How to make a navbar in a fragment android studio

How to make a navbar in a fragment android studio - java

I was running into some trouble making a navbar in a fragment that was loaded by a different navbar.
Basically trying to solve the problem of having a menu in a fragment that was accessed by a navbar.
The easiest thing turned out to be creating a tablayout in the fragment. Here's the tutorial I followed: https://www.youtube.com/watch?v=pIKdHeOjYNw
Here's the basic code:
Main Fragment
public class HomeFragment extends Fragment {
private FragmentHomeBinding binding;
public View onCreateView(#NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
binding = FragmentHomeBinding.inflate(inflater, container, false);
View root = binding.getRoot();
TabLayout tabLayout = root.findViewById(R.id.tabLayout);
ViewPager2 viewPager2 = root.findViewById(R.id.viewPagerHomeScreen);
ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(this);
viewPager2.setAdapter(viewPagerAdapter);
tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager2.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return root;
}
#Override
public void onDestroyView() {
super.onDestroyView();
binding = null;
}
private class ViewPagerAdapter extends FragmentStateAdapter {
public ViewPagerAdapter(#NonNull Fragment fragment) {
super(fragment);
}
#NonNull
#Override
public Fragment createFragment(int position) {
switch (position){
case 0 :
return new HomeScreenMembership();
case 1 :
return new HomeScreenCreatedClubs();
default :
return new HomeScreenMembership();
}
}
#Override
public int getItemCount() {
return 2;
}
}
Main Fragment XMl
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".ui.home.HomeFragment">
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<com.google.android.material.tabs.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/membership_tab" />
<com.google.android.material.tabs.TabItem
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/created_clubs_tab" />
</com.google.android.material.tabs.TabLayout>
<androidx.viewpager2.widget.ViewPager2
android:id="#+id/viewPagerHomeScreen"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="#+id/tabLayout" />
</androidx.constraintlayout.widget.ConstraintLayout>
One of the Fragments For One Of the Tabs
(the rest were almost identical)
package com.freedommuskrats.clubbub.ui.home;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.freedommuskrats.clubbub.R;
public class HomeScreenCreatedClubs extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_home_screen_created_clubs, container, false);
}
}
XML for that fragment
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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=".ui.home.HomeScreenCreatedClubs">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Created" />
</FrameLayout>

This worked well and I'm even thinking of ditching the navbar in the future because it was so much more complex.

Related

How to use Tabbed navigation layout inside a fragment

I want to put tabbed layout inside a fragment layout, i have tried many methods but none of them worked.
Things to be noted first are I am already having a navigation drawer with 4 fragments and I want to apply tabbed layout to one of its fragment not All.
This is my JAVA code of the fragment on which i want to use Tabbed layout ,i am using android studio v3.3
package com.androidapp.kjsscapp;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {#link Fragment} subclass.
*/
public class NoticeBoard extends Fragment {
public NoticeBoard() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_notice_board, container, false);
TabLayout tabLayout = v.findViewById(R.id.NoticeBoard_Tab);
final ViewPager viewPager = v.findViewById(R.id.Mpager1);
tabpageAdapter tabpageAdapter = new tabpageAdapter(getChildFragmentManager(),tabLayout.getTabCount());
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) {
}
});
return v;
}
}
The currosponding xml file
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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"
tools:context=".NoticeBoard">
<android.support.design.widget.TabLayout
android:id="#+id/NoticeBoard_Tab"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAlignment="center"
android:visibility="visible"
app:tabBackground="#color/colorPrimary"
app:tabIndicatorColor="#android:color/holo_blue_dark"
app:tabTextColor="#color/White">
<android.support.design.widget.TabItem
android:id="#+id/TabItem_general"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="General" />
<android.support.design.widget.TabItem
android:id="#+id/TabItem_admissions"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Admissions" />
<android.support.design.widget.TabItem
android:id="#+id/TabItem_scholarship"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Scholarships" />
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="#+id/Mpager1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#id/NoticeBoard_Tab" />
</RelativeLayout>
The tab controller:
package com.androidapp.kjsscapp;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
public class tabpageAdapter extends FragmentStatePagerAdapter {
int countTab;
public tabpageAdapter(FragmentManager fm, int tabCount) {
super(fm);
this.countTab = countTab;
}
#Override
public Fragment getItem(int i) {
Tab_General gen = new Tab_General();
Tab_Admissions add = new Tab_Admissions();
Tab_ScholarShip sch = new Tab_ScholarShip();
switch (i){
case 0:
return gen;
case 1:
return add;
case 2:
return sch;
default:
return gen;
}
}
#Override
public int getCount() {
return countTab;
}
}
I expect to view the fragments of tablayout inside the fragment of drawer layout as soon as the fragment of drawer is called. Kindly provide the solution if any

how to implement recyclerView that connect to firebase database in a tabbed activity?

I would like to know how to implement a tabbed activity( 4 fragments) with recycler and cardview that connect to a firebase DB to pull data.
-Do I have to create an adapter for each fragment or same adapter but each fragment will filter what data it requires?
-Do I have to call getInstance and reference Firebase DB from main Activity?
I'm completely new to recyclerView, please give me every possible details.
-For the cardview, an object will be created called "property", 2 textview and 1 imageview. How this will fit into the whole code, I mean the property class and its instance.
-Can I store the image that will be used in the cardview on Firebase Storage? If so how to query them?
Here's the code
package com.realty.drake.kunuk;
import android.support.design.widget.TabLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
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.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
public class MainActivity extends AppCompatActivity {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
Log.d("debugg", "OnCreate started");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
mViewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.addOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(mViewPager));
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
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();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Log.d("DEBUGG","getItem called" );
//Returning the current tab
switch (position) {
case 0:
Tab1Buy tab1 = new Tab1Buy();
return tab1;
case 1:
Tab2Rent tab2 = new Tab2Rent();
return tab2;
case 2:
Tab3Lot tab3 = new Tab3Lot();
return tab3;
case 3:
Tab4Saved tab4 = new Tab4Saved();
return tab4;
default:
return null;
}
}
#Override
public int getCount() {
// Show 4 total pages.
return 4;
}
#Override
public CharSequence getPageTitle(int position){
Log.d("Debugg", "getPageTitle: Executed");
switch (position) {
case 0:
return "BUY";
case 1:
return "RENT";
case 2:
return "LOT";
case 3:
return "SAVED";
}
return null;
}
}
}
package com.realty.drake.kunuk;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by drake on 4/11/18.
*/
public class Tab1Buy extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tab1buy, container, false);
return rootView;
}
}
package com.realty.drake.kunuk;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by drake on 4/11/18.
*/
public class Tab2Rent extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.tab2rent, container, false);
return rootView;
}
}
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.realty.drake.kunuk.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/appbar_padding_top"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_weight="1"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/AppTheme.PopupOverlay"
app:title="#string/app_name">
</android.support.v7.widget.Toolbar>
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMaxWidth="0dp"
app:tabGravity="fill"
app:tabMode="fixed">
<android.support.design.widget.TabItem
android:id="#+id/tabItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tab_text_1" />
<android.support.design.widget.TabItem
android:id="#+id/tabItem2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tab_text_2" />
<android.support.design.widget.TabItem
android:id="#+id/tabItem3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/tab_text_3" />
</android.support.design.widget.TabLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="#dimen/fab_margin"
app:srcCompat="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#dfdfdf"
android:orientation="vertical">
<!-- TODO Add white icon -->
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/tools"
android:id="#+id/property"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:cardUseCompatPadding="true"
card_view:cardCornerRadius="4dp"
card_view:cardElevation="4dp">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="290dp"
android:orientation="vertical">
<ImageView
android:id="#+id/post_image"
android:contentDescription="#string/property"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="71dp"
android:scaleType="centerCrop"
android:src="#drawable/house1"
app:layout_constraintBottom_toTopOf="#+id/number_bedroom"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/post_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginStart="5dp"
android:layout_marginTop="8dp"
android:text="55,000$"
android:textColor="#color/colorPrimary"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.79" />
<TextView
android:id="#+id/post_desc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginStart="5dp"
android:layout_marginTop="1dp"
android:text="23,Rue Duvivier-hall, Les Cayes, "
android:textColor="#737373"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/post_title"
app:layout_constraintVertical_bias="0.0" />
<ImageView
android:id="#+id/bathroom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginStart="100dp"
android:layout_marginTop="2dp"
android:background="#ff9100"
android:src="#drawable/bathtub"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.976" />
<ImageView
android:id="#+id/bedroom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginStart="25dp"
android:layout_marginTop="2dp"
android:background="#ff9100"
android:src="#drawable/bedroom"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.976" />
<TextView
android:id="#+id/number_bathroom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:text="2"
android:textColor="#ff9100"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="#+id/bathroom"
app:layout_constraintEnd_toStartOf="#+id/bathroom" />
<TextView
android:id="#+id/number_bedroom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:text="3"
android:textColor="#ff9100"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="#+id/bedroom"
app:layout_constraintEnd_toStartOf="#+id/bedroom" />
<TextView
android:id="#+id/number_garage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:text="1"
android:textColor="#ff9100"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="#+id/garage"
app:layout_constraintEnd_toStartOf="#+id/garage" />
<ImageView
android:id="#+id/garage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginStart="175dp"
android:layout_marginTop="2dp"
android:background="#ff9100"
android:src="#drawable/garage"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.976" />
</android.support.constraint.ConstraintLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<!--TODO add recyclerView layout-->
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/rv_items">
</android.support.v7.widget.RecyclerView>
</FrameLayout>
Thanks for your help

-Do I have to create an adapter for each fragment or same adapter but each fragment will filter what data it requires?
A: I have each fragment get their own reference to the firebase database, each one querying a child. In the firebase database, look at image, each Fragment call one child: Buy, Lot, Rent..
-Do I have to call getInstance and reference Firebase DB from main Activity? I'm completely new to recyclerView, please give me every possible details.
A: I call the getIntance in each fragment instead,
public class Tab1Buy extends Fragment {
private DatabaseReference propertyRef;
private RecyclerView mPropertyRecyclerView;
FirebaseRecyclerAdapter<Property, PropertyViewHolder> mPropertyAdapter;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.property_tab, container, false);
mPropertyRecyclerView = rootView.findViewById(R.id.property_recyclerView);
return rootView;
}
//TODO Check internet and display error msg if internet down
#Override
public void onViewCreated(final View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mPropertyRecyclerView.hasFixedSize();
mPropertyRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
final ProgressBar progressBar = view.findViewById(R.id.progressBar);
progressBar.setVisibility(View.VISIBLE);
propertyRef = FirebaseDatabase.getInstance()
.getReference()
.child("Buy");
propertyRef.keepSynced(true);
// keyQuery - the Firebase location containing the list of keys to be found in dataRef
//Query personQuery = propertyRef.orderByKey();
FirebaseRecyclerOptions<Property> options =
new FirebaseRecyclerOptions.Builder<Property>()
.setQuery(propertyRef, Property.class)
.build();
mPropertyAdapter = new FirebaseRecyclerAdapter<Property, PropertyViewHolder>(options) {
#Override
// Bind the Property object to the ViewHolder PropertyHolder
public void onBindViewHolder(#NonNull PropertyViewHolder holder,
final int position, #NonNull final Property model) {
holder.setPrice(model.getPrice());
holder.setAddress(model.getAddress());
holder.setNumberOfBed(model.getNumberOfBed());
holder.setNumberOfBath(model.getNumberOfBath());
holder.setNumberOfCar(model.getNumberOfCar());
holder.setPropertyImage(model.getPropertyImage());
//This Intent send Parcelable from Property to PropertyDetail
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
getActivity().startActivity(new Intent(getActivity(), PropertyDetail.class)
.putExtra("Property", model));
}
});
}
#Override
public PropertyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
// Create a new instance of the ViewHolder, in this case we are using a custom
// layout called R.layout.property_card for each item
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.property_card, parent, false);
return new PropertyViewHolder(view);
}
#Override
public void onDataChanged() {
// Called each time there is a new data snapshot. You may want to use this method
// to hide a loading spinner or check for the "no documents" state and update your UI.
// ...
progressBar.setVisibility(View.GONE);
}
//TODO Implement onError
#Override
public void onError(#NonNull DatabaseError e) {
// Called when there is an error getting data. You may want to update
// your UI to display an error message to the user.
// ...
progressBar.setVisibility(View.GONE);
Toast.makeText(getActivity(), "DatabaseError", Toast.LENGTH_SHORT).show();
}
};
mPropertyRecyclerView.setAdapter(mPropertyAdapter);
}
#Override
public void onStart() {
super.onStart();
mPropertyAdapter.startListening();
}
#Override
public void onStop() {
super.onStop();
mPropertyAdapter.stopListening();
}
public class PropertyViewHolder extends RecyclerView.ViewHolder {
View mView;
public PropertyViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setPrice(int price) {
String currencyPrice = NumberFormat //Format the price variable in currency form
.getCurrencyInstance(Locale.US)
.format(price);
TextView Price = mView.findViewById(R.id.post_price);
Price.setText(currencyPrice);
}
public void setAddress(String address){
TextView Address = mView.findViewById(R.id.post_address);
Address.setText(String.valueOf(address));
}
public void setNumberOfBed(int numberOfBed){
TextView NumberOfBed = mView.findViewById(R.id.post_bedroom);
NumberOfBed.setText(String.valueOf(numberOfBed));
}
public void setNumberOfBath(int numberOfBath){
TextView NumberOfBath = mView.findViewById(R.id.post_bathroom);
NumberOfBath.setText(String.valueOf(numberOfBath));
}
public void setNumberOfCar(int numberOfCar) {
TextView NumberOfCar = mView.findViewById(R.id.post_garage);
NumberOfCar.setText(String.valueOf(numberOfCar));
}
public void setPropertyImage(String propertyImage){
ImageView imageView = mView.findViewById(R.id.post_propertyImage);
//take one long string containing multiple url in and parse it
String propertyImageArray[] = propertyImage.split(",");
//Loading circle for placeholder, ColorAccent has been used
CircularProgressDrawable progressDrawable =
new CircularProgressDrawable(getContext());
progressDrawable.setStrokeWidth(5f);
progressDrawable.setCenterRadius(30f);
progressDrawable.setColorSchemeColors(Color.argb(1,255,145,0));
progressDrawable.start();
// Download directly from StorageReference using Glide
// (See MyAppGlideModule for Loader registration)
GlideApp.with(getContext())
.load(propertyImageArray[0])
.placeholder(progressDrawable)
.fitCenter()
.into(imageView);
}
}
}
-For the cardview, an object will be created called "property", 2 textview and 1 imageview. How this will fit into the whole code, I mean the property class and its instance.
A: Create a new instance of the ViewHolder, in this case we are using a custom layout called R.layout.property_card for each item. Look at the code above, specifically at that line public PropertyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
-Can I store the image that will be used in the cardview on Firebase Storage? If so how to query them?
A: yes I stored image in Firebase Storage,then I use their generated url to pass in Glide method. look at the code above.
I only show for the first fragment because they all look similar, except the child reference in the firebase differ.

How can I add a ViewPager to a Navigation Drawer Item in Android application?

I want to add a viewPager for main fragment in my android app.
This is the xml file for main fragment
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
This is the Java code for Main Fragment
public class MainFragment extends ListFragment {
private static final String TAG = MainFragment.class.getSimpleName();
private StudentsDBHandler studentsDBHandler;
public MainFragment() {
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
studentsDBHandler = new StudentsDBHandler(getActivity());
View rootView = inflater.inflate(R.layout.main_fragment, container, false);
displayStudents();
return rootView;
}
private void displayStudents() {
List<Student> studentList = studentsDBHandler.getAll();
ArrayAdapter<Student> list = new ArrayAdapter<>(getActivity(), R.layout.item_student, studentList);
setListAdapter(list);
}
}

You have a DrawerLayout page. It's about your drawer contains.
İn the DrawerLayout XML
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
add this code below
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
write this code and setup your View pager like example
viewPager=(ViewPager)findViewById(R.id.viewPager);
FragmentManager fm=getSupportFragmentManager();
viewPager.setAdapter(new MyAdapter(fm));
}
class MyAdapter extends FragmentPagerAdapter{
public MyAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
if(position==0)
fragment= new Home1();
if(position==1)
fragment=new Home2();
return fragment;
}
#Override
public int getCount() {
return 2;
}
}
}
I hope Help you

android - findViewById NULL under using Fragment

I do not speak English well. So a lot of it is awkward. Also, I wish me to understand, so I used the google translator.
I had the source code from the Null Pointer Error.
how can I it fix?
First It's Xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="${relativePackage}.${activityClass}" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ToggleButton
android:id="#+id/toggleButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.50"
android:text="ToggleButton" />
<ToggleButton
android:id="#+id/toggleButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.50"
android:text="ToggleButton" />
</LinearLayout>
<android.support.v4.view.ViewPager
android:id="#+id/pager2"
android:layout_width="wrap_content"
android:layout_height="match_parent" />
</LinearLayout>
It's java File
package ui.tab;
import android.os.Bundle;
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.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import com.kdevproject.game.mining.R;
public class Tab2Activity extends Fragment{
// newInstance constructor for creating fragment with arguments
public static Tab2Activity newInstance() {
Tab2Activity tab2Activity = new Tab2Activity();
return tab2Activity;
}
// Store instance variables based on arguments passed
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
// Inflate the view for the fragment based on layout XML
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_tab2, container, false);
if (container == null) {
return null;
}
ViewPager mViewPager = (ViewPager) getView().findViewById(R.id.pager2);
return view;
}
}
class MyPagerAdapter extends FragmentPagerAdapter {
private static int NUM_ITEMS = 6;
public MyPagerAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
// Returns total number of pages
#Override
public int getCount() {
return NUM_ITEMS;
}
// Returns the fragment to display for that page
#Override
public Fragment getItem(int position) {
switch (position) {
case 0: // Fragment # 0 - This will show FirstFragment
return Tab2_1Activity.newInstance();
case 1:
return Tab2_1Activity.newInstance();
}
return null;
}
// Returns the page title for the top indicator
#Override
public CharSequence getPageTitle(int position) {
return "Page " + position;
}
}

Use view instead of getView() in onCreateView to initialize ViewPager :
ViewPager mViewPager = (ViewPager)view.findViewById(R.id.pager2);

Fragments don't work in app

I have question, because I do not know what is wrong. Does not display the activity of activity_main_fragment.xml me and I do not know why. Do you have any suggestions what to change?
I created two fragments fragment_a and fragment_b and I want to display them connected to the fragment_a when you click on an item in a listview information came to me in fragment_b.
Communicator.java
public interface Communicator {
public void respond(int i);
}
strings.xml
<string-array name="titles">
<item>Zmiany</item>
<item>Ilę</item>
<item>Trudne pytania</item>
</string-array>
<string-array name="descriptions">
<item>Zmianysadas</item>
<item>Ilęvcxcvcx</item>
<item>Trudne pytaxcvcxvxcnia</item>
</string-array>
fragment_a.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#FFBB00" >
<ListView
android:id="#+id/listView22"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
fragment_b.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:orientation="vertical"
android:layout_height="fill_parent"
android:background="#99CC00">
<TextView
android:id="#+id/textView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
activity_main_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/my_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<fragment
android:id="#+id/fragment1"
android:name="com.odpad.odpadygdansk.FragmentA"
android:layout_width="150dp"
android:layout_height="match_parent" />
<fragment
android:id="#+id/fragment2"
android:name="com.odpad.odpadygdansk.FragmentB"
android:layout_width="470dp"
android:layout_height="match_parent" />
</LinearLayout>
FragmentA.java
public class FragmentA extends Fragment implements AdapterView.OnItemClickListener{
ListView list;
Communicator communicator;
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
communicator = (Communicator) getActivity();
list = (ListView) getActivity().findViewById(R.id.listView22);
ArrayAdapter adapter = ArrayAdapter.createFromResource(getActivity(), R.array.titles, android.R.layout.simple_list_item_1);
list.setAdapter(adapter);
list.setOnItemClickListener(this);
return inflater.inflate(
R.layout.fragment_a, container, false);
}
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l){
communicator.respond(i);
}
}
FragmentB.java
public class FragmentB extends Fragment{
TextView text;
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
text = (TextView) getActivity().findViewById(R.id.textView);
return inflater.inflate(
R.layout.fragment_b, container, false);
}
public void changeData(int i)
{
Resources res = getResources();
String[] descriptions = res.getStringArray(R.array.descriptions);
text.setText(descriptions[i]);
}
}
EcologicalInformationActivity.java
public class EcologicalInformationActivity extends FragmentActivity implements Communicator{
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_fragment);
}
#Override
public void respond(int i){
FragmentManager manager = getFragmentManager();
FragmentB f2 = (FragmentB) manager.findFragmentById(R.id.fragment2);
f2.changeData(i);
}
}

EcologicalInformationActivity extends FragmentActivity so you should call getSupportFragmentManager() in place of getFragmentManager(). See documentation here. If your fragments are not already instances of the support library version, you'll need to change that too.

Develop Reference

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

How to make a navbar in a fragment android studio - java

This worked well and I'm even thinking of ditching the navbar in the future because it was so much more complex.

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How can I add a ViewPager to a Navigation Drawer Item in Android application?

android - findViewById NULL under using Fragment

Fragments don't work in app

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