A populated RecyclerView is empty

A populated RecyclerView is empty - java

The data model:
public class Information {
String title;}
The adapter:
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.Collections;
import java.util.List;
/**
* Created by anish on 29/12/14.
*/
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {
private LayoutInflater inflator;
List<Information> data = Collections.emptyList();
public MyAdapter(Context context, List<Information> data)
{
inflator = LayoutInflater.from(context);
this.data=data;
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflator.inflate(R.layout.custom_row, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Information current = data.get(position);
holder.text.setText(current.title);
}
#Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder{
TextView text;
public MyViewHolder(View itemView) {
super(itemView);
text = (TextView) itemView.findViewById(R.id.listText);
}
}
}
The navigation drawer fragment:
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
/**
* A simple {#link Fragment} subclass.
*/
public class NavigationDrawerFragment extends Fragment {
private RecyclerView recyclerView;
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private boolean mUserLearnedDrawer;
private boolean mFromSavedInstanceState;
public static final String PREF_FILE_NAME="testpref";
public static final String KEY_USER_LEARNED_DRAWER="user_learned_drawer";
private View containerView;
private MyAdapter adapter;
public NavigationDrawerFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mUserLearnedDrawer = Boolean.getBoolean(readFromPreferences(getActivity(),KEY_USER_LEARNED_DRAWER,"false"));
if(savedInstanceState!=null) mFromSavedInstanceState = true;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View layout = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView = (RecyclerView) layout.findViewById(R.id.drawer_list);
adapter = new MyAdapter(getActivity(),getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
// Inflate the layout for this fragment
return layout;
}
public static List<Information> getData()
{
List<Information> data = new ArrayList<>();
//int icons[]={R.drawable.abc_ic_ab_back_mtrl_am_alpha, R.drawable.abc_ab_share_pack_holo_dark, R.drawable.abc_btn_radio_to_on_mtrl_000};
String[] title = {"Microsoft","Yahoo","Google"};
for(int i=0; i<title.length; i++)
{
Information current = new Information();
//current.iconId = icons[i];
current.title = title[i];
data.add(current);
}
return data;
}
public void setUp(int fragmentID, DrawerLayout drawerLayout, final Toolbar toolbar) {
containerView = getActivity().findViewById(fragmentID);
mDrawerLayout = drawerLayout;
mDrawerToggle=new ActionBarDrawerToggle(getActivity(),drawerLayout,toolbar, R.string.drawer_open, R.string.drawer_close) {
#Override
public void onDrawerOpened(View drawerView) {
if(!mUserLearnedDrawer)
{
mUserLearnedDrawer=true;
saveToPreferences(getActivity(),KEY_USER_LEARNED_DRAWER,mUserLearnedDrawer+"");
}
getActivity().invalidateOptionsMenu();
super.onDrawerOpened(drawerView);
}
#Override
public void onDrawerClosed(View drawerView) {
getActivity().invalidateOptionsMenu();
super.onDrawerClosed(drawerView);
}
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
if(slideOffset<0.6)
{
toolbar.setAlpha(1-slideOffset);
}
}
};
if(!mUserLearnedDrawer && !mFromSavedInstanceState)
{
mDrawerLayout.openDrawer(containerView);
}
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToggle.syncState();
}
});
}
public static void saveToPreferences(Context context, String preferenceName, String preferenceValue)
{
SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(preferenceName, preferenceValue);
editor.apply();
}
public static String readFromPreferences(Context context, String preferenceName, String defaultValue)
{
SharedPreferences sharedPreferences = context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(preferenceName, defaultValue);
}
}
The XML for an individual row I am populating:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="#+id/listText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Dummy Text"
android:gravity="center"
android:textColor="#0000"
android:paddingTop="5dp"
/>
</LinearLayout>
When I run the app, the NavigationDrawer is blank. I first thought of using an ImageView, but then for debugging purposes, I thought of using text only. I did everything I could. Please help.

There is Problem in your Model Class. You should use getter and setter method in model class. The following code may help you.
public class Information {
private String title;
public Model( String title) {
super();
this.title = title;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
In MainActivity.java, set the title in the MainActivity

In my case, i realized that getItemCount() method of the adapter is never called. In this case, setting layoutmanager of recyclerView is solved my problem.
recyclerView.layoutManager = LinearLayoutManager(mainActivity)

(JAVA) I faced a similar issue and the following code worked for me.
The Adapter Functions were not being called for some reasons.
recyclerView.setLayoutManager(new LinearLayoutManager(this));

Related

How do I extablish context for an Activity within a recyclerview adapter

I have buttons within the rows of a recyclerview within a fragment within an activity. When the user clicks one of the buttons, I want to switch to a different activity. How do I establish context for the Intent to switch to the new activity.
OR, should I move the onClickListener back to the fragment or activity (is it incorrect to place onClickListener within the recyclerview adapter code). If so, how do I obtain reference to the button clicked from outside the recyclerview adapter.
Here is the fragment code (CheckInRecentList.java)
package com.example.checkingin;
import android.app.Application;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProvider;
import androidx.recyclerview.widget.DividerItemDecoration;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.google.android.material.snackbar.Snackbar;
import java.util.List;
import static androidx.constraintlayout.widget.Constraints.TAG;
/**
* A simple {#link Fragment} subclass.
* Activities that contain this fragment must implement the
* {#link CheckInRecentList.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {#link CheckInRecentList#newInstance} factory method to
* create an instance of this fragment.
*/
public class CheckInRecentList extends Fragment {
// 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";
private RecyclerView recyclerView;
private RecyclerView.Adapter checkInListAdapter;
//private RecyclerView.LayoutManager layoutManager;
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private MainViewModel mViewModel;
private CheckInListAdapter mAdapter;
private MainViewModelProviderFactory viewModelFactory;
private TextView checkInLastDateTime;
private TextView checkInTitle;
private TextView checkInDestinationName;
private TextView checkInComments;
private Context context;
private OnFragmentInteractionListener mListener;
public CheckInRecentList() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* #param param1 Parameter 1.
* #param param2 Parameter 2.
* #return A new instance of fragment CheckInRecentList.
*/
// TODO: Rename and change types and number of parameters
public static CheckInRecentList newInstance(String param1, String param2) {
CheckInRecentList fragment = new CheckInRecentList();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i(TAG, "onCreate: On Create");
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mViewModel = new ViewModelProvider(this, viewModelFactory).get(MainViewModel.class);
Log.i(TAG, "onCreateView: On Create View");
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_check_in_recent_list, container, false);
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
Log.i(TAG, "onButtonPressed: ");
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
Log.i(TAG, "onAttach: OnAttach");
viewModelFactory = new MainViewModelProviderFactory(context.getApplicationContext());
mViewModel = new ViewModelProvider(this, viewModelFactory).get(MainViewModel.class);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
Log.i(TAG,"OnAttach completed");
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.i(TAG, "onActivityCreated: On Activity Created");
mViewModel = new ViewModelProvider(this, viewModelFactory).get(MainViewModel.class);
mAdapter = new CheckInListAdapter(R.layout.fragment_check_in_recent_list);
RecyclerView recyclerView = getView().findViewById(R.id.check_in_recent_recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.setAdapter(mAdapter);
recyclerView.addItemDecoration(new DividerItemDecoration(getContext(),
LinearLayoutManager.VERTICAL));
observerSetup();
Log.i(TAG, "onActivityCreated: Observer SetUp");
ItemTouchHelper.SimpleCallback callback = new
ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.RIGHT | ItemTouchHelper.LEFT) {
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
return false;
}
#Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
int position = viewHolder.getAdapterPosition();
mAdapter.deleteItem(position);
Snackbar snackbar = Snackbar.make(viewHolder.itemView, "Item " + (direction == ItemTouchHelper.RIGHT ? "deleted" : "archived") + ".", Snackbar.LENGTH_LONG);
snackbar.setAction(android.R.string.cancel, new View.OnClickListener() {
#Override
public void onClick(View view) {
mAdapter.undoDelete();
}
});
snackbar.show();
}
#Override
public void onChildDraw (Canvas c, RecyclerView
recyclerView, RecyclerView.ViewHolder viewHolder,float dX, float dY,
int actionState, boolean isCurrentlyActive){
new RecyclerViewSwipeDecorator.Builder(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
.addSwipeLeftBackgroundColor(ContextCompat.getColor(getContext(), R.color.recycler_view_item_swipe_left_background))
.addSwipeLeftActionIcon(R.drawable.ic_archive_white_24dp)
.addSwipeRightBackgroundColor(ContextCompat.getColor(getContext(), R.color.recycler_view_item_swipe_right_background))
.addSwipeRightActionIcon(R.drawable.ic_delete_white_24dp)
.addSwipeRightLabel(getString(R.string.action_delete))
.setSwipeRightLabelColor(Color.WHITE)
.addSwipeLeftLabel(getString(R.string.action_archive))
.setSwipeLeftLabelColor(Color.WHITE)
.create()
.decorate();
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
};
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(callback);
itemTouchHelper.attachToRecyclerView(recyclerView);
CustomToast newtoast = new CustomToast(getContext(),"you clicked on this" );
newtoast.show();
}
#Override
public void onDetach() {
super.onDetach();
Log.i(TAG, "onDetach: ");
mListener = null;
}
/**
* 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
void onFragmentInteraction(Uri uri);
}
private void clearFields() {
checkInLastDateTime.setText("");
checkInDestinationName.setText("");
checkInTitle.setText("");
checkInComments.setText("");
}
private void observerSetup() {
Log.i(TAG, "observerSetup:");
checkInLastDateTime = getView().findViewById(R.id.checkInLastDateTime);
checkInTitle = getView().findViewById(R.id.checkInTitle);
checkInDestinationName = getView().findViewById(R.id.checkInDestinationName);
checkInComments = getView().findViewById(R.id.checkInComments);
if(mViewModel.getAllCheckIn() != null)
mViewModel.getAllCheckIn().observe(getViewLifecycleOwner(), new Observer<List<CheckInTable>>(){
#Override
public void onChanged(#Nullable final List<CheckInTable> allCheckIn) {
mAdapter.setCheckInList(allCheckIn);
}
});
}
}
Here is the recyclerview adapter code
package com.example.checkingin;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.coordinatorlayout.widget.CoordinatorLayout;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
import static androidx.constraintlayout.widget.Constraints.TAG;
public class CheckInListAdapter extends RecyclerView.Adapter<CheckInListAdapter.ViewHolder>{
private int checkInListLayout;
private List<CheckInTable> checkInList;
private CoordinatorLayout coordinatorLayout;
private RecyclerView recyclerView;
private CheckInTable mRecentlyDeletedItem;
private int mCheckInTablePrimaryKey;
private int mRecentlyDeletedItemPosition;
private Context context;
public CheckInListAdapter(int layoutId) {
Log.i(TAG, "CheckInListAdapter: ");
checkInListLayout = layoutId;
}
public void setCheckInList(List<CheckInTable> allCheckIn) {
checkInList = allCheckIn;
Log.i(TAG, "setCheckInList: ");
notifyDataSetChanged();
}
public void deleteItem(int position) {
mRecentlyDeletedItem = checkInList.get(position);
mRecentlyDeletedItemPosition = position;
checkInList.remove(position);
notifyItemRemoved(position);
}
public void undoDelete() {
checkInList.add(mRecentlyDeletedItemPosition,
mRecentlyDeletedItem);
notifyItemInserted(mRecentlyDeletedItemPosition);
}
#Override
public int getItemCount() {
return checkInList == null ? 0 : checkInList.size();
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Log.i(TAG, "onCreateViewHolder: ");
View view = LayoutInflater.from(
parent.getContext()).inflate(R.layout.recycler_view_item, parent, false);
ViewHolder checkInListViewHolder = new ViewHolder(view);
return checkInListViewHolder;
}
#Override
public void onBindViewHolder(final ViewHolder holder, final int listPosition) {
TextView checkInTablePrimaryKey = holder.checkInTablePrimaryKey;
TextView checkInLastDateTime = holder.checkInLastDateTime;
TextView checkInTitle = holder.checkInTitle;
TextView checkInDestinationName = holder.checkInDestinationName;
TextView checkInComments = holder.checkInComments;
holder.checkInEditButton.setImageResource(R.drawable.ic_menu_edit);
holder.checkInResendButton.setImageResource(R.drawable.ic_menu_share);
Log.i(TAG, "onBindViewHolder: ");
//checkInTablePrimaryKey.setText(checkInList.get(listPosition).getCheckInTablePrimaryKey());
checkInLastDateTime.setText(checkInList.get(listPosition).getCheckInLastDateTime());
checkInTitle.setText(checkInList.get(listPosition).getCheckInTitle());
checkInDestinationName.setText(checkInList.get(listPosition).getCheckInDestinationName());
checkInComments.setText(checkInList.get(listPosition).getCheckInComments());
ImageView checkInEditButton = holder.checkInEditButton;
ImageView checkInResendButton = holder.checkInResendButton;
ImageButton editCheckInButton = checkInEditButton.findViewById(R.id.checkInEditButton);
ImageButton resendCheckInButton = checkInResendButton.findViewById(R.id.checkInResendButton);
editCheckInButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//put in edit check in logic
Integer value = (checkInList.get(listPosition).getCheckInTablePrimaryKey());
Intent intent = new Intent(context, CheckInNew.class);
intent.putExtra("checkInTablePrimaryKey",value);
context.startActivity(intent);
//Bundle extras = getIntent().getExtras();
//if (extras != null) {
// String value = extras.getInt("checkInTablePrimaryKey");
//The key argument here must match that used in the other activity
//}
}
});
resendCheckInButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//put in resend logic
}
});
}
static class ViewHolder extends RecyclerView.ViewHolder {
TextView checkInTablePrimaryKey;
TextView checkInLastDateTime;
TextView checkInTitle;
TextView checkInDestinationName;
TextView checkInComments;
ImageView checkInEditButton;
ImageView checkInResendButton;
ViewHolder(View itemView) {
super(itemView);
Log.i(TAG, "ViewHolder: ");
checkInTablePrimaryKey = itemView.findViewById(R.id.checkInTablePrimaryKey);
checkInLastDateTime = itemView.findViewById(R.id.checkInLastDateTime);
checkInTitle = itemView.findViewById(R.id.checkInTitle);
checkInDestinationName = itemView.findViewById(R.id.checkInDestinationName);
checkInComments = itemView.findViewById(R.id.checkInComments);
checkInEditButton = itemView.findViewById(R.id.checkInEditButton);
checkInResendButton = itemView.findViewById(R.id.checkInResendButton);
}
}
}
Here is the Activity code CheckIn.java
package com.example.checkingin;
import android.net.Uri;
import android.os.Bundle;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import android.view.View;
import android.view.Menu;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.viewpager.widget.PagerAdapter;
import androidx.viewpager.widget.ViewPager;
import com.google.android.material.tabs.TabLayout;
public class CheckIn extends AppCompatActivity implements
CheckInRecentList.OnFragmentInteractionListener,
CheckInApproveRequested.OnFragmentInteractionListener,
CheckInSearch.OnFragmentInteractionListener {
//private AdView mAdView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_check_in);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = findViewById(R.id.fab);
//MobileAds.initialize(this, new OnInitializationCompleteListener() {
// #Override
// public void onInitializationComplete(InitializationStatus initializationStatus) {
// }
//});
//mAdView = findViewById(R.id.adView);
//AdRequest adRequest = new AdRequest.Builder().build();
//mAdView.loadAd(adRequest);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerUtil.getDrawer(this,toolbar);
configureTabLayout();
}
private void configureTabLayout() {
TabLayout tabLayout = findViewById(R.id.check_in_main_tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("Recent"));
tabLayout.addTab(tabLayout.newTab().setText("Approve Requested"));
tabLayout.addTab(tabLayout.newTab().setText("Search"));
final ViewPager viewPager = findViewById(R.id.check_in_main_pager);
final PagerAdapter adapter = new CheckInMainPagerAdapter
(getSupportFragmentManager(),
tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new
TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new
TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
#Override
public void onFragmentInteraction(Uri uri) {
}
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.check_in, menu);
return true;
}
}

In the constructor of CheckInListAdapter pass another argument as context
public CheckInListAdapter(int layoutId, Context context) {
Log.i(TAG, "CheckInListAdapter: ");
checkInListLayout = layoutId;
this.context = context
}

How can i get the 3 textview from recyclerview and pass it to dialogbox

Im new to android programming so can you provide me the right code.
this is my code. the data is from sqlite. my problem is . How can i get the 3 textview from recyclerview and pass it to dialogbox when clicked? i finally made dialogbox but i can get only the position of the item i want to get all of the three textview data. please help me.
FragmentMeal.java
package inncharge.poy.madrigal.innchargev1.fragments;
import android.app.Dialog;
import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import inncharge.poy.madrigal.innchargev1.R;
import inncharge.poy.madrigal.innchargev1.database.DatabaseHelper;
import inncharge.poy.madrigal.innchargev1.adapters.VivzAdapter;
/**
* A simple {#link Fragment} subclass.
* Use the {#link FragmentMeal#newInstance} factory method to
* create an instance of this fragment.
*/
public class FragmentMeal extends Fragment {
private DatabaseHelper db;
private RecyclerView recyclerView;
private VivzAdapter adapter;
// 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";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* #param param1 Parameter 1.
* #param param2 Parameter 2.
* #return A new instance of fragment FragmentMeal.
*/
// TODO: Rename and change types and number of parameters
public static FragmentMeal newInstance(String param1, String param2) {
FragmentMeal fragment = new FragmentMeal();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
public FragmentMeal() {
// 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);
}
db = new DatabaseHelper(getActivity());
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_meal, container, false);
recyclerView = (RecyclerView) view.findViewById(R.id.mealList);
adapter = new VivzAdapter(getActivity(),db.getMealData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getActivity(), recyclerView, new ClickListener() {
#Override
public void onClick(View view, int postion) {
final Dialog dialog = new Dialog(getActivity());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialog.setContentView(R.layout.custom_dialog);
dialog.show();
final EditText editText = (EditText)dialog.findViewById(R.id.editText_pin);
Button submitButton = (Button)dialog.findViewById(R.id.submit_button);
Button cancelButton = (Button)dialog.findViewById(R.id.cancel_button);
submitButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String text = editText.getText().toString();
Toast.makeText(getActivity(), "Pin submitted is : " + text, Toast.LENGTH_SHORT).show();
dialog.cancel();
}
});
cancelButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.cancel();
}
});
}
#Override
public void onLongClick(View view, int position) {
Toast.makeText(getActivity(), "onLongClick" + position, Toast.LENGTH_SHORT).show();
}
}));
return view;
}
class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final ClickListener clickListener){
Log.d("VIVZ", "constructor invoked ");
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener(){
#Override
public boolean onSingleTapUp(MotionEvent e) {
Log.d("VIVZ","onSingleTapUp " + e);
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null){
clickListener.onLongClick(child, recyclerView.getChildAdapterPosition(child));
}
Log.d("VIVZ", "onLongPress " + e);
}
});
}
#Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)){
clickListener.onClick(child, rv.getChildAdapterPosition(child));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
Log.d("VIVZ","onTouchEvent "+ e);
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
public static interface ClickListener {
public void onClick(View arg1, int arg2);
public void onLongClick(View view, int position);
}
}
VivzAdapter.java
package inncharge.poy.madrigal.innchargev1.adapters;
import android.content.ClipData;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Collections;
import java.util.List;
import inncharge.poy.madrigal.innchargev1.R;
import inncharge.poy.madrigal.innchargev1.fragments.FragmentMeal;
import inncharge.poy.madrigal.innchargev1.pojo.Contact;
import inncharge.poy.madrigal.innchargev1.pojo.Information;
/**
* Created by Madrigal on 7/18/2015.
*/
public class VivzAdapter extends RecyclerView.Adapter<VivzAdapter.MyViewHolder> {
private Context context;
private final LayoutInflater inflater;
List<Contact> data = Collections.emptyList();
public VivzAdapter(Context context, List<Contact> data){
this.context=context;
inflater = LayoutInflater.from(context);
this.data=data;
}
public void delete(int position){
data.remove(position);
notifyItemRemoved(position);
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.custom_row, parent, false);
Log.d("VIVZ","onCreateHolder called ");
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Contact current = data.get(position);
Log.d("VIVZ", "onBindViewHolder called " + position);
holder.itemId.setText(String.valueOf(current.getId()));
holder.title.setText(current.getName());
holder.email.setText(current.getEmail());
}
#Override
public int getItemCount() {
return data.size();
}
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView title;
public TextView email;
public TextView itemId;
public MyViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.listTextName);
email = (TextView) itemView.findViewById(R.id.listTextUname);
itemId = (TextView) itemView.findViewById(R.id.listTextId);
}
#Override
public void onClick(View v) {
}
}
}

Slidenerd makes some great videos, he helped me a lot as well when I started.
You might want to reconsider what you're trying to do and approach it differently... Why would you want to pass 3 textview from your UI into a dialog?
This is going to be painful.
Seems like you're going to have to extend DialogFragment (i'm assuming that's what you're using for a dialog, maybe an alert?). Create a static factory method inside the DialogFragment like this...
public class MyDialog extends DialogFragment {
private static tv1, tv2, tv3;
public static MyDialog newInstance(TextView tv1, TextView tv2, TextView tv3){
MyDialog.tv1 = tv1;
MyDialog.tv2 = tv2;
MyDialog.tv3 = tv3;
return new MyDialog();
}
}
Once you have this complete, create this dialog fragment inside that onClick method in the ViewHolder class. Instantiate the DialogFragment by doing this...
MyDialog.newInstance(title,email,itemId).show(getFragmentManager(),"dialog_tag");
Like i said before, it's seems sloppy and is probably error prone. There may be a better way of doing this but this is all I can think of off the top of my head. Let me know how it works out for you.. or perhaps revise your question so we can better help you reach a better solution to what you're trying to do.

Error GetData() when make adapter variable

I was watch Android tutorial from Slidenerd about make Recycle View on Android. This the link: https://www.youtube.com/watch?v=OoCySqneJno.
When i make a adapter variable, i got an error. This is my full code:
NavigationDrawerFragment.java
package com.balinez.wdharmana.doahindu;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.support.v7.widget.Toolbar;
import java.util.ArrayList;
import java.util.List;
/**
* A simple {#link Fragment} subclass.
*/
public class NavigationDrawerFragment extends Fragment {
private RecyclerView recyclerView;
public static final String PREF_FILE_NAME="testpref";
public static final String KEY_USER_LEARNED_DRAWER="user_learned_drawer";
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private BalinezAdapter adapter;
private boolean mUserLearnedDrawer;
private boolean mFromSavedInstanceState;
private View containerView;
public NavigationDrawerFragment() {
// Required empty public constructor
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUserLearnedDrawer=Boolean.valueOf(readFromPreferences(getActivity(), KEY_USER_LEARNED_DRAWER,"false"));
if(savedInstanceState!=null) {
mFromSavedInstanceState=true;
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View layout = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView=(RecyclerView) layout.findViewById(R.id.drawer_list);
adapter = new BalinezAdapter(getActivity(),getData());
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
return layout;
}
public static List<Information> getData() {
List<Information> data = new ArrayList<>();
int[] icons = {R.drawable.ic_bookmark1, R.drawable.ic_bookmark1};
String[] titles={"Doa Sehari-Hari", "Doa Sembahyang"};
for (int i=0; i<titles.length && i<icons.length; i++) {
Information current = new Information();
current.iconId = icons[i];
current.title = titles[i];
data.add(current);
}
return data;
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, Toolbar toolbar) {
containerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if(!mUserLearnedDrawer) {
mUserLearnedDrawer=true;
saveToPreferences(getActivity(),KEY_USER_LEARNED_DRAWER,mUserLearnedDrawer+"");
}
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().invalidateOptionsMenu();
}
};
if(!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(containerView);
}
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToggle.syncState();
}
});
}
public static void saveToPreferences(Context context, String preferenceName, String preferenceValue) {
SharedPreferences sharedPreferences=context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(preferenceName,preferenceValue);
editor.apply();
}
public static String readFromPreferences(Context context, String preferenceName, String defaultValue) {
SharedPreferences sharedPreferences=context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(preferenceName, defaultValue);
}
}
I got an error in this code:
adapter = new BalinezAdapter(getActivity(),getData());
I also include my Adapter source code:
package com.balinez.wdharmana.doahindu;
import android.content.Context;
import android.support.v7.internal.view.menu.MenuView;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.Collections;
import java.util.List;
/**
* Created by WDHARMANA on 27/07/2015.
*/
public class BalinezAdapter extends RecyclerView.Adapter <BalinezAdapter.MyViewHolder> {
private LayoutInflater inflater;
List<Information> data= Collections.emptyList();
public BalinezAdapter(Context context) {
inflater=LayoutInflater.from(context);
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.custom_row, parent,false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Information current=data.get(position);
holder.title.setText(current.title);
holder.icon.setImageResource(current.iconId);
}
#Override
public int getItemCount() {
return 0;
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title;
ImageView icon;
public MyViewHolder(View itemView) {
super(itemView);
title= (TextView) itemView.findViewById(R.id.listText);
icon= (ImageView) itemView.findViewById(R.id.listIcon);
}
}
}
This is information.java file:
package com.balinez.wdharmana.doahindu;
/**
* Created by WDHARMANA on 27/07/2015.
*/
public class Information {
int iconId;
String title;
}
I have try solution on some Stackoverflow thread. But it doestn't work for me. If you have same problem, you can share it for us. Thanks for advance!

Your adapter constructor is
public BalinezAdapter(Context context) {
inflater=LayoutInflater.from(context);
}
While you have
new BalinezAdapter(getActivity(),getData());
You missed the second argument in the adapter.
Just change to
List<Information> data;
public BalinezAdapter(Context context,List<Information> mList) {
inflater=LayoutInflater.from(context);
data = mList;
}
and change this
#Override
public int getItemCount() {
return 0;
}
to
#Override
public int getItemCount() {
return data.size();
}

Navigation drawer icon is not displaying correctly

I followed a tutorial on how to add a navigation drawer to my app. I got it mostly working however after using the navigation drawer the icon is always an arrow pointing to the left. I read that many people forget to add the onPostCreate method. However after adding that method the issue continued.
Note: that the xml layout for the navigation drawer is blank
ProjectsList.java
package com.austinerck.projectteamwork;
import android.content.Context;
import android.os.PersistableBundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v4.widget.SwipeRefreshLayout;
import android.os.Bundle;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.CardView;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import java.util.ArrayList;
public class ProjectsList extends AppCompatActivity {
ActionBarDrawerToggle drawerToggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_projects_list);
//Toolbar
setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
if(getSupportActionBar() != null) {
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
//Navigation Drawer
NavigationDrawerFragment navigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.fragmentNavigationDrawer);
navigationDrawerFragment.setup((DrawerLayout) findViewById(R.id.drawerLayout), (Toolbar) findViewById(R.id.toolbar));
drawerToggle = navigationDrawerFragment.getDrawerToggle();
//SwipeRefreshLayout
final SwipeRefreshLayout swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefresher);
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
//TODO: Refresh code goes here
swipeRefreshLayout.setRefreshing(false);
}
});
swipeRefreshLayout.setColorSchemeColors(R.color.colorPrimary);
//RecyclerView
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(new ProjectsListAdapter());
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_projects_list, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (drawerToggle.onOptionsItemSelected(item)) {
return true;
}
int id = item.getItemId();
switch (id){
case R.id.action_refresh:
break;
case R.id.action_sort:
break;
case R.id.action_feedback:
break;
case R.id.action_settings:
break;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
drawerToggle.syncState();
}
}
class ProjectsListAdapter extends RecyclerView.Adapter{
private ArrayList<ProjectsListInfo> projectInfo = new ArrayList<>();
ProjectsListAdapter(){
//TODO: Load in information to projectInfo
projectInfo.add(new ProjectsListInfo(NasaProjects.GEMINI));
projectInfo.add(new ProjectsListInfo(NasaProjects.APOLLO));
projectInfo.add(new ProjectsListInfo(NasaProjects.ISS));
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
final View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.fragment_project_card, viewGroup, false);
CardView card = (CardView) view.findViewById(R.id.projectCard);
TextView name1 = (TextView) view.findViewById(R.id.projectName);
TextView creator = (TextView) view.findViewById(R.id.creator);
TextView description = (TextView) view.findViewById(R.id.description);
RelativeLayout background = (RelativeLayout) view.findViewById(R.id.background);
Button buttonViewProject = (Button) view.findViewById(R.id.button_view_project);
Button buttonDescription = (Button) view.findViewById(R.id.button_description);
buttonViewProject.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Shortcut.toast(view.getContext(), "View Project Clicked!");
}
});
buttonDescription.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Shortcut.toast(view.getContext(), "Description Clicked");
}
});
return new ProjectCardView(view, card, name1, creator, description, background, buttonViewProject, buttonDescription);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int i) {
ProjectCardView view;
view = (ProjectCardView) viewHolder;
view.name.setText(projectInfo.get(i).getName());
view.creator.setText("Created by " + projectInfo.get(i).getCreator());
view.description.setText(projectInfo.get(i).getDescription());
view.background.setBackgroundResource(projectInfo.get(i).getBackground());
}
#Override
public int getItemCount() {
return projectInfo.size();
}
class ProjectCardView extends RecyclerView.ViewHolder /*implements View.OnClickListener*/{
View itemView;
CardView card;
TextView name, creator, description;
RelativeLayout background;
Button buttonViewProject, buttonDescription;
Context context;
public ProjectCardView(View view, CardView card, TextView name, TextView creator, TextView description, RelativeLayout background, Button buttonViewProject, Button buttonDescription) {
super(view);
context = view.getContext();
this.itemView = view;
this.card = card;
this.name = name;
this.creator = creator;
this.description = description;
this.background = background;
this.buttonViewProject = buttonViewProject;
this.buttonDescription = buttonDescription;
}
}
}
class ProjectsListInfo{
private String name, creator, description;
private int background;
//TODO: Use this to bundle information from the server
/*ProjectsListInfo(String name, String creator, String description, int background){
this.name = name;
this.creator = creator;
this.description = description;
this.background = background;
}*/
ProjectsListInfo(NasaProjects exampleProject){
name = exampleProject.getName();
creator = exampleProject.getCreator();
description = exampleProject.getDesc();
background = exampleProject.getBackground();
}
public String getName() {
return name;
}
public String getCreator() {
return creator;
}
public String getDescription() {
return description;
}
public int getBackground() {
return background;
}
}
NavigationDraweFragment.java
package com.austinerck.projectteamwork;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class NavigationDrawerFragment extends Fragment {
private ActionBarDrawerToggle drawerToggle;
public NavigationDrawerFragment() {}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
}
public void setup(DrawerLayout drawerLayout, Toolbar toolbar){
drawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.nav_drawer_open, R.string.nav_drawer_close){
#Override
public void onDrawerOpened(View drawerView){
super.onDrawerOpened(drawerView);
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerClosed(View drawerView){
super.onDrawerOpened(drawerView);
getActivity().invalidateOptionsMenu();
}
};
drawerLayout.setDrawerListener(drawerToggle);
drawerLayout.post(new Runnable() {
#Override
public void run() {
drawerToggle.syncState();
}
});
}
public ActionBarDrawerToggle getDrawerToggle() {
return drawerToggle;
}
}
activity_projects_list.xml
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawerLayout"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
tools:context=".ProjectsList">
<include
android:id="#+id/toolbar"
layout="#layout/fragment_toolbar"/>
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipeRefresher"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="#dimen/paddingSmall"
android:paddingRight="#dimen/paddingSmall"/>
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
<fragment
android:id="#+id/fragmentNavigationDrawer"
android:layout_width="#dimen/drawerWidth"
android:layout_height="match_parent"
android:layout_gravity="start"
app:layout="#layout/fragment_navigation_drawer"
android:name="com.austinerck.projectteamwork.NavigationDrawerFragment"/>
</android.support.v4.widget.DrawerLayout>

Please change
getSupportActionBar().setDisplayShowHomeEnabled(true);
to
getSupportActionBar().setDisplayShowHomeEnabled(false);
this should do the trick.

Can't Resolve Symbol Drawable on Array

I have an code on Android Studio, like this:
public static void getData() {
List<Information> data = new ArrayList<>();
int[] icons = (R.drawable.ic_bookmark1, R.drawable.ic_bookmark2);
}
I got an error on line:
int[] icons = (R.drawable.ic_bookmark1, R.drawable.ic_bookmark2);
The error said on:
Can't resolve Symbol Drawable.
And also error said on:
Can't resolve Symbol ic_bookmark2;
Screenshot:
I have put my icon in res folder
The code and error
This is the full code of my .java file.
package com.balinez.wdharmana.doahindu;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.support.v7.widget.Toolbar;
import java.util.ArrayList;
import java.util.List;
/**
* A simple {#link Fragment} subclass.
*/
public class NavigationDrawerFragment extends Fragment {
private RecyclerView recyclerView;
public static final String PREF_FILE_NAME="testpref";
public static final String KEY_USER_LEARNED_DRAWER="user_learned_drawer";
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private BalinezAdapter adapter;
private boolean mUserLearnedDrawer;
private boolean mFromSavedInstanceState;
private View containerView;
public NavigationDrawerFragment() {
// Required empty public constructor
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mUserLearnedDrawer=Boolean.valueOf(readFromPreferences(getActivity(), KEY_USER_LEARNED_DRAWER,"false"));
if(savedInstanceState!=null) {
mFromSavedInstanceState=true;
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View layout = inflater.inflate(R.layout.fragment_navigation_drawer, container, false);
recyclerView=(RecyclerView) layout.findViewById(R.id.drawer_list);
return layout;
}
public static void getData() {
List<Information> data = new ArrayList<>();
int[] icons = (R.drawable.ic_bookmark1, R.drawable.ic_bookmark1);
}
public void setUp(int fragmentId, DrawerLayout drawerLayout, Toolbar toolbar) {
containerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
mDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close) {
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if(!mUserLearnedDrawer) {
mUserLearnedDrawer=true;
saveToPreferences(getActivity(),KEY_USER_LEARNED_DRAWER,mUserLearnedDrawer+"");
}
getActivity().invalidateOptionsMenu();
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
getActivity().invalidateOptionsMenu();
}
};
if(!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(containerView);
}
mDrawerLayout.setDrawerListener(mDrawerToggle);
mDrawerLayout.post(new Runnable() {
#Override
public void run() {
mDrawerToggle.syncState();
}
});
}
public static void saveToPreferences(Context context, String preferenceName, String preferenceValue) {
SharedPreferences sharedPreferences=context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString(preferenceName,preferenceValue);
editor.apply();
}
public static String readFromPreferences(Context context, String preferenceName, String defaultValue) {
SharedPreferences sharedPreferences=context.getSharedPreferences(PREF_FILE_NAME, Context.MODE_PRIVATE);
return sharedPreferences.getString(preferenceName, defaultValue);
}
}

I believe the issue lies in the use of parentheses and you should be using brackets.
int[] icons = (R.drawable.ic_bookmark1, R.drawable.ic_bookmark2);
should be
int[] icons = {R.drawable.ic_bookmark1, R.drawable.ic_bookmark2};

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Java is a programming language and computing platform first released by Sun Microsystems in 1995.

A populated RecyclerView is empty - java

In my case, i realized that getItemCount() method of the adapter is never called. In this case, setting layoutmanager of recyclerView is solved my problem. recyclerView.layoutManager = LinearLayoutManager(mainActivity)

(JAVA) I faced a similar issue and the following code worked for me. The Adapter Functions were not being called for some reasons. recyclerView.setLayoutManager(new LinearLayoutManager(this));

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