Android Easy Image Browser

I have nothing to do. I spent half an hour using some of the content released in the past few days to make a simple picture browser applet for Android. The code sets main_activity.xml to design the first interface, design three buttons and assign ids, and then call each of them in MainActivity. The id of btn implements the set method, and the interface corresponding to the intent jump can be implemented in each method! The code is as follows: (I will not write the code of Main2-3-4Activity. When I create its MainActivity.java file, its xml pair will come out directly, and my MainActivity.java has not written content)

main_activity.xml

<?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"
    tools:context=".MainActivity"
    android:orientation="vertical"
    android:background="@drawable/bj"

    >

    <TextView

        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_marginTop="60dp"
        android:textSize="50dp"
        android:textColor="#FF9800"
        android:text="CSDN图片大全" />
<Button
    android:id="@+id/btn1"
    android:layout_marginTop="40dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="动漫"
    android:textSize="45sp"
    android:textColor="@color/colorAccent"

    />
    <Button
        android:id="@+id/btn2"
        android:layout_marginTop="40dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="游戏"
        android:textSize="45sp"
        android:textColor="@color/colorAccent"

        />
    <Button
        android:id="@+id/btn3"
        android:layout_marginTop="40dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="美女"
        android:textSize="45sp"
        android:textColor="@color/colorAccent"

        />

</LinearLayout>

 activity_main2.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="match_parent"
    android:background="#7A3F51B5"
    android:orientation="vertical">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">


            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="欢迎来到动漫世界"
                android:gravity="center"
                android:textSize="40sp"
                />
            <ImageView
                android:background="@drawable/dm"
                android:layout_width="match_parent"
                android:layout_height="350dp"
                />
            <ImageView
                android:background="@drawable/dm1"
                android:layout_width="match_parent"
                android:layout_height="350dp"
                />
            <ImageView
                android:background="@drawable/dm2"
                android:layout_width="match_parent"
                android:layout_height="350dp"
                />
            <ImageView
                android:background="@drawable/dm3"
                android:layout_width="match_parent"
                android:layout_height="350dp"
                />
            <ImageView
                android:background="@drawable/dm4"
                android:layout_width="match_parent"
                android:layout_height="350dp"
                />
            <ImageView
                android:background="@drawable/dm5"
                android:layout_width="match_parent"
                android:layout_height="350dp"
                />
            <ImageView
                android:background="@drawable/dm6"
                android:layout_width="match_parent"
                android:layout_height="350dp"
                />
            <TextView
                android:gravity="center"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="40sp"
                android:text="滑到最后一页了哦"
                />
        </LinearLayout>
    </ScrollView>
</LinearLayout>

 activity_main3.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="match_parent"
    android:background="#FF226F"
    android:orientation="vertical">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">


            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="欢迎来到游戏世界"
                android:gravity="center"
                android:textSize="40sp"
                />
            <ImageView
                android:background="@drawable/youxi"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <ImageView
                android:background="@drawable/youxi2"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <ImageView
                android:background="@drawable/youxi3"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <ImageView
                android:background="@drawable/youxi4"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <ImageView
                android:background="@drawable/youxi1"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <ImageView
                android:background="@drawable/youxi5"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <ImageView
                android:background="@drawable/youxi6"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <ImageView
                android:background="@drawable/youxi7"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <ImageView
                android:background="@drawable/youxi8"
                android:layout_width="match_parent"
                android:layout_height="250dp"
                />
            <TextView
                android:gravity="center"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="40sp"
                android:text="滑到最后一页了哦"
                />
        </LinearLayout>
    </ScrollView>
</LinearLayout>

 activity_main4.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="match_parent"

    android:orientation="vertical">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">


            <TextView
                android:background="#9A86AF4C"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="欢迎来到美女世界"

                android:gravity="center"
                android:textSize="40sp"
                />
            <ImageView

                android:background="@drawable/mn1"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn2"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn3"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn4"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn5"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn6"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn7"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn8"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn9"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />
            <ImageView
                android:background="@drawable/mn10"
                android:layout_width="match_parent"
                android:layout_height="550dp"
                />


            <TextView
                android:gravity="center"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="40sp"
                android:text="滑到最后一页了哦"
                />
        </LinearLayout>
    </ScrollView>
</LinearLayout>

MainActivity,java

package com.example.allphones;


import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
private Button btn1,btn2,btn3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btn1=findViewById(R.id.btn1);
        btn2=findViewById(R.id.btn2);
        btn3=findViewById(R.id.btn3);
                btn1.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Intent intent=new Intent(MainActivity.this,Main2Activity.class);
                        startActivity(intent);
            }
        });
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent=new Intent(MainActivity.this,Main3Activity.class);
                startActivity(intent);
            }
        });
        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent=new Intent(MainActivity.this,Main4Activity.class);
                startActivity(intent);

            }
        });
    }
}