调用提供程序方法时，值未返回

Question

当我在主页中调用提供程序方法时，值未返回。

Home.ts

import { MediaProvider } from '../../providers/media/media';

export class HomePage {
    private val;
    constructor(private media:MediaProvider)
    {
        this.get()
    }
    get()
    {
        this.val = this.media.get();
        alert(this.val);
    }
}

media.ts

export class MediaProvider {
    public val;
    constructor()
    {}
    get()
    {
    this.val="app";
    return this.val;
    }
}