我在scrollview中创建了一个流程布局。现在我无法理解的问题是,如果flowlayout的高度小于scrollview(这是match_parent),我希望我的flowlayout视图完全是match_parent,否则高度应该是wrap content。
这是我的onMeasure方法。
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthLimit = MeasureSpec.getSize(widthMeasureSpec) - getPaddingRight() - mHorizontalEndSpacingView;
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heightLimit = MeasureSpec.getSize(heightMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
boolean growHeight = widthMode != MeasureSpec.UNSPECIFIED;
int width = 0;
int currentWidth = getPaddingLeft() + mHorizontalStartSpacingView;
int currentHeight = getPaddingTop() + mVerticalStartSpacingView;
int maxChildHeight = 0;
boolean breakLine = false;
boolean newLine = false;
int spacing = 0;
final int count = getChildCount();
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
measureChild(child, MeasureSpec.makeMeasureSpec(widthLimit - getPaddingLeft() - mHorizontalStartSpacingView, MeasureSpec.AT_MOST), heightMeasureSpec);
LayoutParams lp = (LayoutParams) child.getLayoutParams();
spacing = mHorizontalCenterSpacingView;
if (lp.horizontalSpacing > 0) {
spacing = lp.horizontalSpacing;
}
if (growHeight && (breakLine || ((currentWidth + child.getMeasuredWidth()) > widthLimit))) {
newLine = true;
currentHeight += maxChildHeight + mVerticalCenterSpacingView;
width = Math.max(width, currentWidth - spacing);
currentWidth = getPaddingLeft() + mHorizontalStartSpacingView;
maxChildHeight = 0;
} else {
newLine = false;
}
maxChildHeight = Math.max(maxChildHeight, child.getMeasuredHeight());
lp.x = currentWidth;
lp.y = currentHeight;
currentWidth += child.getMeasuredWidth() + spacing;
breakLine = lp.breakLine;
}
if (newLine == false) {
width = Math.max(width, currentWidth - spacing);
}
width += getPaddingRight();
int height = currentHeight + maxChildHeight + getPaddingBottom() + mVerticalEndStartSpacingView;
setMeasuredDimension(resolveSize(width, widthMeasureSpec),
resolveSize(height, heightMeasureSpec));
}
答案 0 :(得分:2)
修正了它。以下是新的onMeasure
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthLimit = MeasureSpec.getSize(widthMeasureSpec) - getPaddingRight() - mHorizontalEndSpacingView;
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heightLimit = MeasureSpec.getSize(heightMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
boolean growHeight = widthMode != MeasureSpec.UNSPECIFIED;
int width = 0;
int currentWidth = getPaddingLeft() + mHorizontalStartSpacingView;
int currentHeight = getPaddingTop() + mVerticalStartSpacingView;
int maxChildHeight = 0;
boolean breakLine = false;
boolean newLine = false;
int spacing = 0;
final int count = getChildCount();
for (int i = 0; i < count; i++) {
View child = getChildAt(i);
measureChild(child, MeasureSpec.makeMeasureSpec(widthLimit - getPaddingLeft() - mHorizontalStartSpacingView, MeasureSpec.AT_MOST), heightMeasureSpec);
LayoutParams lp = (LayoutParams) child.getLayoutParams();
spacing = mHorizontalCenterSpacingView;
if (lp.horizontalSpacing > 0) {
spacing = lp.horizontalSpacing;
}
if (growHeight && (breakLine || ((currentWidth + child.getMeasuredWidth()) > widthLimit))) {
newLine = true;
currentHeight += maxChildHeight + mVerticalCenterSpacingView;
width = Math.max(width, currentWidth - spacing);
currentWidth = getPaddingLeft() + mHorizontalStartSpacingView;
maxChildHeight = 0;
} else {
newLine = false;
}
maxChildHeight = Math.max(maxChildHeight, child.getMeasuredHeight());
lp.x = currentWidth;
lp.y = currentHeight;
currentWidth += child.getMeasuredWidth() + spacing;
breakLine = lp.breakLine;
}
if (newLine == false) {
width = Math.max(width, currentWidth - spacing);
}
width += getPaddingRight();
int height = currentHeight + maxChildHeight + getPaddingBottom() + mVerticalEndStartSpacingView;
// The Fix.
int parentViewHeight = ((ScrollView) getParent()).getHeight();
if(parentViewHeight > height) {
height = parentViewHeight;
}
// End
int finalWidth = resolveSize(width, widthMeasureSpec);
int finalHeight = resolveSize(height, heightMeasureSpec);
setMeasuredDimension(finalWidth, finalHeight);
}