How to add dividers and spaces between items in RecyclerView?

This example demonstrate about How to add dividers and spaces between items in RecyclerView

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version = "1.0" encoding = "utf-8"?> <android.support.design.widget.CoordinatorLayout android:layout_width = "match_parent"    android:layout_height = "match_parent"    xmlns:android = "http://schemas.android.com/apk/res/android"    xmlns:app = "http://schemas.android.com/apk/res-auto">    <android.support.design.widget.AppBarLayout       android:layout_width = "match_parent"       android:layout_height = "wrap_content">       <android.support.v7.widget.Toolbar          android:id = "@+id/appbarlayout_tool_bar"          android:background = "@color/colorPrimary"          android:layout_width = "match_parent"          android:layout_height = "?attr/actionBarSize"          app:layout_scrollFlags = "scroll|snap|enterAlways"          app:theme = "@style/ThemeOverlay.AppCompat.Dark.ActionBar"          app:popupTheme = "@style/ThemeOverlay.AppCompat.Light" />    </android.support.design.widget.AppBarLayout>    <android.support.v7.widget.RecyclerView       android:id = "@+id/recycler_view"       android:layout_width = "match_parent"       android:layout_height = "match_parent"       app:layout_behavior = "@string/appbar_scrolling_view_behavior"/> </android.support.design.widget.CoordinatorLayout>

In the above code, we have taken recycerview.

Step 3 − Add the following code to src/MainActivity.java

package com.example.myapplication; import android.annotation.TargetApi; import android.os.Build; import android.os.Bundle; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.DefaultItemAnimator; import android.support.v7.widget.DividerItemDecoration; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.Toolbar; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; public class MainActivity extends AppCompatActivity {    TextView text;    ArrayList<String> list = new ArrayList<>();    private RecyclerView recyclerView;    private customAdapter mAdapter;    private onClickInterface onclickInterface;    @TargetApi(Build.VERSION_CODES.LOLLIPOP)    @Override    public void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       Toolbar toolbar = (android.support.v7.widget.Toolbar) findViewById(R.id.appbarlayout_tool_bar);       toolbar.setTitle("This is toolbar.");       setSupportActionBar(toolbar);       onclickInterface = new onClickInterface() {          @Override          public void setClick(int abc) {             list.remove(abc);             Toast.makeText(MainActivity.this,"Position is"+abc,Toast.LENGTH_LONG).show();             mAdapter.notifyDataSetChanged();          }       };       recyclerView = (RecyclerView) findViewById(R.id.recycler_view);       RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());       recyclerView.setLayoutManager(mLayoutManager);       recyclerView.setItemAnimator(new DefaultItemAnimator());       mAdapter = new customAdapter(this, list, onclickInterface);       recyclerView.setAdapter(mAdapter);       DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(), DividerItemDecoration.VERTICAL);       dividerItemDecoration.setDrawable(ContextCompat.getDrawable(MainActivity.this, R.drawable.divider));       recyclerView.addItemDecoration(dividerItemDecoration);       list.add("sairamm");       list.add("Krishna");       list.add("prasad");       list.add("sairamm");       list.add("Krishna");       list.add("prasad");       list.add("sairamm");       list.add("Krishna");       list.add("prasad");       list.add("sairamm");       list.add("Krishna");       list.add("prasad");       list.add("Krishna");       list.add("prasad");       list.add("sairamm");       list.add("Krishna");       list.add("prasad");       list.add("sairamm");       list.add("Krishna");       list.add("prasad");    } }

Step 4 − Add the following code to src/ customAdapter.java

package com.example.myapplication; 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.TextView; import java.util.ArrayList; public class customAdapter extends RecyclerView.Adapter<customAdapter.MyViewHolder> {    Context context;    ArrayList<String> list;    onClickInterface onClickInterface;    public class MyViewHolder extends RecyclerView.ViewHolder {       public TextView title;       public MyViewHolder(View view) {          super(view);          title = (TextView) view.findViewById(R.id.title);       }    }    public customAdapter(Context context, ArrayList<String> list, onClickInterface onClickInterface) {       this.context = context;       this.list = list;       this.onClickInterface = onClickInterface;    }    @NonNull    @Override    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {       View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_row, viewGroup, false);       return new MyViewHolder(itemView);    }    @Override    public void onBindViewHolder(@NonNull MyViewHolder myViewHolder, final int i) {       myViewHolder.title.setText(list.get(i));       myViewHolder.title.setOnClickListener(new View.OnClickListener() {          @Override          public void onClick(View v) {             onClickInterface.setClick(i);          }       });    }    @Override    public int getItemCount() {       return list.size();    } }

Step 5 − Add the following code to res/layout/ list_row.xml.

<?xml version = "1.0" encoding = "utf-8"?> <android.support.v7.widget.CardView xmlns:android = "http://schemas.android.com/apk/res/android"    xmlns:app = "http://schemas.android.com/apk/res-auto"    xmlns:tools = "http://schemas.android.com/tools"    android:layout_width = "match_parent"    android:layout_height = "wrap_content"    app:cardElevation = "10dp"    app:cardCornerRadius = "20dp"    tools:context = ".MainActivity">    <LinearLayout       android:layout_width = "match_parent"       android:layout_height = "wrap_content"       android:gravity = "center"       android:orientation = "vertical">       <ImageView          android:id = "@+id/imageView2"          android:layout_width = "wrap_content"          android:layout_height = "wrap_content"          android:src = "@drawable/logo" />       <TextView          android:id = "@+id/title"          android:layout_width = "match_parent"          android:layout_height = "wrap_content"          android:gravity = "center"          android:textSize = "30sp" />       <TextView          android:id = "@+id/textview2"          android:layout_width = "match_parent"          android:layout_height = "wrap_content"          android:gravity = "center"          android:text = "Sairamkrishan"          android:textSize = "30sp" />    </LinearLayout> </android.support.v7.widget.CardView>

Step 6 − Add the following code to src/ onClickInterface.

package com.example.myapplication; public interface onClickInterface {    void setClick(int abc); }

Step 7 − Add the following code to res/drawable/ dividerxml.

<?xml version = "1.0" encoding = "utf-8"?> <shape xmlns:android = "http://schemas.android.com/apk/res/android"    android:shape = "rectangle">    <solid android:color = "@color/colorPrimary"/>    <size android:height = "2dp"/> </shape>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –