检测每个触摸事件而不获取应用程序上下文？

我们可以通过在上下文中使用getWindow()获取每个Activity的Touch事件:

//set Window.Callback for getting touch event 
        final Window window = context.getWindow();
        final Window.Callback localCallback = window.getCallback();
        window.setCallback(new MyWindowCallback(localCallback));

如何在不使用上下文的情况下实现它？

有没有办法删除这个回调(因为窗口类没有任何删除回调方法？

有一种方法可以获取Application上下文而不传递它.我在生产环境中使用过这段代码,这很好用.

private static Application getApplicationContext() throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException {
    Context context;
    final Class activityThreadClass =
            Class.forName("android.app.ActivityThread");
    final Method method = activityThreadClass.getMethod("currentApplication");
    context = (Application) method.invoke(null, (Object[]) null);
    Log.d(tag_, "Context is " + context);
    application = (Application)context;
    return application;
}