问题描述
我想在我的交错gridview中实现更多加载功能.我已经尝试了一些代码行，例如使用addOnScrollListener，但是当我排在列表底部时却没有调用.
请找到我尝试实现更多功能但未获得预期结果的代码.
I want to implement the load more functionality inside my Staggered gridview. I have tried some lines of code for it like using addOnScrollListener but did not call when i come to the bottom the list.
Please find my code which i have tried to implement the load more functionality but not getting the expected result.
MY_STRAGGED_RECYCLIVIEW.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView,
int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
totalItemCount = staggeredGridLayoutManager.getItemCount();
lastVisibleItem = staggeredGridLayoutManager
.findLastCompletelyVisibleItemPositions(null)[0];
if (!loading && totalItemCount <= (lastVisibleItem + visibleThreshold)) {
// End has been reached
// Do something
System.out.println("I amm here dd ");
loading = true;
}
}
});
在我上面的代码中， System.out 没有得到打印...
In my above code, System.out is not getting print...
我为setOnScrollChangeListener的分层网格视图尝试了另一个侦听器，但它也无法正常工作
I have tried another listener for the stragged gridview that is setOnScrollChangeListener, but it is also not working
MY_STRAGGED_RECYCLIVIEW.setOnScrollChangeListener(new View.OnScrollChangeListener() {
@Override
public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
System.out.println("I amm here fffffffffff ");
}
});
此侦听器出现相同的问题，而无法打印我的 System.out
Same problem arises with this listener , not getting to print my System.out
关于我在onBindViewHolder方法中的adapter类中尝试过的其他事情，是
On more thing which i have tried in my adapter class inside the onBindViewHolder method that is
if(getCount()==position)
{
////for getting the last item of the recycleview
}
上面的代码也不起作用..请帮助我简化此问题..谢谢:)
Above code is also not working..Please help me to short out from this problem..Thanks :)
@Abbas ，请在下面检查我的适配器代码
@Abbas please check my adapter code below
public class StraggredView extends RecyclerView.Adapter<StraggredView.ViewHolder> {
private List<Content> mDataSet;
private Context ctx;
public StraggredView(Context context, List<Content> arrList) {
ctx = context;
mDataSet = arrList;
}
@Override
public StraggredView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_grid, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
if(getItemCount()==position)
{
//// I AM NOT GETTING IT AT THE BOTTOM... IT INVOKED AS THE ADAPTER IS CALLED FIRST TIME...LOOK AT IT
}
if (mDataSet.get(position).getContentImage() == null || mDataSet.get(position).getContentImage().isEmpty()) {
Glide.with(ctx).load(R.drawable.no_content)
// .override(screenWidth / 2, Utils.dpToPx(height))
.into(holder.imgContent);
} else {
Glide.with(ctx).load(mDataSet.get(position).getContentImage())
// .override(screenWidth / 2, Utils.dpToPx(height))
// .centerCrop()
//.transform(new CircleTransform())
.into(holder.imgContent);
}
holder.imgContent.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mDataSet.get(position).getContentImage() != null
|| !mDataSet.get(position).getContentImage().isEmpty()) {
FragmentActivity activity = (FragmentActivity) (ctx);
FragmentManager fm = activity.getSupportFragmentManager();
FullScreenFragment dialog = FullScreenFragment.newInstance(
mDataSet.get(position).getContentImage());
dialog.show(fm, "dialog");
}
}
});
}
@Override
public int getItemCount() {
return this.mDataSet.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
public ImageView imgContent;
public ViewHolder(View itemView) {
super(itemView);
imgContent = (ImageView) itemView.findViewById(R.id.imgContent);
}
}
}
推荐答案
实际上我使用的是NestedScrollView，它是我的Staggered recycleview的父级view.因此，addOnScrollListener侦听器和setOnScrollChangeListener无法正常工作在里面..
我在NestedScrollView中使用了setOnScrollChangeListener，它工作正常.检查我下面的解决方案:-
Actually i was using the NestedScrollView which was the parent view of my Staggered recycleview .Therefore addOnScrollListener listener and setOnScrollChangeListener was not working in it..
I have used setOnScrollChangeListener in a NestedScrollView and it worked fine. Check my below solution for it:-
NestedScrollView myNestedScroll= (NestedScrollView) findViewById(R.id.myNestedScroll);
myNestedScroll.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
@Override
public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
if (scrollY > oldScrollY) {
Log.i(TAG, "Scroll DOWN");
}
if (scrollY < oldScrollY) {
Log.i(TAG, "Scroll UP");
}
if (scrollY == 0) {
Log.i(TAG, "TOP SCROLL");
}
if (scrollY == (v.getChildAt(0).getMeasuredHeight() - v.getMeasuredHeight())) {
Log.i(TAG, "BOTTOM SCROLL");
}
}
});
这篇关于交错式Gridview(Recycleview)，在NestedScrollView内加载更多功能的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！