屏幕旋转适配器notifyDataSetChanged不起作用

Question

I have a problem with updating RecyclerView when rotating the screen. By clicking on fab button I'm showing dialog fragment with input fields. Then when I'm rotating the screen and saving data my RecyclerView is not updating. I'm setting adapter in onCreate method. I should rotate once more in order to see fresh data. How can solve this issue.

Thanks in advance.

dataSource = new MyBusinessDataSource(this);

        try
        {
            dataSource.openForRead();
        }
        catch (SQLException sqlEx)
        {
            Toast.makeText(MyBusinessMainActivity.this, R.string.sqlite_exception, Toast.LENGTH_SHORT).show();
            return;
        }

        categories = dataSource.getAllCategories();

        adapter = new CategoriesAdapter(this, categories);
        rv_list_cats.setAdapter(adapter);
        dataSource.close();

Answer 1

You need to override your onConfigurationChanged method in your activity or fragment and update your data there. Like.

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    if(adapter!=null)
    {
        categories = dataSource.getAllCategories();
        adapter.notifyDataSetChanged();
    }
}

Also if you are not using the ScreenConfig property in your manifest use that looks like this.

   android:configChanges="orientation|screenSize"