反射获取 application对象

Class<?> ActivityThreadclz;
ApplicationInfo info = null;
try {
ActivityThreadclz = Class.forName("android.app.ActivityThread");
Method currentActivityThreadm = ActivityThreadclz.getMethod("currentActivityThread", null);
Object currentActivity = currentActivityThreadm.invoke(null, null);
Method getApplication = ActivityThreadclz.getMethod("getApplication", null);
Application app = (Application) getApplication.invoke(currentActivity, null);
info = app.getApplicationInfo();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}