有时，我们需要不修改现有代码的情况下，让TabActivity支持Fragment。但是，TabActivity并不继承自FragmentActivity。 所以我们需要拷贝TabActivity以及ActivityGroup的代码到项目中，并让ActivityGroup继承自FragmentActivity。 此时会出现一个问题，无法重写dispatchActivityResult这个函数了，因为该函数的访问性为包内可见。没有关系，我们可以去掉@Override，运行时，依然可以调用到这个dispatchActivityResult里面来。但是也要做简单的修改，如下。
void dispatchActivityResult(String who, int requestCode, int resultCode,
Intent data) {
if (who != null) {
Activity act = mLocalActivityManager.getActivity(who);
if (act != null) {
// act.onActivityResult(requestCode, resultCode, data);
callActivityResult(act, requestCode, resultCode, data, false);
return;
}
}
// super.dispatchActivityResult(who, requestCode, resultCode, data);
callActivityResult(this, requestCode, resultCode, data, true);
}
void callActivityResult(Activity act, int requestCode, int resultCode, Intent data, boolean superClass) {
Class c ;
if (superClass) {
c = act.getClass().getSuperclass();
} else {
c = act.getClass();
}
try {
Method mOAR = c.getDeclaredMethod("onActivityResult", int.class, int.class, Intent.class);
mOAR.setAccessible(true);
mOAR.invoke(act, requestCode, resultCode, data);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}