Android 启动动画太生硬

跟

android:launchMode="singleTask"属性无关系

请禁用路由

ARouter.getInstance()
.build(Routes.Main.MAIN)
.withTransition(R.anim.activity_anim_in, R.anim.activity_anim_out).navigation()

正确做法是

val intent = Intent(
    this@SplashActivity,
    MainActivity::class.java
)
startActivity(intent)
overridePendingTransition(R.anim.activity_anim_in, R.anim.activity_anim_out)

R.anim.activity_anim_in

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha
    android:fromAlpha="1.0"
    android:toAlpha="1.0"
    android:duration="0" /></set>