I have list of Categories of Subjects in my firestore database and i want it to be displayed in my app ( which i thought can be done by recyclerView).But my RecyclerView is not populating any data.You can see my code below:
Question_list.java
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import com.google.firebase.firestore.DocumentChange;
import com.google.firebase.firestore.EventListener;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.FirebaseFirestoreException;
import com.google.firebase.firestore.QuerySnapshot;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Nullable;
public class Question_list extends AppCompatActivity {
private static final String TAG ="Firelog" ;
private RecyclerView mMainList;
private FirebaseFirestore mFirestore;
private CategoryAdapter categoryAdapter;
private List<Categories> list_category;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_question_list);
mMainList = (RecyclerView)findViewById(R.id.main_list_id);
//mMainList.setHasFixedSize(true);
mMainList.setLayoutManager(new LinearLayoutManager(this));
mMainList.setAdapter(categoryAdapter);
mFirestore = FirebaseFirestore.getInstance();
categoryAdapter = new CategoryAdapter(list_category);
list_category = new ArrayList<>();
mFirestore.collection("Questions").addSnapshotListener(new EventListener<QuerySnapshot>() {
#Override
public void onEvent(#Nullable QuerySnapshot queryDocumentSnapshots, #Nullable FirebaseFirestoreException e) {
if(e!=null){
Log.d(TAG, "Error: "+ e.getMessage());
}
for(DocumentChange doc: queryDocumentSnapshots.getDocumentChanges()){
if(doc.getType() == DocumentChange.Type.MODIFIED){
//String document = doc.getDocument().getString("Category");
Categories categories = doc.getDocument().toObject(Categories.class);
list_category.add(categories);
Log.d(TAG, "Category: "+ categories);
categoryAdapter.notifyDataSetChanged();
}
}
}
});
}
}
CategoryAdapter.java
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.List;
public class CategoryAdapter extends
RecyclerView.Adapter<CategoryAdapter.ViewHolder> {
public List<Categories> list_categorie;
public CategoryAdapter(List<Categories> list_categorie){
this.list_categorie = list_categorie;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.category_list,parent,false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
holder.mCategoryText.setText(list_categorie.get(position).getCategory());
}
#Override
public int getItemCount() {
return list_categorie.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
View mview;
public TextView mCategoryText;
public ViewHolder(View itemView) {
super(itemView);
mview = itemView;
mCategoryText = (TextView)mview.findViewById(R.id.category_text_id);
}
}
}
Categories.java
public class Categories {
String category;
public Categories(){}
public Categories(String category) {
this.category = category;
}
public String getCategory() {
return category;
}
}
Above are my all java classes. I haven't uploaded my XML file as i think the problem is in the java class.
categoryAdapter = new CategoryAdapter(list_category);
list_category = new ArrayList<>();
list_category should be initialized before passing it to the adapter
list_category = new ArrayList<>();
categoryAdapter = new CategoryAdapter(list_category);
Related
I am working on an Inventory Management app for which I tried to retrieve data from my fire store database but I am not able to get why . I created a Adapter file and and Data file and linked them with main file
My Code for Main Activity file
package com.example.inventorymanagment;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.util.Log;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.google.firebase.firestore.DocumentChange;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.Query;
import java.util.ArrayList;
public class Measure extends AppCompatActivity {
RecyclerView recyclerView;
ArrayList<data> itemList;
adapter adapter;
FirebaseFirestore db;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_measure);
recyclerView= findViewById(R.id.recyclerview);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
db = FirebaseFirestore.getInstance();
itemList= new ArrayList<>();
adapter= new adapter(Measure.this,itemList);
recyclerView.setAdapter(adapter);
getdata();
}
#SuppressLint("NotifyDataSetChanged")
private void getdata() {
db.collection("Inventory").orderBy("Name", Query.Direction.ASCENDING)
.addSnapshotListener((value, error) -> {
if(error!=null){
Log.e("Firestore error",error.getMessage());
return;
}
for(DocumentChange dc : value.getDocumentChanges()){
if(dc.getType() == DocumentChange.Type.ADDED){
itemList.add(dc.getDocument().toObject(data.class));
}
adapter.notifyDataSetChanged();
}
});
}
}
Code for Adapter file
package com.example.inventorymanagment;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.ArrayList;
public class adapter extends RecyclerView.Adapter<adapter.MyViewHolder>{
Context context;
ArrayList<data> itemList;
public adapter(Context context, ArrayList<data>itemList)
{
this.context = context;
this.itemList = itemList;
}
#NonNull
#Override
public adapter.MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(context).inflate(R.layout.item,parent,false);
return new MyViewHolder(v);
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, int position) {
data data = itemList.get(position);
holder.Name.setText(data.Name);
holder.Quantity.setText(String.valueOf(data.Quantity));
}
#Override
public int getItemCount() {
return itemList.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder{
TextView Name, Quantity;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
Name=itemView.findViewById(R.id.name);
Quantity=itemView.findViewById((R.id.quantity));
}
}
}
My Code for Data file
package com.example.inventorymanagment;
public class data {
String Name;
long Quantity;
public data(){}
public data(String name, long quantity) {
Name = name;
Quantity = quantity;
}
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
public long getQuantity() {
return Quantity;
}
public void setQuantity(long quantity) {
Quantity = quantity;
}
}
please help me find my error
In onBindViewHolder(#NonNull MyViewHolder holder, int position) {
data data = itemList.get(position);
holder.Name.setText(data.Name);
holder.Quantity.setText(String.valueOf(data.Quantity));
try setting data.getName() instead of data.Name
I'm trying to retrieve array of images from firestore. I uploaded the images to firebase storage and have added the url to firestore. I can see the card of images in the recycler view but the images are not visible. In Logcat, I get the links of the images which redirect to the images saved in firebase storage. I have attached the adapter class.
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.ImageView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
public class imageAdapter extends RecyclerView.Adapter<imageAdapter.holder>
{
ArrayList<String> imageUrl;
public imageAdapter(ArrayList<String> imageUrl)
{
this.imageUrl = imageUrl;
}
#NonNull
#Override
public holder onCreateViewHolder(#NonNull ViewGroup parent, int viewType)
{
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_image_item,parent,false);
return new holder(v).linkAdapter(this) ;
}
#Override
public void onBindViewHolder(#NonNull holder holder, int position)
{
Glide.with(holder.imageView.getContext()).load(imageUrl).into(holder.imageView);
}
#Override
public int getItemCount()
{
return imageUrl.size();
}
class holder extends RecyclerView.ViewHolder
{
ImageButton imageButton;
ImageView imageView;
private imageAdapter imageAdapter;
public holder(#NonNull View itemView)
{
super(itemView);
imageButton=itemView.findViewById(R.id.imageBtn);
imageView=itemView.findViewById(R.id.imageView);
imageButton.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
imageAdapter.imageUrl.remove(getAdapterPosition());
imageAdapter.notifyItemRemoved(getAdapterPosition());
}
});
}
public holder linkAdapter(imageAdapter imageAdapter)
{
this.imageAdapter = imageAdapter;
return this;
}
}
}
MainActivity.java
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import androidx.activity.result.ActivityResult;
import androidx.activity.result.ActivityResultCallback;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.darsh.multipleimageselect.activities.AlbumSelectActivity;
import com.darsh.multipleimageselect.helpers.Constants;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.material.button.MaterialButton;
import com.google.firebase.firestore.DocumentSnapshot;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.Query;
import com.marquedo.marquedo.ui.Prod_n_Cat.Product.AboutModelClass;
import com.marquedo.marquedo.ui.Prod_n_Cat.Product.ProductListAdapter1;
import com.marquedo.marquedo.ui.Prod_n_Cat.Product.ProductModelClass;
import java.util.ArrayList;
import java.util.List;
public class update_product extends AppCompatActivity
{
private String position;
private FirebaseFirestore db = FirebaseFirestore.getInstance();
private EditText category, name, details;
private RecyclerView recyclerView;
private AboutModelClass aboutModelClass;
private MaterialButton add_images_button;
private imageAdapter imageAdapter;
private ActivityResultLauncher<Intent> getResult;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_update_product);
Intent preview = new Intent(this, preview_product.class);
Button preview_prod = findViewById(R.id.show_preview);
preview_prod.setOnClickListener(view ->
{
startActivity(preview);
});
category = findViewById(R.id.prodCategory);
name = findViewById(R.id.productName);
details = findViewById(R.id.prodDetails);
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setItemAnimator(null);
Bundle intent = getIntent().getExtras();
position = intent.get("key").toString();
//Getting data from firestore and displaying it on the fields
db.collection("Store").document("TFTVHvZaHOIxjYLnHvwc").collection("products").document(position).collection("about").document("product_id").get().addOnSuccessListener(new OnSuccessListener<DocumentSnapshot>() {
#Override
public void onSuccess(#NonNull DocumentSnapshot documentSnapshot)
{
aboutModelClass = documentSnapshot.toObject(AboutModelClass.class);
String Category = aboutModelClass.getCategory();
String Name = aboutModelClass.getName();
String Details = aboutModelClass.getDetails();
ArrayList<String> Urls = (ArrayList<String>) documentSnapshot.get("Images");
Log.i("showlist", Urls.toString());
imageAdapter = new imageAdapter(Urls);
recyclerView.setAdapter(imageAdapter2);
category.setText(Category);
name.setText(Name);
details.setText(Details);
}
});
}
}
ModelClass.java
import java.util.List;
public class AboutModelClass
{
String Category, Details, Name;
List<String> urls;
public AboutModelClass()
{
}
public AboutModelClass(String category, String details, String name, List<String> urls) {
Category = category;
Details = details;
Name = name;
this.urls = urls;
}
public String getCategory() {
return Category;
}
public void setCategory(String category) {
Category = category;
}
public String getDetails() {
return Details;
}
public void setDetails(String details) {
Details = details;
}
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
public List<String> getUrls() {
return urls;
}
public void setUrls(List<String> urls) {
this.urls = urls;
}
}
I need to open another activity from a custom adapter, just like a list and then when I click on that, it will take to another activity and get a data from database and show it in the text view,
the problem is in SearchAdapter.java in the context.startActivity(intent);
here's my searchAdapter.java
package Adapter;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
//import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.example.manualdiagnosiskeperawatan.R;
import com.example.manualdiagnosiskeperawatan.isiDiagnosis;
import java.util.List;
import Model.Daftar;
class SearchViewHolder extends RecyclerView.ViewHolder{
public TextView judul, diagnosis;
public SearchViewHolder(View itemView) {
super(itemView);
judul = itemView.findViewById(R.id.judul);
diagnosis = itemView.findViewById(R.id.textViewIsi);
}
}
public class SearchAdapter extends RecyclerView.Adapter<SearchViewHolder>
{
private Context context;
private List<Daftar> data;
public SearchAdapter(Context context, List<Daftar> data) {
this.context = context;
this.data = data;
}
#Override
public SearchViewHolder onCreateViewHolder( ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View itemView = inflater.inflate(R.layout.layout_item,parent,false);
return new SearchViewHolder(itemView);
}
#Override
public void onBindViewHolder(final SearchViewHolder holder, final int position)
{
holder.judul.setText(data.get(position).getJudul());
//open activity
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(context, data.get(position).getDiagnosis(),Toast.LENGTH_SHORT).show();
//this code, isn't working
Intent intent = new Intent(context, isiDiagnosis.class);
intent.putExtra("did",data.get(position).getDid());
context.startActivity(intent);
}
});
}
#Override
public int getItemCount() {
return data.size();
}
}
and here is my isiDiagnosis.java which will be opened when I clicked the list from the SearchAdapter.java
package com.example.manualdiagnosiskeperawatan;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.widget.TextView;
import com.mancj.materialsearchbar.MaterialSearchBar;
import org.w3c.dom.Text;
import java.util.ArrayList;
import java.util.List;
import Adapter.SearchAdapter;
import Database.Database;
import Model.Daftar;
public class isiDiagnosis extends AppCompatActivity {
RecyclerView recyclerView;
RecyclerView.LayoutManager layoutManager;
SearchAdapter adapter;
Database database;
List<Daftar> daftars = new ArrayList<>();
private TextView judul, diagnosis;
private String DID = "judul";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_isi_diagnosis);
DID = getIntent().getStringExtra("judul");
database = new Database(this);
diagnosis = (TextView) findViewById(R.id.textViewIsi);
//init DB
loadData(DID);
}
private void loadData(String did) {
//i don't really know how to code, just see from the youtube, so i made this myself
// database.getDiagnosis();
// String diagnosis = daftars.get(database.getDiagnosis());
// database.getDiagnosis(diagnosis.setText());
}
}
here's my searchDiagnosis.java
package com.example.manualdiagnosiskeperawatan;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.widget.ListViewCompat;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.Adapter;
import android.widget.ListView;
import com.mancj.materialsearchbar.MaterialSearchBar;
import java.util.ArrayList;
import java.util.List;
import Adapter.SearchAdapter;
import Database.Database;
public class searchDiagnosis extends AppCompatActivity {
RecyclerView recyclerView;
RecyclerView.LayoutManager layoutManager;
SearchAdapter adapter;
Database database;
MaterialSearchBar materialSearchBar;
List<String> suggestList = new ArrayList<>();
#Override
protected void onStart() {
super.onStart();
adapter = new SearchAdapter(getBaseContext(),database.getDaftar());
recyclerView.setAdapter(adapter);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search_diagnosis);
//init view
recyclerView = (RecyclerView) findViewById(R.id.recycler_search);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(true);
materialSearchBar =(MaterialSearchBar) findViewById(R.id.search_bar);
//init DB
database = new Database(this);
//Setup search bar
materialSearchBar.setHint("Search");
materialSearchBar.setCardViewElevation(10);
loadSuggestList();
materialSearchBar.addTextChangeListener(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) {
List<String> suggest = new ArrayList<>();
for(String search:suggestList){
if(search.toLowerCase().contains(materialSearchBar.getText().toLowerCase()))
suggest.add(search);
}
materialSearchBar.setLastSuggestions(suggest);
}
#Override
public void afterTextChanged(Editable s) {
}
});
materialSearchBar.setOnSearchActionListener(new MaterialSearchBar.OnSearchActionListener() {
#Override
public void onSearchStateChanged(boolean enabled) {
if(!enabled) {
// recyclerView.setAdapter(adapter);
//if close Search, just restore default
adapter = new SearchAdapter(getBaseContext(),database.getDaftar());
recyclerView.setAdapter(adapter);
}
}
#Override
public void onSearchConfirmed(CharSequence text) {
startSearch(text.toString());
}
#Override
public void onButtonClicked(int buttonCode) {
}
});
//Init adapter default set all result
adapter = new SearchAdapter(this,database.getDaftar());
}
private void startSearch(String text) {
adapter = new SearchAdapter(this,database.getDataByJudul(text));
recyclerView.setAdapter(adapter);
}
private void loadSuggestList() {
suggestList = database.getJudul();
materialSearchBar.setLastSuggestions(suggestList);
}
}
here's my Daftar.class
package Model;
public class Daftar {
public int id;
public String did, judul, diagnosis;
public Daftar(int id,String did, String judul, String diagnosis) {
this.id = id;
this.did = did;
this.judul = judul;
this.diagnosis = diagnosis;
}
public Daftar() {
}
public int getId() {
return id;
}
public String getDid() {
return did;
}
public void setDid(String did) {
this.did = did;
}
public void setId(int id) {
this.id = id;
}
public String getJudul() {
return judul;
}
public void setJudul(String judul) {
this.judul = judul;
}
public String getDiagnosis() {
return diagnosis;
}
public void setDiagnosis(String diagnosis) {
this.diagnosis = diagnosis;
}
}
Look I don't know what kind of database is this, but I know that you are not receiving the intent extra correctly:
In your isiDiagnosis:
............
//get the did like this
DID = getIntent().getStringExtra("did");
.......
loadData(DID);
//loading the data is up to you according to the database
private void loadData(String did) {.........}
I want to store my data in realm database, then retrieve and show it in a recyclerview. All my code is correct in my point of view but it gives me an error about null pointer exception. Despite my efforts I was unable to solve it.
Main Activty Class
package com.deitel.realmrecyclerviewspinnerpriority;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.deitel.realmrecyclerviewspinnerpriority.Adapter.AdapterClass;
import com.deitel.realmrecyclerviewspinnerpriority.Database.RelmHelper;
import com.deitel.realmrecyclerviewspinnerpriority.Modelclass.ModelClass;
import java.util.ArrayList;
import io.realm.Realm;
import io.realm.RealmConfiguration;
import io.realm.RealmResults;
public class MainActivity extends AppCompatActivity {
private static final String TAG="MainActivity";
Realm realm;
EditText text_name;
EditText text_details;
ImageButton btn_ascending,btn_descending;
RecyclerView rv;
Spinner spinner;
TextView text_data;
Button btn_save,btn_view;
ArrayList<String> itemslist;
AdapterClass addapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text_name = findViewById(R.id.text_name);
text_details = findViewById(R.id.text_details);
text_data=findViewById(R.id.text_data);
btn_save=findViewById(R.id.btn_show);
btn_view=findViewById(R.id.btn_view);
btn_save = findViewById(R.id.btn_show);
rv = findViewById(R.id.recyclerview);
btn_ascending=findViewById(R.id.btn_ascending);
btn_descending=findViewById(R.id.btn_descneding);
rv.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
final RelmHelper helper=new RelmHelper(realm);
itemslist=helper.retrievedata();
addapter = new AdapterClass(MainActivity.this,itemslist);
rv.setAdapter(addapter);
spinner = findViewById(R.id.spinner);
final ArrayList<Integer> arrayList = new ArrayList<>();
arrayList.add(1);
arrayList.add(2);
arrayList.add(3);
arrayList.add(4);
arrayList.add(5);
arrayList.add(6);
arrayList.add(7);
arrayList.add(8);
arrayList.add(9);
arrayList.add(10);
arrayList.add(11);
arrayList.add(12);
arrayList.add(13);
final ArrayAdapter<Integer> adapter = new ArrayAdapter<Integer>(this, android.R.layout.simple_spinner_item, arrayList);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
btn_save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ModelClass md=new ModelClass();
md.setName(text_name.getText().toString());
md.setDetails(text_details.getText().toString());
/*save data*/
RelmHelper helper=new RelmHelper(realm);
helper.savedata(md);
}
});
}
}
```
MY REALM HELPER CLASS
```
package com.deitel.realmrecyclerviewspinnerpriority.Database;
import android.view.Display;
import com.deitel.realmrecyclerviewspinnerpriority.Modelclass.ModelClass;
import java.util.ArrayList;
import io.realm.Realm;
import io.realm.RealmResults;
public class RelmHelper {
Realm realm;
public RelmHelper(Realm realm) {
this.realm = realm;
}
public void savedata(final ModelClass modelClass){
realm.executeTransactionAsync(new Realm.Transaction() {
#Override
public void execute(Realm realm) {
ModelClass md=realm.copyToRealm(modelClass);
}
});
}
public ArrayList<String> retrievedata(){
ArrayList<String> modelclassdata=new ArrayList<>();
RealmResults<ModelClass> modelClass=realm.where(ModelClass.class).findAll();
for (ModelClass MD:modelClass){
modelclassdata.add(MD.getName());
modelclassdata.add(MD.getDetails());
// modelclassdata.add(MD.getPriority());
}
return modelclassdata;
}
}
```
Model Class
```
package com.deitel.realmrecyclerviewspinnerpriority.Modelclass;
import io.realm.RealmObject;
public class ModelClass extends RealmObject {
private String name;
private String details;
// private int priority;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDetails() {
return details;
}
public void setDetails(String details) {
this.details = details;
}
// public int getPriority() {
// return priority;
// }
//
// public void setPriority(int priority) {
// this.priority = priority;
// }
}
```
Adapter Class
```[![enter image description here][1]][1]
package com.deitel.realmrecyclerviewspinnerpriority.Adapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.deitel.realmrecyclerviewspinnerpriority.Modelclass.ModelClass;
import com.deitel.realmrecyclerviewspinnerpriority.R;
import java.util.ArrayList;
import java.util.List;
public class AdapterClass extends RecyclerView.Adapter<AdapterClass.Viewholder> {
ArrayList<String> modelClassList;
Context context;
public AdapterClass(#NonNull Context context,ArrayList<String> modelClassList){
this.modelClassList=modelClassList;
this.context=context;
}
#NonNull
#Override
public AdapterClass.Viewholder onCreateViewHolder(#NonNull ViewGroup viewGroup, int viewType) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.custom_cardview_layout, viewGroup, false);
Viewholder holder = new Viewholder(view);
return holder;
}
#Override
public void onBindViewHolder(#NonNull AdapterClass.Viewholder holder, final int position) {
holder.textView_name.setText("Name :" + modelClassList.get(position));
holder.textView_details.setText("Details : " + modelClassList.get(position));
// holder.textView_priority.setText("Priority : " + modelClassList.get(position));
// holder.btn_delete.setOnClickListener(new View.OnClickListener() {
// #Override
// public void onClick(View v) {
// modelClassList.remove(position);
// notifyItemRemoved(position);
// notifyItemRangeChanged(position,modelClassList.size());
// notifyDataSetChanged();
// }
// });
}
#Override
public int getItemCount() {
return modelClassList.size();
}
public class Viewholder extends RecyclerView.ViewHolder {
TextView textView_name;
TextView textView_details;
TextView textView_priority;
ImageButton btn_delete;
public Viewholder(#NonNull View view) {
super(view);
textView_name = view.findViewById(R.id.textview_name);
textView_details = view.findViewById(R.id.textview_details);
textView_priority = view.findViewById(R.id.textview_priotity);
btn_delete=view.findViewById(R.id.btn_delete);
}
}
}
I make an application, with CRUD function in Android using Room Database.
When i checked the checkbox like this, Error Pictures 1 i want that application show textview & edittext. But, after i press next button, it won't show textview & edittext based on checked in the checkbox Error Pictures 2 or textview & edittext showed up but that's not based by checkbox isChecked
This is the code :
AdapterTargetIbadah.java
package skripsi.com.ggr.managementibadah.adapter;
import android.arch.persistence.room.Room;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import skripsi.com.ggr.managementibadah.R;
import skripsi.com.ggr.managementibadah.data.factory.AppDatabase;
import skripsi.com.ggr.managementibadah.model.Ibadah;
public class AdapterTargetIbadah extends RecyclerView.Adapter<AdapterTargetIbadah.ViewHolder>{
private ArrayList<Ibadah> targetIbadah;
private Context context;
private AppDatabase db;
public AdapterTargetIbadah(ArrayList<Ibadah> targets, Context ctx) {
targetIbadah = targets;
context = ctx;
db = Room.databaseBuilder(context.getApplicationContext(),
AppDatabase.class, "ibadahdb").allowMainThreadQueries().build();
}
class ViewHolder extends RecyclerView.ViewHolder {
TextView tv_target;
EditText et_Target;
ViewHolder(View itemView) {
super(itemView);
tv_target = itemView.findViewById(R.id.tv_target);
et_Target = itemView.findViewById(R.id.et_Target);
}
}
#Override
public AdapterTargetIbadah.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_target, parent, false);
AdapterTargetIbadah.ViewHolder vh = new ViewHolder(v);
return vh;
}
#Override
public void onBindViewHolder(#NonNull AdapterTargetIbadah.ViewHolder holder, int position) {
Ibadah iba = targetIbadah.get(position);
if (iba.getTargetIbadah()!=null) {
holder.tv_target.setText(iba.getTargetIbadah());
iba.setEtTarget(holder.et_Target.getText().toString());
} else {
targetIbadah.remove(position);
}
}
#Override
public int getItemCount() {
return targetIbadah.size();
}
}
AdapterCheckboxTarget.java
package skripsi.com.ggr.managementibadah.adapter;
import android.arch.persistence.room.Room;
import android.content.Context;
import android.support.annotation.NonNull;
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.CompoundButton;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.HashMap;
import skripsi.com.ggr.managementibadah.R;
import skripsi.com.ggr.managementibadah.data.factory.AppDatabase;
import skripsi.com.ggr.managementibadah.model.Ibadah;
public class AdapterCheckboxTarget extends RecyclerView.Adapter<AdapterCheckboxTarget.ViewHolder> {
private ArrayList<Ibadah> targetIbadah;
private Context context;
private AppDatabase db;
public AdapterCheckboxTarget(ArrayList<Ibadah> targets, Context ctx) {
targetIbadah = targets;
context = ctx;
db = Room.databaseBuilder(context.getApplicationContext(),
AppDatabase.class, "ibadahdb").allowMainThreadQueries().build();
}
class ViewHolder extends RecyclerView.ViewHolder {
CheckBox cbTarget;
ViewHolder(View itemView) {
super(itemView);
cbTarget = itemView.findViewById(R.id.cbTarget);
}
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_targethome, parent, false);
ViewHolder vh = new ViewHolder(v);
return vh;
}
#Override
public void onBindViewHolder(#NonNull final ViewHolder holder, int position) {
final String name = targetIbadah.get(position).getNamaIbadah();
holder.cbTarget.setText(name);
holder.cbTarget.setChecked(targetIbadah.get(position).getStatus());
holder.cbTarget.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (holder.cbTarget.isChecked()) {
targetIbadah.get(position).setStatus(true);
targetIbadah.get(position).setTargetIbadah(targetIbadah.get(position).getNamaIbadah());
Toast.makeText(context, "checklist", Toast.LENGTH_SHORT).show();
} else {
targetIbadah.get(position).setStatus(false);
Toast.makeText(context, "unchecklist", Toast.LENGTH_SHORT).show();
}
}
});
}
#Override
public int getItemCount() {
return targetIbadah.size();
}
}
TargetHome.java ==> Activity using AdapterTargetIbadah.java
package skripsi.com.ggr.managementibadah;
import android.app.Activity;
import android.arch.persistence.room.Room;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Arrays;
import skripsi.com.ggr.managementibadah.adapter.AdapterCheckboxTarget;
import skripsi.com.ggr.managementibadah.adapter.AdapterTargetIbadah;
import skripsi.com.ggr.managementibadah.data.factory.AppDatabase;
import skripsi.com.ggr.managementibadah.model.Ibadah;
public class TargetHome extends AppCompatActivity {
private AppDatabase db;
private RecyclerView.Adapter adapter;
private RecyclerView.LayoutManager layoutManager;
private ArrayList<Ibadah> targetIbadah;
RecyclerView rvTarget;
Button btSimpan;
Context ctx;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.target_ibadah);
setTitle("Target Ibadah");
btSimpan = (Button)findViewById(R.id.btSimpanTarget);
targetIbadah = new ArrayList<>();
db = Room.databaseBuilder(getApplicationContext(),
AppDatabase.class, "ibadahdb").allowMainThreadQueries().build();
rvTarget = findViewById(R.id.rvTar);
rvTarget.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
rvTarget.setLayoutManager(layoutManager);
targetIbadah.addAll(Arrays.asList(db.ibadahDAO().selectAllStatus()));
adapter = new AdapterTargetIbadah(targetIbadah, this);
rvTarget.setAdapter(adapter);
Ibadah ib = new Ibadah();
if (ib.getTargetIbadah()!=null) {
ib.setTvTarget(ib.getTargetIbadah());
ib.setEtTarget("");
db.ibadahDAO().insertCapai(ib);
}
btSimpan.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(MainActivity.getActIntent(TargetHome.this));
}
});
}
public static Intent getActIntent(Activity activity) {
// kode untuk pengambilan Intent
return new Intent(activity, TargetHome.class);
}
}
CheckboxTarget.java ==> Activity using AdapterCheckboxTarget
package skripsi.com.ggr.managementibadah;
import android.app.Activity;
import android.arch.persistence.room.Room;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.List;
import skripsi.com.ggr.managementibadah.adapter.AdapterCatatIbadah;
import skripsi.com.ggr.managementibadah.adapter.AdapterCheckboxTarget;
import skripsi.com.ggr.managementibadah.data.factory.AppDatabase;
import skripsi.com.ggr.managementibadah.model.Ibadah;
public class CheckboxTarget extends AppCompatActivity {
private AppDatabase db;
private RecyclerView.Adapter adapter;
private RecyclerView.LayoutManager layoutManager;
private ArrayList<Ibadah> targetIbadah;
RecyclerView rvCb;
Button btNext;
Context ctx;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.target_home);
setTitle("Target Ibadah");
btNext = (Button) findViewById(R.id.btNextTarget);
targetIbadah = new ArrayList<>();
db = Room.databaseBuilder(getApplicationContext(),
AppDatabase.class, "ibadahdb").allowMainThreadQueries().build();
rvCb = findViewById(R.id.rvTarHome);
rvCb.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
rvCb.setLayoutManager(layoutManager);
targetIbadah.addAll(Arrays.asList(db.ibadahDAO().selectAllStatus()));
adapter = new AdapterCheckboxTarget(targetIbadah, this);
rvCb.setAdapter(adapter);
final Ibadah ibadah = (Ibadah) getIntent().getSerializableExtra("data");
if (ibadah != null) {
Ibadah ib = new Ibadah();
ib.setStatus(ib.status);
db.ibadahDAO().insertTarget(ib);
}
}
public static Intent getActIntent(Activity activity) {
// kode untuk pengambilan Intent
return new Intent(activity, CheckboxTarget.class);
}
}
Ibadah.java ==> Model
package skripsi.com.ggr.managementibadah.model;
import android.arch.persistence.room.ColumnInfo;
import android.arch.persistence.room.Entity;
import android.arch.persistence.room.PrimaryKey;
import java.io.Serializable;
#Entity(tableName = "tibadah")
public class Ibadah implements Serializable {
#PrimaryKey(autoGenerate = true)
public int idIbadah;
#ColumnInfo(name = "nama_ibadah")
public String namaIbadah;
#ColumnInfo(name = "deskripsi_ibadah")
public String deskripsiIbadah;
#ColumnInfo(name = "target_ibadah")
public String targetIbadah;
#ColumnInfo(name = "tv_target")
public String tvTarget;
#ColumnInfo(name = "et_target")
public String etTarget;
#ColumnInfo(name = "et_capaian")
public String etCapaian;
#ColumnInfo(name = "status")
public boolean status;
public String getTvTarget() {
return tvTarget;
}
public void setTvTarget(String tvTarget) {
this.tvTarget = tvTarget;
}
public String getTargetIbadah() {
return targetIbadah;
}
public void setTargetIbadah(String targetIbadah) {
this.targetIbadah = targetIbadah;
}
public String getEtTarget() {
return etTarget;
}
public void setEtTarget(String etTarget) {
this.etTarget = etTarget;
}
public String getEtCapaian() {
return etCapaian;
}
public void setEtCapaian(String etCapaian) {
this.etCapaian = etCapaian;
}
public String getDeskripsiIbadah() {
return deskripsiIbadah;
}
public void setDeskripsiIbadah(String deskripsiIbadah) {
this.deskripsiIbadah = deskripsiIbadah;
}
public int getIdIbadah() {
return idIbadah;
}
public void setIdIbadah(int idIbadah) {
this.idIbadah = idIbadah;
}
public String getNamaIbadah() {
return namaIbadah;
}
public void setNamaIbadah(String namaIbadah) {
this.namaIbadah = namaIbadah;
}
public boolean getStatus() {
return status;
}
public void setStatus(boolean status) {
this.status = status;
}
}
I hope, you can help me. Thank you very much & sorry for my bad english.
First you have to set your TextView and EditText invisible in your XML, by adding android:visibility="invisible" to the XML of your TextView and EditText.
Then you have to use setVisibility(View.VISIBLE) after you have set the checkbox, like this:
yourcheckbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
if (b) {
//if checkbox is checked (b == true)
yourTextView.setVisibility(View.VISIBLE);
yourEditText.setVisibility(View.VISIBLE);
}
if (!b) {
//if checkbox is not checked (b == false)
yourTextView.setVisibility(View.INVISIBLE);
yourEditText.setVisibility(View.INVISIBLE);
}
}
});
If you first want to click a button and then check weather checkbox is checked, add this to your OnClickListenter:
if (yourcheckbox.isChecked) {
yourTextView.setVisibility(View.VISIBLE);
yourEditText.setVisibility(View.VISIBLE);
}