Develop Reference

How can I set text in another TextView in RecyclerView

I created a RecyclerView adapter. And when I add a new item I need to set the text in two TextView. In the first TextView(android:id="#+id/text") I can set text without any problem. How could I set text in TextView(android:id="#+id/textCost") by methot:
private double SumCost(String result){
switch (result){
case "4820049490145":
return 2.34;
default: return 0;
}
}
enter image description here
Because String result I get from ScanPage.Thanks for any help.
My full code:
activity_scan_page.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical"
android:padding="10dp">
<TextView
android:id="#+id/SumText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="0.00"
android:textSize="30sp"/>
<Button
android:id="#+id/scanBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Scan now"
android:textSize="30sp"
android:layout_gravity="center_horizontal"/>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
</LinearLayout>
item.xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_margin="10dp"
app:cardCornerRadius="10dp"
app:cardElevation="5dp"
app:contentPadding="5dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:text="#string/app_name"
android:textSize="20sp" />
<TextView
android:id="#+id/textCost"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/text"
android:text="#string/app_name"
android:textSize="20sp" />
<Button
android:id="#+id/delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_marginTop="3dp"
android:layout_marginEnd="3dp"
android:text="Delete" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
ScanPage.java (I get IntentResult result here, and set android:id="#+id/text" by items.add(result);):
package com.example.scanapp;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.app.ActionBar;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;
import java.util.LinkedList;
import java.util.List;
public class ScanPage extends AppCompatActivity implements View.OnClickListener{
Button scanBtn;
TextView editText;
List<String> items = new LinkedList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scan_page);
scanBtn = findViewById(R.id.scanBtn);
scanBtn.setOnClickListener(this);
}
public void AddItem(String result){
RecyclerView recyclerView = findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
DemoAdapter adapter = new DemoAdapter(items);
recyclerView.setAdapter(adapter);
items.add(result);
}
#Override
public void onClick(View view) {
scanCode();
}
private void scanCode(){
IntentIntegrator integrator = new IntentIntegrator(this);
integrator.setCaptureActivity(CaptureAct.class);
integrator.setOrientationLocked(false);
integrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);
integrator.setPrompt("Scanning code");
integrator.initiateScan();
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if(result != null){
if(result.getContents() != null){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(result.getContents());
builder.setTitle("Scanning Result");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.cancel();
///
AddItem(result.getContents());
///
editText = (TextView) findViewById(R.id.SumText);
editText.setText(Cost(SumCost(result.getContents())));
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
else {
Toast.makeText(this,"No result", Toast.LENGTH_LONG).show();
}
}
else {
super.onActivityResult(requestCode, resultCode, data);
}
}
////////
double SumVar = 0;
private double SumCost(String result){
switch (result){
case "4820049490145":
return 2.34;
default: return 0;
}
}
private String Cost(double cost){
SumVar += cost;
return Double.toString(SumVar);
}
////////
}
DemoAdapter.java:
package com.example.scanapp;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class DemoAdapter extends RecyclerView.Adapter<DemoVH>{
List<String> items;
public DemoAdapter(List<String> items){
this.items = items;
}
#NonNull
#Override
public DemoVH onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item, parent, false);
return new DemoVH(view).linkAdapter(this);
}
#Override
public void onBindViewHolder(#NonNull DemoVH holder, int position) {
holder.textView.setText(items.get(position));
}
#Override
public int getItemCount() {
return items.size();
}
}
class DemoVH extends RecyclerView.ViewHolder{
TextView textView;
private DemoAdapter adapter;
public DemoVH(#NonNull View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.text);
itemView.findViewById(R.id.delete).setOnClickListener(view -> {
adapter.items.remove(getAdapterPosition());
adapter.notifyItemRemoved(getAdapterPosition());
});
}
public DemoVH linkAdapter(DemoAdapter adapter){
this.adapter = adapter;
return this;
}
}

You must call notifyItemInserted() in your AddItem() method:
...
items.add(result);
notifyItemInserted(position)
}

RecylerView does not list items in order when added dynamicly after 3rd item added

I have a button that says ADD ITEM.
Below there is a RECYCLERVIEW.
When you click on ADD ITEM it adds an EDITVIEW to the recycler view. You type text in it, and then click on ADD ITEM again and it adds another EDITVIEW to the recyler view.
Everything is in the right order.
When you click on ADD ITEM for the 4th time, instead of adding at the 4th position, it adds at the 1st position and moves the previous 3 items down 1.
What could be causing this?
Main Activity
package com.app.bowling.animalsrecycler;
import android.app.Activity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import java.util.ArrayList;
import static java.sql.Types.NULL;
public class MainActivity extends Activity implements RemoveClickListner{
private RecyclerView mRecyclerView;
private RecyclerAdapter mRecyclerAdapter;
private RecyclerView.LayoutManager mLayoutManager;
Button btnAddItem;
ArrayList<RecyclerData> myList = new ArrayList<>();
EditText etTitle;
String title = "";
ImageView crossImage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = findViewById(R.id.recycler_view);
mRecyclerAdapter = new RecyclerAdapter(myList,this);
mRecyclerView.setLayoutManager(new GridLayoutManager(this,2));
mRecyclerView.setAdapter(mRecyclerAdapter);
etTitle = (EditText) findViewById(R.id.etTitle);
if (mRecyclerAdapter.getItemCount() == 0 || mRecyclerAdapter.getItemCount() == NULL){
Toast.makeText(getApplicationContext(),"ZERO ITEMS LISTED",Toast.LENGTH_SHORT).show();
}
btnAddItem = (Button) findViewById(R.id.btnAddItem);
btnAddItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
title = etTitle.getText().toString();
// if (title.matches("")) {
// Toast.makeText(v.getContext(), "You did not enter a Title", Toast.LENGTH_SHORT).show();
// return;
// }
RecyclerData mLog = new RecyclerData();
// mLog.setTitle(title);
myList.add(mLog);
mRecyclerAdapter.notifyData(myList);
etTitle.setText("");
if (mRecyclerAdapter.getItemCount() > 0) {
Toast.makeText(v.getContext(), mRecyclerAdapter.getItemCount() + " Items Displayed", Toast.LENGTH_SHORT).show();
return;
}
}
});
}
#Override
public void OnRemoveClick(int index) {
myList.remove(index);
mRecyclerAdapter.notifyData(myList);
}
}
RecyclerAdapter
package com.app.bowling.animalsrecycler;
import android.support.constraint.ConstraintLayout;
import android.support.v7.widget.RecyclerView;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.RecyclerItemViewHolder> {
private ArrayList<RecyclerData> myList;
int mLastPosition = 0;
private RemoveClickListner mListner;
public RecyclerAdapter(ArrayList<RecyclerData> myList,RemoveClickListner listner) {
this.myList = myList;
mListner=listner;
}
public RecyclerItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_item, parent, false);
RecyclerItemViewHolder holder = new RecyclerItemViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(RecyclerItemViewHolder holder, final int position) {
Log.d("onBindViewHolder ", myList.size() + "");
mLastPosition = position;
holder.crossImage.setImageResource(R.drawable.ic_add_circle_black_24dp);
holder.etTitleTextView.setHint("Enter Player " + (position + 1));
holder.etTitleTextView.requestFocus();
}
#Override
public int getItemCount() {
return(null != myList?myList.size():0);
}
public void notifyData(ArrayList<RecyclerData> myList) {
Log.d("notifyData ", myList.size() + "");
this.myList = myList;
notifyDataSetChanged();
}
public class RecyclerItemViewHolder extends RecyclerView.ViewHolder {
private final TextView etTitleTextView;
private ConstraintLayout mainLayout;
public ImageView crossImage;
public RecyclerItemViewHolder(final View parent) {
super(parent);
etTitleTextView = parent.findViewById(R.id.txtTitle);
etTitleTextView.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) {
myList.get(getAdapterPosition()).setTitle(etTitleTextView.getText().toString());
}
#Override
public void afterTextChanged(Editable s) {
}
});
crossImage = (ImageView) parent.findViewById(R.id.crossImage);
mainLayout = (ConstraintLayout) parent.findViewById(R.id.mainLayout);
mainLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(itemView.getContext(), "Position:" + Integer.toString(getPosition()), Toast.LENGTH_SHORT).show();
}
});
crossImage.setOnClickListener(new AdapterView.OnClickListener() {
#Override
public void onClick(View view) {
mListner.OnRemoveClick(getAdapterPosition()
);
}
});
}
}
RecyclerData
package com.app.bowling.animalsrecycler;
import android.support.v7.widget.RecyclerView;
import android.widget.ImageView;
public class RecyclerData {
String title;
RecyclerView data;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public void setCrossImage(ImageView crossImage){
setCrossImage(crossImage);
}
}
RemoveClickLstner
package com.app.bowling.animalsrecycler;
public interface RemoveClickListner {
void OnRemoveClick(int index);
}
Activity_Main
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:padding="16dp"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Title"
android:id="#+id/etTitle" />
<Button
android:id="#+id/btnAddItem"
android:text="Add Item"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#dbfffe" />
</LinearLayout>
RecyclerView_Item
<LinearLayout 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:orientation="horizontal"
android:layout_width="match_parent"
android:layout_margin="8dp"
android:id="#+id/cardview"
android:layout_height="112dp">
<android.support.constraint.ConstraintLayout
android:id="#+id/mainLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="#+id/txtTitle"
android:maxLines="1"
android:inputType="text"
android:maxLength="15"
android:layout_width="273dp"
android:layout_height="56dp"
android:layout_marginEnd="122dp"
android:layout_marginBottom="56dp"
android:padding="12dp"
android:textColor="#android:color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_conversion_absoluteHeight="0dp"
tools:layout_conversion_absoluteWidth="0dp"
tools:layout_conversion_wrapHeight="0"
tools:layout_conversion_wrapWidth="0" />
<ImageView
android:id="#+id/crossImage"
android:layout_width="136dp"
android:layout_height="112dp"
android:layout_marginStart="273dp"
android:background="#drawable/ic_add_circle_black_24dp"
android:paddingLeft="10dp"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_conversion_absoluteHeight="0dp"
tools:layout_conversion_absoluteWidth="0dp"
tools:layout_conversion_wrapHeight="0"
tools:layout_conversion_wrapWidth="0" />
</android.support.constraint.ConstraintLayout>
</LinearLayout>

Just try to replace your below snippet
myList.add(mLog);
mRecyclerAdapter.notifyData(myList);
etTitle.setText("");
Add this:
myList.add(mLog);
mRecyclerAdapter.addAll(myList);
mRecyclerAdapter.notifyDataSetChanged();
etTitle.setText("");

I would like to see your layout activity_main and recycler_view item because I have tried implementing your code with few twist and the code is working well please check the code below
https://github.com/muchbeer/StackOverflowRecyclerView
Please find the below Screen Shot
Kindy let me if this was your intended application

how to make a dialog pop up after the list view reach a specific integer?

i have a recyclerview with a textview inside it that accept integers only from an edittext and a button that outside the recyclerview and everytime i add an integer to the recyclerview it gets added to the one before that.
so i want a set a dialog after it reach a 2000 or higher and the dialog should be asking if i want to recreate the activity or move to another activity.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.brecyclerview.MainActivity"
android:orientation="vertical">
<EditText
android:id="#+id/edit_ten"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Score"
android:inputType="numberSigned|number" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="#+id/btn_add"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:onClick="btn_add"
android:text="Add"
android:enabled="false"
tools:ignore="OnClick" />
<Button
android:id="#+id/btn_undo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:onClick="btn_undo"
android:text="Undo"
tools:ignore="OnClick" />
<Button
android:id="#+id/btn_new"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:onClick="btn_new"
android:text="New Game" />
</LinearLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recycleViewContainer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
tools:itemCount="8" />
</LinearLayout>
list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:id="#+id/singleRow"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp">
<ImageView
android:id="#+id/userImg"
android:src="#mipmap/ic_launcher"
android:layout_width="60dp"
android:layout_height="60dp" />
<TextView
android:id="#+id/pNametxt"
android:text="User Name"
android:textSize="20sp"
android:layout_marginTop="6dp"
android:maxLines="1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/userImg"
android:layout_toEndOf="#+id/userImg"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp" />
</RelativeLayout>
<View
android:layout_below="#+id/singleRow"
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#f2f2f2" />
</RelativeLayout>
MainActivity.java
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.DataSetObserver;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
int total = 0;
Button button;
Button button1;
Button button2;
EditText editText;
TextView personName;
RecyclerView recyclerView;
RecyclerView.Adapter mAdapter;
RecyclerView.LayoutManager layoutManager;
List<PersonUtils> personUtilsList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.btn_add);
button1 = (Button) findViewById(R.id.btn_undo);
button2 = (Button) findViewById(R.id.btn_new);
editText = (EditText) findViewById(R.id.edit_ten);
personName = (TextView) findViewById(R.id.pNametxt);
recyclerView = (RecyclerView) findViewById(R.id.recycleViewContainer);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(layoutManager);
personUtilsList = new ArrayList<>();
mAdapter = new CustomRecyclerAdapter(this, personUtilsList);
editText.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
#Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
String addvalue = editText.getText().toString().trim();
button.setEnabled(!addvalue.isEmpty());
}
#Override
public void afterTextChanged(Editable editable) {
}
});
button2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (v == button2) {
recreate();
}}});
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
for (int i = 0; i < personUtilsList.size(); i++) {
total = personUtilsList.get(i).getPersonName();
}
total += Integer.parseInt(editText.getText().toString());
personUtilsList.add(new PersonUtils(total));
recyclerView.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
editText.setText("");
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int position = mAdapter.getItemCount() -1;
removeItem(position);
}
});
}
public void removeItem(int position) {
if(position <= 0)
{ recreate();
}
else if(position == mAdapter.getItemCount() - 1)
{personUtilsList.remove(position);
mAdapter.notifyItemRemoved(position);
}
else
{
}
}
});}}
CustomRecyclerAdapter.java
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import androidx.recyclerview.widget.RecyclerView;
import java.util.List;
public class CustomRecyclerAdapter extends RecyclerView.Adapter<CustomRecyclerAdapter.ViewHolder> {
private Context context;
private static List<PersonUtils> personUtils;
public CustomRecyclerAdapter(Context context, List personUtils) {
this.context = context;
this.personUtils = personUtils;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.itemView.setTag(personUtils.get(position));
PersonUtils pu = personUtils.get(position);
holder.pName.setText(String.valueOf(pu.getPersonName()));
}
#Override
public int getItemCount() {
return (personUtils.size()>8)?8:personUtils.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder{
public TextView pName;
final Button deleteButton;
public ViewHolder(final View itemView) {
super(itemView);
pName = (TextView) itemView.findViewById(R.id.pNametxt);
deleteButton = (Button) itemView.findViewById(R.id.btn_undo);
}}}
PersonUtils.java
public class PersonUtils {
private Integer personName;
public Integer getPersonName() {
return personName;
}
public void setPersonName(Integer personName) {
this.personName = personName;
}
public PersonUtils(Integer personName) {
this.personName = personName;
}
}
i want a set a dialog after it reach a 2000 or higher and the dialog should be asking if i want to recreate the activity or move to another activity.

In your RecyclerView add ScrollListener to listen scroll event. Please check below:
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
#Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (newState == RecyclerView.SCROLL_STATE_IDLE) {
int position = ((LinearLayoutManager)recyclerView.getLayoutManager()).findLastVisibleItemPosition();
if(position == 2000) {
//ToDo: Whatever you want to do
}
}
}
});

Items in the RecyclerView are not showing

List_items are not showing in the RecyclerView.
Have tried changing the layout height and other answers.
The list_items should contain
-item_name
-item_quantity
-date
So basically after entering the respective dataset in an AlertDialog and after clicking the save button, the ListActivity will show up. But a Blank Screen is showing up not containing the list_items within the CardView.
Here's the ListActivity
package com.example.akash.distributedapp.DatabaseApp.Activities;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.View;
import com.example.akash.distributedapp.DatabaseApp.Data.DatabaseHandler;
import com.example.akash.distributedapp.DatabaseApp.Model.Grocery;
import com.example.akash.distributedapp.DatabaseApp.UI.RecyclerViewAdapter;
import com.example.akash.distributedapp.R;
import java.util.ArrayList;
import java.util.List;
public class ListActivity extends AppCompatActivity {
private DatabaseHandler db;
private RecyclerView recyclerView;
private List<Grocery> groceryList;
private List<Grocery> listItems;
private RecyclerViewAdapter recyclerViewAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
db = new DatabaseHandler(this);
recyclerView = findViewById(R.id.recyclerViewID);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
groceryList = new ArrayList<>();
listItems = new ArrayList<>();
//get items from database
groceryList = db.getAllGroceries();
for(Grocery c : groceryList){
Grocery grocery = new Grocery();
grocery.setName(c.getName());
grocery.setQuantity("Qty:" + c.getQuantity());
grocery.setId(c.getId());
grocery.setDateItemAdded("Added on: " + c.getDateItemAdded());
listItems.add(grocery);
}
recyclerViewAdapter = new RecyclerViewAdapter(this, listItems);
recyclerView.setAdapter(recyclerViewAdapter);
recyclerViewAdapter.notifyDataSetChanged();
}
}
Here's the adapter class
package com.example.akash.distributedapp.DatabaseApp.UI;
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.Button;
import android.widget.TextView;
import com.example.akash.distributedapp.DatabaseApp.Model.Grocery;
import com.example.akash.distributedapp.R;
import java.util.List;
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>{
private Context context;
private List<Grocery> groceryItems;
public RecyclerViewAdapter(Context context, List<Grocery> groceryItems) {
this.context = context;
this.groceryItems = groceryItems;
}
#NonNull
#Override
public RecyclerViewAdapter.ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_row, parent, false);
return new ViewHolder(view, context);
}
#Override
public void onBindViewHolder(#NonNull RecyclerViewAdapter.ViewHolder holder, int position) {
Grocery grocery = groceryItems.get(position);
holder.groceryItemName.setText(grocery.getName());
holder.quantity.setText(grocery.getQuantity());
holder.quantity.setText(grocery.getDateItemAdded());
}
#Override
public int getItemCount() {
return groceryItems.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public TextView groceryItemName;
public TextView quantity;
public TextView dateAdded;
public Button editBtn;
public Button deleteBtn;
public int id;
public ViewHolder(View itemView, Context ctx) {
super(itemView);
context = ctx;
groceryItemName = itemView.findViewById(R.id.tv_item);
quantity = itemView.findViewById(R.id.tv_qty);
dateAdded = itemView.findViewById(R.id.tv_date);
editBtn = itemView.findViewById(R.id.btn_edit);
deleteBtn = itemView.findViewById(R.id.btn_delete);
editBtn.setOnClickListener(this);
deleteBtn.setOnClickListener(this);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//opens new activity
}
});
}
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btn_edit:
break;
case R.id.btn_delete:
break;
}
}
}
}
Here is my XML file :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="125dp"
android:padding="5dp">
<android.support.v7.widget.CardView
android:id="#+id/cardView"
android:background="#color/colorAccent"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:padding="15dp"
android:background="#color/colorAccent"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/tv_item"
android:text="Grocery name"
android:textSize="18sp"
android:textStyle="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/tv_qty"
android:layout_below="#+id/tv_item"
android:text="Quantity"
android:paddingTop="5dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/tv_date"
android:paddingTop="5dp"
android:text="Date"
android:layout_below="#+id/tv_qty"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TableRow
android:layout_alignParentRight="true"
android:layout_marginTop="15dp"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<Button
android:id="#+id/btn_edit"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginRight="15dp"
android:background="#android:drawable/ic_menu_edit"/>
<Button
android:id="#+id/btn_delete"
android:layout_width="30dp"
android:layout_height="30dp"
android:background="#android:drawable/ic_delete"/>
</TableRow>
</RelativeLayout>
</android.support.v7.widget.CardView>
</LinearLayout>

onItemClick not working for Card View

It uses retrofit 2.0 to fetch the data from the webservice and bind it to the card view. When I click on the card view having image and textviews, on click is not triggering, rather a strange behaviour is at the very corner edges of the card view onclick is triggering.
Item_row.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
card_view:cardCornerRadius="1dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="8dp"
android:layout_margin="5dp"
android:clickable="true">
<ImageView
android:id="#+id/flowerImage"
android:layout_width="match_parent"
android:layout_height="200dp"
android:focusable="true"
android:clickable="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:visibility="visible"/>
<ImageButton
android:id="#+id/favIcon"
android:layout_width="32dp"
android:layout_height="32dp"
android:scaleType="fitXY"
android:layout_margin="5dp"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:descendantFocusability="blocksDescendants"
android:background="#drawable/ic_favorite_border"
android:focusable="true"
android:clickable="true"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/flowerImage"
android:orientation="vertical"
>
<TextView
android:id="#+id/flowerName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Medium Text"
android:textColor="#color/colorPrimary"
android:textAppearance="?android:attr/textAppearanceMedium"
android:focusable="true"
android:clickable="true"
android:visibility="visible"/>
<TextView
android:id="#+id/flowerCategory"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Small Text"
android:layout_alignBottom="#id/flowerName"
android:textAppearance="?android:attr/textAppearanceSmall"
android:focusable="true"
android:clickable="true"
android:visibility="visible"/>
<TextView
android:id="#+id/flowerPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#id/flowerCategory"
android:text="New Text"
android:focusable="true"
android:clickable="true"
android:visibility="visible"/>
<TextView
android:id="#+id/flowerInstruction"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
android:text="New Text"
android:focusable="true"
android:clickable="true"/>
</LinearLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
Content_main.xml
Layout file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_margin="8dp"
tools:context=".MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"/>
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>
</LinearLayout>
Main Activity Layout file
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay"
android:elevation="8dp"/>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="#dimen/fab_margin"
android:src="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
The code base is following MVC design pattern. Controller does the job of getting the web service data
MainActivity.java
package com.innovation.myapp.jwelleryonrent.View;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.Toast;
import com.innovation.myapp.jwelleryonrent.R;
import com.innovation.myapp.jwelleryonrent.controller.jwelleryController;
import com.innovation.myapp.jwelleryonrent.model.adapter.CustomItemClickListner;
import com.innovation.myapp.jwelleryonrent.model.adapter.JwelleryAdapter;
import com.innovation.myapp.jwelleryonrent.model.pojo.JwelleryCollection;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements jwelleryController.JwelleryCallbackListener {
private Toolbar mToolbar;
private RecyclerView mRecyclerView;
private SwipeRefreshLayout mSwipeRefreshLayout;
private List<JwelleryCollection> mJwelleryList = new ArrayList<>();
private JwelleryAdapter mJwelleryAdapter;
private jwelleryController mController;
private boolean isInFavourites = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
configToolbar();
mController = new jwelleryController(MainActivity.this);
configViews();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View rootView = inflater.inflate(R.layout.item_row, container, false);
ImageButton imgBtn = (ImageButton) findViewById(R.id.favIcon);
imgBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
addItemToBag(v);
}
});
return rootView;
}
private void addItemToBag(View v)
{
isInFavourites = true;
ImageButton btnFaviourite = (ImageButton) findViewById(R.id.favIcon);
if(isInFavourites==true) {
btnFaviourite.setImageResource(R.drawable.ic_favorite_white_24dp);
}
else
btnFaviourite.setImageResource(R.drawable.ic_favorite_border);
Snackbar.make(v, "Item added to Favourites", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
private void configToolbar() {
mToolbar = (Toolbar) this.findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
}
private void initializeAdapter()
{
mJwelleryAdapter = new JwelleryAdapter(mJwelleryList, new CustomItemClickListner() {
#Override
public void onItemClick(View v, int position) {
Toast.makeText(MainActivity.this, "Clicked Item: "+position,Toast.LENGTH_LONG).show();
}
});
mRecyclerView.setAdapter(mJwelleryAdapter);
mSwipeRefreshLayout.setColorSchemeColors(getResources().getColor(R.color.colorAccent),
getResources().getColor(R.color.colorPrimary),
getResources().getColor(R.color.colorPrimaryDark));
mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
mController.startFetching();
}
});
}
private void configViews() {
mRecyclerView = (RecyclerView) this.findViewById(R.id.list);
mSwipeRefreshLayout = (SwipeRefreshLayout) this.findViewById(R.id.swipe);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
mRecyclerView.setRecycledViewPool(new RecyclerView.RecycledViewPool());
mController.startFetching();
initializeAdapter();
// mJwelleryAdapter= new JwelleryAdapter(mJwelleryList);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onFetchStart() {
}
#Override
public void onFetchProgress(JwelleryCollection jwellery) {
mJwelleryAdapter.addJwellery(jwellery);
}
#Override
public void onFetchProgress(List<JwelleryCollection> jwelleryList) {
}
#Override
public void onFetchComplete() {
mSwipeRefreshLayout.setRefreshing(false);
}
#Override
public void onFetchFailure() {
}
}
Recycler view uses the adapter view holder pattern to initialize the adapter
JwelleryAdapter class
package com.innovation.myapp.jwelleryonrent.model.adapter;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.innovation.myapp.jwelleryonrent.R;
import com.innovation.myapp.jwelleryonrent.View.MainActivity;
import com.innovation.myapp.jwelleryonrent.model.pojo.JwelleryCollection;
import com.innovation.myapp.jwelleryonrent.model.utilities.Constants;
import com.squareup.picasso.Picasso;
import java.util.List;
/**
*
*/
public class JwelleryAdapter extends RecyclerView.Adapter<JwelleryAdapter.Holder> {
private List<JwelleryCollection> mJwelleryCollection;
CustomItemClickListner itemListner;
Context mContext;
public JwelleryAdapter(List<JwelleryCollection> jwellery) {
mJwelleryCollection = jwellery;
}
public JwelleryAdapter( List<JwelleryCollection> jwellery,CustomItemClickListner listner) {
mJwelleryCollection = jwellery;
this.itemListner = listner;
}
#Override
public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
View row = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_row,parent,false);
final Holder mViewHolder = new Holder(row);
row.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
itemListner.onItemClick(v,mViewHolder.getPosition());
}
});
return mViewHolder;
}
#Override
public void onBindViewHolder(JwelleryAdapter.Holder holder, int position) {
JwelleryCollection currentJwellery = mJwelleryCollection.get(position);
holder.mName.setText(currentJwellery.mName);
holder.mCategory.setText(currentJwellery.mCategory);
holder.mPrice.setText(Double.toString(currentJwellery.mPrice));
holder.mInstructions.setText(currentJwellery.mInstructions);
Picasso.with(holder.itemView.getContext()).load(Constants.PHOTO_URL + currentJwellery.mPhoto).into(holder.mImage);
}
public void addJwellery(JwelleryCollection jwellery) {
mJwelleryCollection.add(jwellery);
notifyDataSetChanged();
}
#Override
public int getItemCount() {
return mJwelleryCollection.size();
}
public class Holder extends RecyclerView.ViewHolder implements View.OnClickListener {
Context contxt;
public TextView mName, mCategory, mPrice, mInstructions;
public ImageView mImage;
public Holder(View itemView) {
super(itemView);
mImage = (ImageView) itemView.findViewById(R.id.flowerImage);
mName = (TextView) itemView.findViewById(R.id.flowerName);
mCategory = (TextView) itemView.findViewById(R.id.flowerCategory);
mPrice = (TextView) itemView.findViewById(R.id.flowerPrice);
mInstructions = (TextView) itemView.findViewById(R.id.flowerInstruction);
}
public Holder(View itemView,int ViewType,Context c) {
// Creating ViewHolder Constructor with View and viewType As a parameter
super(itemView);
contxt = c;
itemView.setClickable(true);
itemView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
Toast.makeText(contxt, "The Item Clicked is: " + getPosition(), Toast.LENGTH_SHORT).show();
}
}
}
CustomerItemClickListner Interface to handle row item on click
package com.innovation.myapp.jwelleryonrent.model.adapter;
import android.view.View;
/**
*
*/
public interface CustomItemClickListner {
public void onItemClick(View v,int position);
}

First create one variable of your interface in your adapter:
CustomItemClickListener mListener;
then like you have set in your OnClick() method:
if (mListener != null) {
mListener.onItemClick(v, getAdapterPosition());
}
and the last thing you need to modify in your adapter is creating new method which you will call later in your activity class for handling listener:
public void setOnItemClickListener(CustomItemClickListener listener) {
mListener = listener;
}
now you can call this method in your activity like this:
adapter.setOnItemClickListener(this); // implement interface
// or
adapter.setOnItemClickListener(new CustomItemClickListener());