ThreeFragment should reload 1 times to show the RecyclerView,Asynchronus task

ThreeFragment should reload 1 times to show the RecyclerView,Asynchronus task - java

I have ViewPager TabLayout which hosts 3 Fragments. Each Fragment contain ListView and data from Firebase. FragmentOne and FragmentTwo running with no problem,The problem isin FragmentThree raises blank screen. But after i reload FragmentThree 1 times like on this video the data and RecyclerView just appeared
https://streamable.com/zh861
MainActivity.java
package com.example.yehezkiel.eclassapp;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
private List<MataKuliah> listMatkul = new ArrayList<>();
private ArrayList<String> keys = new ArrayList<>();
private myAdapter myAdapter;
private Button logoutBtn;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener authListener;
private RecyclerView mRecycleView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mToggle;
private Toolbar mToolbar;
private NavigationView mNavigationView;
private TextView mTextName;
private TextView mTextNim;
static {
FirebaseDatabase.getInstance().setPersistenceEnabled(true);
}
DatabaseReference userRef = FirebaseDatabase.getInstance().getReference("users");
FirebaseUser users = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference mataKuliahRef = FirebaseDatabase.getInstance().getReference("courses");
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
mAuth = FirebaseAuth.getInstance();
//Navbar menu
mToolbar = (Toolbar) findViewById(R.id.navbaraction);
setSupportActionBar(mToolbar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawabel_main);
mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mNavigationView = (NavigationView) findViewById(R.id.nav_menu);
View header = mNavigationView.getHeaderView(0);
mTextName = (TextView) header.findViewById(R.id.header_name);
mTextNim = (TextView) header.findViewById(R.id.header_nim);
//Tab Layout
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()) {
case (R.id.tugas):
break;
case (R.id.logout_menu):
signOut();
break;
}
return true;
}
});
userRef.child(users.getUid()).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
String name = (String) dataSnapshot.child("name").getValue().toString();
String nim = (String) dataSnapshot.child("nim").getValue().toString();
mTextNim.setText(nim);
mTextName.setText(name);
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
authListener = new FirebaseAuth.AuthStateListener() {
#Override
public void onAuthStateChanged(#NonNull FirebaseAuth firebaseAuth) {
FirebaseUser user = firebaseAuth.getCurrentUser();
if (user == null) {
startActivity(new Intent(MainActivity.this, LoginActivity.class));
finish();
}
}
};
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new OneFragment(), "Beranda");
adapter.addFragment(new TwoFragment(), "Tugas");
adapter.addFragment(new ThreeFragment(), "Pengumuman");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(mToggle.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
private void signOut() {
mAuth.signOut();
}
#Override
public void onStart() {
super.onStart();
mAuth.addAuthStateListener(authListener);
}
}
ThreeFragment.java
package com.example.yehezkiel.eclassapp;
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.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class ThreeFragment extends Fragment {
View v;
private List<DaftarPengumuman> listPengumuman = new ArrayList<>();
private ArrayList<String> obj3 = new ArrayList<>();
List<ListItem> consolidatedList = new ArrayList<>();
private RecyclerView mRecyclerView;
private RecyclerView.Adapter adapter;
private FirebaseAuth mAuth;
private DatabaseReference userRef;
private FirebaseUser users;
private DatabaseReference mataKuliahRef;
private DatabaseReference daftarPengumumanRef;
public ThreeFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
v = inflater.inflate(R.layout.fragment_three, container, false);
userRef = FirebaseDatabase.getInstance().getReference("users");
users = FirebaseAuth.getInstance().getCurrentUser();
mataKuliahRef = FirebaseDatabase.getInstance().getReference("courses");
daftarPengumumanRef = FirebaseDatabase.getInstance().getReference("pengumuman");
mAuth = FirebaseAuth.getInstance();
mRecyclerView = (RecyclerView) v.findViewById(R.id.PengumumanRView);
mRecyclerView.setHasFixedSize(true);
adapter = new PengumumanAdapter(getActivity().getApplicationContext(), consolidatedList);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(layoutManager);
mRecyclerView.setAdapter(adapter);
userRef.child(users.getUid()).child("courses").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(final DataSnapshot dataSnapshot) {
obj3.clear();
if(dataSnapshot.exists()){
long datacount = dataSnapshot.getChildrenCount();
int i = 0;
for(DataSnapshot dataHasil : dataSnapshot.getChildren()){
final String idCourse = dataHasil.getKey();
obj3.add(idCourse);
Log.e("anjay",obj3.toString());
if(datacount-1 == i){
queryObj3();
}
i++;
}
}else {
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
HashMap<String, List<DaftarPengumuman>> groupedHashMap = groupDataIntoHashMap(listPengumuman);
for (String nama_p : groupedHashMap.keySet()) {
PengumumanItem nameItem = new PengumumanItem();
nameItem.setNama_matkul(nama_p);
consolidatedList.add(nameItem);
for (DaftarPengumuman daftarPengumuman : groupedHashMap.get(nama_p)) {
GeneralItem generalItem = new GeneralItem();
generalItem.setDaftarPengumuman(daftarPengumuman);//setBookingDataTabs(bookingDataTabs);
consolidatedList.add(generalItem);
}
}
return v;
}
public void queryObj3(){
for(int j = 0 ; j<obj3.size() ;j++){
mataKuliahRef.child(obj3.get(j)).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(final DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
if (dataSnapshot.hasChild("pengumuman")) {
final String name = (String) dataSnapshot.child("name").getValue();
for (DataSnapshot idKeyPeng : dataSnapshot.child("pengumuman").getChildren()) {
daftarPengumumanRef.child(idKeyPeng.getKey()).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot2) {
DaftarPengumuman pengumuman = new DaftarPengumuman();
pengumuman = dataSnapshot2.getValue(DaftarPengumuman.class);
pengumuman.setNama_p(name);
listPengumuman.add(pengumuman);
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}
private HashMap<String, List<DaftarPengumuman>> groupDataIntoHashMap(List<DaftarPengumuman> listOfDaftarPengumuman) {
HashMap<String, List<DaftarPengumuman>> groupedHashMap = new HashMap<>();
for (DaftarPengumuman daftarPengumuman : listOfDaftarPengumuman) {
String hashMapKey = daftarPengumuman.getNama_p();
if (groupedHashMap.containsKey(hashMapKey)) {
// The key is already in the HashMap; add the pojo object
// against the existing key.
groupedHashMap.get(hashMapKey).add(daftarPengumuman);
} else {
// The key is not there in the HashMap; create a new key-value pair
List<DaftarPengumuman> list = new ArrayList<>();
list.add(daftarPengumuman);
groupedHashMap.put(hashMapKey, list);
}
}
return groupedHashMap;
}
}
MainActivity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.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"
android:id="#+id/drawabel_main"
tools:context="com.example.yehezkiel.eclassapp.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<include
layout="#layout/navbar_action"
android:layout_width="match_parent"
android:layout_height="wrap_content"></include>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:tabGravity="fill"
app:tabMode="fixed" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</LinearLayout>
<android.support.design.widget.NavigationView
android:layout_width="wrap_content"
android:layout_height="match_parent"
app:menu="#menu/navbar_main"
android:layout_gravity="start"
app:headerLayout="#layout/navbar_header"
android:id="#+id/nav_menu">
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>

Related

[Android Studio]How to start an Activity from a nested Recycleview in a Fragment?

I want to click on a custom object in my RecycleView, which then starts a new Activity inclusive Data about the object clicked but i get no response on clicking.
I tried following this question but either I did something wrong or it doesn't work.
JokeCategory
package com.example.jokestarapplication;
import android.os.Parcel;
import android.os.Parcelable;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
public class JokeCategory implements Parcelable{
private String name;
private List<Joke> jokes;
public JokeCategory(String name) {
this.name = name;
this.jokes= new ArrayList<>();
}
protected JokeCategory(Parcel in){
name=in.readString();
in.readList(jokes,List.class.getClassLoader());
}
public JokeCategory(String name, List<Joke> jokes) {
this.name = name;
this.jokes = jokes;
}
public static final Creator<JokeCategory> CREATOR = new Creator<JokeCategory>() {
#Override
public JokeCategory createFromParcel(Parcel in) {
return new JokeCategory(in);
}
#Override
public JokeCategory[] newArray(int size) {
return new JokeCategory[size];
}
};
public String getName() {
return name;
}
public String getJokeNumString() {
return String.valueOf(jokes.size());
}
public List<Joke> getJokes() {
return jokes;
}
#Override
public String toString() {
return name;
}
public void addJoke(Joke joke) {
jokes.add(joke);
}
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(name);
dest.writeList(jokes);
}
}
CategoryListAdapter
package com.example.jokestarapplication;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class CategoryListAdapter extends RecyclerView.Adapter<CategoryListAdapter.CategoryViewHolder> {
private List<JokeCategory> mItems;
private Context mContext;
private ListItemClickListener mListItemClickListener;
public CategoryListAdapter(List<JokeCategory> mItems, Context mContext, ListItemClickListener mListItemClickListener) {
this.mItems = mItems;
this.mContext = mContext;
this.mListItemClickListener = mListItemClickListener;
}
#Override
public int getItemViewType(final int position) {
return R.layout.category_list_item;
}
#NonNull
#Override
public CategoryViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
Context context = parent.getContext();
mContext = context;
LayoutInflater inflater = LayoutInflater.from(context);
View view = inflater.inflate(R.layout.category_list_item, parent, false);
return new CategoryViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull CategoryViewHolder holder, int position) {
holder.bind(position);
}
#Override
public int getItemCount() {
return (mItems==null) ? 0 : mItems.size();
}
interface ListItemClickListener {
void onListItemClick(JokeCategory item);
}
public void setOnListItemClickListener(ListItemClickListener listItemClickListener) {
mListItemClickListener = listItemClickListener;
}
public class CategoryViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
private TextView tvCatName, tvCatNum;
public CategoryViewHolder(#NonNull View itemView) {
super(itemView);
tvCatName = itemView.findViewById(R.id.tvCatName);
tvCatNum = itemView.findViewById(R.id.tvCatNum);
}
public TextView getTvCatName() {
return tvCatName;
}
public TextView getTvCatNum() {
return tvCatNum;
}
public void bind(int position) {
tvCatName.setText(mItems.get(position).getName());
tvCatNum.setText(mItems.get(position).getJokeNumString());
}
#Override
public void onClick(View v) {
if (mListItemClickListener!=null){
int clickedIndex = getAdapterPosition();
JokeCategory jokeCategory = mItems.get(clickedIndex);
mListItemClickListener.onListItemClick(jokeCategory);
}
}
}
}
MainFragment
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.LinkedList;
import java.util.List;
public class MainFragment extends Fragment implements CategoryListAdapter.ListItemClickListener {
private CategoryListAdapter mAdapter;
private RecyclerView rvcategories;
private List<JokeCategory> categories;
private onCategoryITemSelected listener;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main, container, false);
categories = (List<JokeCategory>) getArguments().getSerializable("Categories");
// Add the following lines to create RecyclerView
rvcategories = view.findViewById(R.id.rvcategories);
rvcategories.setHasFixedSize(true);
rvcategories.setLayoutManager(new LinearLayoutManager(view.getContext()));
mAdapter = new CategoryListAdapter(categories, getContext(), this);
rvcategories.setAdapter(mAdapter);
return view;
}
#Override
public void onResume() {
categories = (List<JokeCategory>) getArguments().getSerializable("Categories");
rvcategories.getAdapter().notifyDataSetChanged();
super.onResume();
}
#Override
public void onAttach(#NonNull Context context) {
super.onAttach(context);
if (context instanceof onCategoryITemSelected)
listener = (onCategoryITemSelected) context;
else
throw new ClassCastException(context.toString() + "must implement listener");
}
#Override
public void onListItemClick(JokeCategory item) {
Intent i = new Intent(getContext(), ActivityCategory.class);
i.putExtra(ActivityCategory.KEY_EXTRACATEGORY, item);
startActivity(i);
}
public interface onCategoryITemSelected {
void onListItemClick(JokeCategory item);
}
private List<JokeCategory> DemoData() {
List<JokeCategory> data = new LinkedList<>();
data.add(new JokeCategory("Short Jokes"));
data.add(new JokeCategory("Long Jokes"));
data.add(new JokeCategory("One Liner"));
data.add(new JokeCategory("Dumb Jokes"));
data.add(new JokeCategory("Chuck Norris"));
return data;
}
}
MainActivity
import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.view.GravityCompat;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.auth.api.signin.GoogleSignIn;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInClient;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.material.navigation.NavigationView;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener{
//global available user data
public static String displayUserName;
public static String displayUserEmail;
GoogleSignInClient mGoogleSignInClient;
private TextView displayName;
private TextView displayEmail;
private DrawerLayout drawerLayout;
private ActionBarDrawerToggle actionBarDrawerToggle;
private Toolbar toolbar;
private NavigationView navigationView;
private FragmentManager fragmentManager;
private FragmentTransaction fragmentTransaction;
private List<JokeCategory> categories;
private Bundle bundle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawerLayout = findViewById(R.id.drawer);
navigationView = findViewById(R.id.navigationView);
navigationView.setNavigationItemSelectedListener(this);
actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open, R.string.close);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.setDrawerIndicatorEnabled(true);
actionBarDrawerToggle.syncState();
categories = DemoData();
bundle = new Bundle();
bundle.putSerializable("Categories", (Serializable) categories);
//load default fragment
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
MainFragment mainFragment = new MainFragment();
mainFragment.setArguments(bundle);
fragmentTransaction.replace(R.id.container_fragment, mainFragment);
fragmentTransaction.commit();
// Configure sign-in to request the user's ID, email address, and basic
// profile. ID and basic profile are included in DEFAULT_SIGN_IN.
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
// Build a GoogleSignInClient with the options specified by gso.
mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
// Side navigation elements (needs headerView since sidenav can be hidden (null)
View headerView = navigationView.getHeaderView(0);
displayName = (TextView) headerView.findViewById(R.id.displayName);
displayEmail = (TextView) headerView.findViewById(R.id.displayEmail);
GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(this);
if (account != null) {
//account.getDisplayName()
Log.d("AUTH", "User is logged-in automatically");
Toast.makeText(this, "Google Login automatically (already signed in previously)",
Toast.LENGTH_LONG).show();
updateMainActivityUI(account);
} else {
Log.d("AUTH", "User is NOT logged-in automatically");
}
}
public void updateMainActivityUI(GoogleSignInAccount account) {
// Global vars
displayUserName = account.getDisplayName();
displayUserEmail = account.getEmail();
//Side nav vars
Log.d("AUTH", "side nav vars: " + displayUserName);
Log.d("AUTH", "side nav vars: " + displayUserEmail);
// if (displayUserName != null) {
displayName.setText(displayUserName);
// }
// if (displayUserEmail != null) {
displayEmail.setText(displayUserEmail);
// }
}
//move to new Fragment
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
drawerLayout.closeDrawer(GravityCompat.START);
bundle = new Bundle();
bundle.putSerializable("Categories", (Serializable) categories);
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
switch (item.getItemId()) {
case R.id.home:
MainFragment mainFragment = new MainFragment();
mainFragment.setArguments(bundle);
fragmentTransaction.replace(R.id.container_fragment, mainFragment);
break;
case R.id.newJoke:
NewJokeFragment newJokeFragment = new NewJokeFragment();
newJokeFragment.setArguments(bundle);
fragmentTransaction.replace(R.id.container_fragment, newJokeFragment);
break;
case R.id.logInOut:
fragmentTransaction.replace(R.id.container_fragment, new LogInOutFragment());
break;
case R.id.aboutUs:
fragmentTransaction.replace(R.id.container_fragment, new AboutUsFragment());
break;
case R.id.register:
fragmentTransaction.replace(R.id.container_fragment, new RegisterFragment());
break;
}
fragmentTransaction.commit();
return true;
}
private List<JokeCategory> DemoData() {
List<JokeCategory> data = new ArrayList<>();
data.add(new JokeCategory("Short Jokes"));
data.add(new JokeCategory("Long Jokes"));
data.add(new JokeCategory("One Liner"));
data.add(new JokeCategory("Dumb Jokes"));
data.add(new JokeCategory("Chuck Norris"));
return data;
}
public void updateCategories(List<JokeCategory> list){
categories = list;
}
}

It looks like the itemView.onClickListener is never registered.
add the following line to the constructor.
itemView.setOnClickListener(this);
It would look like:
public CategoryViewHolder(#NonNull View itemView) {
super(itemView);
itemView.setOnClickListener(this);
tvCatName = itemView.findViewById(R.id.tvCatName);
tvCatNum = itemView.findViewById(R.id.tvCatNum);
}

Everytime I have to change something to reflect [closed]

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Closed 4 years ago.
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In my chat App FriendsFragment is shwoing blank. If I want to reflect that then, I have run the app, open the Friends tab in my app and after Instant run in Android studio and it will reflect. If it will not, then I have to add Log statement anywhere in my FriendsFragment, and run Instant run with exctly the open tab of friendsfragmet.
Why I'm telling you to add Log statement is necessary because I found this bug that whenever I change something on my Friends Fragment and then run Instant run, then only it will show the Fragment part. And I have to do this every time, otherwise it won't show. Add Log statement and remove second time, or change tag or change message, do something that makes the changes, and must run Instant run (that Yellow symbol like booster).
NOTE: I'm still doing this thing, I observe this problem by myself and I also don't know why I have to change something every time to show this Fragment? I also built the similar fragment in this same app, but for that there is no problem!
FriendFragment
package com.jimmytrivedi.lapitchat;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.Fragment;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.LinearLayoutManager;
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.ImageView;
import android.widget.TextView;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;
import com.squareup.picasso.Picasso;
import de.hdodenhof.circleimageview.CircleImageView;
public class FriendsFragment extends Fragment {
private RecyclerView FriendRecyclerView;
private DatabaseReference databaseReference, UsersDatabaseReference;
private FirebaseAuth mAuth;
private String currentUID;
private View MainView;
public FriendsFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
MainView = inflater.inflate(R.layout.fragment_friend, container, false);
FriendRecyclerView = MainView.findViewById(R.id.FriendRecyclerView);
mAuth = FirebaseAuth.getInstance();
if (mAuth.getCurrentUser() != null) {
currentUID = mAuth.getCurrentUser().getUid();
databaseReference = FirebaseDatabase.getInstance().getReference().child("Friends").child(currentUID);
databaseReference.keepSynced(true);
UsersDatabaseReference = FirebaseDatabase.getInstance().getReference().child("Users");
UsersDatabaseReference.keepSynced(true);
}
FriendRecyclerView.setHasFixedSize(true);
FriendRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
Log.d("wihddiewd", "Is it going?");
return MainView;
}
#Override
public void onStart() {
super.onStart();
Query query = FirebaseDatabase. getInstance()
.getReference()
.child("Friends")
.limitToLast(50);
FirebaseRecyclerOptions<Friends> options = new FirebaseRecyclerOptions.Builder<Friends>()
.setQuery(query, Friends.class)
.build();
final FirebaseRecyclerAdapter<Friends, FriendsViewHolder> FriendsRecyclerViewAdapter = new
FirebaseRecyclerAdapter<Friends, FriendsViewHolder>(options) {
#Override
protected void onBindViewHolder(#NonNull final FriendsViewHolder holder, int position, #NonNull Friends model) {
holder.setDate(model.getDate());
final String listUID = getRef(position).getKey();
UsersDatabaseReference.child(listUID).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
final String userName = dataSnapshot.child("Name").getValue().toString();
String thumbImage = dataSnapshot.child("thumbImage").getValue().toString();
String userOnline = dataSnapshot.child("Online").getValue().toString();
holder.setName(userName);
holder.setThumbImage(thumbImage, getContext());
holder.setUserOnline(userOnline);
holder.mView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
CharSequence options[] = new CharSequence[]{"Open profile", "Send message"};
AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setTitle("Select Options");
builder.setItems(options, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if (which == 0) {
Intent intent = new Intent(getContext(), ProfileActivity.class);
intent.putExtra("userID", listUID);
startActivity(intent);
}
if (which == 1) {
Intent intent = new Intent(getContext(), ChatActivity.class);
intent.putExtra("userID", listUID);
intent.putExtra("userName", userName);
startActivity(intent);
}
}
});
builder.show();
}
});
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
#NonNull
#Override
public FriendsViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.users_single_layout, parent, false);
return new FriendsViewHolder(view);
}
};
FriendRecyclerView.setAdapter(FriendsRecyclerViewAdapter);
FriendsRecyclerViewAdapter.startListening();
}
public static class FriendsViewHolder extends RecyclerView.ViewHolder {
View mView;
public FriendsViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setDate(String date) {
TextView userStatusView = mView.findViewById(R.id.userStatus);
userStatusView.setText(date);
}
public void setName(String name) {
TextView userNameView = mView.findViewById(R.id.userName);
userNameView.setText(name);
}
public void setThumbImage(String thumbImage, Context context) {
CircleImageView circleImageView = mView.findViewById(R.id.userImage);
Picasso.get().load(thumbImage).placeholder(R.drawable.defaultimage)
.into(circleImageView);
}
public void setUserOnline(String online) {
ImageView userOnline = mView.findViewById(R.id.online);
if (online.equals("true")) {
userOnline.setVisibility(View.VISIBLE);
} else {
userOnline.setVisibility(View.INVISIBLE);
}
}
}
}
Update
I know this is weird bug. But basically when I open my app and in app firends tab (which is FriendsFragment.java), it is showing blank. So I tried to debug that is there any mistake on my code or not? But I didn't find. But while debugging time, when I go to my firends tab in my mobile app, and put any log statement in Android Studio (because when I add/remove something so Android Studio will understand that some changes made happen, and then I run Instant run(not normal run) then FriendFragment will reflect and it shows the user list.
And I have to do this every time, (means I have to add something/remove something, that consider changes for Android Studio) then only FriendsFragment will show the users list. And even if I not open my Friends tab, but open something else in app and than run (instant run) that is also not work! Only when I just go to friends tab (that time it is showing blank, but that is okay) and run Instant run, then only it will reflect.
fragment_friends.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".FriendsFragment">
<android.support.v7.widget.RecyclerView
android:id="#+id/FriendRecyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
</RelativeLayout>
users_single_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/userImage"
android:layout_width="64dp"
android:layout_height="64dp"
android:layout_marginBottom="15dp"
android:layout_marginLeft="15dp"
android:layout_marginTop="15dp"
android:src="#drawable/defaultimage" />
<TextView
android:id="#+id/userName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignTop="#+id/userImage"
android:layout_marginStart="99dp"
android:text="Display Name"
android:textColor="#000000"
android:textSize="18dp" />
<TextView
android:id="#+id/userStatus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignStart="#+id/userName"
android:layout_below="#+id/userName"
android:text="User default Status"
android:textSize="15dp" />
<ImageView
android:id="#+id/online"
android:layout_width="8dp"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/userName"
android:layout_marginLeft="10dp"
android:layout_toEndOf="#+id/userName"
android:visibility="invisible"
android:src="#drawable/online" />
</RelativeLayout>
Another Fragment ChatFragment, which is similar to this and working pretty fine).
ChatFragment.java
package com.jimmytrivedi.lapitchat;
import android.content.Context;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
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.widget.ImageView;
import android.widget.TextView;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.ChildEventListener;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;
import com.squareup.picasso.Picasso;
import de.hdodenhof.circleimageview.CircleImageView;
public class ChatFragment extends Fragment {
private RecyclerView ConversationList;
private DatabaseReference ConversationRef, MessageRef, UserRef;
private FirebaseAuth mAuth;
private String currentUID;
private View MainView;
public ChatFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
MainView = inflater.inflate(R.layout.fragment_chat, container, false);
ConversationList = MainView.findViewById(R.id.ConversationList);
mAuth = FirebaseAuth.getInstance();
currentUID = mAuth.getCurrentUser().getUid();
ConversationRef = FirebaseDatabase.getInstance().getReference().child("Chat").child(currentUID);
ConversationRef.keepSynced(true);
UserRef = FirebaseDatabase.getInstance().getReference().child("Users");
UserRef.keepSynced(true);
MessageRef = FirebaseDatabase.getInstance().getReference().child("Messages").child(currentUID);
LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
layoutManager.setReverseLayout(true);
layoutManager.setStackFromEnd(true);
ConversationList.setHasFixedSize(true);
ConversationList.setLayoutManager(layoutManager);
return MainView;
}
#Override
public void onStart() {
super.onStart();
Query conversationQuery = ConversationRef.orderByChild("timestamp");
Query query = FirebaseDatabase.getInstance()
.getReference()
.child("Chat")
.limitToLast(50);
FirebaseRecyclerOptions<Conversation> options = new FirebaseRecyclerOptions.Builder<Conversation>()
.setQuery(query, Conversation.class)
.build();
FirebaseRecyclerAdapter<Conversation, ConversationViewHolder> ConversationRecyclerViewAdapter = new
FirebaseRecyclerAdapter<Conversation, ConversationViewHolder>(options) {
#Override
protected void onBindViewHolder(#NonNull final ConversationViewHolder holder, int position, #NonNull final Conversation model) {
final String listUID = getRef(position).getKey();
Query lastMessageQuery = MessageRef.child(listUID).limitToLast(1);
lastMessageQuery.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(#NonNull DataSnapshot dataSnapshot, #Nullable String s) {
String data = dataSnapshot.child("message").getValue().toString();
holder.setMassage(data, model.isSeen());
}
#Override
public void onChildChanged(#NonNull DataSnapshot dataSnapshot, #Nullable String s) {
}
#Override
public void onChildRemoved(#NonNull DataSnapshot dataSnapshot) {
}
#Override
public void onChildMoved(#NonNull DataSnapshot dataSnapshot, #Nullable String s) {
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
UserRef.child(listUID).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
final String userName = dataSnapshot.child("Name").getValue().toString();
String userThumb = dataSnapshot.child("thumbImage").getValue().toString();
if (dataSnapshot.hasChild("Online")) {
String userOnline = dataSnapshot.child("Online").getValue().toString();
holder.setUserOnline(userOnline);
}
holder.setName(userName);
holder.setUserImage(userThumb, getContext());
holder.mView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getContext(), ChatActivity.class);
intent.putExtra("userID", listUID);
intent.putExtra("userName", userName);
startActivity(intent);
}
});
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
#NonNull
#Override
public ConversationViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.users_single_layout, parent, false);
return new ConversationViewHolder(view);
}
};
ConversationList.setAdapter(ConversationRecyclerViewAdapter);
ConversationRecyclerViewAdapter.startListening();
}
public static class ConversationViewHolder extends RecyclerView.ViewHolder {
View mView;
public ConversationViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setMassage(String message, boolean isSeen) {
TextView userStatusView = mView.findViewById(R.id.userStatus);
userStatusView.setText(message);
if (!isSeen) {
userStatusView.setTypeface(userStatusView.getTypeface(), Typeface.BOLD);
} else {
userStatusView.setTypeface(userStatusView.getTypeface(), Typeface.NORMAL);
}
}
public void setUserOnline(String online) {
ImageView userOnlineView = mView.findViewById(R.id.online);
if (online.equals("true")) {
userOnlineView.setVisibility(View.VISIBLE);
} else {
userOnlineView.setVisibility(View.INVISIBLE);
}
}
public void setName(String userName) {
TextView userNameView = mView.findViewById(R.id.userName);
userNameView.setText(userName);
}
public void setUserImage(String userThumb, Context context) {
CircleImageView userImageView = mView.findViewById(R.id.userImage);
Picasso.get().load(userThumb).placeholder(R.drawable.defaultimage).into(userImageView);
}
}
}
Friends.java
package com.jimmytrivedi.lapitchat;
public class Friends {
public String date;
public Friends() {
}
public Friends(String date) {
this.date = date;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
}
SectionPagerAdapter.java
package com.jimmytrivedi.lapitchat;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
RequestFragment requestFragment = new RequestFragment();
return requestFragment;
case 1:
ChatFragment chatFragment = new ChatFragment();
return chatFragment;
case 2:
FriendsFragment friendFragment = new FriendsFragment();
return friendFragment;
default:
return null;
}
}
#Override
public int getCount() {
return 3;
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Requests";
case 1:
return "Chats";
case 2:
return "Friends";
default:
return null;
}
}
}
MainActivity.java
package com.jimmytrivedi.lapitchat;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import com.facebook.login.LoginManager;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ServerValue;
public class MainActivity extends AppCompatActivity {
private FirebaseAuth mAuth;
private FirebaseUser currentUser;
private Toolbar toolbar;
private ViewPager viewPager;
private SectionsPagerAdapter sectionsPagerAdapter;
private TabLayout tabLayout;
private DatabaseReference UserDatabaseReference;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
currentUser = mAuth.getCurrentUser();
if (currentUser == null) {
sendTostart();
} else {
UserDatabaseReference = FirebaseDatabase.getInstance().getReference().child("Users").child(mAuth.getCurrentUser().getUid());
UserDatabaseReference.child("Online").setValue("true");
}
viewPager = findViewById(R.id.viewPager);
sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(sectionsPagerAdapter);
toolbar = findViewById(R.id.mainToolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Home");
tabLayout = findViewById(R.id.tabLayout);
tabLayout.setupWithViewPager(viewPager);
}
#Override
protected void onPause() {
super.onPause();
if (currentUser != null) {
UserDatabaseReference.child("Online").setValue(ServerValue.TIMESTAMP);
}
}
private void sendTostart() {
startActivity(new Intent(MainActivity.this, StartActivity.class));
finish();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);
if (item.getItemId() == R.id.logout) {
FirebaseAuth.getInstance().signOut();
LoginManager.getInstance().logOut();
sendTostart();
}
if (item.getItemId() == R.id.settings) {
startActivity(new Intent(MainActivity.this, SettingsActivity.class));
}
if (item.getItemId() == R.id.allUsers) {
startActivity(new Intent(MainActivity.this, UsersActivity.class));
}
return true;
}
}

Use
`viewPager.setOffscreenPageLimit(3);`
after
viewPager.setAdapter(sectionsPagerAdapter);
inside MainActivity.

Use notifyDataSetChanged() after setting adapter to recyclerview.
FriendRecyclerView.setAdapter(FriendsRecyclerViewAdapter);
FriendsRecyclerViewAdapter.notifyDataSetChanged();

How to refresh RecyclerView in one fragment when data changed in another fragment

How do I refresh the data from a local database to RecyclerView when data was successfully submitted? I use the tabs on the application. 2nd-Tab functions to submit the data, and if successful, the data will be stored in localDB.
Data on localDB I will present at the 3rd-Tab.
But what happens, I have to swipe 1st-Tab, then swipe to the 2nd-Tab and then swipe to the new 3rd-Tab data on my localDB successfully displayed.
If the 2nd-Tab me to submit the data, then I swipe to 3rd-Tab, the data will not appear on the list of data.
How do I get the data directly displayed without the need to swipe to the first 1st-Tab and then to the 2nd-Tab and 3rd-Tab ???
MainActivity :
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import com.bertho.gmyl.fragments.EngagedFragment;
import com.bertho.gmyl.fragments.RequestFragment;
import com.bertho.gmyl.fragments.SigninFragment;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private static final String TAG = MainActivity.class.getSimpleName();
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.engine_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFrag(new SigninFragment(), "SIGN-IN");
adapter.addFrag(new EngagedFragment(), "ENGAGED ID");
adapter.addFrag(new RequestFragment(), "LOCATION");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
public void addFrag(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
EngagedFragment (2nd-Tab) Form to save data
import android.os.Bundle;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.bertho.gmyl.R;
import com.bertho.gmyl.model.Engaged;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.bertho.gmyl.realm.RealmHelper;
public class EngagedFragment extends Fragment implements View.OnClickListener {
private static final String TAG = EngagedFragment.class.getSimpleName();
private EditText nama, email, nohp;
private Button btnSaveConnection;
private DatabaseReference mFirebaseDatabase;
private FirebaseDatabase mFirebaseInstance;
private RelativeLayout mRoot;
private View rootView;
private String userId;
private TextView lblNama, lblEmail, lblNohp;
private RelativeLayout relativeLayout;
private RealmHelper realmHelper;
public EngagedFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_engaged, container, false);
realmHelper = new RealmHelper(getActivity());
String appName = getResources().getString(R.string.app_name);
loadLocalDB();
nama = (EditText) rootView.findViewById(R.id.txtName);
email = (EditText) rootView.findViewById(R.id.txtEmail);
nohp = (EditText) rootView.findViewById(R.id.txtNoHp);
lblNama = (TextView) rootView.findViewById(R.id.lblNameval);
lblEmail = (TextView) rootView.findViewById(R.id.lblEmailval);
lblNohp = (TextView) rootView.findViewById(R.id.lblNohpval);
relativeLayout = (RelativeLayout) rootView.findViewById(R.id.panelLabelDetail);
btnSaveConnection = (Button) rootView.findViewById(R.id.btnEngaged);
mFirebaseInstance = FirebaseDatabase.getInstance();
mFirebaseDatabase = mFirebaseInstance.getReference("tbl_engaged");
mFirebaseInstance.getReference("titleapp").setValue(appName);
mFirebaseInstance.getReference("titleapp").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
Log.e(TAG, "TITLE UPDATED FROM FIREBASE");
String appTitle = dataSnapshot.getValue(String.class);
((AppCompatActivity)getActivity()).getSupportActionBar().setTitle(appTitle);
}
#Override
public void onCancelled(DatabaseError error) {
Log.e(TAG, "FAILED TO READ TITLE FROM FIREBASE.", error.toException());
}
});
btnSaveConnection.setOnClickListener(this);
return rootView;
}
private void showSnack(String notify) {
mRoot = (RelativeLayout) rootView.findViewById(R.id.frag_engaged);
Snackbar snackbar = Snackbar.make(mRoot, notify, Snackbar.LENGTH_LONG);
snackbar.show();
}
public void onClick(View v) {
if(v.getId() == R.id.btnEngaged) {
String txtName = nama.getText().toString();
String txtEmail = email.getText().toString();
String txtNo = nohp.getText().toString();
if(txtName.equals("") || txtName.isEmpty()) {
showSnack("Name must filled");
nama.requestFocus();
} else if (txtEmail.equals("") || txtEmail.isEmpty()) {
showSnack("Email must filled");
email.requestFocus();
} else if (txtNo.equals("") || txtNo.isEmpty()) {
showSnack("No.HP must filled");
nohp.requestFocus();
} else {
createUser(txtName, txtEmail, txtNo);
saveToLocalDB(txtName, txtEmail, txtNo);
}
}
}
private void saveToLocalDB(String txtName, String txtEmail, String txtNo) {
realmHelper.addEngaged(txtName, txtEmail, txtNo);
}
private void loadLocalDB() {
realmHelper.getAllData();
}
private void createUser(String name, String email, String nohp) {
userId = mFirebaseDatabase.push().getKey();
Engaged user = new Engaged(name, email, nohp);
mFirebaseDatabase.child(userId).setValue(user);
addUserChangeListener();
}
private void addUserChangeListener() {
mFirebaseDatabase.child(userId).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
Engaged user = dataSnapshot.getValue(Engaged.class);
if (user == null) {
Log.e(TAG, "ENGAGED DATA IS NULL");
return;
}
Log.e(TAG, "ENGAGED DATA IS CHANGED!" + user.name + ", " + user.email);
lblNama.setText(user.name);
lblEmail.setText(user.email);
lblNohp.setText(user.nohp);
//relativeLayout.setVisibility(View.VISIBLE);
nama.setText("");
email.setText("");
nohp.setText("");
}
#Override
public void onCancelled(DatabaseError error) {
// Failed to read value
Log.e(TAG, "FAILED TO READ USER", error.toException());
}
});
}
}
RequestFragment (3rd-Tab) To display localDB
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
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.widget.Toast;
import com.bertho.gmyl.R;
import com.bertho.gmyl.adapter.AdapterEngaged;
import com.bertho.gmyl.model.ModelEngaged;
import com.bertho.gmyl.realm.RealmHelper;
import java.util.ArrayList;
public class RequestFragment extends Fragment {
private static final String TAG = "RequestFragment";
private RecyclerView recyclerView;
private View rootView;
private ArrayList<ModelEngaged> data;
private RealmHelper helper;
public RequestFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.fragment_request, container, false);
data = new ArrayList<>();
helper = new RealmHelper(getActivity());
recyclerView = (RecyclerView) rootView.findViewById(R.id.rvArticle);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
setRecyclerView();
return rootView;
}
public void setRecyclerView() {
try {
data = helper.findAllArticle();
} catch (Exception e) {
e.printStackTrace();
}
AdapterEngaged adapter = new AdapterEngaged(data, new AdapterEngaged.OnItemClickListener() {
#Override
public void onClick(ModelEngaged item) {
Toast.makeText(getContext(), "LIST CLICKED", Toast.LENGTH_LONG).show();
}
});
recyclerView.setAdapter(adapter);
}
#Override
public void onResume() {
super.onResume();
try {
data = helper.findAllArticle();
} catch (Exception e) {
e.printStackTrace();
}
setRecyclerView();
}
}
Everything went smoothly, it's just that I hope the data can be displayed when the form is submitted and can be directly viewed on the 3rd-Tab

Try this,
Create an Interface in EngagedFragment
say,
public interface SubmitListener {
void onSubmit();
}
private SubmitListener onSubmitListener;
public void setSubmitListener(SubmitListener onSubmitListener){
this.onSubmitListener = onSubmitListener;
}
public SubmitListener getOnSubmitListener(){
return onSubmitListener;
}
In saveToLocalDB(...) method
call
onSubmitListener.onSubmit();
In MainActivity:
1) Update the below statement:
public class MainActivity extends AppCompatActivity implements EngagedFragment.SubmitListener
2) Make your ViewPagerAdapter adapter; variable as Global variable;
while adding fragment:
EngagedFragment engagedFrag = new EngagedFragment();
adapter.addFrag(engagedFrag, "ENGAGED ID");
...
viewPager.setAdapter(adapter);
3) add this after setting adapter
engagedFrag.setSubmitListener(this);
4) Override onSubmit() method and try the below code in that method
if(viewPager != null){
if(adapter != null){
Fragment fragment = adapter.getItem(2);
if(fragment != null){
RequestFragment requestFragment = (RequestFragment) fragment;
requestFragment.setRecyclerView();
}
}
}

try this
mViewPager.setOffscreenPageLimit(0);
if that doesnt help, please check below SO question:
fragment refresh On Swip
and about : mViewPager.setOffscreenPageLimit(0); this might not work as i found in one of #commonware 's answer's, the following :-
"Does ViewPager require a minimum of 1 offscreen pages
Yes. If I am reading the source code correctly, you should be getting a warning about this in LogCat, something like:
Requested offscreen page limit 0 too small; defaulting to 1"

Android fragments must be static

I've got this error, but I don't know how to resolve this error.
Error: Fragments should be static such that they can be re-instantiated by the system, and anonymous classes are not static [ValidFragment]
Please help me if you know how to solve
This is the MainActivity.java
import android.annotation.TargetApi;
import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.res.ColorStateList;
import android.content.res.Configuration;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private String keyPref = "test";
private SharedPreferences pref;
private static SharedPreferences.Editor editor;
private static ViewPager view;
private FoodListFragment makanan = new FoodListFragment() {
#Override
public void doRefresh() {
updateData();
}
};
private FoodListFragment minuman = new FoodListFragment() {
#Override
public void doRefresh() {
updateData();
}
};
private FoodListFragment snack = new FoodListFragment() {
#Override
public void doRefresh() {
updateData();
}
};
private Adapter adapter = new Adapter(getSupportFragmentManager());
private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 4343;
private BroadcastReceiver mRegistrationBroadcastReceiver;
private static ProgressDialog loading;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pref = getApplicationContext().getSharedPreferences(keyPref, MODE_PRIVATE);
editor = pref.edit();
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
final ActionBar ab = getSupportActionBar();
ab.setHomeAsUpIndicator(R.drawable.ic_menu);
ab.setDisplayHomeAsUpEnabled(true);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
if (navigationView != null) {
setupDrawerContent(navigationView);
}
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
if (viewPager != null) {
setupViewPager(viewPager);
}
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setBackgroundTintList(ColorStateList.valueOf(Color.rgb(183,28,28)));
fab.setOnClickListener(new View.OnClickListener() {
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
#Override
public void onClick(View view) {
Intent intent = new Intent(getApplicationContext(), CartActivity.class);
MainActivity.this.startActivity(intent);
}
});
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
DBHelper db = new DBHelper(this);
mRegistrationBroadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
//mRegistrationProgressBar.setVisibility(ProgressBar.GONE);
SharedPreferences sharedPreferences =
PreferenceManager.getDefaultSharedPreferences(context);
boolean sentToken = sharedPreferences
.getBoolean(QuickstartPreferences.SENT_TOKEN_TO_SERVER, false);
}
};
loading = new ProgressDialog(this);
loading.setMessage("Loading");
loading.setTitle("Menu");
updateData();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return true;
}
#Override
protected void onPause() {
super.onPause();
LocalBroadcastManager.getInstance(this).unregisterReceiver(mRegistrationBroadcastReceiver);
}
#Override
protected void onResume() {
super.onResume();
LocalBroadcastManager.getInstance(this).registerReceiver(mRegistrationBroadcastReceiver,
new IntentFilter(QuickstartPreferences.REGISTRATION_COMPLETE));
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
mDrawerLayout.openDrawer(GravityCompat.START);
return true;
}
return super.onOptionsItemSelected(item);
}
public void updateData() {
ServerHelper server = new ServerHelper() {
#Override
public void onStart() {
loading.show();
}
#Override
public void onFinish() {
loading.dismiss();
}
#Override
public void onSuccess(int statusCode, String response) {
try {
editor.putString("response", response);
editor.commit();
makanan.clearFood();
minuman.clearFood();
snack.clearFood();
JSONArray foods = new JSONArray(response);
for (int i = 0; i <= foods.length()-1; i++) {
JSONObject object = foods.getJSONObject(i);
JSONObject subs = object.getJSONObject("SubCategory");
FoodCategory addFood = new FoodCategory(subs.getString("name"), subs.getString("photo"));
if (subs.getString("categories_id").contains("1")) {
makanan.addFood(addFood);
} else if (subs.getString("categories_id").contains("2")) {
minuman.addFood(addFood);
} else if (subs.getString("categories_id").contains("3")) {
snack.addFood(addFood);
}
}
makanan.doneRefresh();
minuman.doneRefresh();
snack.doneRefresh();
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(view.getContext(),"Terjadi masalah koneksi, silahkan coba kembali", Toast.LENGTH_LONG).show();
}
loading.dismiss();
}
#Override
public void onFailure(int statusCode, String response) {
if (view != null) {
Snackbar.make(view, "Terjadi Masalah Koneksi", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
} else {
Toast.makeText(MainActivity.this,"Terjadi Masalah Koneksi", Toast.LENGTH_LONG).show();
}
makanan.doneRefresh();
minuman.doneRefresh();
snack.doneRefresh();
loading.dismiss();
}
};
server.getAllSubs();
}
private void setupViewPager(ViewPager viewPager) {
makanan.setRetainInstance(true);
minuman.setRetainInstance(true);
snack.setRetainInstance(true);
adapter.addFragment(makanan, "Makanan");
adapter.addFragment(minuman, "Minuman");
adapter.addFragment(snack, "Snack");
viewPager.setAdapter(adapter);
updateData();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
private void setupDrawerContent(final NavigationView navigationView) {
View header = navigationView.getHeaderView(0);
TextView username = (TextView) header.findViewById(R.id.main_username);
DBHelper db = new DBHelper(this);
username.setText(db.getUsers().getName());
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.nav_home: {
menuItem.setChecked(true);
break;
}
case R.id.nav_order: {
navigationView.getMenu().getItem(0).setChecked(true);
Intent order = new Intent(MainActivity.this, OrderActivity.class);
startActivity(order);
break;
}
case R.id.nav_cart: {
navigationView.getMenu().getItem(0).setChecked(true);
Intent cart = new Intent(MainActivity.this, CartActivity.class);
startActivity(cart);
break;
}
case R.id.nav_logout: {
AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.this);
dialog.setMessage("Anda yakin ingin logout akun anda ?");
dialog.setNegativeButton("Batal",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
dialog.setPositiveButton("Keluar",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
DBHelper logout = new DBHelper(MainActivity.this);
logout.clearSPConfig();
LocalBroadcastManager.getInstance(MainActivity.this).unregisterReceiver(mRegistrationBroadcastReceiver);
Intent goLogin = new Intent(MainActivity.this, LoginMainActivity.class);
startActivity(goLogin);
}
});
AlertDialog alertDialog = dialog.create();
alertDialog.show();
}
}
mDrawerLayout.closeDrawers();
return true;
}
});
}
public static class Adapter extends FragmentPagerAdapter {
private final List<Fragment> mFragments = new ArrayList<>();
private final List<String> mFragmentTitles = new ArrayList<>();
public Adapter(FragmentManager fm) {
super(fm);
}
public void addFragment(Fragment fragment, String title) {
mFragments.add(fragment);
mFragmentTitles.add(title);
}
#Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
#Override
public int getCount() {
return mFragments.size();
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitles.get(position);
}
}
}
and this is the fragment class FoodListFragment.java
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.annotation.UiThread;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.InflateException;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public abstract class FoodListFragment extends Fragment {
private ArrayList<FoodCategory> foodList = new ArrayList<FoodCategory>();
private RecyclerView rv;
private RecyclerViewAdapter adapter;
private SwipeRefreshLayout swipeLayout;
private View view;
FoodListFragment() {
}
public void addFoods(ArrayList<FoodCategory> food) {
foodList = food;
if (adapter != null) {
adapter.notifyDataSetChanged();
}
}
public void addFood(FoodCategory food) {
foodList.add(food);
if (adapter != null) {
adapter.notifyDataSetChanged();
}
}
public void clearFood() {
foodList.clear();
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// final RecyclerView rv = (RecyclerView) inflater.inflate(R.layout.fragment_food_list, container, false);
view = inflater.inflate(R.layout.fragment_food_list, null);
swipeLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_container);
swipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
doRefresh();
}
});
swipeLayout.setColorSchemeColors(Color.RED, Color.GRAY);
RecyclerView rv = (RecyclerView) view.findViewById(R.id.recyclerview);
setupRecyclerView(rv);
return view;
}
private void setupRecyclerView(final RecyclerView recyclerView) {
//recyclerView.setLayoutManager(new LinearLayoutManager(recyclerView.getContext()));
recyclerView.setLayoutManager(new GridLayoutManager(recyclerView.getContext(), 2));
recyclerView.setHasFixedSize(true);
setRetainInstance(true);
adapter = new RecyclerViewAdapter(getActivity(),foodList);
recyclerView.setAdapter(adapter);
}
public void doneRefresh(){
if (swipeLayout != null) {
swipeLayout.setRefreshing(false);
}
}
public abstract void doRefresh();
}

You are declaring your Fragment as abstract class. Abstract class can't be instantiated. It can be used only as a base class. The way you are trying to use it (anonymous class) is not possible in Android framework. A Fragment class must be a subclass of Fragment (or an existing subclass of it) and concrete.
Remove abstract keyword
public class FoodListFragment extends Fragment {
Things your are trying to achieve with
public abstract void doRefresh();
should be done using an interface.

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.

Develop Reference

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

ThreeFragment should reload 1 times to show the RecyclerView,Asynchronus task - java

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