所以更具体我有含有tablayout一个活动的每个选项卡应基本上加载包含一个再循环器视图的独立片段的i想要的使用改型的API检索到的数据中的用户动作的recyclerView碱基被加载
所以这是该活动：应用崩溃试图到JSON使用改型加载到recyclerView在一个片段中一个tablayout时
public class RestaurantLogoView extends AppCompatActivity implements LiteFragment.OnFragmentInteractionListener, RegularFragment.OnFragmentInteractionListener, View.OnClickListener {
private static final String TAG = "RestaurantLogoView";
public static ProgressDialog progressDialog;
//TODO
public static View.OnClickListener myOnClickListener;
private String chosenArea;
TextView locationTv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ViewPager mViewPager = (ViewPager) findViewById(R.id.container);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
SectionsPagerAdapter pagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(),getApplicationContext());
//remove this if you still didnt get data in the fragment
mViewPager.setAdapter(pagerAdapter);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(view -> Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show());
locationTv = (TextView) findViewById(R.id.location_tv);
chosenArea = (String) getIntent().getSerializableExtra("Object");
locationTv.setText(chosenArea);
locationTv.setOnClickListener(this);
}
@Override
public void onFragmentInteraction(Uri uri) {
//TODO i added this lately not sure what its supposed to do but consider removing it
}
/**
* Called when a view has been clicked.
*
* @param v The view that was clicked.
*/
//
//
// @Override
// public boolean onCreateOptionsMenu(Menu menu) {
// getMenuInflater().inflate(R.menu.menu_restaurant_main_view, menu);
// return true;
// }
@Override
public void onClick(View v) {
if (v == locationTv) {
Intent o = new Intent(getApplicationContext(), AreaList.class);
startActivity(o);
finish();
} else {
Toast.makeText(getApplicationContext(), "What do you want to eat today?", Toast.LENGTH_LONG).show();
}
}
private class SectionsPagerAdapter extends FragmentStatePagerAdapter {
String tabTitles[] = {getString(R.string.regular), getString(R.string.lite)};
Context context;
SectionsPagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
new RegularFragment();
return RegularFragment.newInstance(TAG, position);
case 1:
new LiteFragment();
return LiteFragment.newInstance(TAG, position);
default:
return null;
}
}
@Override
public int getCount() {
return tabTitles.length;
}
@Override
public CharSequence getPageTitle(int position) {
// Generate title based on item position
return tabTitles[position];
}
}
}
`
这是应该在我的第一标签中所示的第一片段
public class RegularFragment extends Fragment {
OnFragmentInteractionListener mListener;
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
public static final String REGULAR_PARAM1 = "lite";
View RootView;
List<RestaurantModel> regularRestaurants;
private RecyclerView recyclerView;
RecyclerViewAdapter adapter;
private Call<RestaurantElKbeer> callbackCall;
private String TAG = "RegularFragment";
//new
public static final String ARG_PAGE = "ARG_PAGE";
private int mPage;
public RegularFragment() {
}
// TODO: Rename and change types and number of parameters
public static Fragment newInstance(String param, int position) {
//TODO it might be important i didnt know why i created it
Fragment fragment = new RegularFragment();
Bundle args = new Bundle();
args.putInt(param, position);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
regularRestaurants = requestRegularList();
mPage = getArguments().getInt(ARG_PAGE);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//new
RootView = inflater.inflate(R.layout.fragment_regular, container, false);
recyclerView = (RecyclerView) RootView.findViewById(R.id.recyclerView);
recyclerView.setHasFixedSize(true);
initializeAdapter();
LinearLayoutManager llm = new LinearLayoutManager(this.getContext());
recyclerView.setLayoutManager(llm);
return RootView;
}
private void initializeAdapter() {
adapter = new RecyclerViewAdapter(getActivity(), regularRestaurants);
recyclerView.setAdapter(adapter);
}
// 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 onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
private List<RestaurantModel> requestRegularList() {
List<RestaurantModel> myRestaurantsList = new ArrayList<>();
RestAdapter restAdapter = new RestAdapter();
API api = restAdapter.getApi();
// URL: https://betaweb.jeebley.com/services_new/services.php?action=search&langId=1&countryId=21&cuisineType=1&cuisineId=all&areaId=1&delvType=1
Call<RestaurantElKbeer> call = api.getRestaurants("search", "1", "21", "all", "1", "1");
call.enqueue(new Callback<RestaurantElKbeer>() {
@Override
public void onResponse(@NonNull Call<RestaurantElKbeer> call, @NonNull Response<RestaurantElKbeer> response) {
if (response.isSuccessful()) {
ArrayList<String> names = new ArrayList<String>();
RestaurantElKbeer restaurantResponse = response.body();
List<RestaurantModel> list = restaurantResponse.getRestaurantModel();
if(list != null && !list.isEmpty()){
for (int i = 0; i < list.size(); i++) {
String name;
name = list.get(i).getRName();
names.add(name);
Log.i(TAG, "onResponse: " + names.get(i));
}
}
else
{
Log.i(TAG, "onResponse(regular): RestaurantModelList is null");
}
RecyclerViewAdapter adapter = new RecyclerViewAdapter(getContext(), list);
recyclerView.setAdapter(adapter);
recyclerView.setOnClickListener(v -> {
Intent i = new Intent(getContext(), ChooseYourLanguage.class);
i.putExtra("Object", getId());
startActivityForResult(i, 0);
});
}
}
@Override
public void onFailure(@NonNull Call<RestaurantElKbeer> call, Throwable t) {
Log.i(TAG, "onFailure: failed RegularFragmentCall");
}
});
return myRestaurantsList;
}
interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
/**
* Initialize the contents of the Fragment host's standard options menu. You
* should place your menu items in to <var>menu</var>. For this method
* to be called, you must have first called {@link #setHasOptionsMenu}. See
* {@link RestaurantLogoView#onCreateOptionsMenu(Menu) Activity.onCreateOptionsMenu}
* for more information.
*
* @param menu The options menu in which you place your items.
* @param inflater
* @see #setHasOptionsMenu
* @see #onPrepareOptionsMenu
* @see #onOptionsItemSelected
*/
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public void setHasOptionsMenu(boolean hasMenu) {
super.setHasOptionsMenu(hasMenu);
}
}
这是我RecyclerViewAdapter
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
private List<RestaurantModel> items;
private Context ctx;
public RecyclerViewAdapter(Context context, List<RestaurantModel> items) {
this.ctx = context;
this.items=items;
}
private OnItemClickListener mOnItemClickListener;
private SharedPref sharedPref;
public interface OnItemClickListener {
void onItemClick(View view, RestaurantModel obj, int position);
}
public void setOnItemClickListener(final OnItemClickListener mItemClickListener) {
this.mOnItemClickListener = mItemClickListener;
}
public static class ViewHolder extends RecyclerView.ViewHolder {
CardView cv;
TextView title;
TextView description;
ImageView imageView;
ViewHolder(View itemView) {
super(itemView);
cv = (CardView) itemView.findViewById(R.id.restaurant_card_view);
title = (TextView) itemView.findViewById(R.id.restaurantName_section_label);
description = (TextView) itemView.findViewById(R.id.section_label2);
imageView = (ImageView) itemView.findViewById(R.id.restaurantImageView);
}
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.restaurant_card_layout, parent, false);
return new ViewHolder(v);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position, List<Object> payloads) {
super.onBindViewHolder(holder, position, payloads);
RestaurantModel p = (RestaurantModel) payloads.get(position);
holder.title.setText(p.getRName());
if (!p.getDelvType().equals("1")) {
holder.description.setText(p.getJDeliveryTime() + " " + p.getRMinOrderAmt() + " " + p.getJDeliveryCharge());
} else {
holder.description.setText(p.getRDeliveryTime() + " " + p.getRMinOrderAmt() + " " + p.getRDeliveryCharge());
holder.imageView.setImageResource(R.mipmap.ic_launcher);
}
holder.cv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.i("RecyclerViewAdapter", "onClick: replace with intent to send Restaurant data");
}
});
}
@Override
public void onBindViewHolder(ViewHolder holder,int position) {
final RestaurantModel p = items.get(position);
holder.title.setText(p.getRName());
if (!p.getDelvType().equals("1")) {
holder.description.setText(p.getJDeliveryTime() + " " + p.getRMinOrderAmt() + " " + p.getJDeliveryCharge());
} else {
holder.description.setText(p.getRDeliveryTime() + " " + p.getRMinOrderAmt() + " " + p.getRDeliveryCharge());
}
holder.cv.setOnClickListener(view -> {
mOnItemClickListener.onItemClick(view, p, position);
});
}
@Override
public int getItemCount() {
return items.size();
}
public interface OnLoadMoreListener {
void onLoadMore(int current_page);
}
}
这是我得到
**
06-06 00例外：11：05.215 10571-10571/com.jeebley。 jeebley E/AndroidRuntime：致命异常：主 工艺：com.jeebley.jeebley，PID：10571 显示java.lang.NullPointerException：尝试调用接口方法 '诠释java.util.List.size（）' 上的空对象引用 com.jeebley.jeebley.adapters.RecyclerViewAdapter.getItemCount（RecyclerViewAdapter.java:109） at android.support.v7.widget.RecyclerView.dispatchLayoutStep1（RecyclerView.java:3493） at android.support.v7.widget.RecyclerView .dispatchLayout（RecyclerView.java:3310） at android.support.v7.widget.RecyclerView.onLayout（RecyclerView.java:3844） at android.view.View.layout（View.java:17687） at android.view .ViewGroup.layout（ViewGroup.java:5631） at android.widget.RelativeLayout.onLayout（RelativeLayout.java:1079） at android.view.View.layout（View.java:17687） at android.view.ViewGroup .layout（六ewGroup.java:5631） at android.support.v4.view.ViewPager.onLayout（ViewPager.java:1795） at android.view.View.layout（View.java:17687） at android.view.ViewGroup。 layout（ViewGroup.java:5631） at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild（HeaderScrollingViewBehavior.java:131） at android.support.design.widget.ViewOffsetBehavior.onLayoutChild（ViewOffsetBehavior.java:42） at android.support.design.widget.CoordinatorLayout.onLayout（CoordinatorLayout.java:870） 在android.view上的android.support.design.widget.AppBarLayout $ ScrollingViewBehavior.onLayoutChild（AppBarLayout.java:1391） 。在android.widget.FrameLayout上的android.widget.FrameLayout.layoutChildren（FrameLayout.java:325） 上的android.view.ViewGroup.layout（ViewGroup.java:5631） View.layout（View.java:17687） 。 onLayout（FrameLayout.java:261） 在android.view.View.layout（View.java:17687） 在android.view.ViewGroup.layout（ViewGroup.java:5631） 在android.widget.LinearLayout.setChildFrame（ LinearLayout.java:1762） 在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1606） 在android.widget.LinearLayout.onLayout（LinearLayout.java:1515） 在android.view.View.layout（查看。的java：17687） 在android.view.ViewGroup.layout（ViewGroup.java:5631） 在android.widget.FrameLayout.layoutChildren（FrameLayout.java:325） 在android.widget.FrameLayout.onLayout（FrameLayout.java： 261） 在android.view.View.layout（View.java:17687） 在android.view.ViewGroup.layout（ViewGroup.java:5631） 在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1762）在Android.widget.LinearLayout.layoutVertical（LinearLayout.java:1606） at android.widget.LinearLayout.onLayout（LinearLayout.java:1515） at android.view.View.layout（View.java:17687）在android.widget.FrameLayout.onLayout（FrameLayout.java:261） at android.widget.FrameLayout.layoutChildren（FrameLayout.java:325） at android.view.ViewGroup.layout（ViewGroup.java:5631） at com.android.internal.policy.DecorView.onLayout（DecorView.java:774） at android.view.View.layout（View.java:17687） at android.view.ViewGroup.layout（ViewGroup.java:5631） 在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2511） 在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:2226） 在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1364）（Choreographer.java：at android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6763） at android.view.Choreographer $ CallbackRecord.run（Choreographer.java:923） at android.view.Choreographer.doCallbacks（Choreographer.java： 735） at android.view.Choreographer.doFrame（Choreographer.java:667） at android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:909） at android.os.Handler.handleCallback（Handler.java： 761） at android.os.Handler.dispatchMessage（Handler.java:98） at android.os.Looper.loop（Looper.java:156） at android.app.ActivityThread.main（Activit yThread.java:6524） 在java.lang.reflect.Method.invoke（本机方法） 在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:941） 在com.android.internal .os.ZygoteInit.main（ZygoteInit.java:831） 06-06 00：11：05.238 10571-10571/com.jeebley.jeebley I /过程：发送信号。 PID：10571 SIG：9
**
基本上我只是测试的东西在这里，但我真正想要做的是加载餐馆名称，描述和最小订单金额，我会从API获得，因此，在这两种情况下不显示数据和我不知道为什么或在哪个进程崩溃发生和调试是如此恼人，我不知道大部分的步骤 –
我做了条件检查空状态，我更新了新的异常抛出可以你请看看它 –