android - 在 ASyncTask 中设置 op ViewPager

Question

我试图在 ASyncTask 中获取一些数据，一旦它完成，就将该数据传递给 viewpager 中的任何 fragment 。但是我得到以下异常:

java.lang.IllegalStateException: ViewPager 尚未绑定(bind)。

我必须遵循以下代码:

OnCreateView
@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        setContentView(R.layout.simple_tabs);       
        team_id = this.getIntent().getIntExtra("index", 0) + 1;
        new getTeam().execute();
    }

异步任务:

    @Override
    protected Void doInBackground(Void... arg0) {
        team = api.getTeamByID(team_id);
        return null;       
    }

@Override  
        protected void onPostExecute(Void result) {
            mAdapter = new TeamFragmentAdapter(getSupportFragmentManager());

            mPager = (ViewPager)findViewById(R.id.pager);
            mPager.setAdapter(mAdapter);

            mIndicator = (TabPageIndicator)findViewById(R.id.indicator);
            mIndicator.setViewPager(mPager);

            progressDialog.dismiss();
        }

团队 fragment 适配器:

class TeamFragmentAdapter extends FragmentPagerAdapter implements TitleProvider {

        ArrayList<Fragment> fragments = new ArrayList<Fragment>();
        ArrayList<String> titels = new ArrayList<String>();

        public TeamFragmentAdapter(FragmentManager fm) {
            super(fm);
            fragments.add(new TeamInformatieFragment(team));
            titels.add("Informatie");               
            fragments.add(new ContactFragment());
            titels.add("Informatie");
        }



        @Override
        public Fragment getItem(int position) {
            return fragments.get(position);
        }

        @Override
        public int getCount() {
            return fragments.size();
        }

        @Override
        public String getTitle(int position) {
            return titels.get(position);
        }
    }

当我将“OnPostExecute(Void result)”的内容移动到 OnCreateView 时，它起作用了……但我必须在创建 fragment 之前获取所有数据。

你能告诉我哪里出了问题吗？ :(

Answer 1

已修复!我不得不将所有布局内容从 ASyncTask 移动到 OnPostExecute。它看起来像这样:

@Override  
        protected void onPostExecute(Void result) {
            setContentView(R.layout.simple_tabs);

            mAdapter = new TeamFragmentAdapter(getSupportFragmentManager());

            mPager = (ViewPager)findViewById(R.id.pager);
            mPager.setAdapter(mAdapter);

            mIndicator = (TabPageIndicator)findViewById(R.id.indicator);
            mIndicator.setViewPager(mPager);
            invalidateOptionsMenu();
            progressDialog.dismiss();
        }