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How to use GridLayoutManager in RecyclerView?
This example demonstrate about How to use GridLayoutManager 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
<?xml version = "1.0" encoding = "utf-8"?>
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.GridLayoutManager;
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);
GridLayoutManager mLayoutManager = new GridLayoutManager(getApplicationContext(),2);
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
mAdapter = new customAdapter(this, list, onclickInterface);
recyclerView.setAdapter(mAdapter);
DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(), DividerItemDecoration.HORIZONTAL);
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
<?xml version = "1.0" encoding = "utf-8"?>
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.
<?xml version = "1.0" encoding = "utf-8"?>
public interface onClickInterface {
void setClick(int abc);
}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 –
Updated on: 30-Jul-2019
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