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Question

问题是当 recyclerview 第一次滚动时它滞后于新的 rv 项目出现在视线中的时刻，因为方法 onCreateViewHolder() 会膨胀新的项目布局。任何加快流程或预膨胀布局的解决方案？因为当创建了足够多的布局来回收项目时它开始平滑滚动。

public class PersonInReviewRvAdapter extends RecyclerView.Adapter<PersonInReviewRvAdapter.PersonHolder> {

private Context context;
private OnItemClickListener itemClickedInterface;
private OnItemLongClickListener itemLongClickedInterface;


public List<SoundingBoardPersonModel> daterList = new ArrayList<>();

public PersonInReviewRvAdapter(Context context, List<SoundingBoardPersonModel> daterList) {
    this.context = context;
    this.daterList = daterList;
}

@Override
public PersonInReviewRvAdapter.PersonHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View layoutView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.item_review_match_sb, parent, false);
    return new PersonInReviewRvAdapter.PersonHolder(layoutView);
}


@Override
public void onBindViewHolder(PersonInReviewRvAdapter.PersonHolder holder, int position) {

}

public void setItemClickListener(OnItemClickListener itemClickedInterface) {
    this.itemClickedInterface = itemClickedInterface;
}

public void setLongItemClickListener(OnItemLongClickListener itemLongClickedInterface) {
    this.itemLongClickedInterface = itemLongClickedInterface;
}

public void addContact(String name, String location) {
    SoundingBoardPersonModel soundingBoardPersonModel = new SoundingBoardPersonModel();
    soundingBoardPersonModel.name = name;
    soundingBoardPersonModel.location = location;
    daterList.add(soundingBoardPersonModel);
    notifyDataSetChanged();
}

public void removeContact(int position) {
    daterList.remove(position);
    notifyDataSetChanged();
}


@Override
public int getItemCount() {
    return 10;
}

static class PersonHolder extends RecyclerView.ViewHolder {

    @BindView(R.id.item_container)
    RelativeLayout itemContainer;

    @BindView(R.id.person_subscriber_name)
    TextViewNexaBold nameTxt;

    @BindView(R.id.person_subscriber_location)
    TextViewNexaLight personLocation;

    public PersonHolder(View itemView) {
        super(itemView);
        ButterKnife.bind(this, itemView);
    }
}}

项目布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/item_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/selector_gray_bottom_top_stroke">


<RelativeLayout
    android:id="@+id/subscriber_container"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginRight="@dimen/size_24dp"
    android:layout_marginTop="@dimen/size_24dp"
    android:layout_toLeftOf="@+id/center_container">

    <de.hdodenhof.circleimageview.CircleImageView
        android:id="@+id/person_subscribre_icon"
        android:layout_width="@dimen/size_80dp"
        android:layout_height="@dimen/size_80dp"
        android:layout_centerHorizontal="true" />


    <com.qazaqfound.thesetup.custom_views.TextViewNexaBold
        android:id="@+id/person_subscriber_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/person_subscribre_icon"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="@dimen/size_16dp"
        android:ellipsize="marquee"
        android:maxLines="1"
        android:maxWidth="@dimen/size_120dp"
        android:text="Melisa"
        android:textColor="@color/dark_grey_main"
        android:textSize="@dimen/text_size_16sp" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/person_subscriber_name"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="@dimen/size_8dp"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="@dimen/size_16dp"
            android:layout_height="@dimen/size_16dp"
            android:layout_gravity="center_vertical"
            android:src="@drawable/ic_location" />


        <com.qazaqfound.thesetup.custom_views.TextViewNexaLight
            android:id="@+id/person_subscriber_location"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="@dimen/size_2dp"
            android:layout_marginTop="@dimen/size_1dp"
            android:ellipsize="marquee"
            android:maxLines="1"
            android:text="USA, New York" />

    </LinearLayout>
</RelativeLayout>

<RelativeLayout
    android:id="@+id/target_match_container"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="@dimen/size_24dp"
    android:layout_marginTop="@dimen/size_24dp"
    android:layout_toRightOf="@+id/center_container">

    <de.hdodenhof.circleimageview.CircleImageView
        android:id="@+id/person_match_icon"
        android:layout_width="@dimen/size_80dp"
        android:layout_height="@dimen/size_80dp"
        android:layout_centerHorizontal="true" />


    <com.qazaqfound.thesetup.custom_views.TextViewNexaBold
        android:id="@+id/person_target_match_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/person_match_icon"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="@dimen/size_16dp"
        android:ellipsize="marquee"
        android:maxLines="1"
        android:maxWidth="@dimen/size_120dp"
        android:text="Melisa"
        android:textColor="@color/dark_grey_main"
        android:textSize="@dimen/text_size_16sp" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/person_target_match_name"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="@dimen/size_8dp"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="@dimen/size_16dp"
            android:layout_height="@dimen/size_16dp"
            android:layout_gravity="center_vertical"
            android:src="@drawable/ic_location" />


        <com.qazaqfound.thesetup.custom_views.TextViewNexaLight
            android:id="@+id/ic_location_match"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="@dimen/size_2dp"
            android:layout_marginTop="@dimen/size_1dp"
            android:ellipsize="marquee"
            android:maxLines="1"
            android:text="USA, New York" />

    </LinearLayout>
</RelativeLayout>


<LinearLayout
    android:id="@+id/center_container"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="@dimen/size_36dp"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/ic"
        android:layout_width="@dimen/size_40dp"
        android:layout_height="@dimen/size_40dp"
        android:layout_gravity="center_horizontal"
        android:src="@drawable/ic_match_arrow" />

    <com.qazaqfound.thesetup.custom_views.TextViewNexaBold
        android:id="@+id/time_remaining_txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="@dimen/size_8dp"
        android:text="20 minutes"
        android:textColor="@color/dark_pink" />

    <com.qazaqfound.thesetup.custom_views.TextViewNexaBold
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="@dimen/size_8dp"
        android:text="@string/text_remaining" />
</LinearLayout>


<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/subscriber_container"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="@dimen/size_16dp">

    <ImageView
        android:id="@+id/like_btn"
        android:layout_width="@dimen/size_70dp"
        android:layout_height="@dimen/size_70dp"
        android:src="@drawable/ic_like" />


    <ImageView
        android:id="@+id/dislike_btn"
        android:layout_width="@dimen/size_70dp"
        android:layout_height="@dimen/size_70dp"
        android:layout_toRightOf="@+id/like_btn"
        android:src="@drawable/ic_dislike" />

</RelativeLayout>

Answer 1

我注意到您使用了 <com.qazaqfound.thesetup.custom_views.TextViewNexaBold> 自定义视图。我使用相同的方法创建带有自定义字体的 TextView。如果是这样，请避免从资产文件夹中重新获取字体。

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Recycler view laggy behaviour

android

lag

android-recyclerview