从片段中调用Activity的onCreate或onResume方法

Question

Scenario :

I have an activity that populates data from sqlite database in a gridview. I am calling a fragment from this activity by onItemClick of Gridview :

FragmentA a = new FragmentA();
android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
android.support.v4.app.FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.Main, a, "a").addToBackStack("a");
ft.commit();

And in that fragment, some changes are made in the contents of the cell of the gridview that was selected.

Then, as I have added it to backstack, pressing back button will remove the fragment, and in onPauseMethod, the changes are made in the database.

 @Override
public void onPause() {
    super.onPause();
    tasksDatabaseOperations.updatenote(id, updated_title, updated_note, updated_date, updated_color, protectredBoolean);
}

Now, to make the changes in the gridview of the main activity, adapter.notifyDataSetChanged has to be called which I have called in its onCreate method.

But, as it is a fragment, removing it neither call Activities onCreate nor its onResume method.

Any workaround for this situation?

Answer 1

更好的方法是，您应该使用所使用的片段中的活动接口编写回调方法，以便当该片段被分离时，该方法将被回调并根据需要进行工作。

Answer 2

您有很多选择，其中之一是使用广播接收器将数据更新从片段发送到主活动。...另一种方式是，您希望将信号从片段更新发送到活动，是在其中创建一个公共静态方法。可以从片段中调用的活动