来自android中的应用程序上下文的GetAssets

Question

是否可以使用像以下应用程序实例的getAssets：

public class MyApp extends Application
{
    static private MyApp    sInstance = null;

    public static MyApp Instance()
    {
        if( sInstance == null )
        {
            sInstance = new MyApp();
        }

        return sInstance;
    }
}

和功能使用：

*** AssetManager as = MyApp.Instance().getAssets();
Fonts.ARIAL     = Typeface.createFromAsset(as, "Arial.ttf" );

清单： app_name是“MyApp”

getAssets函数调用返回NullPointerException（ * 行）

我该如何解决？

很好地找到了答案： MyApp应该是这样的：

public class MyApplication extends Application {
    private static MyApplication singleton;

    public MyApplication getInstance(){
        return singleton;
    }
    @Override
    public void onCreate() {
        super.onCreate();
        singleton = this;
    }
}

请看看里面： http://intridea.com/2011/5/24/how-to-use-application-object-of-android?blog=company