我有RecyclerView我有一张图片，一些TextView和2 ImageButton s。
我在Activity中显示了7到8行。
在Android 4.4.4及以下版本中滚动非常流畅，但它在棒棒糖中提供了一些抽搐效果。
我认为控制RecyclerView的速度可以解决问题。
我搜索了它，却一无所获。相反，我发现如何将视图带到特定位置进行投掷。
但我想控制投掷速度。可以使用摩擦力。以及如何使用摩擦力。
menuRecyclerView = (RecyclerView) findViewById(R.id.menuList);
menuRecyclerView.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(context);
menuRecyclerView.setLayoutManager(llm);
Scroller sc = new Scroller(context);
sc.setFriction(ViewConfiguration.getScrollFriction() * 10);
这是我设置rcycler视图布局的适配器。
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import news.circle.circle.R;
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.CustomViewHolder> {
public RecyclerViewAdapter(Context context, List<MenuDescription> listOrder, DatabaseHandlerCart db
, List<MenuDescription> vegList, List<MenuDescription> nonVegList, String menuTextData) {
this.listOrder = listOrder;
this.inflater = LayoutInflater.from(context);
this.context = context;
imageLoader = new ImageLoader(context);
this.db = db;
this.vegList = vegList;
this.nonVegList = nonVegList;
this.completeList = listOrder;
this.menuTextData = menuTextData;
}
@Override
public RecyclerViewAdapter.CustomViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_ITEM) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_view, parent, false);
return new CustomViewHolder(view, viewType);
} else if (viewType == TYPE_HEADER) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.header, parent, false);
return new CustomViewHolder(view, viewType);
}
return null;
}
@Override
public void onBindViewHolder(final RecyclerViewAdapter.CustomViewHolder holder, int position) {
if (holder.Holderid == 1) {
final MenuDescription menu = listOrder.get(position - 1);
holder.title.setText(menu.getName() + "");
holder.quant.setText(menu.getQuantity() + "");
holder.description.setText(menu.getDescription());
holder.title.setTypeface(Fonts.getFont(context, Constants.AVENIR_REGULAR));
holder.description.setTypeface(Fonts.getFont(context, Constants.AVENIR_REGULAR));
Glide.with(context).load(menu.getFlag_path()).placeholder(R.drawable.ic_order_now).fitCenter().into(holder.image);
holder.inc.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (Constants.internet) {
menu.decrQuantity();
if (menu.getQuantity() == 0) {
menu.setDecr_button_visibility(0);
try {
db.DeleteCartItem(menu.getItem_id());
} catch (SQLException e) {
e.printStackTrace();
}
} else {
try {
db.updateQuantity(menu.getQuantity(), menu.getItem_id());
} catch (SQLException e) {
e.printStackTrace();
}
}
holder.quant.setText(menu.getQuantity() + "");
notifyDataSetChanged();
} else {
Toast.makeText(context, "Please check your internet connection", Toast.LENGTH_SHORT).
}
show();
}
});
holder.decr.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (Constants.internet) {
try {
if (!db.CheckIsItemAlreadyInDBorNot(menu.getItem_id(), "cart")) {
menu.incrQuantity();
db.addDataToCart(menu);
// cart_items.add(menu);
holder.quant.setText(menu.getQuantity() + "");
} else {
menu.incrQuantity();
db.updateQuantity(menu.getQuantity(), menu.getItem_id());
holder.quant.setText(menu.getQuantity() + "");
}
} catch (SQLException | IllegalStateException e) {
e.printStackTrace();
}
if (menu.getDecr_button_visibility() == 1) {
holder.decr.setVisibility(View.VISIBLE);
holder.quant.setVisibility(View.VISIBLE);
if (total == 1)
RecyclerViewMainActivity.bottomBarUp();
notifyDataSetChanged();
} else
Toast.makeText(context, "Please check your internet connection", Toast.LENGTH_SHORT).show();
}
}
});
}
}
@Override
public int getItemCount() {
return (null != listOrder ? listOrder.size() + 1 : 0);
}
@Override
public int getItemViewType(int position) {
if (isPositionHeader(position))
return TYPE_HEADER;
return TYPE_ITEM;
}
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
private boolean isPositionHeader(int position) {
return position == 0;
}
}
答案 0 :(得分：9)
有RecyclerView个专门针对control the fling speed设计的@Override
public boolean fling(int velocityX, int velocityY)
{
// if FLING_SPEED_FACTOR between [0, 1[ => slowdown
velocityY *= FLING_SPEED_FACTOR;
return super.fling(velocityX, velocityY);
}
方法，您只需覆盖它即可实现您在问题中提到的摩擦/减速效果。
您可以尝试一个简单的实现：
DROP DATABASE [C:TEST.MDF]答案 1 :(得分：5)
这很适合在投掷速度上设置最大阈值：
mRecyclerView.setOnFlingListener(new RecyclerView.OnFlingListener() {
@Override
public boolean onFling(int velocityX, int velocityY) {
if (Math.abs(velocityY) > MAX_VELOCITY_Y) {
velocityY = MAX_VELOCITY_Y * (int) Math.signum((double)velocityY);
mRecyclerView.fling(velocityX, velocityY);
return true;
}
return false;
}
});
答案 2 :(得分：1)
RecyclerView非常棒，因为它是超级模块化的。您可以将自定义滚动条设置为LayoutMananger
您可以使用https://github.com/apptik/MultiView/tree/master/scrollers
示例：
RecyclerView.SmoothScroller smoothScroller = new FlexiSmoothScroller(getContext())
.setMillisecondsPerInchSearchingTarget(100f));
smoothScroller.setTargetPosition(targetPos);
recyclerView.getLayoutManager().startSmoothScroll(smoothScroller);
答案 3 :(得分：0)
控制您的回收者视图的滚动速度 看到这个SO帖子： Snappy scrolling in RecyclerView
基本上你可以覆盖recyclerviews smoothScroll，或者实现你自己的onGestureListener并将它附加到recyclerView
答案 4 :(得分：0)
我有同样的问题。这是减缓猛攻的解决方案。
val maxFling=4000
onFlingListener = object : RecyclerView.OnFlingListener() {
override fun onFling(velocityX: Int, velocityY: Int): Boolean {
if (velocityY > maxFling) {
fling(velocityX, maxFling)
return true
} else if (velocityY < -maxFling) {
fling(velocityX, -maxFling)
return true
} else {
return false
}
}
}