关于Callback返回的数据

Question

public class BookActivity extends AppCompatActivity {     private BookBiz bookBiz=new BookBiz();     private List<BookList.DataBean> mData=new ArrayList<>();     private BookListAdapter adapter;     private ListView mlistView;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_book);         mlistView=findViewById(R.id.book_lv);         initView();              }     private void initView() {         bookBiz.listView(new BookCallback<List<BookList.DataBean>>() {             @Override             public void onError(Exception ex) {             }             @Override             public void onSuccess(List<BookList.DataBean> response) {                 if (response.size()==0){                     Log.e("List","返回结果是空");                     return;                 }                 mData.addAll(response);                 Log.e("main1","数据"+mData.size());                             }         });         Log.e("main2","数据"+mData.size());             adapter=new BookListAdapter(this,mData);         mlistView.setAdapter(adapter);     }     protected static void start(Context context){         Intent intent=new Intent(context,BookActivity.class);         context.startActivity(intent);     } }我在后台的log显示的main1 有数据可是在main2里显示没有数据。在Callback返回有数据  可是就是拿不到

Answer 1

bookBiz.listView(new BookCallback<List<BookList.DataBean>>() {
            @Override
            public void onError(Exception ex) {

            }

            @Override
            public void onSuccess(List<BookList.DataBean> response) {
                if (response.size()==0){
                    Log.e("List","返回结果是空");
                    return;
                }
                mData.addAll(response);
                //这里需要更新一下adapter中的数据
                Log.e("main1","数据"+mData.size());
               
            }
        });