Android 嵌套片段未正确显示
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
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());