Build ionic app android

hi.
i make android app with ionic 4,when run on chrome browser its work and fine.but when run in android device Hang up on Splash Screen!??

please help me
tansks

try

  1. Adding <preference name="loadUrlTimeoutValue" value="700000" /> to config.xml file.
  2. Use this constructor in app.component.ts
import {SplashScreen} from '@ionic-native/splash-screen';
import {StatusBar} from '@ionic-native/status-bar';
import {Config, Nav, Platform} from 'ionic-angular';
// ...
constructor(
    platform: Platform,
    private statusBar: StatusBar,
    private splashScreen: SplashScreen,
  ) {
    platform.ready().then(() => {
      this.statusBar.styleDefault();
      this.splashScreen.hide();
    });
  }