Pass Edit Text Content To RecyclerView in Next Activity

Question

I am passing the EditText values from one activity to another Activity that contains RecyclerView. But i got a problem which remains Unsolvable for me.

My main.xml contains Edit text field and add Button. On click of add Button the Edit Text value should pass to RecyclerView in next XML.

This is my Main Activity:

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
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.Toast;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
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.Toast;

 public class MainActivity extends ActionBarActivity {

private RecyclerView myRecyclerView;
private LinearLayoutManager linearLayoutManager;
private RecyclerViewAdapter myRecyclerViewAdapter;

EditText nameField;
Button btnAdd;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    myRecyclerView = (RecyclerView) findViewById(R.id.myrecyclerview);

    nameField = (EditText) findViewById(R.id.namefield);
    btnAdd = (Button) findViewById(R.id.addbutton);
    btnAdd.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            /*String newName = nameField.getText().toString();*/
            Intent i = new Intent(getApplicationContext(), ListFromMain.class);
            startActivity(i);
            /*myRecyclerViewAdapter.add(0,newName);
            Toast.makeText(MainActivity
                    .this,"You added" +newName.toUpperCase()+ "in your view",Toast.LENGTH_LONG).show();*/

        }
    });
}

}

My Recycler Adapter

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ItemHolder> {

private List<String> itemsName;
private OnItemClickListener onItemClickListener;
private LayoutInflater layoutInflater;

public RecyclerViewAdapter(Context context){
    layoutInflater = LayoutInflater.from(context);
    itemsName = new ArrayList<String>();
}

@Override
public RecyclerViewAdapter.ItemHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = layoutInflater.inflate(R.layout.text_view,parent, false);
    return new ItemHolder(itemView, this);
}

@Override
public void onBindViewHolder(RecyclerViewAdapter.ItemHolder holder, int position) {
    holder.setItemName(itemsName.get(position));

}

@Override
public int getItemCount() {
    return itemsName.size();
}

public void setOnItemClickListener(OnItemClickListener listener){
    onItemClickListener = listener;
}

public OnItemClickListener getOnItemClickListener(){
    return onItemClickListener;
}

public interface OnItemClickListener{
    public void onItemClick(ItemHolder item, int position);
}

public void add(int location, String iName){
    itemsName.add(location, iName);
    notifyItemInserted(location);
}


public static class ItemHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

    private RecyclerViewAdapter parent;
    TextView textItemName;

    public ItemHolder(View itemView, RecyclerViewAdapter parent) {
        super(itemView);
        itemView.setOnClickListener(this);
        this.parent = parent;
        textItemName = (TextView) itemView.findViewById(R.id.textview);
    }

    public void setItemName(CharSequence name){
        textItemName.setText(name);
    }

    public CharSequence getItemName(){
        return textItemName.getText();
    }

    @Override
    public void onClick(View v) {
        final OnItemClickListener listener = parent.getOnItemClickListener();
        if(listener != null){
            listener.onItemClick(this, getPosition());
        }
    }
}}

ListActivity

public class ListFromMain extends ActionBarActivity implements RecyclerViewAdapter.OnItemClickListener{

private RecyclerView myRecyclerView;
private LinearLayoutManager linearLayoutManager;
private RecyclerViewAdapter myRecyclerViewAdapter;
@Override
protected void onCreate( Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.reycler_list);

    RecyclerView recyclerView = (RecyclerView) findViewById(R.id.myrecyclerview);

    linearLayoutManager =
            new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);

    myRecyclerViewAdapter = new RecyclerViewAdapter(this);

    myRecyclerView.setAdapter(myRecyclerViewAdapter);
    myRecyclerView.setLayoutManager(linearLayoutManager);


}
@Override
public void onItemClick(RecyclerViewAdapter.ItemHolder item, int position) {
    Toast.makeText(this,
            "Remove " + position + " : " + item.getItemName(),
            Toast.LENGTH_SHORT).show();
}}

Main.xml

<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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:orientation="vertical">


<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <EditText
        android:id="@+id/namefield"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>
    <Button
        android:id="@+id/addbutton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Add"/>
</LinearLayout>

Recycler_list.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v7.widget.RecyclerView
    android:id="@+id/myrecyclerview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>
 </LinearLayout>

textview xml

<?xml version="1.0" encoding="utf-8"?>
 <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/textview"/>

The edit text value from main should be displayed in recycler_list.

Answer 1

create a arraylist inside your ListFromMain like:

private ArrayList<String> itemsList;

and inside your onCreate

itemsList = new ArrayList<>();
.
.
myRecyclerViewAdapter = new RecyclerViewAdapter(this, itemsName);

and inside your adapter

public RecyclerViewAdapter(Context context, ArrayList<String> itemsList){
layoutInflater = LayoutInflater.from(context);
this.itemsName = itemsList;
}

Now, when you click on btnAdd inside your MainActivity e.g

btnAdd.setOnClickListener(new View.OnClickListener(){
    @Override
    public void onClick(View v) {

        String newName = nameField.getText().toString();
        Intent intent = new Intent(MainActivity.this, ListFromMain.class);
        intent.putExtra("item_name", newName);
        startActivity(intent);

    }
});

and inside onCreate of ListFromMain activity class

if(getIntent().hasExtra("item_name")) {
itemsList.add(getIntent().getStringExtra("item_name"));
myRecyclerViewAdapter.notifyDataSetChange();
}

Hope it will help you out.

Answer 2

I have removed recyclerview code from here,on click of button you are passing a list of name in the next Activity.

public class MainActivity extends ActionBarActivity implements      
RecyclerViewAdapter.OnItemClickListener{

 EditText nameField;
 Button btnAdd;
 List<String> nameList;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   nameList = new Arraylist<>();

nameField = (EditText)findViewById(R.id.namefield);
btnAdd = (Button)findViewById(R.id.addbutton);
btnAdd.setOnClickListener(new View.OnClickListener(){
    @Override
    public void onClick(View v) {
        String newName = nameField.getText().toString();
        nameList.add(newName);
        Intent i = new Intent(getApplicationContext(),ListFromMain.class);
         intent.putStringArrayListExtra("key",nameList);
         startActivity(intent);
        Toast.makeText(MainActivity
                .this,"You added" +newName.toUpperCase()+ "in your view",Toast.LENGTH_LONG).show();

    }
});
 }

@Override
 public void onItemClick(RecyclerViewAdapter.ItemHolder item, int position) {
   Toast.makeText(this,
        "Remove " + position + " : " + item.getItemName(),
        Toast.LENGTH_SHORT).show();
}}

Here we are setting recyclerview and getting intent from the prvious Activity and setting that list in constructor of Adapter. ListActivity

     public class ListFromMain extends ActionBarActivity{
        private RecyclerView myRecyclerView;
        private LinearLayoutManager linearLayoutManager;
        private RecyclerViewAdapter myRecyclerViewAdapter;
     @Override
      protected void onCreate( Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.reycler_list);
        ArrayList<String> nameList = getIntent().getStringArrayListExtra("key");
          myRecyclerView = (RecyclerView)findViewById(R.id.myrecyclerview);

         linearLayoutManager =
        new LinearLayoutManager(this, LinearLayoutManager.VERTICAL,     false);


          myRecyclerViewAdapter = new RecyclerViewAdapter(this,nameList);
          myRecyclerView.setAdapter(myRecyclerViewAdapter);
          myRecyclerView.setLayoutManager(linearLayoutManager);



   }
}

there is not much change in the adapter just one is there that you initialize your list here from constructor that's it. RecyclerAdaptger

    public class RecyclerViewAdapter extends     RecyclerView.Adapter<RecyclerViewAdapter.ItemHolder> {

  private List<String> itemsName;
  private OnItemClickListener onItemClickListener;
  private LayoutInflater layoutInflater;

 public RecyclerViewAdapter(Context context,ArrayList<String> nameList){
     layoutInflater = LayoutInflater.from(context);
     itemsName = nameList;
  }

   @Override
    public RecyclerViewAdapter.ItemHolder onCreateViewHolder(ViewGroup parent, int viewType) {
     View itemView = layoutInflater.inflate(R.layout.text_view,parent, false);
     return new ItemHolder(itemView, this);
  }

   @Override
    public void onBindViewHolder(RecyclerViewAdapter.ItemHolder holder, int position) {
       holder.setItemName(itemsName.get(position));

   }

   @Override
   public int getItemCount() {
       return itemsName.size();
   }

    public void setOnItemClickListener(OnItemClickListener listener){
         onItemClickListener = listener;
    }

     public OnItemClickListener getOnItemClickListener(){
          return onItemClickListener;
      }

     public interface OnItemClickListener{
           public void onItemClick(ItemHolder item, int position);
    }

    public static class ItemHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

private RecyclerViewAdapter parent;
TextView textItemName;

public ItemHolder(View itemView, RecyclerViewAdapter parent) {
    super(itemView);
    itemView.setOnClickListener(this);
    this.parent = parent;
    textItemName = (TextView) itemView.findViewById(R.id.textview);
}

public void setItemName(CharSequence name){
    textItemName.setText(name);
}

public CharSequence getItemName(){
    return textItemName.getText();
}

@Override
public void onClick(View v) {
    final OnItemClickListener listener = parent.getOnItemClickListener();
    if(listener != null){
        listener.onItemClick(this, getPosition());
    }
}
  }}