Android - 我无法刷新/重绘ListView

Question

我有一个列出一组书籍的ListView.
用户可以添加新书,然后使用onActivityResult方法再次显示书籍集.

在添加一本新书之后,我已经花了好几个小时来完成这套书的刷新,但根本没有运气.

这是我尝试过的代码:

public class BookActivity extends Activity {

    private ArrayList<Book> books = null;   
    private BookItemAdapter bookItemAdapter;
    ListView booksSetView = null;    

    @Override
    public void onCreate(Bundle savedInstanceState) {   
        books = new ArrayList<Book>();        
        booksSetView = (ListView)findViewById(R.id.booksSet);   

        Cursor booksCursor = null;

        booksCursor = getBooksCursor();                      
        if (booksCursor.moveToFirst())
        {
            do
            {   
                books.add(getBookFromCursor(booksCursor));                  
            } while(booksCursor.moveToNext());
        }

        bookItemAdapter = new BookItemAdapter(this, R.layout.book_item, books, 0); // BookItemAdapter is a ArrayAdapter        
        booksSetView.setAdapter(bookItemAdapter);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);
            Log.e("BOOKS MANAGER", "trying to refresh");

        bookItemAdapter.notifyDataSetChanged();
        booksSetView.invalidate();
        booksSetView.invalidateViews();     
    }
}

请帮忙.
非常感谢!

Answer 1

这对我有用

Adapter adapter = list.getAdapter();
list.setAdapter(null);
list.setAdapter(adapter);

它迫使notifyDataSetChanged被解雇,它就像一个魅力!