应用程序在加载xml布局文件的主线程中做了大量工作 [英] Application doing too much work in main thread loading the xml layout file

问题描述

我正在制作一个9x9的Sudoku网格，其中81个单元中的每个单元本身都是一个3x3的网格. 一个单元格看起来像这样:

I am making a 9x9 Sudoku grid where each of the 81 cells is itself a 3x3 grid. A single cell looks something like this:

1 2 3

4 5 6

7 8 9

每个数字代表该单元格的铅笔注释.我有一个名为cell_layout.xml的文件，表示此3x3排列.

Each number represents pencil annotations for that cell. I have a file called cell_layout.xml representing this 3x3 arrangement.

我已经能够生成网格，并且代码有效:

I am already able to generate the grid, and the code works:

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.solver_principal);

        TableLayout sudokuGrid = (TableLayout) findViewById(R.id.sudokuGrid);
        sudokuGrid.setShrinkAllColumns(true);
        sudokuGrid.setStretchAllColumns(true);

        TableRow.LayoutParams paramsRow = new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT, TableRow.LayoutParams.WRAP_CONTENT);
        TableLayout.LayoutParams paramsLayout = new TableLayout.LayoutParams(TableLayout.LayoutParams.WRAP_CONTENT, TableLayout.LayoutParams.WRAP_CONTENT);

        for(int i = 0; i < 9; ++i)
        {
            TableRow tableRow = new TableRow(SolverActivity.this);
            tableRow.setDividerDrawable(getResources().getDrawable(R.drawable.column_divider));
            tableRow.setShowDividers(LinearLayout.SHOW_DIVIDER_MIDDLE);
            for(int j = 0; j < 9; ++j)
            {
                View cell = getLayoutInflater().inflate(R.layout.cell_layout, sudokuGrid, false);
                cell.setLayoutParams(paramsRow);
                tableRow.addView(cell);
            }

            tableRow.setLayoutParams(paramsLayout);
            sudokuGrid.addView(tableRow);
        }

    }

上面的代码仅将所需布局放大81倍到TableLayout中.

The code above just inflates 81 times the wanted layout into the TableLayout.

它可以工作，那么您的问题是什么?

该活动创建时间过长.即使我仅用网格的一行进行测试，该方法仍需要花费很长时间才能膨胀多次所需的布局.

The activity takes too long to create. Even if I test with just one row of the grid, it takes too long for the method to inflate many times the wanted layout.

我得到:

后台并发复制GC释放了131244(9MB)个AllocSpace对象，0(0B)个LOS对象，24％的空闲空间，74MB/98MB，已暂停127us，总计444.411ms

Background concurrent copying GC freed 131244(9MB) AllocSpace objects, 0(0B) LOS objects, 24% free, 74MB/98MB, paused 127us total 444.411ms

跳过了153帧！该应用程序可能在其主线程上做过多的工作.

Skipped 153 frames! The application may be doing too much work on its main thread.

有人可以针对我的情况提出更好的方法吗?生成81x 3x3网格的工作量真的太多了吗?

Can anyone suggest a better approach for my situation? Is really too much work generating 81 times a 3x3 grid?

谢谢

修改

因此，我现在尝试手动记下xml文件.我认为不必多次膨胀xml就能改善情况，但事实并非如此. 仅通过加载xml文件，我仍然遇到相同的问题主线程中的工作过多".

So I now tried to manually write down the xml file. I thought that not having to inflate many times the xml would improve things, but it didn´t. I still have the same problem "Too much work in the main thread" just by loading the xml file.

<TableLayout
        android:id="@+id/sudokuGrid"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="16dp"
        android:divider="@drawable/row_divider"
        android:showDividers="middle"
        android:shrinkColumns="*"
        android:stretchColumns="*"
        app:layout_constraintDimensionRatio="1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/solverTitle">

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:divider="@drawable/column_divider"
            android:showDividers="middle">
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
            <include
                layout="@layout/cell_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                />
        </TableRow>

    </TableLayout>

如果有人想尝试一下，这是我的单元格布局.

And here is my cell layout, in case someone wants to give it a try.

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/cellValue"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/pencilOne"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="1"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toTopOf="@+id/pencilFour"
        app:layout_constraintEnd_toStartOf="@+id/pencilTwo"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/pencilTwo"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="2"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toTopOf="@+id/pencilFive"
        app:layout_constraintEnd_toStartOf="@+id/pencilThree"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/pencilOne"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/pencilThree"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="3"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toTopOf="@+id/pencilSix"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/pencilTwo"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/pencilFour"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="4"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toTopOf="@+id/pencilSeven"
        app:layout_constraintEnd_toStartOf="@+id/pencilFive"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/pencilOne" />

    <TextView
        android:id="@+id/pencilSix"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="6"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toTopOf="@+id/pencilNine"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/pencilFive"
        app:layout_constraintTop_toBottomOf="@+id/pencilThree" />

    <TextView
        android:id="@+id/pencilSeven"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="7"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/pencilEight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/pencilFour" />

    <TextView
        android:id="@+id/pencilEight"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="8"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/pencilNine"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/pencilSeven"
        app:layout_constraintTop_toBottomOf="@+id/pencilFive" />

    <TextView
        android:id="@+id/pencilNine"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="9"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/pencilEight"
        app:layout_constraintTop_toBottomOf="@+id/pencilSix" />

    <TextView
        android:id="@+id/pencilFive"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintDimensionRatio="1:1"
        android:text="5"
        android:textSize="10sp"
        android:gravity="center"
        android:visibility="invisible"
        app:layout_constraintBottom_toTopOf="@+id/pencilEight"
        app:layout_constraintEnd_toStartOf="@+id/pencilSix"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/pencilFour"
        app:layout_constraintTop_toBottomOf="@+id/pencilTwo" />
</android.support.constraint.ConstraintLayout>

推荐答案

有关Application doing too much work in main thread的更多信息，请参阅此帖子

For more information about Application doing too much work in main thread Please refer this post

https://stackoverflow.com/a/21126690/7666442

首先在Build.Gradle文件中的dependencies下添加以使用RecyclerView

First add below dependencies in your Build.Gradle file to use RecyclerView

implementation 'com.google.android.material:material:1.0.0-beta01'

注意:如果已经添加了com.google.android.material:material的dependencies

Note : no need to add extra dependencies of RecyclerView if you have already added dependencies of com.google.android.material:material

现在在您的活动文件布局中添加RecyclerView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".JavaActivity">

    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:id="@+id/myRecyclerView"
        android:layout_height="wrap_content" />

</LinearLayout>

现在，您需要使用GridLayoutManager将列表项显示为网格

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

public class JavaActivity extends AppCompatActivity {

    RecyclerView myRecyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_java);

        myRecyclerView = findViewById(R.id.myRecyclerView);

        GridLayoutManager gridLayoutManager = new GridLayoutManager(JavaActivity.this, 3);
        myRecyclerView.setLayoutManager(gridLayoutManager);
        myRecyclerView.setAdapter(new MyAdapter(this));
    }

}

像这样创建MyAdapter类

import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {

    private Context context;

    public MyAdapter(Context context) {
        this.context = context;
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.row_list_item, parent, false);
        return new MyViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        holder.tvText.setText(String.valueOf(position + 1));
        if (position % 2 == 0) {
            holder.imgBanner.setBackgroundColor(Color.RED);
        } else {
            holder.imgBanner.setBackgroundColor(Color.GREEN);
        }
    }

    @Override
    public int getItemCount() {
        return 81;
    }

    public class MyViewHolder extends RecyclerView.ViewHolder {
        ImageView imgBanner;
        TextView tvText;

        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            imgBanner = itemView.findViewById(R.id.imgBanner);
            tvText = itemView.findViewById(R.id.tvText);
        }
    }
}

row_list_item布局

row_list_item layout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_margin="10dp"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/imgBanner"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:contentDescription="@string/app_name"
        android:src="@drawable/ic_launcher_background" />

    <TextView
        android:id="@+id/tvText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:textColor="@android:color/white"
        android:textSize="15sp"
        android:textStyle="bold" />
</RelativeLayout>

输出

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