checkbox change on recycler view after every data load

checkbox change on recycler view after every data load - android

i want to use a checkbox on items in recyclerview i load data from the server 4 by 4 (after seeing the last item he add another 4 new item)but the problem when add new items the checked item change to another item idon't know why i want to save every item checked on SharedPreferences to use them on commande activity
some pictures :
enter image description here
after going dow i found another item checked and the firs one uchecked :
enter image description here
card.xml
<android.support.v7.widget.CardView
android:id="#+id/card_view"
android:layout_width="wrap_content"
android:layout_height="119dp"
android:layout_gravity="center"
android:elevation="3dp"
card_view:cardCornerRadius="1dp"
card_view:cardElevation="4dp"
card_view:cardUseCompatPadding="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/txt_idArticle1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:text="ID Article : "
android:textColor="#android:color/black"
android:textStyle="normal|bold" />
<TextView
android:id="#+id/txt_reference1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/txt_des"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginBottom="5dp"
android:text="Reference : "
android:textColor="#android:color/background_dark"
android:textStyle="normal|bold" />
<TextView
android:id="#+id/txt_des1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/txt_prix"
android:layout_alignBottom="#+id/txt_prix"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:text="Prix : "
android:textColor="#android:color/background_dark"
android:textStyle="normal|bold" />
<TextView
android:id="#+id/txt_des"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toEndOf="#+id/txt_prix1"
android:layout_toRightOf="#+id/txt_prix1"
android:text="TextView" />
<TextView
android:id="#+id/txt_prix"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/txt_prix1"
android:layout_toEndOf="#+id/txt_des1"
android:layout_toRightOf="#+id/txt_des1"
android:text="TextView" />
<TextView
android:id="#+id/txt_idArticle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toEndOf="#+id/txt_idArticle1"
android:layout_toRightOf="#+id/txt_idArticle1"
android:text="TextView" />
<TextView
android:id="#+id/txt_reference"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/txt_reference1"
android:layout_alignBottom="#+id/txt_reference1"
android:layout_toEndOf="#+id/txt_reference1"
android:layout_toRightOf="#+id/txt_reference1"
android:text="TextView" />
<TextView
android:id="#+id/txt_prix1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/txt_reference1"
android:layout_marginBottom="5dp"
android:text="Designation : "
android:textColor="#android:color/black"
android:textStyle="normal|bold" />
<CheckBox
android:id="#+id/checkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="panier"
android:textSize="10sp" />
</RelativeLayout>
</android.support.v7.widget.CardView>
recherche_art.java
package com.example.bacha.pfe.activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Toast;
import com.example.bacha.pfe.R;
import com.example.bacha.pfe.adapter.ArticleAdapter;
import com.example.bacha.pfe.classes.Article;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class recherche_art extends AppCompatActivity {
private RecyclerView recyclerView ;
private GridLayoutManager gridLayoutManager;
private ArticleAdapter adapter ;
private List<Article> data_list ;
private String recherche_article;
private ImageButton btnrechArt ;
private EditText arech;
int d;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recherche_art);
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
btnrechArt = (ImageButton) findViewById(R.id.btnrechArt);
recherche_art.this.onRestart();
btnrechArt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
d=0;
Log.d("PFE", String.valueOf(d));
arech= (EditText) findViewById(R.id.eTextRechArt);
data_list = new ArrayList<>();
recherche_article=arech.getText().toString();
load_article_from_server(d);
gridLayoutManager = new GridLayoutManager(recherche_art.this,1);
recyclerView.setLayoutManager(gridLayoutManager);
adapter = new ArticleAdapter(recherche_art.this,data_list);
recyclerView.setAdapter(adapter);
}
});
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
if(gridLayoutManager.findLastCompletelyVisibleItemPosition() == data_list.size()-1){
d=data_list.size();
load_article_from_server(d);
Log.d("PFE", String.valueOf(d));
}
}
});
}
private void load_article_from_server(final int id) {
AsyncTask<Integer, Void, Void> task = new AsyncTask<Integer,Void, Void>() {
#Override
protected Void doInBackground(Integer... Params) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url("http://10.0.2.2/slim/article/"+recherche_article+"/"+id).build();
try {
Response response = client.newCall(request).execute();
JSONArray array = new JSONArray(response.body().string());
for(int i=0;i<array.length();i++){
JSONObject object = array.getJSONObject(i);
Article data = new Article(/*dd,*/object.getString("id_Article"),object.getString("Reference"),object.getString("Designation"),object.getString("PVTTC"));
data_list.add(data);
}
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
System.out.print("End of content");
}
return null ;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
adapter.notifyDataSetChanged();
}
};
task.execute(id);
}
}
activity_recherche_art.xml
<TextView
android:text="Recherche Article :"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:textSize="24sp"
android:textStyle="normal|bold"
android:textAlignment="center"
android:textColor="?attr/colorPrimary"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/recherche"
android:id="#+id/btnrechArt"
android:layout_marginRight="20dp"
android:layout_marginEnd="20dp"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignTop="#+id/eTextRechArt"
/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="#+id/eTextRechArt"
android:layout_below="#+id/textView"
android:layout_toLeftOf="#+id/btnrechArt"
android:layout_toStartOf="#+id/btnrechArt" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
article_view:cardUseCompatPadding="true"
article_view:cardElevation="5dp"
article_view:cardCornerRadius="5dp"
android:scrollbars="vertical"
android:layout_marginTop="18dp"
android:layout_below="#+id/btnrechArt"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
Article.java
package com.example.bacha.pfe.classes;
import java.io.Serializable;
/**
* Created by BACHA on 07/03/2017.
*/
public class Article implements Serializable {
private int id;
private String id_Article,Reference,Designation,PVTTC;
public Article(/*int id,*/ String id_Article, String reference, String designation, String PVTTC) {
// this.id = id;
this.id_Article = id_Article;
Reference = reference;
Designation = designation;
this.PVTTC = PVTTC;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getId_Article() {
return id_Article;
}
public void setId_Article(String id_Article) {
this.id_Article = id_Article;
}
public String getReference() {
return Reference;
}
public void setReference(String reference) {
Reference = reference;
}
public String getDesignation() {
return Designation;
}
public void setDesignation(String designation) {
Designation = designation;
}
public String getPVTTC() {
return PVTTC;
}
public void setPVTTC(String PVTTC) {
this.PVTTC = PVTTC;
}
}
ArticleAdapter.java
package com.example.bacha.pfe.adapter;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.TextView;
import com.example.bacha.pfe.R;
import com.example.bacha.pfe.activity.ArticleDetail;
import com.example.bacha.pfe.classes.Article;
import java.util.List;
import static com.example.bacha.pfe.R.layout.card;
/**
* Created by BACHA on 08/03/2017.
*/
public class ArticleAdapter extends RecyclerView.Adapter<ArticleAdapter.ViewHolder> {
private static Context context ;
private List<Article> my_data ;
public ArticleAdapter(Context context, List<Article> my_data) {
this.context = context;
this.my_data = my_data;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(card,parent,false);
return new ArticleAdapter.ViewHolder(itemView);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.id_Article.setText(my_data.get(position).getId_Article());
holder.Reference.setText(my_data.get(position).getReference());
holder.Designation.setText(my_data.get(position).getDesignation());
holder.PVTTC.setText(my_data.get(position).getPVTTC());
holder.root.setTag(my_data.get(position));
}
#Override
public int getItemCount() {
return my_data.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public TextView id_Article,Reference,Designation,PVTTC;
View root;
public ViewHolder(View itemView) {
super(itemView);
root = itemView;
root.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Article art = (Article)v.getTag();
Intent intent = new Intent(context, ArticleDetail.class);
intent.putExtra("REFERENCE", art.getReference());
context.startActivity(intent);
}
});
id_Article=(TextView) itemView.findViewById(R.id.txt_idArticle);
Reference=(TextView) itemView.findViewById(R.id.txt_reference);
Designation=(TextView) itemView.findViewById(R.id.txt_des);
PVTTC=(TextView) itemView.findViewById(R.id.txt_prix);
}
#Override
public void onClick(View v) {
}
}
}

Related

error E/RecyclerView: No adapter attached; skipping layout problem in implementing intent under holder.itemView.setOnClickListener

I am getting the error E/RecyclerView: No adapter attached; skipping layout
here is my code.. The code runs fine except the intent method. Profile activity has no recycler view.
when I click to start the intent it shows the error in logcat
2020-06-14 09:53:06.887 3521-3521/com.technolgiya.nitcalling11 E/RecyclerView: No adapter attached; skipping layout
FirebaseRecyclerAdapter<Contacts,FindFriendsViewHolder> firebaseRecyclerAdapter
= new FirebaseRecyclerAdapter<Contacts, FindFriendsViewHolder>(options) {
#Override
protected void onBindViewHolder(#NonNull final FindFriendsViewHolder holder, final int position, #NonNull final Contacts model)
{
holder.userNameTxt.setText(model.getName());
Picasso.get().load(model.getImage()).into(holder.profileImageView);
String visit_user_id = getRef(position).getKey();
Toast.makeText(FindPeopleActivity.this, "view on:" + visit_user_id+getRef(position), Toast.LENGTH_LONG).show();
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
holder.getAdapterPosition();
String visit_user_id = getRef(position).getKey();
Toast.makeText(FindPeopleActivity.this, "clicked on:" + visit_user_id, Toast.LENGTH_LONG).show();
Intent intent = new Intent (FindPeopleActivity.this, ProfileActivity.class);
intent.putExtra("visit_user_id", visit_user_id);
intent.putExtra("profile_image", model.getImage());
intent.putExtra("profile_name", model.getName());
startActivity(intent);
}
});
}
here is my recycler view
<?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=".FindPeopleActivity">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar_layout_find_people"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar_contacts"
android:layout_width="match_parent"
android:layout_height="60dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="#+id/search_user_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="find freiend..."
android:textColorHint="#android:color/white"
android:textAlignment="center"
android:layout_marginRight="16dp"
android:drawableLeft="#drawable/search"
android:textColor="#android:color/white"
android:layout_centerVertical="true"
>
</EditText>
</RelativeLayout>
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/find_friends_list"
android:layout_below="#+id/app_bar_layout_find_people"
android:layout_width="match_parent"
android:layout_height="match_parent">
</androidx.recyclerview.widget.RecyclerView>
</RelativeLayout>
here is my ProfileActivity.java
package com.technolgiya.nitcalling11;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.squareup.picasso.Picasso;
public class ProfileActivity extends AppCompatActivity {
private String receiverUserID="";
private String receiverUserImage="";
private String receiverUserName="";
private ImageView background_profile_view;
private TextView name_profile;
private Button add_friend;
private Button decline_friend_request;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
background_profile_view.findViewById(R.id.background_profile_view);
name_profile = findViewById(R.id.name_profile);
add_friend = findViewById(R.id.add_friend);
decline_friend_request = findViewById(R.id.decline_friend_request);
receiverUserID = getIntent().getExtras().get("visit_user_id").toString();
receiverUserImage = getIntent().getExtras().get("profile_image").toString();
receiverUserName = getIntent().getExtras().get("profile_name").toString();
Toast.makeText(this, receiverUserID, Toast.LENGTH_SHORT).show();
Picasso.get().load(receiverUserImage).into(background_profile_view);
name_profile.setText(receiverUserName);
}
}
here is my activity_profile.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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ProfileActivity">
<ImageView
android:id="#+id/background_profile_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/profile_image"
android:scaleType="centerCrop"
>
</ImageView>
<TextView
android:id="#+id/name_profile"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="User name"
android:textColor="#color/colorPrimary"
android:textSize="30dp"
android:maxLines="2"
android:textStyle="bold"
android:gravity="center"
android:layout_centerInParent="true"
>
</TextView>
<Button
android:id="#+id/add_friend"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textAllCaps="false"
android:textColor="#android:color/white"
android:layout_below="#+id/name_profile"
android:layout_marginTop="35dp"
android:layout_marginLeft="35dp"
android:layout_marginRight="35dp"
android:layout_marginBottom="12dp"
android:background="#color/colorPrimary"
android:text="Add Friend"
android:padding="5dp"
>
</Button>
<Button
android:id="#+id/decline_friend_request"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textAllCaps="false"
android:textColor="#android:color/white"
android:layout_below="#+id/add_friend"
android:layout_marginTop="1dp"
android:layout_marginLeft="35dp"
android:layout_marginRight="35dp"
android:layout_marginBottom="12dp"
android:background="#color/colorPrimary"
android:text="Cancel Friend Request"
android:padding="5dp"
android:visibility="gone"
>
</Button>
</RelativeLayout>
here is the whole code of FindPeople_Activity
package com.technolgiya.nitcalling11;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.squareup.picasso.Picasso;
public class FindPeopleActivity extends AppCompatActivity {
private RecyclerView findFriendList;
private EditText searchET;
private String str = "";
private DatabaseReference usersRef;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_find_people);
usersRef = FirebaseDatabase.getInstance().getReference().child("Users");
FirebaseRecyclerOptions<Contacts> options = null;
searchET = findViewById(R.id.search_user_text);
findFriendList = findViewById(R.id.find_friends_list);
findFriendList.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
searchET.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence charseq, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence charseq, int start, int before, int count) {
if (searchET.getText().toString().equals("")) {
Toast.makeText(FindPeopleActivity.this, "please write name to search", Toast.LENGTH_SHORT).show();
} else {
str = charseq.toString();
onStart();
}
}
#Override
public void afterTextChanged(Editable charseq) {
}
});
}
#Override
protected void onStart() {
super.onStart();
FirebaseRecyclerOptions<Contacts> options = null;
if(str.equals(""))
{
options =
new FirebaseRecyclerOptions.Builder<Contacts>()
.setQuery(usersRef, Contacts.class)
.build();
}
else
{
options =
new FirebaseRecyclerOptions.Builder<Contacts>()
.setQuery(usersRef.orderByChild("name")
.startAt(str)
.endAt(str + "\uf8ff")
, Contacts.class)
.build();
}
FirebaseRecyclerAdapter<Contacts,FindFriendsViewHolder> firebaseRecyclerAdapter
= new FirebaseRecyclerAdapter<Contacts, FindFriendsViewHolder>(options) {
#Override
protected void onBindViewHolder(#NonNull final FindFriendsViewHolder holder, final int position, #NonNull final Contacts model)
{
holder.userNameTxt.setText(model.getName());
Picasso.get().load(model.getImage()).into(holder.profileImageView);
String visit_user_id = getRef(position).getKey();
Toast.makeText(FindPeopleActivity.this, "view on:" + visit_user_id+getRef(position), Toast.LENGTH_LONG).show();
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
holder.getAdapterPosition();
String visit_user_id = getRef(position).getKey();
Toast.makeText(FindPeopleActivity.this, "clicked on:" + visit_user_id, Toast.LENGTH_LONG).show();
Intent intent = new Intent (FindPeopleActivity.this, ProfileActivity.class);
intent.putExtra("visit_user_id", visit_user_id);
intent.putExtra("profile_image", model.getImage());
intent.putExtra("profile_name", model.getName());
startActivity(intent);
}
});
}
#NonNull
#Override
public FindFriendsViewHolder onCreateViewHolder(#NonNull ViewGroup p, int viewType)
{
View view = LayoutInflater.from(p.getContext()).inflate(R.layout.contact_design,p,false);
FindFriendsViewHolder viewHolder = new FindFriendsViewHolder(view);
return viewHolder;
}
};
findFriendList.setAdapter(firebaseRecyclerAdapter);
firebaseRecyclerAdapter.startListening();
}
public static class FindFriendsViewHolder extends RecyclerView.ViewHolder
{
TextView userNameTxt;
Button videoCallBtn;
ImageView profileImageView;
RelativeLayout cardView;
public FindFriendsViewHolder(#NonNull View itemView) {
super(itemView);
userNameTxt=itemView.findViewById(R.id.name_contact);
videoCallBtn=itemView.findViewById(R.id.call_btn);
profileImageView=itemView.findViewById(R.id.image_contact);
cardView=itemView.findViewById(R.id.card_view1);
videoCallBtn.setVisibility(View.GONE);
}
}
}
here is my contacts.java
package com.technolgiya.nitcalling11;
public class Contacts
{
String name,image,status,uid;
public Contacts() {
}
public Contacts(String name, String image, String status, String uid) {
this.name = name;
this.image = image;
this.status = status;
this.uid = uid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getUid() {
return uid;
}
public void setUid(String uid) {
this.uid = uid;
}
}
here is the activity_contacts.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"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar_layout_contacts"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar_contacts"
android:layout_width="match_parent"
android:layout_height="50dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Contacts"
android:textSize="20dp"
android:textStyle="bold"
android:textColor="#android:color/white"
android:layout_centerVertical="true"
>
</TextView>
<ImageView
android:id="#+id/find_people_btn"
android:layout_width="38dp"
android:layout_height="40dp"
android:layout_alignParentEnd="true"
android:layout_marginEnd="12dp"
android:src="#drawable/find_people"
android:tint="#android:color/white"
>
</ImageView>
</RelativeLayout>
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/contact_list"
android:layout_below="#+id/app_bar_layout_contacts"
android:orientation="vertical"
android:layout_above="#+id/nav_view"
android:layout_width="match_parent"
android:layout_height="match_parent">
</androidx.recyclerview.widget.RecyclerView>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/nav_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?android:attr/windowBackground"
android:layout_alignParentBottom="true"
app:menu="#menu/bottom_nav_menu" />
</RelativeLayout>
UPDATE:
I got:
Unable to start activity ComponentInfo{com.technolgiya.nitcalling11/com.technolgiya.nitcalling11.ProfileActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.widget.ImageView.findViewById(int)' on a null object reference

Please Try to start listening for Firebase data before setting the adapter, so
replace
findFriendList.setAdapter(firebaseRecyclerAdapter);
firebaseRecyclerAdapter.startListening();
with
firebaseRecyclerAdapter.startListening();
findFriendList.setAdapter(firebaseRecyclerAdapter);
in your onStart() method.
UPDATE
Unable to start activity ComponentInfo{com.technolgiya.nitcalling11/com.technolgiya.nitcalling11.ProfileActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.widget.ImageView.findViewById(int)' on a null object reference
In ProfileActivity Replace
background_profile_view.findViewById(R.id.background_profile_view);
With
background_profile_view = findViewById(R.id.background_profile_view);

Firestore RecyclerView not displaying the items in the app

I am using firestore recyclerview, but the items is not displayed on the app. I don't know what the problem is. I used is t before in other projects but still i don't get the mistake I made.
Display Fragment:
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
import com.google.firebase.firestore.CollectionReference;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.Query;
import butterknife.BindView;
import butterknife.ButterKnife;
public class HospitalFragment extends Fragment {
#BindView(R.id.hospitalList)
RecyclerView hospitalList;
CollectionReference medcenters;
FirebaseFirestore ref;
HospitalAdapter hospitalAdapter;
private String TAG="TAG";
public HospitalFragment() {
// Required empty public constructor
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.fragment_hospital, container, false);
ButterKnife.bind(this,view);
return view;
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Log.e(TAG, "onViewCreated: "+hospitalList);
rvSetUp();
dbSetup();
}
private void dbSetup() {
ref=FirebaseFirestore.getInstance();
medcenters=ref.collection("MedicalCenters");
Query query=medcenters.orderBy("name");
FirestoreRecyclerOptions<RVCell> options=new FirestoreRecyclerOptions.Builder<RVCell>()
.setQuery(query,RVCell.class)
.build();
hospitalAdapter=new HospitalAdapter(options,getContext());
hospitalList.setAdapter(hospitalAdapter);
}
private void rvSetUp() {
hospitalList.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager=new LinearLayoutManager(getContext());
hospitalList.setLayoutManager(layoutManager);
}
#Override
public void onStart() {
super.onStart();
hospitalAdapter.startListening();
}
#Override
public void onStop() {
super.onStop();
hospitalAdapter.stopListening();
}
}
Adapter. This is the adapter which extends recyclerview Adapter :
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 com.firebase.ui.firestore.FirestoreRecyclerAdapter;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
public class HospitalAdapter extends FirestoreRecyclerAdapter<RVCell,HospitalAdapter.ViewHolder> {
Context context;
public HospitalAdapter(#NonNull FirestoreRecyclerOptions<RVCell> options, Context context){
super(options);
this.context=context;
}
#Override
protected void onBindViewHolder(#NonNull ViewHolder holder, int position, #NonNull RVCell model)
{
holder.location.setText(model.getLocation());
holder.title.setText(model.getMCName());
holder.phone.setText(model.getPhno());
holder.time.setText(model.getTime());
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(context).inflate(R.layout.rv_cell, parent, false);
return new ViewHolder(v);
}
public class ViewHolder extends RecyclerView.ViewHolder {
TextView title,location,time,phone;
public ViewHolder(#NonNull View itemView) {
super(itemView);
title=itemView.findViewById(R.id.title);
location=itemView.findViewById(R.id.location);
time=itemView.findViewById(R.id.time);
phone=itemView.findViewById(R.id.phno);
}
}
}
Cell. This is the POJO class :
public class RVCell {
String MCName,location,time,phno,picurl,locurl;
public String getMCName() {
return MCName;
}
public void setMCName(String MCName) {
this.MCName = MCName;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public String getTime() {
return time;
}
public void setTime(String time) {
this.time = time;
}
public String getPhno() {
return phno;
}
public void setPhno(String phno) {
this.phno = phno;
}
public String getPicurl() {
return picurl;
}
public void setPicurl(String picurl) {
this.picurl = picurl;
}
public String getLocurl() {
return locurl;
}
public void setLocurl(String locurl) {
this.locurl = locurl;
}
}
Main Layout. RecyclerView Layout :
<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=".HospitalFragment">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/hospitalList"/>
</FrameLayout>
Cell layout. This is the layout used to diplay the items in the recycler view:
<?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="wrap_content"
android:layout_marginTop="8dp">
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Location"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/container"
android:background="#color/card_bg_color" />
<RelativeLayout
android:id="#+id/container"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="24dp"
android:background="#drawable/card_bg"
android:paddingBottom="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent">
<TextView
android:id="#+id/location"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/title"
android:layout_alignStart="#+id/title"
android:layout_alignLeft="#id/title"
android:layout_marginTop="8dp"
android:layout_marginRight="16dp"
android:lineSpacingExtra="8dp"
android:text="Location:"
android:textColor="#color/content_text_color" />
<TextView
android:id="#+id/time"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/location"
android:layout_alignStart="#+id/location"
android:layout_alignLeft="#id/location"
android:layout_marginTop="8dp"
android:layout_marginRight="16dp"
android:lineSpacingExtra="8dp"
android:text="Time:"
android:textColor="#color/content_text_color" />
<TextView
android:id="#+id/phno"
android:layout_width="333dp"
android:layout_height="wrap_content"
android:layout_below="#id/location"
android:layout_alignStart="#+id/time"
android:layout_alignLeft="#id/time"
android:layout_marginStart="-2dp"
android:layout_marginLeft="-2dp"
android:layout_marginTop="34dp"
android:layout_marginRight="16dp"
android:lineSpacingExtra="8dp"
android:text="Phone:"
android:textColor="#color/content_text_color" />
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginStart="40dp"
android:layout_marginLeft="40dp"
android:layout_marginTop="20dp"
android:text="Simple Title Text "
android:textColor="#color/colorPrimary"
android:textStyle="bold" />
</RelativeLayout>
<ImageView
android:id="#+id/img_user"
android:layout_width="36dp"
android:layout_height="36dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
app:layout_constraintEnd_toStartOf="#+id/container"
app:layout_constraintStart_toStartOf="#+id/container"
app:layout_constraintTop_toTopOf="#+id/container"
app:srcCompat="#mipmap/ic_launcher" />
</androidx.constraintlayout.widget.ConstraintLayout>
This the code. I searched a lot I did not find any mistakes. I also used the listeners of the recycler adapter. If any body can help it would be nice.

Which information has your TAG?
It has to have Name of your Activity, try this:
private static final String TAG = „HospitalFragment“;

Expandable layout Expands upwards instead of downwards

When i try to put my Expandable layout to the bottom of my cardview using
android:layout_gravity="bottom" it goes to the bottom but expands upwards
After clicking the relative layout "button"
I am getting data from arraylist passing it to the recyclerview and cardview
i don't know if it's because of the Adapter animation settings or just fomr the 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:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:layout_gravity="top"
android:id="#+id/cardview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginEnd="8dp"
android:layout_marginBottom="551dp"
android:animateLayoutChanges="true"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/holderimg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:layout_marginBottom="15dp"
android:orientation="horizontal">
<ImageView
android:id="#+id/imageView5"
android:layout_width="68dp"
android:layout_height="62dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"
app:srcCompat="#drawable/s1960678" />
<TextView
android:id="#+id/nameArray"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:fontFamily="serif"
android:includeFontPadding="false"
android:text="TextView"
android:textSize="14sp"
android:textStyle="bold" />
<RelativeLayout
android:id="#+id/button"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_alignParentRight="true"
android:layout_gravity="right"
android:layout_marginTop="30dp"
android:layout_marginRight="10dp"
android:background="#drawable/ic_arrow_drop_down_black_24dp"
android:foregroundGravity="right"
android:gravity="right|center_horizontal"
android:orientation="vertical">
<View
android:id="#+id/view2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
<com.github.aakira.expandablelayout.ExpandableLinearLayout
android:id="#+id/expandableLayout"
android:layout_width="match_parent"
android:layout_height="72dp"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
android:foregroundGravity="bottom"
android:gravity="top"
android:orientation="vertical"
app:ael_duration="400"
app:ael_expanded="false">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<Button
android:id="#+id/button3"
android:layout_width="199dp"
android:layout_height="wrap_content"
android:text="Button"
tools:text="Download .PDF" />
<Button
android:id="#+id/button5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button"
tools:text="View PDF" />
</LinearLayout>
</com.github.aakira.expandablelayout.ExpandableLinearLayout>
</android.support.v7.widget.CardView>
</RelativeLayout>
and here's the activity it gets data from , it's xml has only recyclerview
package com.example.imc.PDF;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.example.imc.MainAdapter;
import com.example.imc.MySingleton;
import com.example.imc.R;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class Resultsdwldview extends AppCompatActivity {
public RequestQueue requestQueue;
TextView MedicalText,PhoneText,AddressText,EmailText,result,resultArray;
EditText id;
Button getidbtn;
List<ArrayList<String>> Tests = new ArrayList<>();
ArrayList<String> urlArray = new ArrayList<String>();
ArrayList<String> nameArray = new ArrayList<String>();
ArrayList<String> IdfromjsonArray = new ArrayList<String>();
ArrayList<String> Patient_ID_Array = new ArrayList<String>();
RecyclerView mRecyclerView;
RecyclerView.LayoutManager mLayoutManager;
RecyclerView.Adapter mAdapter;
WebView webView;
String PDFurl;
String idvalue;
String url = "https://docs.google.com/viewer?url=http://www.adobe.com/devnet/acrobat/pdfs/pdf_open_parameters.pdf";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_resultsdwldview);
MedicalText = findViewById(R.id.MedicalText);
PhoneText = findViewById(R.id.PhoneText);
AddressText = findViewById(R.id.AddressText);
EmailText = findViewById(R.id.EmailText);
// webView = findViewById(R.id.webview); //WEBVIEW
// webView.requestFocus();
// webView.getSettings().setJavaScriptEnabled(true);
// webView.loadUrl(url);
mRecyclerView = findViewById(R.id.recyvlerView);
// id = findViewById(R.id.getid);
// getidbtn =(Button) findViewById(R.id.send);
mLayoutManager = new LinearLayoutManager(this);
jsonParse();
/*
getidbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//idvalue = id.getEditableText().toString();
jsonParse();
}
});*/
}
public void jsonParse() {
String URL="http://ashaaban-001-site1.btempurl.com/api/patients/"+4;
//String URL="http://ashaaban-001-site1.btempurl.com/api/patients/"+idvalue;
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, URL, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("Tests");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject arraydata = jsonArray.getJSONObject(i);
// Tests.add(jsonObject.getString(String.valueOf(i)));
String urlName = arraydata.getString("urlName");
String Name =arraydata.getString("Name");
String Idfromjson =arraydata.getString("Id");
String P_ID_Array =arraydata.getString("patients_Id");
urlArray.add(urlName);
nameArray.add(Name);
IdfromjsonArray.add(Idfromjson);
Patient_ID_Array.add(P_ID_Array);
Tests.add(urlArray);
Tests.add(nameArray);
Tests.add(IdfromjsonArray);
Tests.add(Patient_ID_Array);
// resultArray.append("urlName = " +urlName+" \n\n Name"+Name);
}
//resultArray.append(Tests+" , \n ");
// mRecyclerView.setHasFixedSize(true);
} catch (JSONException e) {
e.printStackTrace();
}
try {
Integer P_MedicalNumber = response.getInt("MedicalNumber");
Integer P_id = response.getInt("Id");
String P_Username = response.getString("UserName");
Integer P_PhoneNumber = response.getInt("phoneNumber");
String P_Address = response.getString("Address");
String P_Email = response.getString("Email");
//result.append("Medical Number : "+P_MedicalNumber+" \n id :"+P_id+"UserName"+P_Username);
} catch (JSONException e) {
e.printStackTrace();
}
mAdapter = new MainAdapter(Tests,nameArray);
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setAdapter(mAdapter);
mAdapter.notifyItemRangeInserted(0, Tests.size());
// webView.loadUrl(PDFurl);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(),"error",Toast.LENGTH_SHORT).show();
}
});
// requestQueue.add(request);
MySingleton.getInstance(Resultsdwldview.this).addToReqeustQueue(jsonObjectRequest);
}
}

Adapter
package com.example.imc;
import android.animation.ObjectAnimator;
import android.content.ClipData;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.github.aakira.expandablelayout.ExpandableLayout;
import com.github.aakira.expandablelayout.ExpandableLayoutListenerAdapter;
import com.github.aakira.expandablelayout.ExpandableLinearLayout;
import com.github.aakira.expandablelayout.Utils;
import java.util.ArrayList;
import java.util.List;
public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> {
List<ArrayList<String>> Tests;
ArrayList<String> urlArray;
ArrayList<String> nameArray;
ArrayList<String> IdfromjsonArray ;
ArrayList<String> Patient_ID_Array;
SparseBooleanArray expandState =new SparseBooleanArray();
public MainAdapter(List<ArrayList<String>> tests, ArrayList<String> urlArray, ArrayList<String> nameArray,
ArrayList<String> idfromjsonArray, ArrayList<String> patient_ID_Array) {
Tests = tests;
this.urlArray = urlArray;
this.nameArray = nameArray;
IdfromjsonArray = idfromjsonArray;
Patient_ID_Array = patient_ID_Array;
}
public MainAdapter(List<ArrayList<String>> tests, ArrayList<String> nameArray) {
Tests = tests;
this.nameArray = nameArray;
}
#NonNull
#Override
//Initialize the viewholder
public MainAdapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.row,viewGroup,false);
return new ViewHolder(view);
}
/***************////////////////onBind Holds values to pass it to the viewholder///////////////////*******************
/***************////////////////
// This method is called for each ViewHolder to
// bind it to the adapter
// . This is where we will// pass our data to our ViewHolder///////////////////*******************
#Override
public void onBindViewHolder(#NonNull final MainAdapter.ViewHolder holder, final int i) {
// holder.URLName.setText( urlArray.get(i));
holder.mFullname.setText( nameArray.get(i));
holder.expandableLayout.setInRecyclerView(true);
holder.expandableLayout.setExpanded(expandState.get(i));
holder.expandableLayout.setListener(new ExpandableLayoutListenerAdapter() {
#Override
public void onPreOpen() {
changeRotate(holder.button,180f,0f).start();
expandState.put(i,true);
}
#Override
public void onPreClose() {
changeRotate(holder.button,0f,180f).start();
expandState.put(i,false);
}
});
holder.button.setRotation(expandState.get(i)?0f:180f);
holder.button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//Expandable child item
holder.expandableLayout.toggle();
}
});
}
private ObjectAnimator changeRotate(RelativeLayout button, float to, float from) {
ObjectAnimator animator = ObjectAnimator.ofFloat(button,"rotation",from,to);
animator.setDuration(200);
animator.setInterpolator(Utils.createInterpolator(Utils.LINEAR_INTERPOLATOR));
return animator;
}
#Override
public int getItemCount() {
return nameArray.size();
}
/***************////////////////VIEWHOLDER///////////////////*******************
public class ViewHolder extends RecyclerView.ViewHolder {
// public TextView URLName;
public TextView mFullname;
public RelativeLayout button;
public ExpandableLinearLayout expandableLayout;
public ViewHolder(#NonNull View itemView) {
super(itemView);
mFullname=itemView.findViewById(R.id.nameArray);
//URLName=itemView.findViewById(R.id.URLName);
button=itemView.findViewById(R.id.button);
expandableLayout=itemView.findViewById(R.id.expandableLayout);
}
}
}

there are no any display on listView with baseadapter

every one,
I am a beginning learner on android system ,
I create a small app that could get specific data , like foreign exchange rate from bank website ,
this app uses Jsoup , ListView , BaseAdapter etc...
finally , the only problem is the listView has no any display ,
could any one tell me , how to fix it.
Thanks.
Category.java
public class Category
{
String bank_name;
String page_url;
Category(String bank_name,String url)
{
this.bank_name=bank_name;
this.page_url=url;
}
#Override
public String toString()
{
return bank_name;
}
}
MainActivity.java
import android.app.Activity;
import android.os.Bundle;
import android.content.*;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends Activity
{
ArrayList<Category> items;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
items=new ArrayList<Category>();
items.add(new Category("台灣銀行","http://rate.bot.com.tw/Pages/Static/UIP003.zh-TW.htm"));
ArrayAdapter<Category> adapter = new ArrayAdapter<Category>(this , android.R.layout.simple_list_item_1 ,items);
ListView lv = (ListView)findViewById(R.id.lv);
lv.setAdapter(adapter);
lv.setOnItemClickListener(itemClick);
}
OnItemClickListener itemClick = new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> av , View v , int position , long id)
{
Category category = items.get(position);
Intent intent = new Intent();
intent.setClass(MainActivity.this , RateActivity.class );
intent.putExtra("bank_name", category.bank_name);
intent.putExtra("page_url" , category.page_url);
startActivity(intent);
}
};
RateBean.java
public class RateBean
{
private String currency;
private String cashBuy;
private String cashSold;
private String spotBuy;
private String spotSold;
public RateBean()
{
currency = "";
cashBuy = "";
cashSold = "";
spotBuy = "";
spotSold = "";
}
public RateBean(String [] strArr)
{
this.currency=strArr[0];
this.cashBuy=strArr[1];
this.cashSold=strArr[2];
this.spotBuy=strArr[3];
this.spotSold=strArr[4];
}
public RateBean(String currency , String cashBuy , String cashSold , String spotBuy ,String spotSold)
{
setCurrency(currency);
setCashBuy(cashBuy);
setCashSold(cashSold);
setSpotBuy(spotBuy);
setSpotSold(spotSold);
}
//Currency setter and getter
public void setCurrency(String currency)
{
this.currency = currency ;
}
public String getCurrency()
{
return currency;
}
//Cash buy setter and getter
public void setCashBuy(String cashBuy)
{
this.cashBuy = cashBuy;
}
public String getCashBuy()
{
return cashBuy;
}
//Cash sold setter and getter
public void setCashSold(String cashSold)
{
this.cashSold = cashSold;
}
public String getCashSold()
{
return cashSold;
}
//Spot buy setter and getter
public void setSpotBuy(String spotBuy)
{
this.spotBuy = spotBuy;
}
public String getSpotBuy()
{
return spotBuy;
}
//Spot sold setter and getter
public void setSpotSold(String spotSold)
{
this.spotSold = spotSold;
}
public String getSpotSold()
{
return spotSold;
}
}
RateActivity.java
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.util.ArrayList;
public class RateActivity extends ListActivity
{
Context context ;
ArrayList<RateBean> rateBean_item;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_rate_show);
TextView updateTime = (TextView)findViewById(R.id.updateTime_textView);
Intent intent = getIntent();
String category = intent.getStringExtra("bank_name");
String page_url = intent.getStringExtra("page_url");
setTitle(category);
context=this;
ConnectThread thread = new ConnectThread(context , rateBean_item , page_url , updateTime);
thread.start();
}
public class ConnectThread extends Thread
{
Context context;
ArrayList<RateBean> rateBean_item;
String page_url ;
TextView updateTime;
RateAdapter adapter;
RateBean rateBean;
int i =0;
public ConnectThread(Context context , ArrayList<RateBean> rateBean_item , String page_url , TextView updateTime )
{
this.context=context;
this.rateBean_item=rateBean_item;
this.page_url=page_url;
this.updateTime=updateTime;
}
#Override
public void run()
{
try
{
String currency="";
String cashBuy="";
String cashSold="";
String spotBuy="";
String spotSold="";
Document doc = Jsoup.connect(page_url).get();
rateBean_item = new ArrayList<>();
String temp=doc.select("td[style=width:326px;text-align:left;vertical-align:top;color:#0000FF;font-size:11pt;font-weight:bold;]").text();
String time=temp.substring(12);
updateTime.setText("匯率更新時間：\n" + time);
for( Element title:doc.select("td.titleLeft"))
{
currency=title.text();
if( i < doc.select("td.decimal").size())
{
cashBuy=doc.select("td.decimal").eq(i++).text();
cashSold=doc.select("td.decimal").eq(i++).text();
spotBuy=doc.select("td.decimal").eq(i++).text();
spotSold=doc.select("td.decimal").eq(i++).text();
rateBean = new RateBean( a , b , c ,d , e );
rateBean_item.add(rateBean);
}
}
adapter = new RateAdapter(context , rateBean_item);
setListAdapter(adapter);
adapter.notifyDataSetChanged();
}
catch( Exception exception )
{
exception.printStackTrace();
}
}
}
}
RateAdapter.java
import java.util.ArrayList;
import android.util.Log;
import android.widget.BaseAdapter;
import android.view.*;
import android.widget.*;
import android.content.*;
public class RateAdapter extends BaseAdapter
{
private LayoutInflater inflater;
private ArrayList<RateBean> list ;
public RateAdapter()
{
}
public RateAdapter(Context context , ArrayList<RateBean> list )
{
this.inflater = LayoutInflater.from(context);
this.list = list;
}
#Override
public int getCount()
{
return list.size();
}
#Override
public Object getItem(int position)
{
return list.get(position);
}
#Override
public long getItemId(int position)
{
return position;
}
public static class ViewHolder
{
TextView currency_name;
TextView cash_buy;
TextView cash_sold;
TextView spot_buy;
TextView spot_sold;
}
#Override
public View getView( int position , View convertView , ViewGroup parent)
{
ViewHolder holder;
if(convertView == null)
{
convertView = inflater.inflate(R.layout.rate_item , null);
holder = new ViewHolder();
holder.currency_name = (TextView)convertView.findViewById(R.id.xml_currency);
holder.cash_buy = (TextView)convertView.findViewById(R.id.xml_cashBuy);
holder.cash_sold = (TextView)convertView.findViewById(R.id.xml_cashSold);
holder.spot_buy = (TextView)convertView.findViewById(R.id.xml_spotBuy);
holder.spot_sold = (TextView)convertView.findViewById(R.id.xml_spotSold);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder)convertView.getTag();
}
RateBean rateItem = list.get(position);
holder.currency_name.setText(rateItem.getCurrency());
holder.cash_buy.setText(rateItem.getCashBuy());
holder.cash_sold.setText(rateItem.getCashSold());
holder.spot_buy.setText(rateItem.getSpotBuy());
holder.spot_sold.setText(rateItem.getSpotSold());
return convertView;
}
}
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/title_textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="銀行查詢選擇"/>
<ListView
android:id="#+id/lv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
activity_rate_show.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/updateTime_textView"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:hint="updateTime"/>
<Button
android:id="#+id/fresh_button"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:onClick="onClick"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="#string/button_fresh"/>
</LinearLayout>>
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp">
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1.5"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="#string/currency"/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="#string/cash_buy"/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="#string/cash_sold"/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="#string/spot_buy"/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="#string/spot_sold"/>
</LinearLayout>
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
</LinearLayout>
rate_item.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/xml_currency"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.25"
android:textAppearance="?android:attr/textAppearanceLarge"
android:hint="text"/>
<TextView
android:id="#+id/xml_cashBuy"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:hint="text"/>
<TextView
android:id="#+id/xml_cashSold"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:hint="text"/>
<TextView
android:id="#+id/xml_spotBuy"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:hint="text"/>
<TextView
android:id="#+id/xml_spotSold"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:hint="text"/>
</LinearLayout>

<ListView
android:id="#+id/lv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
Your listview needs a height, it cannot be wrap_content. Give it a height like 500dp or match_parent.

cant get profile image and button image in custom listview

i am a beginner in android programming and i made a custom list view which should present the user details by searching function. while i search the the user i get only the name and the mobile of the user but the default images is not presenting.
this is what i get:
and this is what i would like to get:
this is the layout for the each row in the list:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#ffffffff"
>
<ImageView
android:id="#+id/profileImage"
android:layout_width="80dp"
android:layout_height="80dp"
android:src="#drawable/camera"
android:background="#drawable/border"
android:paddingLeft="10dp"
android:paddingRight="10dp" />
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="10dp"
android:textColor="#000000"
android:textSize="16dp"
android:text="Full name"
android:layout_marginTop="5dp"
android:layout_marginLeft="10dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/profileImage"
android:layout_toEndOf="#+id/profileImage" />
<TextView
android:id="#+id/desc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:textColor="#000000"
android:textSize="14dp"
android:text="User details"
android:layout_toRightOf="#+id/profileImage"
android:layout_alignBottom="#+id/profileImage"
android:layout_toLeftOf="#+id/imageButtonInviteUser"
android:layout_toStartOf="#+id/imageButtonInviteUser"
android:layout_below="#+id/title" />
<ImageButton
android:layout_width="80dp"
android:layout_height="80dp"
android:src="#drawable/add_user_50"
android:id="#+id/imageButtonInviteUser"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:background="#drawable/border"/>
<View
android:id="#+id/divider2"
android:layout_below="#+id/profileImage"
android:layout_width="fill_parent"
android:layout_marginTop="1dp"
android:layout_height="6dp"
android:background="#android:color/darker_gray"/>
</RelativeLayout>
</RelativeLayout>
main layout:
<?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="match_parent">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="#+id/editTextSearch"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:hint="Search..." />
<View
android:id="#+id/divider1"
android:layout_below="#+id/editTextSearch"
android:layout_width="fill_parent"
android:layout_height="6dp"
android:background="#android:color/darker_gray"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/divider1"
android:id="#+id/scrollViewListView"
android:fillViewport="true"
android:layout_above="#+id/linearLayoutBtn">
<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/listViewusers"
android:layout_below="#+id/divider1"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</ScrollView>
<View
android:id="#+id/divider2"
android:layout_below="#+id/scrollViewListView"
android:layout_width="fill_parent"
android:layout_height="6dp"
android:background="#android:color/darker_gray"/>
<LinearLayout
android:id="#+id/linearLayoutBtn"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<Button android:text="Save"
android:id="#+id/ButtonSave"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
</Button>
<Button android:text="Discard"
android:id="#+id/ButtonDiscard"
android:layout_toRightOf="#+id/ButtonSave"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
</Button>
</LinearLayout>
</RelativeLayout>
custom adapter:
/**
* Created by matant on 9/24/2015.
*/
import java.util.List;
import com.example.matant.gpsportclient.R;
import com.example.matant.gpsportclient.Utilities.InviteUsersListRow;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
public class InviteUsersArrayAdapter extends ArrayAdapter<InviteUsersListRow> {
Context context;
List<InviteUsersListRow> rowUsers;
public InviteUsersArrayAdapter(Context context,int resourceId, List<InviteUsersListRow> items) {
super(context, resourceId, items);
this.context = context;
this.rowUsers = items;
}
/*private view holder class*/
private class ViewHolder {
ImageView imageView;
TextView txtTitle;
TextView txtDesc;
ImageButton imgStatus;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
InviteUsersListRow rowItem = (InviteUsersListRow) getItem(position);
LayoutInflater mInflater = (LayoutInflater) context
.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.invite_users_listview_row, null);
holder = new ViewHolder();
holder.txtDesc = (TextView) convertView.findViewById(R.id.desc);
holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
holder.imageView = (ImageView) convertView.findViewById(R.id.profileImage);
holder.imgStatus = (ImageButton) convertView.findViewById(R.id.imageButtonInviteUser);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtDesc.setText(rowItem.getDesc());
holder.txtTitle.setText(rowItem.getTitle());
holder.imageView.setImageResource(rowItem.getImageId());
holder.imgStatus.setImageResource(rowItem.getImageStatus());
return convertView;
}
#Override
public int getCount() {
return rowUsers.size();
}
#Override
public InviteUsersListRow getItem(int position) {
return rowUsers.get(position);
}
#Override
public long getItemId(int position) {
return rowUsers.indexOf(getItem(position));
}
}
row in list:
package com.example.matant.gpsportclient.Utilities;
/**
* Created by matant on 9/22/2015.
*/
public class InviteUsersListRow {
private int imageId,imagestatus;
private String title;
private String desc;
public InviteUsersListRow(int imageId,int status, String title,String desc){
this.imageId = imageId;
this.title = title;
this.desc = desc;
this.imagestatus = status;
}
public int getImageId() {
return this.imageId;
}
public void setImageId(int imageId) {
this.imageId = imageId;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public int getImageStatus(){
return this.imagestatus;
}
public void setImagestatus(int imgStatus)
{
this.imagestatus = imgStatus;
}
}
main activity:
package com.example.matant.gpsportclient.Controllers;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import com.example.matant.gpsportclient.AsyncResponse;
import com.example.matant.gpsportclient.R;
import com.example.matant.gpsportclient.Utilities.InviteUsersArrayAdapter;
import com.example.matant.gpsportclient.Utilities.InviteUsersListRow;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class InviteUsersActivity extends AppCompatActivity implements AsyncResponse, View.OnClickListener,AdapterView.OnItemClickListener {
private EditText editTextSearch;
private Button btnSave,btnDiscard;
private ListView usersListView;
private List<InviteUsersListRow> rowUser;
private DBcontroller dbController;
public static final String EXTRA_USERS = "";
ListView listViewUsers;
List<InviteUsersListRow> rowUsers;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_invite_users);
editTextSearch = (EditText) findViewById(R.id.editTextSearch);
btnSave = (Button) findViewById(R.id.ButtonSave);
btnDiscard = (Button)findViewById(R.id.ButtonDiscard);
editTextSearch.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
sendDataToDBController();
}
#Override
public void afterTextChanged(Editable s) {
}
});
btnDiscard.setOnClickListener(this);
}
#Override
public void handleResponse(String resStr) {
Log.d("invite_Response", resStr);
if (resStr != null) {
try {
JSONObject json = new JSONObject(resStr);
String flg = json.getString("flag");
Log.d("flag",flg);
switch (flg){
case "user found":{
JSONArray jsonarr = json.getJSONArray("users");
Log.d("array",jsonarr.toString());
rowUsers = new ArrayList<InviteUsersListRow>();
for(int i = 0; i < jsonarr.length();i++){
{
Log.d("user is", jsonarr.getJSONObject(i).toString());
String name = jsonarr.getJSONObject(i).getString("name");
String mobile = jsonarr.getJSONObject(i).getString("mobile");
InviteUsersListRow rowUser = new InviteUsersListRow(R.id.profileImage, R.id.imageButtonInviteUser, name, mobile);
rowUsers.add(rowUser);
}
listViewUsers = (ListView) findViewById(R.id.listViewusers);
InviteUsersArrayAdapter Useradapter = new InviteUsersArrayAdapter(this,R.layout.invite_users_listview_row,rowUsers);
listViewUsers.setAdapter(Useradapter);
listViewUsers.setOnItemClickListener(this);
}
break;
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}else
Log.d("ServiceHandler", "Couldn't get any data from the url");
}
#Override
public void sendDataToDBController() {
String username = editTextSearch.getText().toString();
BasicNameValuePair tagreq = new BasicNameValuePair("tag", "search_user");
BasicNameValuePair name = new BasicNameValuePair("name", username);
List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();
nameValuePairList.add(tagreq);
nameValuePairList.add(name);
dbController = new DBcontroller(this,this);
dbController.execute(nameValuePairList);
}
#Override
public void preProcess() {
}
#Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.ButtonDiscard:
{
Intent i = new Intent();
setResult(RESULT_CANCELED,i);;
finish();
}
}
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
}

Replace the below
InviteUsersListRow rowUser = new InviteUsersListRow(R.id.profileImage, R.id.imageButtonInviteUser, name, mobile);
with
InviteUsersListRow rowUser = new InviteUsersListRow(R.drawable.camera, R.drawable.add_user_50, name, mobile);
The pic should be from "R.drawable" not from "R.id"
You should actually set an image resource below and not an id
holder.imageView.setImageResource(rowItem.getImageId());
holder.imgStatus.setImageResource(rowItem.getImageStatus());
In the above code you are not setting a drawable item.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

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cant get profile image and button image in custom listview

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