1

在这里，我有两个具有parentRecyclerViewAdapter和childRecyclerViewAdapter的 recyclerview 。父适配器具有LinearLayoutManager.VERTICAL布局管理器，而 Clild 适配器具有带有 itemDecoration 的GridLayoutManager(mContext, 2)布局管理器。

第一次滚动时，RecyclerView 滚动很慢，一旦查看数据，滚动就很流畅。在应用程序实例未完全删除之前，滚动将是平滑的，当应用程序重新启动时，滚动会再次滞后。

请帮我解决这个BUG！！

ParentRecyclerViewAdapter

public class RecyclerViewDataAdapter extends RecyclerView.Adapter<RecyclerViewDataAdapter.ItemRowHolder> {

    private ArrayList<SectionDataModel> dataList;
    private Context mContext;
    private RecyclerListItemClick onListClick;

    public RecyclerViewDataAdapter(Context context, ArrayList<SectionDataModel> dataList) {
        this.dataList = dataList;
        this.mContext = context;
        onListClick = (RecyclerListItemClick) context;

    }

    @Override
    public ItemRowHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        return new ItemRowHolder(LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.single_row_template_section, null));

    }

    @Override
    public void onBindViewHolder(ItemRowHolder itemRowHolder, int i) {

        ArrayList<SingleTemplateModel> templateModelArrayList = dataList.get(i).getTemplateModelArrayList();
        String sectionName = dataList.get(i).getHeaderTitle();

        itemRowHolder.itemTitle.setText(sectionName);
        TemplateChooserAdapter itemListDataAdapter = new TemplateChooserAdapter(mContext, templateModelArrayList , dataList.get(i).getHeaderTitle());

        itemRowHolder.recycler_view_list.setAdapter(itemListDataAdapter);

    }

    @Override
    public int getItemCount() {
        return (null != dataList ? dataList.size() : 0);
    }

    public class ItemRowHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

        private TextView itemTitle;
        private RecyclerView recycler_view_list;

        private ItemRowHolder(View view) {
            super(view);

            this.itemTitle = view.findViewById(R.id.itemTitle);
            this.recycler_view_list = view.findViewById(R.id.recycler_view_list);
            this.recycler_view_list.setOnClickListener(this);
            this.recycler_view_list.setHasFixedSize(true);
            this.recycler_view_list.setLayoutManager(new GridLayoutManager(mContext, 2));
            this.recycler_view_list.addItemDecoration(new SpacesItemDecoration(2 , 25 , false));

        }

        @Override
        public void onClick(View v) {

        onListClick.onRecyclerItemClicked(dataList.get(getAdapterPosition()).getHeaderTitle());

        }
    }

}

ChildRecyclerAdapter

public class TemplateChooserAdapter extends RecyclerView.Adapter<TemplateChooserAdapter.ViewHolder> {

    private static final String TAG = TemplateChooserAdapter.class.getSimpleName();
    private Context context;
    private ArrayList<SingleTemplateModel> templateModelArrayList;
    private OnTemplatesListClicked onListClick;

    public TemplateChooserAdapter(Context context, ArrayList<SingleTemplateModel> templateModelArrayList, String sectionName) {
        this.context = context;
        this.templateModelArrayList = templateModelArrayList;
        onListClick = (OnTemplatesListClicked) context;
        AppUtils.showLog(TAG, "CorporateUserAdapter");

    }

    @Override
    public TemplateChooserAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new ViewHolder(
                LayoutInflater.from(parent.getContext()).inflate(R.layout.single_row_template_chooser, parent, false)
        );
    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, int position) {

        holder.templateView.setImageResource(templateModelArrayList.get(position).getImage());

    }

    @Override
    public int getItemCount() {
        return templateModelArrayList.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

        ImageView templateView;

        public ViewHolder(View itemView) {
            super(itemView);
            templateView = itemView.findViewById(R.id.template_view);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {

            templateModelArrayList.get(getAdapterPosition()).setShowIndicator(true);
            onListClick.onTemplateClick(templateModelArrayList.get(getAdapterPosition())); // TODO send model when item clicked

        }
    }
}

活动.java

private void recyclerViewJob() {

    recyclerView.setHasFixedSize(true);
    recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
    RecyclerViewDataAdapter adapter = new RecyclerViewDataAdapter(this, allSampleData);
    recyclerView.setAdapter(adapter);

}

SectionDataModel.java

public class SectionDataModel {


    private String headerTitle;
    private ArrayList<SingleTemplateModel> templateModelArrayList;


    public SectionDataModel() {

    }

    public SectionDataModel(String headerTitle, ArrayList<SingleTemplateModel> templateModelArrayList) {
        this.headerTitle = headerTitle;
        this.templateModelArrayList = templateModelArrayList;
    }


    public String getHeaderTitle() {
        return headerTitle;
    }

    public void setHeaderTitle(String headerTitle) {
        this.headerTitle = headerTitle;
    }

    public ArrayList<SingleTemplateModel> getTemplateModelArrayList() {
        return templateModelArrayList;
    }

    public void setTemplateModelArrayList(ArrayList<SingleTemplateModel> templateModelArrayList) {
        this.templateModelArrayList = templateModelArrayList;
    }

}

SingleTemplateModel.java

public class SingleTemplateModel {

    private String title;
    private String skuName;
    private int image;
    private boolean showIndicator;

    public SingleTemplateModel(String title, String skuName, int image, boolean showIndicator) {
        this.title = title;
        this.skuName = skuName;
        this.image = image;
        this.showIndicator = showIndicator;
    }

    public String getSkuName() {
        return skuName;
    }

    public void setSkuName(String skuName) {
        this.skuName = skuName;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public int getImage() {
        return image;
    }

    public void setImage(int image) {
        this.image = image;
    }

    public boolean isShowIndicator() {
        return showIndicator;
    }

    public void setShowIndicator(boolean showIndicator) {
        this.showIndicator = showIndicator;
    }
}

single_row_template_section.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:paddingTop="30dp"
    android:clickable="true"
    android:focusable="true">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">


        <TextView
            android:id="@+id/itemTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_centerVertical="true"
            android:layout_gravity="center_vertical"
            android:text="Sample title"
            android:textColor="@color/white"
            android:textSize="20sp"
            android:textStyle="bold"
            android:paddingLeft="5dp"
            android:paddingBottom="10dp"/>


    </RelativeLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler_view_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:orientation="horizontal" />


</LinearLayout>

single_row_template_chooser.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="280dp"
    card_view:cardElevation="6dp">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ImageView
            android:id="@+id/template_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scaleType="fitXY"
            android:src="@mipmap/model_9" />

    </RelativeLayout>

</android.support.v7.widget.CardView>
4

1 回答 1

0

我认为您可以尝试从资源中延迟加载图像。有像Picasso或Glide这样的图书馆可以帮助你。

所以它可能看起来像这样：

毕加索：

import com.squareup.picasso.Picasso;
...

public class TemplateChooserAdapter extends RecyclerView.Adapter<TemplateChooserAdapter.ViewHolder> {
...

    @Override
   public void onBindViewHolder(final ViewHolder holder, int position) {
      Picasso.with(holder.itemView.getContext()).load(templateModelArrayList.get(position).getImage()).into(holder.templateView);
   }
...

}
于 2018-01-17T16:32:49.323 回答