解決方案：

修改MainActivity.dart文件

package com.example.credit_card

import android.os.Bundle

import io.flutter.app.FlutterActivity

import io.flutter.plugins.GeneratedPluginRegistrant

class MainActivity: FlutterActivity() {

? ? override fun onCreate(savedInstanceState: Bundle?) {

? ? ? ? super.onCreate(savedInstanceState)

? ? ? ? GeneratedPluginRegistrant.registerWith(this)

? ? }

}

同時(shí)修改android/app/src/main/AndroidManifest.xml

在activity標(biāo)簽內(nèi)添加

<!-- This keeps the window background of the activity showing

? ? ? ? ? ? ? ? until Flutter renders its first frame. It can be removed if

? ? ? ? ? ? ? ? there is no splash screen (such as the default splash screen

? ? ? ? ? ? ? ? defined in @style/LaunchTheme). -->

? ? ? ? ? ? <meta-data

? ? ? ? ? ? ? ? android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"

? ? ? ? ? ? ? ? android:value="true" />