Android 嵌套片段未正确显示

Android 嵌套片段未正确显示,android,android-fragments,Android,Android Fragments,我遇到了一个问题,我有一个片段,其中包含一个选项卡布局/视图页面,处理3个子片段,当我第一次打开主片段时,子片段中的所有数据都正确显示,但当我再次打开主片段时(单击单独的listview项),数据未正确填充(即使存在) 我还注意到,子片段获取数据的唯一时间是在视图分页到最后一个选项卡时,或者在旋转屏幕时。此外,当我尝试使用查看页面向右移动屏幕时,选项卡指示器将卡在第一个和第二个选项卡之间的中间位置 如何解决此问题? 片段适配器 public class DetailFragmentPagerAd

我遇到了一个问题,我有一个片段,其中包含一个选项卡布局/视图页面,处理3个子片段,当我第一次打开主片段时,子片段中的所有数据都正确显示,但当我再次打开主片段时(单击单独的listview项),数据未正确填充(即使存在)

我还注意到,子片段获取数据的唯一时间是在视图分页到最后一个选项卡时,或者在旋转屏幕时。此外,当我尝试使用查看页面向右移动屏幕时,选项卡指示器将卡在第一个和第二个选项卡之间的中间位置

如何解决此问题?

片段适配器

public class DetailFragmentPagerAdapter extends FragmentPagerAdapter {

    Context context;
    final int PAGE_COUNT = 3;
    private String tabTitles[] = new String[] { "Plot", "Trailers", "Reviews" };
    private Movie movie;

    public DetailFragmentPagerAdapter(FragmentManager fm, Context context, Movie movie) {
        super(fm);
        this.context = context;
        this.movie = movie;
    }

    @Override
    public Fragment getItem(int position) {
        if(position == 0){
            return PlotFragment.newInstance(movie);
        } else if (position == 1){
            return TrailerFragment.newInstance();
        } else if (position == 2){
            return ReviewFragment.newInstance();
        } else {
            Log.e("RETURNING NULL", "RETURNING NULL");
            return null;
        }
    }

    @Override
    public int getCount() {
        return PAGE_COUNT;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return tabTitles[position];
    }
}
主要片段

public class MovieItemDetailFragment extends Fragment implements View.OnClickListener {
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";
    public String TAG = MovieItemDetailFragment.class.getCanonicalName();

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    private OnFragmentInteractionListener mListener;
    private View view;
    private TextView tvTitle, tvReleaseDate, tvRating;
    private ImageView ivMoviePoster;
    private Movie movie;
    private Handler handler;

    private Button btnFavorite;
    private boolean isFavorited = false;

    private View.OnClickListener mOnClickListener;

    private ViewPager viewpager;
    private TabLayout tablayout;
    private DetailFragmentPagerAdapter adapter;


    // TODO: Rename and change types and number of parameters
    public static MovieItemDetailFragment newInstance(String param1, String param2) {
        MovieItemDetailFragment fragment = new MovieItemDetailFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    public MovieItemDetailFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        view = inflater.inflate(R.layout.fragment_movie_item_detail, container, false);
        init();
        return view;
    }

    private void init() {
        handler = new Handler();
        this.movie = (Movie) getArguments().getSerializable("MOVIE");


        tvTitle = (TextView) view.findViewById(R.id.tvTitle);
        tvReleaseDate = (TextView) view.findViewById(R.id.tvReleaseDate);
        tvRating = (TextView) view.findViewById(R.id.tvAvgRating);
        ivMoviePoster = (ImageView) view.findViewById(R.id.ivMoviePoster);
        btnFavorite = (Button) view.findViewById(R.id.btnFavorite);
        btnFavorite.setOnClickListener(this);

        viewpager = (ViewPager) view.findViewById(R.id.pager);
        tablayout = (TabLayout) view.findViewById(R.id.sliding_tabs);

        adapter = new DetailFragmentPagerAdapter(getActivity().getSupportFragmentManager(),
                getActivity(), getMovie());

        viewpager.setAdapter(adapter);
        adapter.notifyDataSetChanged();

        tablayout.post(new Runnable() {
            @Override
            public void run() {
                tablayout.setupWithViewPager(viewpager);
            }
        });

        mOnClickListener = new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                isFavorited = true;
                btnFavorite.setBackground(getActivity().getResources().getDrawable(R.drawable.favorite_content_selector));
            }
        };

        setElementValues();
    }

    private void setElementValues() {
        handler.post(new Runnable() {
            @Override
            public void run() {
                tvTitle.setText(getMovie().getTitle());
                tvReleaseDate.setText(getMovie().getRelease_date());
                tvRating.setText(String.valueOf(getMovie().getVote_average()));


                Picasso.with(getActivity()).load(getMovie().getFull_poster_path()).into(ivMoviePoster);

                if (isFavorited) {
                    btnFavorite.setBackground(getActivity().getResources().getDrawable(R.drawable.favorite_content_selector));
                } else {
                    btnFavorite.setBackground(getActivity().getResources().getDrawable(R.drawable.favorite_blank_content_selector));
                }

            }
        });

    }

    // TODO: Rename method, update argument and hook method into UI event
    public void onButtonPressed(Uri uri) {
        if (mListener != null) {
            mListener.onFragmentInteraction(uri);
        }
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mListener = (OnFragmentInteractionListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btnFavorite:
                if (isFavorited) {
                    isFavorited = false;
                    btnFavorite.setBackground(getActivity().getResources().getDrawable(R.drawable.favorite_blank_content_selector));
                    showSnackbar("I thought that was one of your favorites.");
                } else {
                    isFavorited = true;
                    btnFavorite.setBackground(getActivity().getResources().getDrawable(R.drawable.favorite_content_selector));
                }
                break;
        }

    }

    private void showSnackbar(String msg) {
        Snackbar
                .make(view, msg, Snackbar.LENGTH_LONG)
                .setAction(R.string.snackbar_action, mOnClickListener)
                .setActionTextColor(getActivity().getResources().getColor(R.color.material_yellow_400))
                .show();
    }


    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p/>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        public void onFragmentInteraction(Uri uri);
    }

    public Movie getMovie() {
        return movie;
    }
}
公共类MovieItemDetailFragment扩展片段实现View.OnClickListener{
//TODO:重命名参数参数,选择匹配的名称
//片段初始化参数,例如ARG_ITEM_NUMBER
私有静态最终字符串ARG_PARAM1=“PARAM1”;
私有静态最终字符串ARG_PARAM2=“PARAM2”;
public String TAG=MovieItemDetailFragment.class.getCanonicalName();
//TODO:重命名和更改参数类型
私有字符串mParam1;
私有字符串mParam2;
私有OnFragmentInteractionListener mListener;
私人视野;
私有文本查看电视标题、电视发布日期、电视收视率;
私人影像阅览室电影海报;
私人电影;
私人经办人;
私人按钮btnFavorite;
私有布尔值isFavorited=false;
private View.OnClickListener mOnClickListener;
私人视页机视页机;
私人摊位摊位;
专用详细信息碎片页雷达适配器;
//TODO:重命名和更改参数的类型和数量
公共静态MovieItemDetailFragment newInstance(字符串param1,字符串param2){
MovieItemDetailFragment=新的MovieItemDetailFragment();
Bundle args=新Bundle();
args.putString(ARG_PARAM1,PARAM1);
args.putString(ARG_PARAM2,PARAM2);
fragment.setArguments(args);
返回片段;
}
公共电影项目详细片段(){
//必需的空公共构造函数
}
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
如果(getArguments()!=null){
mParam1=getArguments().getString(ARG_PARAM1);
mParam2=getArguments().getString(ARG_PARAM2);
}
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
//为该碎片膨胀布局
视图=充气机。充气(R.layout.fragment\u movie\u item\u detail,container,false);
init();
返回视图;
}
私有void init(){
handler=新的handler();
this.movie=(movie)getArguments().getSerializable(“movie”);
tvTitle=(TextView)view.findViewById(R.id.tvTitle);
tvReleaseDate=(TextView)view.findViewById(R.id.tvReleaseDate);
tvRating=(TextView)view.findViewById(R.id.tvAvgRating);
ivMoviePoster=(ImageView)view.findviewbyd(R.id.ivMoviePoster);
btnFavorite=(按钮)view.findViewById(R.id.btnFavorite);
btnFavorite.setOnClickListener(此);
viewpager=(viewpager)view.findViewById(R.id.pager);
tablayout=(tablayout)view.findviewbyd(R.id.sliding_选项卡);
适配器=新的DetailFragmentPagerAdapter(getActivity().getSupportFragmentManager(),
getActivity(),getMovie());
viewpager.setAdapter(适配器);
adapter.notifyDataSetChanged();
tablayout.post(新的Runnable(){
@凌驾
公开募捐{
tablayout.setupWithViewPager(viewpager);
}
});
mOnClickListener=newview.OnClickListener(){
@凌驾
公共void onClick(视图v){
isFavorited=true;
btnFavorite.setBackground(getActivity().getResources().getDrawable(R.drawable.favorite_内容选择器));
}
};
setElementValues();
}
私有void setElementValues(){
handler.post(新的Runnable(){
@凌驾
公开募捐{
tvTitle.setText(getMovie().getTitle());
tvleasedate.setText(getMovie().getRelease_date());
tvRating.setText(String.valueOf(getMovie().getVote_average());
毕加索.with(getActivity()).load(getMovie().getFull_poster_path())到(ivMoviePoster)中;
如果(我喜欢){
btnFavorite.setBackground(getActivity().getResources().getDrawable(R.drawable.favorite_内容选择器));
}否则{
btnFavorite.setBackground(getActivity().getResources().getDrawable(R.drawable.favorite_blank_content_selector));
}
}
});
}
//TODO:重命名方法、更新参数并将方法挂接到UI事件中
public void onButtonPressed(Uri){
if(mListener!=null){
onFragmentInteraction(uri);
}
}
@凌驾
公共事务主任(活动){
超级转速计(活动);
试一试{
mListener=(OnFragmentInteractionListener)活动;
}catch(ClassCastException e){
抛出新的ClassCastException(activity.toString()
+“必须实现OnFragmentInteractionListener”);
}
}
@凌驾
公共无效连接(){
super.onDetach();
mListener=null;
}
@凌驾
公共void onClick(视图v){
开关(v.getId()){
案例R.id.btnFavorite:
如果(我喜欢){
isFavorited=false;
adapter = new DetailFragmentPagerAdapter(getActivity().getSupportFragmentManager(), getActivity(), getMovie());
adapter = new DetailFragmentPagerAdapter(getChildFragmentManager(), getActivity(), getMovie());