Android，如何庆祝我的 simplexml 类？

Question

抱歉，我对 Android 还很陌生...... 我有一个活动创建我的类的对象实例：

file MyActivity.java:

import org.simpleframework.xml.Serializer;
import org.simpleframework.xml.core.Persister;

public class MyActivity extends Activity {
    Artworks myArtworks;

    ...
    myArtworks = serial.read(Artworks.class, artworksXmlFile);
    ...
}
--------------------------------------------------------------

file Artworks.java:

import org.simpleframework.xml.Element;
import org.simpleframework.xml.ElementList;

@Element
public class Artworks {
    @ElementList(entry = "artwork", inline = true)
    private List<Artwork> list;
    ...
}
--------------------------------------------------------------

file Artwork.java:
public class Artwork {
    // how to use here Toast.makeText(..., text, Toast.LENGTH_SHORT).show() ???
}
--------------------------------------------------------------

How do I use the Toast class (or any UI class) in my class Artwork,我从不直接实例化它，但它是通过调用serial.read(间接创建的)艺术品.类）？ 我到底该怎么做呢？

提前致谢！

Answer 1

您可以使用“静态”帮​​助器类来维护对 Activity 上下文的静态引用。因此，在反序列化 Artwork 类之前，请调用 UtilClass.setContext(getApplicationContext());。然后，在 Artwork 类中，您可以检索该上下文，然后执行诸如 Toast.makeText(UtilClass.getContext(), "text", Toast.LENGTH_LONG).show(); 之类的操作。

Answer 2

import android.widget.Toast;

public class Artwork {
   Toast.makeText(Artwork.this, "text", Toast.LENGTH_LONG).show();
}