我在一个Activity中有4个CardView，每个CardView都有一个RecyclerView。每个RecyclerView有大约8-10行/项。滚动此页面/活动非常缓慢。 我怀疑我的RecyclerView.Adapter类有些问题。 有人可以告诉我代码中可能出现的问题吗？
import android.support.v7.widget.RecyclerView;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
public class JyotishAppAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<DataModel> dataList;
private int cardView;
public static final int CARD_2_COL = 0;
public static final int CARD_3_COL_HEAD = 1;
public static final int CARD_2_COL2 = 2;
public static class GenericViewHolder extends RecyclerView.ViewHolder {
TextView itemName;
TextView itemDescription;
public GenericViewHolder (View itemView) {
super (itemView);
this.itemName = (TextView) itemView.findViewById(R.id.item_name);
this.itemDescription = (TextView) itemView.findViewById(R.id.item_description);
}
}
public static class GenericViewHolder2 extends RecyclerView.ViewHolder {
TextView itemName;
TextView itemDescription;
TextView itemStatus;
public GenericViewHolder2 (View itemView) {
super (itemView);
this.itemName = (TextView) itemView.findViewById(R.id.item_name);
this.itemDescription = (TextView) itemView.findViewById(R.id.item_description);
this.itemStatus = (TextView) itemView.findViewById(R.id.item_status);
}
}
public JyotishAppAdapter(ArrayList<DataModel> dataList, int cardView) {
this.dataList = dataList;
this.cardView = cardView;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View v;
if (cardView == CARD_2_COL) {
v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.list_item, viewGroup, false);
return new GenericViewHolder(v);
} else if (cardView == CARD_2_COL2) {
v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.list_item3, viewGroup, false);
return new GenericViewHolder(v);
} else {
v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.list_item2, viewGroup, false);
return new GenericViewHolder2(v);
}
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, final int position) {
final DataModel dataModel = dataList.get(position);
if (viewHolder instanceof GenericViewHolder) {
GenericViewHolder holder = (GenericViewHolder) viewHolder;
holder.itemName.setText(Html.fromHtml(dataModel.getValue1()));
holder.itemDescription.setText(Html.fromHtml(dataModel.getValue2()));
if (dataModel.getValue4() != null) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Utility.showAlertMessage(view.getContext(), R.string.message_title,
Html.fromHtml(dataModel.getValue4()).toString());
}
});
}
} else {
GenericViewHolder2 holder = (GenericViewHolder2) viewHolder;
holder.itemName.setText(Html.fromHtml(dataModel.getValue1()));
holder.itemDescription.setText(Html.fromHtml(dataModel.getValue2()));
holder.itemStatus.setText(Html.fromHtml(dataModel.getValue3()));
if (dataModel.getValue4() != null) {
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Utility.showAlertMessage(view.getContext(), R.string.message_title,
Html.fromHtml(dataModel.getValue4()).toString());
}
});
}
}
}
@Override
public int getItemCount() {
return dataList.size();
}
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/PageContentBackground"
tools:context=".PanchangaActivity">
<include android:id="@+id/tool_bar"
layout="@layout/tool_bar" />
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/tool_bar"
android:orientation="vertical"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
android:background="@color/PageContentBackground">
<TextView android:id="@+id/muhurta_zone"
style="@style/TextStyle"
android:textSize="@dimen/text_size_horo_data"
android:ellipsize="none"
android:scrollHorizontally="false"
android:layout_marginBottom="5dp"/>
<TextView android:id="@+id/muhurta_place"
style="@style/TextStyle"
android:textSize="@dimen/text_size_horo_data"
android:ellipsize="none"
android:scrollHorizontally="false"
android:layout_marginBottom="10dp"/>
<ScrollView android:layout_height="wrap_content"
android:layout_width="match_parent">
<RelativeLayout android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:id="@+id/cardview4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
card_view:cardElevation="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true"
card_view:cardBackgroundColor="@color/CardViewColor">
<android.support.v7.widget.RecyclerView
android:id="@+id/panchanga_result_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/CardViewColor"
android:paddingLeft="3dp"
android:paddingRight="3dp" />
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:id="@+id/cardview5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/cardview4"
android:layout_marginTop="10dp"
card_view:cardElevation="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true"
card_view:cardBackgroundColor="@color/CardViewColor">
<android.support.v7.widget.RecyclerView
android:id="@+id/panchanga_result_2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/CardViewColor"
android:paddingLeft="3dp"
android:paddingRight="3dp" />
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:id="@+id/cardview6"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/cardview5"
android:layout_marginTop="10dp"
card_view:cardElevation="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true"
card_view:cardBackgroundColor="@color/CardViewColor">
<android.support.v7.widget.RecyclerView
android:id="@+id/panchanga_result_3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/CardViewColor"
android:paddingLeft="3dp"
android:paddingRight="3dp" />
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:id="@+id/cardview7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/cardview6"
android:layout_marginTop="10dp"
card_view:cardElevation="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardUseCompatPadding="true"
card_view:cardBackgroundColor="@color/CardViewColor">
<android.support.v7.widget.RecyclerView
android:id="@+id/panchanga_result_4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/CardViewColor"
android:paddingLeft="3dp"
android:paddingRight="3dp" />
</android.support.v7.widget.CardView>
</RelativeLayout>
</ScrollView>
</LinearLayout>
</RelativeLayout>
答案 0 :(得分：2)
通过将setNestedScrollingEnabled设置为false可以解决该问题。 的 recyclerView1.setNestedScrollingEnabled（假）;
最好使用NestedScrollView并将setNestedScrollingEnabled设置为false以获得更好的性能。