Ionic framework Ionic 4:bgImage未显示在StreamingAudioOptions上

我试图创建一个应用程序使用离子4，基本上只是流音频源从远程服务器。虽然我在StreamAudioOptions中使用了bgImage，但一切都正常，但我还是得到了一个黑屏。我的bg图像位于src/assets/bg.png中

我尝试了以下对图像的引用：

/assets/bg.png
assets/bg.png
./assets/bg.png
../../assets/bg.png

这是我的密码：

import { StreamingMedia, StreamingAudioOptions } from '@ionic-native/streaming-media/ngx/';

playAudio() {
    this.platform.ready().then(() => {
      if (this.platform.is("cordova")) 
      {
        let options : StreamingAudioOptions = {
          bgImage: "/assets/bg.png",
          bgColor: "#fff",
          bgImageScale: "stretch",
          successCallback: () => 
          {
            console.log("Successfully played audio");
          },
          errorCallback: (e) => 
          {
            console.log(e);
          }
        };
        this.streaming.playAudio(this.mp3.url, options);
      } 
      else 
      {
        console.log("Must be on a mobile device to play!");
      }
  });
}

---

感谢您的帮助。谢谢

我把ref改成了“www/assets/bg.png”

import { StreamingMedia, StreamingAudioOptions } from '@ionic-native/streaming-media/ngx/';

playAudio() {
    this.platform.ready().then(() => {
      if (this.platform.is("cordova")) 
      {
        let options : StreamingAudioOptions = {
          bgImage: "www/assets/bg.png",
          bgImageScale: "stretch",
          successCallback: () => 
          {
            console.log("Successfully played audio");
          },
          errorCallback: (e) => 
          {
            console.log(e);
          }
        };
        this.streaming.playAudio(this.mp3.url, options);
      } 
      else 
      {
        console.log("Must be on a mobile device to play!");
      }
  });
}