Question

我正在使用子URLClassLoader加载可在运行时在Android SDK（sdk / platforms /）中找到的android.jar，然后我使用Google Reflections库检查我加载的新类。但是，似乎使用以下代码，我只能检查静态字段;我还想检查实例字段。（虽然方法没有问题！）

Path jarPath = fs.getPath("/android-sdk-macosx/platforms/android-10/android.jar");
URL[] urls = new URL[]{jarPath.toUri().toURL()};
Reflections r = new Reflections(new ConfigurationBuilder().setUrls(urls).setScanners(
    new SubTypesScanner(false)
));

URLClassLoader cl = URLClassLoader.newInstance(urls, ClassLoader.getSystemClassLoader());
for (String cls : r.getAllTypes()) {
    System.out.println(cls);
    Class<?> c = cl.loadClass(cls);
    Field[] allFields = c.getDeclaredFields();
    for (Field f : allFields) {
        System.out.println('\t' + (f.getModifiers() & Modifier.STATIC) + " " + f.getName());
    }
}

例如，当上面的代码检查android.view.View时，它只打印以下内容：

android.view.View
8 VIEW_LOG_TAG
8 NO_ID
8 VISIBLE
8 INVISIBLE
8 GONE
8 DRAWING_CACHE_QUALITY_LOW
8 DRAWING_CACHE_QUALITY_HIGH
8 DRAWING_CACHE_QUALITY_AUTO
8 SCROLLBARS_INSIDE_OVERLAY
8 SCROLLBARS_INSIDE_INSET
8 SCROLLBARS_OUTSIDE_OVERLAY
8 SCROLLBARS_OUTSIDE_INSET
8 KEEP_SCREEN_ON
8 SOUND_EFFECTS_ENABLED
8 HAPTIC_FEEDBACK_ENABLED
8 FOCUSABLES_ALL
8 FOCUSABLES_TOUCH_MODE
8 FOCUS_BACKWARD
8 FOCUS_FORWARD
8 FOCUS_LEFT
8 FOCUS_UP
8 FOCUS_RIGHT
8 FOCUS_DOWN
8 EMPTY_STATE_SET
8 ENABLED_STATE_SET
8 FOCUSED_STATE_SET
8 SELECTED_STATE_SET
8 WINDOW_FOCUSED_STATE_SET
8 ENABLED_FOCUSED_STATE_SET
8 ENABLED_SELECTED_STATE_SET
8 ENABLED_WINDOW_FOCUSED_STATE_SET
8 FOCUSED_SELECTED_STATE_SET
8 FOCUSED_WINDOW_FOCUSED_STATE_SET
8 SELECTED_WINDOW_FOCUSED_STATE_SET
8 ENABLED_FOCUSED_SELECTED_STATE_SET
8 ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET
8 ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET
8 FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
8 ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
8 PRESSED_WINDOW_FOCUSED_STATE_SET
8 PRESSED_SELECTED_STATE_SET
8 PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET
8 PRESSED_FOCUSED_STATE_SET
8 PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET
8 PRESSED_FOCUSED_SELECTED_STATE_SET
8 PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
8 PRESSED_ENABLED_STATE_SET
8 PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET
8 PRESSED_ENABLED_SELECTED_STATE_SET
8 PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET
8 PRESSED_ENABLED_FOCUSED_STATE_SET
8 PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET
8 PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET
8 PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET
8 OVER_SCROLL_ALWAYS
8 OVER_SCROLL_IF_CONTENT_SCROLLS
8 OVER_SCROLL_NEVER

But there is obviously more to it!

我做错了什么？

Answer 1

在通过反编译器抛出罐子后，原来SDK中的android.jar只是一个空壳，因此Eclipse和IntelliJ等IDE可以使用较小的jar来帮助自动完成。代码很好，但我需要检查完整的罐子。我找到了一个Github仓库，托管这些完整的罐子：https://github.com/Sable/android-platforms，如果有人有兴趣的话。

如何使用Reflection来检查加载了不同ClassLoader的类的非静态字段？

1 个答案: