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@SeniorZhai
Last active May 9, 2016 08:42
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Toolbar
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final boolean isRtl = ViewCompat.getLayoutDirection(this) == ViewCompat.LAYOUT_DIRECTION_RTL;
final int width = getWidth();
final int height = getHeight();
final int paddingLeft = getPaddingLeft();
final int paddingRight = getPaddingRight();
final int paddingTop = getPaddingTop();
final int paddingBottom = getPaddingBottom();
int left = paddingLeft;
int right = width - paddingRight;
final int[] collapsingMargins = mTempMargins;
collapsingMargins[0] = collapsingMargins[1] = 0;
// Align views within the minimum toolbar height, if set.
final int alignmentHeight = ViewCompat.getMinimumHeight(this);
if (shouldLayout(mNavButtonView)) {
if (isRtl) {
right = layoutChildRight(mNavButtonView, right, collapsingMargins,
alignmentHeight);
} else {
left = layoutChildLeft(mNavButtonView, left, collapsingMargins,
alignmentHeight);
}
}
if (shouldLayout(mCollapseButtonView)) {
if (isRtl) {
right = layoutChildRight(mCollapseButtonView, right, collapsingMargins,
alignmentHeight);
} else {
left = layoutChildLeft(mCollapseButtonView, left, collapsingMargins,
alignmentHeight);
}
}
if (shouldLayout(mMenuView)) {
if (isRtl) {
left = layoutChildLeft(mMenuView, left, collapsingMargins,
alignmentHeight);
} else {
right = layoutChildRight(mMenuView, right, collapsingMargins,
alignmentHeight);
}
}
collapsingMargins[0] = Math.max(0, getContentInsetLeft() - left);
collapsingMargins[1] = Math.max(0, getContentInsetRight() - (width - paddingRight - right));
left = Math.max(left, getContentInsetLeft());
right = Math.min(right, width - paddingRight - getContentInsetRight());
if (shouldLayout(mExpandedActionView)) {
if (isRtl) {
right = layoutChildRight(mExpandedActionView, right, collapsingMargins,
alignmentHeight);
} else {
left = layoutChildLeft(mExpandedActionView, left, collapsingMargins,
alignmentHeight);
}
}
if (shouldLayout(mLogoView)) {
if (isRtl) {
right = layoutChildRight(mLogoView, right, collapsingMargins,
alignmentHeight);
} else {
left = layoutChildLeft(mLogoView, left, collapsingMargins,
alignmentHeight);
}
}
final boolean layoutTitle = shouldLayout(mTitleTextView);
final boolean layoutSubtitle = shouldLayout(mSubtitleTextView);
int titleHeight = 0;
if (layoutTitle) {
final LayoutParams lp = (LayoutParams) mTitleTextView.getLayoutParams();
titleHeight += lp.topMargin + mTitleTextView.getMeasuredHeight() + lp.bottomMargin;
}
if (layoutSubtitle) {
final LayoutParams lp = (LayoutParams) mSubtitleTextView.getLayoutParams();
titleHeight += lp.topMargin + mSubtitleTextView.getMeasuredHeight() + lp.bottomMargin;
}
if (layoutTitle || layoutSubtitle) {
int titleTop;
final View topChild = layoutTitle ? mTitleTextView : mSubtitleTextView;
final View bottomChild = layoutSubtitle ? mSubtitleTextView : mTitleTextView;
final LayoutParams toplp = (LayoutParams) topChild.getLayoutParams();
final LayoutParams bottomlp = (LayoutParams) bottomChild.getLayoutParams();
final boolean titleHasWidth = layoutTitle && mTitleTextView.getMeasuredWidth() > 0
|| layoutSubtitle && mSubtitleTextView.getMeasuredWidth() > 0;
switch (mGravity & Gravity.VERTICAL_GRAVITY_MASK) {
case Gravity.TOP:
titleTop = getPaddingTop() + toplp.topMargin + mTitleMarginTop;
break;
default:
case Gravity.CENTER_VERTICAL:
final int space = height - paddingTop - paddingBottom;
int spaceAbove = (space - titleHeight) / 2;
if (spaceAbove < toplp.topMargin + mTitleMarginTop) {
spaceAbove = toplp.topMargin + mTitleMarginTop;
} else {
final int spaceBelow = height - paddingBottom - titleHeight -
spaceAbove - paddingTop;
if (spaceBelow < toplp.bottomMargin + mTitleMarginBottom) {
spaceAbove = Math.max(0, spaceAbove -
(bottomlp.bottomMargin + mTitleMarginBottom - spaceBelow));
}
}
titleTop = paddingTop + spaceAbove;
break;
case Gravity.BOTTOM:
titleTop = height - paddingBottom - bottomlp.bottomMargin - mTitleMarginBottom -
titleHeight;
break;
}
if (isRtl) {
final int rd = (titleHasWidth ? mTitleMarginStart : 0) - collapsingMargins[1];
right -= Math.max(0, rd);
collapsingMargins[1] = Math.max(0, -rd);
int titleRight = right;
int subtitleRight = right;
if (layoutTitle) {
final LayoutParams lp = (LayoutParams) mTitleTextView.getLayoutParams();
final int titleLeft = titleRight - mTitleTextView.getMeasuredWidth();
final int titleBottom = titleTop + mTitleTextView.getMeasuredHeight();
mTitleTextView.layout(titleLeft, titleTop, titleRight, titleBottom);
titleRight = titleLeft - mTitleMarginEnd;
titleTop = titleBottom + lp.bottomMargin;
}
if (layoutSubtitle) {
final LayoutParams lp = (LayoutParams) mSubtitleTextView.getLayoutParams();
titleTop += lp.topMargin;
final int subtitleLeft = subtitleRight - mSubtitleTextView.getMeasuredWidth();
final int subtitleBottom = titleTop + mSubtitleTextView.getMeasuredHeight();
mSubtitleTextView.layout(subtitleLeft, titleTop, subtitleRight, subtitleBottom);
subtitleRight = subtitleRight - mTitleMarginEnd;
titleTop = subtitleBottom + lp.bottomMargin;
}
if (titleHasWidth) {
right = Math.min(titleRight, subtitleRight);
}
} else {
final int ld = (titleHasWidth ? mTitleMarginStart : 0) - collapsingMargins[0];
left += Math.max(0, ld);
collapsingMargins[0] = Math.max(0, -ld);
int titleLeft = left;
int subtitleLeft = left;
if (layoutTitle) {
final LayoutParams lp = (LayoutParams) mTitleTextView.getLayoutParams();
final int titleRight = titleLeft + mTitleTextView.getMeasuredWidth();
final int titleBottom = titleTop + mTitleTextView.getMeasuredHeight();
mTitleTextView.layout(titleLeft, titleTop, titleRight, titleBottom);
titleLeft = titleRight + mTitleMarginEnd;
titleTop = titleBottom + lp.bottomMargin;
}
if (layoutSubtitle) {
final LayoutParams lp = (LayoutParams) mSubtitleTextView.getLayoutParams();
titleTop += lp.topMargin;
final int subtitleRight = subtitleLeft + mSubtitleTextView.getMeasuredWidth();
final int subtitleBottom = titleTop + mSubtitleTextView.getMeasuredHeight();
mSubtitleTextView.layout(subtitleLeft, titleTop, subtitleRight, subtitleBottom);
subtitleLeft = subtitleRight + mTitleMarginEnd;
titleTop = subtitleBottom + lp.bottomMargin;
}
if (titleHasWidth) {
left = Math.max(titleLeft, subtitleLeft);
}
}
}
// Get all remaining children sorted for layout. This is all prepared
// such that absolute layout direction can be used below.
addCustomViewsWithGravity(mTempViews, Gravity.LEFT);
final int leftViewsCount = mTempViews.size();
for (int i = 0; i < leftViewsCount; i++) {
left = layoutChildLeft(mTempViews.get(i), left, collapsingMargins,
alignmentHeight);
}
addCustomViewsWithGravity(mTempViews, Gravity.RIGHT);
final int rightViewsCount = mTempViews.size();
for (int i = 0; i < rightViewsCount; i++) {
right = layoutChildRight(mTempViews.get(i), right, collapsingMargins,
alignmentHeight);
}
// Centered views try to center with respect to the whole bar, but views pinned
// to the left or right can push the mass of centered views to one side or the other.
addCustomViewsWithGravity(mTempViews, Gravity.CENTER_HORIZONTAL);
final int centerViewsWidth = getViewListMeasuredWidth(mTempViews, collapsingMargins);
final int parentCenter = paddingLeft + (width - paddingLeft - paddingRight) / 2;
final int halfCenterViewsWidth = centerViewsWidth / 2;
int centerLeft = parentCenter - halfCenterViewsWidth;
final int centerRight = centerLeft + centerViewsWidth;
if (centerLeft < left) {
centerLeft = left;
} else if (centerRight > right) {
centerLeft -= centerRight - right;
}
final int centerViewsCount = mTempViews.size();
for (int i = 0; i < centerViewsCount; i++) {
centerLeft = layoutChildLeft(mTempViews.get(i), centerLeft, collapsingMargins,
alignmentHeight);
}
mTempViews.clear();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = 0;
int height = 0;
int childState = 0;
final int[] collapsingMargins = mTempMargins;
final int marginStartIndex;
final int marginEndIndex;
if (ViewUtils.isLayoutRtl(this)) {
marginStartIndex = 1;
marginEndIndex = 0;
} else {
marginStartIndex = 0;
marginEndIndex = 1;
}
int navWidth = 0;
if (shouldLayout(mNavButtonView)) {
measureChildConstrained(mNavButtonView, widthMeasureSpec, width, heightMeasureSpec, 0,
mMaxButtonHeight);
navWidth = mNavButtonView.getMeasuredWidth() + getHorizontalMargins(mNavButtonView);
height = Math.max(height, mNavButtonView.getMeasuredHeight() +
getVerticalMargins(mNavButtonView));
childState = ViewUtils.combineMeasuredStates(childState,
ViewCompat.getMeasuredState(mNavButtonView));
}
if (shouldLayout(mCollapseButtonView)) {
measureChildConstrained(mCollapseButtonView, widthMeasureSpec, width,
heightMeasureSpec, 0, mMaxButtonHeight);
navWidth = mCollapseButtonView.getMeasuredWidth() +
getHorizontalMargins(mCollapseButtonView);
height = Math.max(height, mCollapseButtonView.getMeasuredHeight() +
getVerticalMargins(mCollapseButtonView));
childState = ViewUtils.combineMeasuredStates(childState,
ViewCompat.getMeasuredState(mCollapseButtonView));
}
final int contentInsetStart = getContentInsetStart();
width += Math.max(contentInsetStart, navWidth);
collapsingMargins[marginStartIndex] = Math.max(0, contentInsetStart - navWidth);
int menuWidth = 0;
if (shouldLayout(mMenuView)) {
measureChildConstrained(mMenuView, widthMeasureSpec, width, heightMeasureSpec, 0,
mMaxButtonHeight);
menuWidth = mMenuView.getMeasuredWidth() + getHorizontalMargins(mMenuView);
height = Math.max(height, mMenuView.getMeasuredHeight() +
getVerticalMargins(mMenuView));
childState = ViewUtils.combineMeasuredStates(childState,
ViewCompat.getMeasuredState(mMenuView));
}
final int contentInsetEnd = getContentInsetEnd();
width += Math.max(contentInsetEnd, menuWidth);
collapsingMargins[marginEndIndex] = Math.max(0, contentInsetEnd - menuWidth);
if (shouldLayout(mExpandedActionView)) {
width += measureChildCollapseMargins(mExpandedActionView, widthMeasureSpec, width,
heightMeasureSpec, 0, collapsingMargins);
height = Math.max(height, mExpandedActionView.getMeasuredHeight() +
getVerticalMargins(mExpandedActionView));
childState = ViewUtils.combineMeasuredStates(childState,
ViewCompat.getMeasuredState(mExpandedActionView));
}
if (shouldLayout(mLogoView)) {
width += measureChildCollapseMargins(mLogoView, widthMeasureSpec, width,
heightMeasureSpec, 0, collapsingMargins);
height = Math.max(height, mLogoView.getMeasuredHeight() +
getVerticalMargins(mLogoView));
childState = ViewUtils.combineMeasuredStates(childState,
ViewCompat.getMeasuredState(mLogoView));
}
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
if (lp.mViewType != LayoutParams.CUSTOM || !shouldLayout(child)) {
// We already got all system views above. Skip them and GONE views.
continue;
}
width += measureChildCollapseMargins(child, widthMeasureSpec, width,
heightMeasureSpec, 0, collapsingMargins);
height = Math.max(height, child.getMeasuredHeight() + getVerticalMargins(child));
childState = ViewUtils.combineMeasuredStates(childState,
ViewCompat.getMeasuredState(child));
}
int titleWidth = 0;
int titleHeight = 0;
final int titleVertMargins = mTitleMarginTop + mTitleMarginBottom;
final int titleHorizMargins = mTitleMarginStart + mTitleMarginEnd;
if (shouldLayout(mTitleTextView)) {
titleWidth = measureChildCollapseMargins(mTitleTextView, widthMeasureSpec,
width + titleHorizMargins, heightMeasureSpec, titleVertMargins,
collapsingMargins);
titleWidth = mTitleTextView.getMeasuredWidth() + getHorizontalMargins(mTitleTextView);
titleHeight = mTitleTextView.getMeasuredHeight() + getVerticalMargins(mTitleTextView);
childState = ViewUtils.combineMeasuredStates(childState,
ViewCompat.getMeasuredState(mTitleTextView));
}
if (shouldLayout(mSubtitleTextView)) {
titleWidth = Math.max(titleWidth, measureChildCollapseMargins(mSubtitleTextView,
widthMeasureSpec, width + titleHorizMargins,
heightMeasureSpec, titleHeight + titleVertMargins,
collapsingMargins));
titleHeight += mSubtitleTextView.getMeasuredHeight() +
getVerticalMargins(mSubtitleTextView);
childState = ViewUtils.combineMeasuredStates(childState,
ViewCompat.getMeasuredState(mSubtitleTextView));
}
width += titleWidth;
height = Math.max(height, titleHeight);
width += getPaddingLeft() + getPaddingRight();
height += getPaddingTop() + getPaddingBottom();
final int measuredWidth = ViewCompat.resolveSizeAndState(
Math.max(width, getSuggestedMinimumWidth()),
widthMeasureSpec, childState & ViewCompat.MEASURED_STATE_MASK);
final int measuredHeight = ViewCompat.resolveSizeAndState(
Math.max(height, getSuggestedMinimumHeight()),
heightMeasureSpec, childState << ViewCompat.MEASURED_HEIGHT_STATE_SHIFT);
setMeasuredDimension(measuredWidth, shouldCollapse() ? 0 : measuredHeight);
}
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