += ablp.leftMargin;
menuLeft -= ablp.rightMargin;
topMargin = ablp.topMargin;
bottomMargin = ablp.bottomMargin;
}
int hgravity = gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
// See if we actually have room to truly center; if not push against left or right.
if (hgravity == Gravity.CENTER_HORIZONTAL) {
final int centeredLeft = ((getRight() - getLeft()) - navWidth) / 2;
if (centeredLeft < x) {
hgravity = Gravity.LEFT;
} else if (centeredLeft + navWidth > menuLeft) {
hgravity = Gravity.RIGHT;
}
} else if (gravity == -1) {
hgravity = Gravity.LEFT;
}
int xpos = 0;
switch (hgravity) {
case Gravity.CENTER_HORIZONTAL:
xpos = ((getRight() - getLeft()) - navWidth) / 2;
break;
case Gravity.LEFT:
xpos = x;
break;
case Gravity.RIGHT:
xpos = menuLeft - navWidth;
break;
}
int vgravity = gravity & Gravity.VERTICAL_GRAVITY_MASK;
if (gravity == -1) {
vgravity = Gravity.CENTER_VERTICAL;
}
int ypos = 0;
switch (vgravity) {
case Gravity.CENTER_VERTICAL:
final int paddedTop = getPaddingTop();
final int paddedBottom = getBottom() - getTop() - getPaddingBottom();
ypos = ((paddedBottom - paddedTop) - customView.getMeasuredHeight()) / 2;
break;
case Gravity.TOP:
ypos = getPaddingTop() + topMargin;
break;
case Gravity.BOTTOM:
ypos = getHeight() - getPaddingBottom() - customView.getMeasuredHeight() - bottomMargin;
break;
}
final int customWidth = customView.getMeasuredWidth();
customView.layout(xpos, ypos, xpos + customWidth, ypos + customView.getMeasuredHeight());
x += customWidth;
}
if (mProgressView != null) {
mProgressView.bringToFront();
final int halfProgressHeight = mProgressView.getMeasuredHeight() / 2;
mProgressView.layout(
mProgressBarPadding,
-halfProgressHeight,
mProgressBarPadding + mProgressView.getMeasuredWidth(),
halfProgressHeight);
}
}
@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++;
}
}
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));
}
}