I'm developing an android app using java and Firebase. In that I'm using a recycler view to display the images and other contents which are stored in Firebase database. When I run the program the other contents are displaying correctly but the image is not showing. This is my first time developing an android application so I'm confused.
Any help you can provide me to get this to work would be great.
Here is my code,
Adapter class
public class MessageAdapter extends RecyclerView.Adapter<MessageAdapter.MyMessageHolder> {
private StorageReference storage;
private Context context;
private ArrayList<profile> Messages;
public MessageAdapter(Context c , ArrayList<profile> p)
{
context = c;
Messages =p;
}
#NonNull
#Override
public MyMessageHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
return new MyMessageHolder(LayoutInflater.from(context).inflate(R.layout.activity_card_view,parent,false));
}
#Override
public void onBindViewHolder(#NonNull MyMessageHolder holder, int position) {
profile prof = Messages.get(position);
holder.name.setText(Messages.get(position).getTitle());
holder.description.setText(Messages.get(position).getDescription());
holder.date.setText(Messages.get(position).getDate());
//Picasso.get().load(Messages.get(position).getImage()).into(holder.image);
Picasso.get()
.load(prof.getImage())
.fit()
.centerCrop()
.into(holder.image);
}
#Override
public int getItemCount() {
return Messages.size();
}
class MyMessageHolder extends RecyclerView.ViewHolder
{
TextView name,description,date,time;
ImageView image;
public MyMessageHolder(#NonNull View itemView) {
super(itemView);
name = itemView.findViewById(R.id.hTitle);
description = itemView.findViewById(R.id.hDescription);
date = itemView.findViewById(R.id.hDate);
time = itemView.findViewById(R.id.hTime);
image = itemView.findViewById(R.id.hImage);
}
}
}
Main activity class
class MainActivityHomePage extends AppCompatActivity {
private DatabaseReference reference;
RecyclerView recyclerView;
ArrayList<profile> list;
MessageAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_page);
recyclerView = findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
list = new ArrayList<>();
reference = FirebaseDatabase.getInstance().getReference().child("Messages");
reference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot dataSnapshot1: dataSnapshot.getChildren()){
profile p = dataSnapshot1.getValue(profile.class);
list.add(p);
}
adapter = new MessageAdapter( MainActivityHomePage.this,list);
recyclerView.setAdapter(adapter);
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
Toast.makeText(MainActivityHomePage.this, "something wrong", Toast.LENGTH_SHORT).show();
}
});
}
}
Model class
package com.eNotification.getnotify;
public class profile {
private String title;
private String description;
private String date;
private String image;
public profile() {
}
public profile(String title, String description, String date, String image) {
this.title = title;
this.description = description;
this.date = date;
this.image = image;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}
card view layout xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
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="170dp"
app:cardBackgroundColor="#android:color/white"
android:layout_marginTop="10dp"
app:cardCornerRadius="8dp"
app:cardElevation="2dp"
app:cardPreventCornerOverlap="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/silver"
android:padding="5dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="260dp"
android:layout_height="match_parent"
android:padding="5dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/hTitle"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_marginTop="8dp"
android:background="#color/lightSilver"
android:hint="Title"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/hTime" />
<TextView
android:id="#+id/hDescription"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginTop="8dp"
android:background="#color/lightSilver"
android:text="Description"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/hTitle" />
<TextView
android:id="#+id/hDate"
android:layout_width="136dp"
android:layout_height="30dp"
android:layout_marginEnd="4dp"
android:background="#color/lightSilver"
android:text="Date"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#id/hTime"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/hTime"
android:layout_width="116dp"
android:layout_height="30dp"
android:layout_marginStart="4dp"
android:background="#color/lightSilver"
android:text="Time"
app:layout_constraintStart_toEndOf="#id/hDate"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<ImageView
android:id="#+id/hImage"
android:layout_width="160dp"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.834" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
Recycler view xml
<?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:padding="8dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
Related
I am making an app that let users create meetings and I would like the details of the meeting (eg name, type, location) in a recycler view.I ran the php code by itself and was able to get the values from the database.
Currently, I am getting an error of
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at in recyclerviewAdapter
holder.Name.setText(users.getName());
holder.Type.setText(users.getType());
holder.Location.setText(users.getLocation());
which is linked to
public class Users {
private String name,type,location;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
}
recyclerviewAdapter
public class UserAdapter extends RecyclerView.Adapter<UserAdapter.UserHolder>{
Context context;
List<Users> usersList;
public UserAdapter(Context context, List<Users> usersList) {
this.context = context;
this.usersList = usersList;
}
#NonNull
#Override
public UserHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View userLayout= LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_main2,parent,false);
return new UserHolder(userLayout);
}
#Override
public void onBindViewHolder(#NonNull UserHolder holder, int position) {
Users users=usersList.get(position);
holder.Name.setText(users.getName());
holder.Type.setText(users.getType());
holder.Location.setText(users.getLocation());
}
#Override
public int getItemCount() {
return usersList.size();
}
public class UserHolder extends RecyclerView.ViewHolder{
TextView Name,Type,Location;
public UserHolder(#NonNull View itemView){
super(itemView);
Name=itemView.findViewById(R.id.textTitle);
Type=itemView.findViewById(R.id.textType);
Location=itemView.findViewById(R.id.textLocation);
}
}
}
main activity code
public class MainActivity2 extends AppCompatActivity {
private static final String URL = "http://10.0.2.2/mad/activitydisplay.php";
RecyclerView recyclerView;
UserAdapter userAdapter;
List<Users> usersList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
recyclerView = findViewById(R.id.recylcerList);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
usersList=new ArrayList<>();
LoadAllUser();
}
private void LoadAllUser() {
JsonArrayRequest request =new JsonArrayRequest(URL, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray array) {
for (int i=0;i<array.length();i++){
try {
JSONObject object=array.getJSONObject(i);
String name=object.getString("eventname").trim();
String type=object.getString("type").trim();
String location=object.getString("location").trim();
Users user= new Users();
user.setName(name);
user.setType(type);
user.setLocation(location);
usersList.add(user);
} catch (JSONException e) {
e.printStackTrace();
}
}
userAdapter=new UserAdapter(MainActivity2.this,usersList);
recyclerView.setAdapter(userAdapter);
}
},new Response.ErrorListener(){
#Override
public void onErrorResponse(VolleyError error){
Toast.makeText(MainActivity2.this, error.toString(), Toast.LENGTH_SHORT).show();
}
});
RequestQueue requestQueue=Volley.newRequestQueue(MainActivity2.this);
requestQueue.add((request));
}
}
php code to get data from table
$sql="SELECT * FROM `activitytable` ";
$result=mysqli_query($conn,$sql);
$user=array();
while($row = mysqli_fetch_assoc($result)){
$index['eventname']=$row['eventname'];
$index['type']=$row['type'];
$index['location']=$row['location'];
array_push($user, $index);
}
echo json_encode($user);
activity_main2.xml
<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
tools:context=".MainActivity2">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recylcerList"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
activity_list resource file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="horizontal" >
<TextView
style="bold"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Title:"
android:textColor="#color/black"
android:textSize="24dp" />
<TextView
android:id="#+id/textTitle"
style="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#color/black"
android:textSize="24dp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="horizontal" >
<TextView
style="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Type:"
android:textColor="#color/black"
android:textSize="24dp" />
<TextView
android:id="#+id/textType"
style="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#color/black"
android:textSize="24dp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:orientation="horizontal" >
<TextView
style="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Location:"
android:textColor="#color/black"
android:textSize="24dp" />
<TextView
android:id="#+id/textLocation"
style="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#color/black"
android:textSize="24dp" />
</LinearLayout>
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
instead of
public UserHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View userLayout= LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_main2,parent,false);
return new UserHolder(userLayout);
}
use this
public UserHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View userLayout= LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_list ,parent,false);
return new UserHolder(userLayout);
}
because activity_main2 doesn't contain R.id.textTitle,R.id.textType,R.id.textLocation
check your xml(R.layout.activity_main2) looks like id of your view are from another layout
After some research on this one of the complex issue
I did this like this for my currency convertor project:
Below are steps:
Created A Custom Adapter with inner ViewHolder
Created an Interference for Selection changed and to notify the
Adaper in MainActivty
Created an Model Class Created an layout for My list
Coding:
Adapter and View Holder
class Adapter extends RecyclerView.Adapter<Adapter.VH> {
ArrayList<Currency> list, checkedCurrencies = new ArrayList<>();
CurrencySelectionChangelistener listener;
public Adapter(#NonNull ArrayList<Currency> list, CurrencySelectionChangelistener listener) {
this.list = list;
this.listener = listener;
}
#NonNull
#Override
public VH onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
return new VH(LayoutInflater.from(getContext()).inflate(R.layout.layout_list_of_all_items, parent, false));
}
#Override
public void onBindViewHolder(#NonNull VH holder, #SuppressLint("RecyclerView") int position) {
Currency currentCurrency = list.get(position);
holder.checkBox.setChecked(currentCurrency.isChecked());
holder.mDis.setText(currentCurrency.getDescription());
//ignore below line it's just for sorting the string to set On TextView and with another purpose
String name = currentCurrency.getName().toLowerCase().replace(" ", "");
holder.mName.setText(name.toUpperCase());
holder.mLogo.setImageResource(currentCurrency.getLogo(name));
holder.checkBox.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (holder.checkBox.isChecked()) {
list.get(position).setChecked(true);
checkedCurrencies.add(currentCurrency);
} else if (!holder.checkBox.isChecked()) {
list.get(position).setChecked(false);
checkedCurrencies.remove(currentCurrency);
}
//calling the interference's function
onSelection(checkedCurrencies);
}
});
}
#Override
public int getItemCount() {
return list.size();
}
class VH extends RecyclerView.ViewHolder {
TextView mName, mDis;
ImageView mLogo;
CheckBox checkBox;
public VH(#NonNull View itemView) {
super(itemView);
checkBox = itemView.findViewById(R.id.checkboxAllItems);
mLogo = itemView.findViewById(R.id.ImageViewAllItemLogo);
mName = itemView.findViewById(R.id.textViewAllItemCName);
mDis = itemView.findViewById(R.id.textViewAllItemCDis);
}
}
}
Interface
public interface CurrencySelectionChangelistener {
public void onSelection(ArrayList<Currency> currencies);}
Fragment in Which I'm using RecyclerView
public class AddMoreCurrencyFragment extends Fragment implements CurrencySelectionChangelistener {
FragmentAddNewCurrencyBinding binding;
ArrayList<Currency> currencies;
Adapter adapter;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
binding = FragmentAddNewCurrencyBinding.inflate(inflater);
CurrencyContainerActivity.title.setVisibility(View.VISIBLE);
CurrencyContainerActivity.title.setText("Add Currency");
CurrencyContainerActivity.backBtn.setVisibility(View.VISIBLE);
currencies = new ArrayList<>();
for (Currency c : CurrencyContainerActivity.listOfCurrencies) {
currencies.add(new Currency(c.getName(), c.getDescription(), false));
}
adapter = new Adapter(currencies, this);
binding.recView.setAdapter(adapter);
binding.done.setOnClickListener(view -> {
});
return binding.getRoot();
}
#Override
public void onSelection(ArrayList<Currency> currencies) {
CurrencyContainerActivity.listToAdd.addAll(currencies);
Toast.makeText(getContext(), currencies.toString(), Toast.LENGTH_LONG).show();
adapter.notifyDataSetChanged();
}
}
xml layout for each item
<?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="60dp"
android:background="#color/white"
android:orientation="vertical"
android:weightSum="3">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="59dp"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="10dp"
android:weightSum="3">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.89"
app:cardCornerRadius="16dp">
<ImageView
android:id="#+id/ImageViewAllItemLogo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/flag" />
</androidx.cardview.widget.CardView>
<TextView
android:id="#+id/textViewAllItemCName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="19dp"
android:layout_weight=".75"
android:fontFamily="#font/poppins"
android:text="#string/pkr"
android:textAlignment="center"
android:textAllCaps="true"
android:textColor="#color/black"
android:textSize="16sp" />
<TextView
android:id="#+id/textViewAllItemCDis"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="10dp"
android:layout_weight="0.47"
android:fontFamily="#font/poppins"
android:text="#string/pkr"
android:textAlignment="textStart"
android:textColor="#color/black"
android:textSize="13sp" />
<CheckBox
android:id="#+id/checkboxAllItems"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_weight="0.90"
android:background="#drawable/radio_selector"
android:button="#android:color/transparent" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#3F000000" />
</LinearLayout>
Model Class
public class Currency {
private String Name, Description;
private int logo;
boolean isChecked;
public Currency(String name, String description, boolean isChecked) {
Name = name;
Description = description;
this.isChecked = isChecked;
}
public boolean isChecked() {
return isChecked;
}
public void setChecked(boolean checked) {
isChecked = checked;
}
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
public String getDescription() {
return Description;
}
public void setDescription(String description) {
Description = description;
}
}
if anything i missed can for that. Thanks
I'm trying to show the data i got from the firebase in a listview. But my textview in listview doesn't change. This output i have two document my database. Two listview appear but can't change text.Where am i wrong?
OUTPUT
Here's my CustomAdapter code
public class MissionsAdapter extends ArrayAdapter<Missions> {
public MissionsAdapter(Context context, List<Missions> object){
super(context,0, object);
}
#Override
public View getView(int position, View convertView, ViewGroup parent){
if(convertView == null){
convertView = ((Activity)getContext()).getLayoutInflater().inflate(R.layout.item_missions,parent,false);
}
Missions mission = getItem(position);
TextView titleTextView = (TextView) convertView.findViewById(R.id.mission_title);
TextView expTextView = (TextView) convertView.findViewById(R.id.mission_exp);
TextView dateTextView = (TextView) convertView.findViewById(R.id.mission_date);
TextView descriptionTextView = (TextView) convertView.findViewById(R.id.mission_description);
TextView bilgitext=(TextView) convertView.findViewById(R.id.mission_bilgi);
titleTextView.setText(mission.getTitle());
expTextView.setText(mission.getExp());
dateTextView.setText(mission.getDate());
descriptionTextView.setText(mission.getDescription());
bilgitext.setText(mission.getBilgi());
return convertView;
}
}
Missions.java
public class Missions {
public String title;
public String exp;
public String date;
public String description;
public String bilgi;
public Missions() {}
public Missions(String title, String exp, String date, String description, String bilgi) {
this.title = title;
this.exp = exp;
this.date = date;
this.description = description;
this.bilgi=bilgi;
}
public String getTitle(){
return title;
}
public String getExp(){
return exp;
}
public String getDate(){
return date;
}
public String getDescription(){
return description;
}
public String getBilgi(){
return bilgi;
}
}
item_missions.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp">
<TextView
android:id="#+id/mission_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="sans-serif-medium"
android:textAppearance="?android:textAppearanceMedium"
android:hint="There will be a title"/>
<TextView
android:id="#+id/mission_exp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="sans-serif"
android:textAppearance="?android:textAppearance"
android:hint="There will be exp"/>
<TextView
android:id="#+id/mission_date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="sans-serif"
android:textAppearance="?android:textAppearance"
android:hint="There will be a date"/>
<TextView
android:id="#+id/mission_description"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="sans-serif"
android:textAppearance="?android:textAppearance"
android:hint="There will be a description"/>
<TextView
android:id="#+id/mission_bilgi"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="sans-serif"
android:textAppearance="?android:textAppearance"
android:hint="There will be a bilgi"/>
activity_main.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/missionHeader"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Edit/Create mission"
android:gravity="center"
android:textStyle="bold"
android:textColor="#android:color/black"
android:textAllCaps="true"
android:textSize="30dp"
android:paddingTop="20dp"
/>
<ListView
android:id="#+id/missionList"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
And finally MainActivity
public class MainActivity5 extends AppCompatActivity {
private final String COLLECTION_KEY = "İlanlar";
private TextView mHeaderView;
private ListView mMissionListView;
private FirebaseFirestore db;
private MissionsAdapter mMissionAdapter;
private ArrayList<Missions> mMissionsList;
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main5);
mHeaderView = (TextView) findViewById(R.id.missionHeader);
mMissionListView = (ListView) findViewById(R.id.missionList);
mHeaderView.setText("Available Missions");
db = FirebaseFirestore.getInstance();
mMissionsList = new ArrayList<Missions>();
mMissionAdapter = new MissionsAdapter(MainActivity5.this, mMissionsList);
mMissionListView.setAdapter(mMissionAdapter);
db.collection(COLLECTION_KEY).get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
#Override
public void onComplete(#NonNull Task<QuerySnapshot> task) {
List<Missions> mMissionsList = new ArrayList<>();
if(task.isSuccessful()){
for(QueryDocumentSnapshot document : task.getResult()) {
Missions miss = document.toObject(Missions.class);
mMissionsList.add(miss);
}
ListView mMissionsListView = (ListView) findViewById(R.id.missionList);
MissionsAdapter mMissionAdapter = new MissionsAdapter(MainActivity5.this, mMissionsList);
mMissionsListView.setAdapter(mMissionAdapter);
} else {
Log.d("MissionActivity", "Error getting documents: ", task.getException());
}
}
});
mMissionAdapter.addAll(mMissionsList);
}
}
I design one app where I am displaying image using recyclerView.
I am not clicking image from camera, its downloded from json api.
activity_main.xml
<?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:ads="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:layout_marginRight="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
tools:context="com.bjp.app.bjpapp.MainActivity">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/scrollView">
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</ScrollView>
</RelativeLayout>
layout_design.xml
this layout file designed for the component views and this file attaching with recyclerView.
<?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"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:layout_marginRight="16dp"
android:layout_marginLeft="16dp">
<ImageView
android:layout_width="match_parent"
android:layout_height="300dp"
android:id="#+id/image"
android:src="#drawable/logo"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="#+id/image"
android:layout_weight=".2"
android:layout_marginTop="16dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:orientation="horizontal"
android:weightSum="2">
<ImageButton
android:id="#+id/share"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1"
android:src="#drawable/share"
android:layout_marginRight="5dp"
android:theme="#style/MyButton1"/>
<ImageButton
android:id="#+id/download"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1"
android:src="#drawable/downward"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:theme="#style/MyButton1"/>
</LinearLayout>
</RelativeLayout>
Data.java (Modal class.)
this is my getter and setter class file code.
public class Data implements Serializable {
private int id;
private String imgUrl;
public Data(int id, String imgUrl) {
this.id = id;
this.imgUrl = imgUrl;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getImgUrl() {
return imgUrl;
}
public void setImgUrl(String imgUrl) {
this.imgUrl = imgUrl;
}
}
Adapter class file code is here
Image_Adaper.java
public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.ViewHolder> {
private List<Data> data;
private Context context;
private Bitmap bitmap;
String url1;
String filepath;
public ImageAdapter(List<Data> data, Context context) {
this.data = data;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_design,parent,false);
return new ImageAdapter.ViewHolder(view);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
final Data data1=data.get(position);
url1=data1.getImgUrl();
ImageView imageView=holder.imageView;
Glide.with(context)
.load(data1.getImgUrl())
.placeholder(R.drawable.logo)
.into(imageView);
}
#Override
public int getItemCount() {
return data.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
public ImageView imageView;
public ImageButton share,download;
public ViewHolder(final View itemView) {
super(itemView);
imageView=(ImageView)itemView.findViewById(R.id.image);
share=(ImageButton)itemView.findViewById(R.id.share);
download=(ImageButton)itemView.findViewById(R.id.download);
share.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int position=getAdapterPosition();
Data data2=data.get(position);
// i want to share a image with social sites
Toast.makeText(context,"Product id "+data2+" btn working",Toast.LENGTH_LONG).show();
}
});
download.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(context,"download btn working"+url1,Toast.LENGTH_LONG).show();
}
});
}
}
}
I am attaching the mail layout screenshot for more understanding.
The image should be downloaded on click of the download button.
and Image should be shareable to social apps.
I tried some code but it is not working.
Please, guys, help me to find solutions.
Thank you in advance.
please find the attachment of this image
Please refer below link for download or save image from image view
Save image from ImageView to device gallery
For Sharing image foloww below link
https://developer.android.com/training/sharing/send.html
I am trying to implement a RecyclerView with two different layouts. In the MainActivity I first create ListItem object and add it to the list and then add that to the adapter, but it doesn't show. And also I am calling a method that creates ListItem object and adds it to the list and then notifies the adapter, but it still doesn't show. Here is my code so far:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="nl.iansoft.www.recyclerviewproblem.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="#+id/rvList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="100dp"
/>
</android.support.constraint.ConstraintLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private ArrayList<ListItem> listItems;
private CustomAdapter customAdapter;
private RecyclerView rvList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rvList = (RecyclerView)findViewById(R.id.rvList);
listItems = new ArrayList<>();
ListItem listItem = new ListItem("MyName", "MyLatsName", "MyEmail");
listItems.add(listItem);
customAdapter = new CustomAdapter(listItems);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(this);
rvList.setLayoutManager(mLayoutManager);
rvList.setItemAnimator(new DefaultItemAnimator());
rvList.setAdapter(customAdapter);
addItemToTheList();
}
private void addItemToTheList(){
ListItem listItem = new ListItem("MyName", "MyLatsName", "MyEmail");
listItems.add(listItem);
customAdapter.notifyDataSetChanged();
}
}
CustomAdapter.java
public class CustomAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private ArrayList<ListItem> listItems;
public class ListItem1ViewHolder extends RecyclerView.ViewHolder {
public TextView tvName;
public TextView tvLastName;
public TextView tvEmail;
public ListItem1ViewHolder(View view) {
super(view);
tvName = (TextView) view.findViewById(R.id.tvName);
tvLastName = (TextView) view.findViewById(R.id.tvLastName);
tvEmail = (TextView) view.findViewById(R.id.tvEmail);
}
}
public class ListItem2ViewHolder extends RecyclerView.ViewHolder {
public TextView tvName2;
public TextView tvLastName2;
public TextView tvEmail2;
public ListItem2ViewHolder(View view) {
super(view);
tvName2 = (TextView) view.findViewById(R.id.tvName2);
tvLastName2 = (TextView) view.findViewById(R.id.tvLastName2);
tvEmail2 = (TextView) view.findViewById(R.id.tvEmail2);
}
}
public CustomAdapter(ArrayList<ListItem> listItems) {
this.listItems = listItems;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView;
if(viewType == 1){
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.my_list_item, parent, false);
return new CustomAdapter.ListItem1ViewHolder(itemView);
}else{
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.my_list_item2, parent, false);
return new CustomAdapter.ListItem2ViewHolder(itemView);
}
}
#Override
public int getItemViewType(int position) {
if(listItems.get(position).getName().equals("MyName")){
return 1;
}else{
return 2;
}
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
ListItem listItem = listItems.get(position);
if(holder.getItemViewType() == 1) {
ListItem1ViewHolder listItem1ViewHolder = (ListItem1ViewHolder) holder;
listItem1ViewHolder.tvName.setText(listItem.getName());
listItem1ViewHolder.tvLastName.setText(listItem.getLastName());
listItem1ViewHolder.tvEmail.setText(listItem.getEmail());
}else{
ListItem2ViewHolder listItem2ViewHolder = (ListItem2ViewHolder)holder;
listItem2ViewHolder.tvName2.setText(listItem.getName());
listItem2ViewHolder.tvLastName2.setText(listItem.getLastName());
listItem2ViewHolder.tvEmail2.setText(listItem.getEmail());
}
}
#Override
public int getItemCount() {
return listItems.size();
}
}
ListItem.java
public class ListItem {
private String name;
private String lastName;
private String email;
public ListItem() {
}
public ListItem(String name, String lastName, String email) {
this.name = name;
this.lastName = lastName;
this.email = email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
my_list_item2.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/tvName2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
android:text="Name2"
android:layout_marginTop="15dp"
android:padding="5dp"/>
<TextView
android:id="#+id/tvLastName2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:text="Last Name2"
android:layout_below="#+id/tvName2"
android:layout_marginTop="10dp"
android:padding="5dp" />
<TextView
android:id="#+id/tvEmail2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
android:text="my#email.com"
android:layout_below="#+id/tvLastName2"
android:layout_marginTop="5dp"
android:padding="5dp" />
</RelativeLayout>
my_list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
android:text="Name"
android:layout_marginTop="15dp"
android:padding="5dp"/>
<TextView
android:id="#+id/tvLastName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:text="Last Name"
android:layout_below="#+id/tvName"
android:layout_marginTop="10dp"
android:padding="5dp" />
<TextView
android:id="#+id/tvEmail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
android:text="my#email.com"
android:layout_below="#+id/tvLastName"
android:layout_marginTop="5dp"
android:padding="5dp" />
</RelativeLayout>
The issue is in ConstraintLayout. Because you haven't specified any constraints to your RecyclerView.
Either specify constraints, or move to another layout (e.g. FrameLayout).
But specifically in this case you do not need parent layout, because it is useless, as long as you have only RecyclerView in your view hierarchy.