我使用SuperSLiM
来自Github
的库,
我需要在 nested 中使用这个库RecyclerView
,但是当我将 this RecyclerView
which stick's it's header 放在顶部时,在 another 中RecyclerView
,它似乎错过了它的属性。这是我的 root 适配器RecyclerView
,在我的每一行中都有 aRecyclerView
和 a TextView
。
public class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder> {
private Context mContext;
private LayoutInflater mLayoutInflater;
public Adapter(Context context) {
this.mContext = context;
this.mLayoutInflater = LayoutInflater.from(context);
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View view = mLayoutInflater.inflate(R.layout.row, viewGroup, false);
ViewHolder viewHolder = new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
//
RecyclerView mRecyclerView = viewHolder.mRecyclerView;
TextView mTextView = viewHolder.mTextView;
//
mTextView.setText("pos: " + position);
//set LayoutManager
mRecyclerView.setLayoutManager(new NestedLinearLayoutManager(mContext));
//set Adapter
CountryNamesAdapter adapter = new CountryNamesAdapter(mContext, 18);
adapter.setMarginsFixed(true);
adapter.setHeaderDisplay(18);
mRecyclerView.setAdapter(adapter);
}
@Override
public int getItemCount() {
return 10;
}
class ViewHolder extends RecyclerView.ViewHolder {
TextView mTextView;
RecyclerView mRecyclerView;
public ViewHolder(View itemView) {
super(itemView);
mTextView = (TextView) itemView.findViewById(R.id.title);
mRecyclerView = (RecyclerView) itemView.findViewById(R.id.list);
}
}
这是NestedLinearLayoutManager
展示孩子RecyclerView
友善的课程。
public class NestedLinearLayoutManager extends LinearLayoutManager {
public NestedLinearLayoutManager(Context context){
super(context);
}
public NestedLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
super(context, orientation, reverseLayout);
}
private int[] mMeasuredDimension = new int[2];
@Override
public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state,
int widthSpec, int heightSpec) {
final int widthMode = View.MeasureSpec.getMode(widthSpec);
final int heightMode = View.MeasureSpec.getMode(heightSpec);
final int widthSize = View.MeasureSpec.getSize(widthSpec);
final int heightSize = View.MeasureSpec.getSize(heightSpec);
int width = 0;
int height = 0;
for (int i = 0; i < getItemCount(); i++) {
measureScrapChild(recycler, i,
View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED),
mMeasuredDimension);
if (getOrientation() == HORIZONTAL) {
width = width + mMeasuredDimension[0];
if (i == 0) {
height = mMeasuredDimension[1];
}
} else {
height = height + mMeasuredDimension[1];
if (i == 0) {
width = mMeasuredDimension[0];
}
}
}
switch (widthMode) {
case View.MeasureSpec.EXACTLY:
width = widthSize;
case View.MeasureSpec.AT_MOST:
case View.MeasureSpec.UNSPECIFIED:
}
switch (heightMode) {
case View.MeasureSpec.EXACTLY:
height = heightSize;
case View.MeasureSpec.AT_MOST:
case View.MeasureSpec.UNSPECIFIED:
}
setMeasuredDimension(width, height);
}
private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
int heightSpec, int[] measuredDimension) {
View view = recycler.getViewForPosition(position);
if (view != null) {
RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams();
int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec,
getPaddingLeft() + getPaddingRight(), p.width);
int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec,
getPaddingTop() + getPaddingBottom(), p.height);
view.measure(childWidthSpec, childHeightSpec);
measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin;
measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin;
recycler.recycleView(view);
}
}
}
这个库也可以嵌套工作RecyclerView
吗?