/**
* Created by Solang on 2017/7/21.
*/
public class AutoLineFeedLayoutManager extends RecyclerView.LayoutManager {
@Override
public RecyclerView.LayoutParams generateDefaultLayoutParams() {
return new RecyclerView.LayoutParams(
RecyclerView.LayoutParams.WRAP_CONTENT,
RecyclerView.LayoutParams.WRAP_CONTENT);
}
@Override
public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
detachAndScrapAttachedViews(recycler);
int sumWidth = getWidth();
int curLineWidth = 0, curLineTop = 0;
int lastLineMaxHeight = 0;
for (int i = 0; i < getItemCount(); i++) {
View view = recycler.getViewForPosition(i);
addView(view);
measureChildWithMargins(view, 0, 0);
int width = getDecoratedMeasuredWidth(view);
int height = getDecoratedMeasuredHeight(view);
curLineWidth += width;
if (curLineWidth <= sumWidth) {//不需要换行
layoutDecorated(view, curLineWidth - width, curLineTop, curLineWidth, curLineTop + height);
//比较当前行多有item的最大高度
lastLineMaxHeight = Math.max(lastLineMaxHeight, height);
} else {//换行
curLineWidth = width;
if (lastLineMaxHeight == 0) {
lastLineMaxHeight = height;
}
//记录当前行top
curLineTop += lastLineMaxHeight;
layoutDecorated(view, 0, curLineTop, width, curLineTop + height);
lastLineMaxHeight = height;
}
}
}
}
RecyclerView 自动换行layoutManager
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