我遇到了一个问题，屏幕上仅显示了Loader。我遵循以下链接：
package com.jagran.jagrantv.fragment;
import android.app.Fragment;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v17.leanback.app.BackgroundManager;
import android.support.v17.leanback.app.BrowseFragment;
import android.support.v17.leanback.widget.ArrayObjectAdapter;
import android.support.v17.leanback.widget.ListRow;
import android.support.v17.leanback.widget.ListRowPresenter;
import android.support.v17.leanback.widget.PageRow;
import android.support.v17.leanback.widget.Presenter;
import android.support.v17.leanback.widget.PresenterSelector;
import android.support.v17.leanback.widget.Row;
import android.support.v4.content.ContextCompat;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.google.gson.Gson;
import com.jagran.jagrantv.R;
import com.jagran.jagrantv.model.homejson.VideosResponse;
import com.jagran.jagrantv.network.DocsApi;
import com.jagran.jagrantv.network.NetworkCallHandler;
import com.jagran.jagrantv.network.NetworkCallInterface;
import com.jagran.jagrantv.network.RestHttpApiClient;
import com.jagran.jagrantv.presenter.IconHeaderItemPresenter;
import com.jagran.jagrantv.utils.IconHeaderItem;
import com.jagran.jagrantv.utils.Utils;
import com.jagran.jagrantv.view.CustomBrowseFragment;
public class MainFragment extends CustomBrowseFragment {
private BackgroundManager mBackgroundManager;
private ArrayObjectAdapter mRowsAdapter;
private Drawable mDefaultBackground;
private DisplayMetrics mMetrics;
private static VideosResponse keyResponse;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
prepareBackgroundManager();
setupUi();
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
loadRows();
}
@Override
public void onDestroy() {
super.onDestroy();
}
private void prepareBackgroundManager() {
mBackgroundManager = BackgroundManager.getInstance(getActivity());
mBackgroundManager.attach(getActivity().getWindow());
mDefaultBackground = ContextCompat.getDrawable(getActivity(), R.drawable.default_background);
mBackgroundManager.setDrawable(mDefaultBackground);
mMetrics = new DisplayMetrics();
getActivity().getWindowManager().getDefaultDisplay().getMetrics(mMetrics);
getMainFragmentRegistry().registerFragment(PageRow.class,
new PageRowFragmentFactory(mBackgroundManager));
}
private void setupUi() {
setHeadersState(HEADERS_ENABLED);
setHeadersTransitionOnBackEnabled(true);
setBadgeDrawable(getActivity().getResources().getDrawable(
R.mipmap.logo));
setBrandColor(ContextCompat.getColor(getActivity(), R.color.black));
setHeaderPresenterSelector(new PresenterSelector() {
@Override
public Presenter getPresenter(Object o) {
return new IconHeaderItemPresenter();
}
});
setOnSearchClickedListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(
getActivity(), "search", Toast.LENGTH_SHORT)
.show();
}
});
prepareEntranceTransition();
}
private void loadRows() {
//new SpinnerTask().execute();
mRowsAdapter = new ArrayObjectAdapter(new ListRowPresenter());
if(Utils.isNetworkConnected(getActivity()))
getVideoSubCategories();
else
Toast.makeText(getActivity(), "No network Available!",Toast.LENGTH_LONG).show();
setAdapter(mRowsAdapter);
}
private static class PageRowFragmentFactory extends BrowseFragment.FragmentFactory {
private final BackgroundManager mBackgroundManager;
PageRowFragmentFactory(BackgroundManager backgroundManager) {
this.mBackgroundManager = backgroundManager;
}
@Override
public Fragment createFragment(Object rowObj) {
Row row = (Row)rowObj;
mBackgroundManager.setDrawable(null);
if (row.getHeaderItem().getId() == 0) {
String gson = new Gson().toJson(keyResponse);
return CustomRowsFragment.newInstance(row.getHeaderItem().getId(),gson);
} else if (row.getHeaderItem().getId() == 1) {
String gson = new Gson().toJson(keyResponse);
return CustomRowsFragment.newInstance(row.getHeaderItem().getId(),gson);
} else if (row.getHeaderItem().getId() == 2) {
String gson = new Gson().toJson(keyResponse);
return CustomRowsFragment.newInstance(row.getHeaderItem().getId(),gson);
}
throw new IllegalArgumentException(String.format("Invalid row %s", rowObj));
}
}
public void getVideoSubCategories(){
/* final SpinnerFragment mSpinnerFragment = new SpinnerFragment();
try {
getFragmentManager().beginTransaction().add(R.id.main_browse_fragment, mSpinnerFragment).commit();
}catch (Exception ex){
ex.printStackTrace();
}*/
DocsApi apiService = RestHttpApiClient.getClient("https://pastebin.com/raw/").create(DocsApi.class);
retrofit2.Call<VideosResponse> call = apiService.getVideoSubCategories
("1i9J3LGF" );
//System.out.println("urlstring = " + "https://rssm-jag.jagranjosh.com/JagranApsFeeds/feed/apps/ver4.0/videos/" + "jagranJsonVideoFeedWOTBody.jsp?key=videos.common-man-issues&cp=" + cp + "&rpp=" + rpp);
NetworkCallHandler networkCallHandler = new NetworkCallHandler(getActivity(), new NetworkCallInterface() {
@Override
public void onResponse(Object response, int responseCode, Bundle data) {
if (responseCode == 1004) {
try {
keyResponse = (VideosResponse) response;
// PostAdapter listRowAdapter;
//CardPresenter cardPresenter = new CardPresenter();
PageRow pageRow[] = new PageRow[keyResponse.getVideos().getAppCategorys().size()];
for (int i = 0; i < /*keyResponse.getVideos().getAppCategorys().size()*/1; i++) {
/* listRowAdapter = new PostAdapter(getActivity(), keyResponse.docList.get(i).subKey);
listRowAdapter.setIsLoadMore(keyResponse.docList.get(i).readMore);
listRowAdapter.setItemCount(keyResponse.docList.get(i).itemCount);
listRowAdapter.setKeyType(keyResponse.docList.get(i).key_type);
addPostLoadSubscription(listRowAdapter);*/
IconHeaderItem header = new IconHeaderItem(i,keyResponse. getVideos().getAppCategorys().get(i).getLabel(),keyResponse. getVideos().getAppCategorys().get(i).getIconUrl());
pageRow[i] = new PageRow(header);
mRowsAdapter.add(pageRow[i]);
}
// getFragmentManager().beginTransaction().remove(mSpinnerFragment).commit();
}catch (Exception ex){
ex.printStackTrace();
}
}
}
@Override
public void onFailure(Object response, int responseCode, Bundle data) {
try {
//getFragmentManager().beginTransaction().remove(mSpinnerFragment).commit();
Toast.makeText(
getActivity(),
getString(R.string.error_message_loading_more_posts),
Toast.LENGTH_SHORT
).show();
}catch (Exception ex){
ex.printStackTrace();
}
}
}, 1004);
if(Utils.isNetworkConnected(getActivity()))
networkCallHandler.callToServerForData(call, null);
}
}
package com.jagran.jagrantv.fragment;
import android.app.Fragment;
import android.os.Bundle;
import android.support.v17.leanback.app.RowsFragment;
import android.support.v17.leanback.widget.ArrayObjectAdapter;
import android.support.v17.leanback.widget.HeaderItem;
import android.support.v17.leanback.widget.ListRowPresenter;
import android.support.v17.leanback.widget.OnItemViewClickedListener;
import android.support.v17.leanback.widget.Presenter;
import android.support.v17.leanback.widget.PresenterSelector;
import android.support.v17.leanback.widget.Row;
import android.support.v17.leanback.widget.RowPresenter;
import android.widget.Toast;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.jagran.jagrantv.R;
import com.jagran.jagrantv.model.homejson.AppCategory;
import com.jagran.jagrantv.model.homejson.VideosResponse;
import com.jagran.jagrantv.model.videolistresponse.VideosListResponse;
import com.jagran.jagrantv.network.DocsApi;
import com.jagran.jagrantv.network.NetworkCallHandler;
import com.jagran.jagrantv.network.NetworkCallInterface;
import com.jagran.jagrantv.network.RestHttpApiClient;
import com.jagran.jagrantv.temp.Card;
import com.jagran.jagrantv.temp.CardListRow;
import com.jagran.jagrantv.temp.CardPresenterSelector;
import com.jagran.jagrantv.temp.CardRow;
import com.jagran.jagrantv.temp.ShadowRowPresenterSelector;
import com.jagran.jagrantv.utils.Utils;
import com.jagran.jagrantv.view.CustomBrowseFragment;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
public class CustomRowsFragment extends RowsFragment {
private ArrayObjectAdapter mRowsAdapter;
int position;
VideosResponse mVideosResponse;
private static String Base_url ="";
private static String Sub_url = "";
public static Fragment newInstance(long position ,String json){
CustomRowsFragment fragment = new CustomRowsFragment();
Bundle args = new Bundle();
//args.putParcelableArrayList(ARG_LIST, dataList);
args.putLong("position", position);
args.putString("category",json);
fragment.setArguments(args);
return fragment;
}
public CustomRowsFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null)
{
Type typeMyType = new TypeToken<VideosResponse>(){}.getType();
String strGSON = getArguments().getString("category");
mVideosResponse = new Gson().fromJson(strGSON, typeMyType);
position = (int)getArguments().getLong("position");
Base_url = mVideosResponse.getVideos().getBaseUrl();
Sub_url = mVideosResponse.getVideos().getListingUrl();
}
mRowsAdapter = new ArrayObjectAdapter(new ShadowRowPresenterSelector());
setAdapter(mRowsAdapter);
setOnItemViewClickedListener(new OnItemViewClickedListener() {
@Override
public void onItemClicked(
Presenter.ViewHolder itemViewHolder,
Object item,
RowPresenter.ViewHolder rowViewHolder,
Row row) {
Toast.makeText(getActivity(), "Implement click handler", Toast.LENGTH_SHORT)
.show();
}
});
// createRows();
//getMainFragmentAdapter().getFragmentHost().notifyDataReady(getMainFragmentAdapter());
}
private void createRows() {
String json = Utils.inputStreamToString(getResources().openRawResource(
R.raw.page_row_example));
CardRow[] rows = new Gson().fromJson(json, CardRow[].class);
for (CardRow row : rows) {
if (row.getType() == CardRow.TYPE_DEFAULT) {
mRowsAdapter.add(createCardRow(row));
}
}
}
private Row createCardRow(CardRow cardRow) {
PresenterSelector presenterSelector = new CardPresenterSelector(getActivity());
ArrayObjectAdapter adapter = new ArrayObjectAdapter(presenterSelector);
for (Card card : cardRow.getCards()) {
adapter.add(card);
}
HeaderItem headerItem = new HeaderItem(cardRow.getTitle());
return new CardListRow(headerItem, adapter, cardRow);
}
/*
private void addPostLoadSubscription(AppCategory category) {
final int cp = 1;
final int rpp = 10;
// String url = "http://rssm-jag.jagranjosh.com/JagranApsFeeds/feed/apps/ver4.0/videos/jagranJsonVideoFeedWOTBody.jsp?" + tag + "&cp=" +
// cp + "&rpp=" + rpp;
for (int i = 0; i < category.getSub().size(); i++) {
if (category != null && !category.getSub().get(i).getKeyType().equalsIgnoreCase("feed")){
// url = tag;
DocsApi apiService = RestHttpApiClient.getClient(Base_url).create(DocsApi.class);
retrofit2.Call<VideosListResponse> call = apiService.getVideosList(Sub_url+category.getSub().get(i).getSubKey()+"cp=1&rpp=10");
}else{
DocsApi apiService = RestHttpApiClient.getClient(category.getSub().get(i).getSubKey()).create(DocsApi.class);
retrofit2.Call<VideosListResponse> call = apiService.getVideosList("");
}
NetworkCallHandler networkCallHandler = new NetworkCallHandler(getActivity(), new NetworkCallInterface() {
@Override
public void onResponse(Object response, int responseCode, Bundle data) {
if (responseCode == 1004) {
VideosListResponse keyResponse = (VideosListResponse) response;
*/
/* adapter.removeLoadingIndicator();
if (adapter.size() == 0 && keyResponse.responseData.docList.isEmpty()) {
adapter.showReloadCard();
} else {
int noOfItem = 10;
try {
noOfItem = Integer.parseInt(itemCount);
} catch (Exception ex) {
noOfItem = keyResponse.responseData.docList.size();
}
if (noOfItem > keyResponse.responseData.docList.size())
noOfItem = keyResponse.responseData.docList.size();
List subCategory = keyResponse.responseData.docList.subList(0, noOfItem);
adapter.addAllItems(subCategory);
adapter.setNextPage(cp + 1);
if (isLoadmore != null) {
if (isLoadmore.equalsIgnoreCase("1"))
adapter.showLoadMoreCard();
}*//*
//addPostLoadSubscription( adapter);
// }
}
}
@Override
public void onFailure(Object response, int responseCode, Bundle data) {
try {
*/
/* adapter.removeLoadingIndicator();
if (adapter.size() == 0) {
adapter.showTryAgainCard();
} else {
Toast.makeText(
getActivity(),
getString(R.string.error_message_loading_more_posts),
Toast.LENGTH_SHORT
).show();
}*//*
} catch (Exception ex) {
ex.printStackTrace();
}
}
}, 1004);
networkCallHandler.callToServerForData(call, null);
}
}
*/
}
任何帮助将不胜感激。谢谢。