反射得到全局Context

最新推荐文章于 2024-03-14 10:44:07 发布

原创最新推荐文章于 2024-03-14 10:44:07 发布 · 761 阅读

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该博客介绍了一种通过反射技术获取Android全局Application Context的方法，包括查找ActivityThread类，调用currentActivityThread方法，访问mInitialApplication字段并设置为可访问，最后从中获取Application实例。

public static Context getContext() {
Application application = null;
try {
Class<?> activityThreadClass = Class.forName("android.app.ActivityThread");
Object activityThread;
activityThread = activityThreadClass.getMethod("currentActivityThread").invoke(null);

Field activitiesField = activityThreadClass.getDeclaredField("mInitialApplication");
activitiesField.setAccessible(true);
application = (Application)activitiesField.get(activityThread);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return application;
}