制作启动动画

第一步：新建活动  new->Activity->Empty Activity   起名splash

第二步：下载图片   粘贴到drawable文件下

第三步：添加imageview布局到activity_splash.xml文件下

 第四步：在SplashActivity写入一下代码

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.WindowManager;

public class SplashActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);  //隐藏状态栏
        getSupportActionBar().hide(); //隐藏标题栏
        setContentView(R.layout.activity_splash);

        Thread myThread = new Thread(){ //创建子线程
            @Override
            public void run() {
                try {
                    sleep(3000); //使程序休眠3秒
                    Intent it = new Intent(SplashActivity.this,MainActivity.class);  //启动MainActivity
                    startActivity(it);
                    finish(); //关闭当前活动
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        };
        myThread.start();
    }
}

第五步：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myapplication">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity"></activity>
            <activity android:name=".SplashActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>