RecyclerView ক্লাসটি ViewGroup ক্লাসকে প্রসারিত করে এবং ScrollingView ইন্টারফেস প্রয়োগ করে। এটি মার্শম্যালোতে চালু করা হয়েছে। এটি উন্নত কর্মক্ষমতা এবং অন্যান্য সুবিধা সহ ListView এর একটি উন্নত সংস্করণ। রিসাইক্লারভিউ বেশিরভাগই অ্যান্ড্রয়েড অ্যাপ্লিকেশনের তালিকা এবং গ্রিডগুলির উপর সূক্ষ্ম-শস্য নিয়ন্ত্রণ সহ ব্যবহারকারীর ইন্টারফেস ডিজাইন করতে ব্যবহৃত হয়।
01 Step ( Add Library For Dependencies) build.gradle
implementation "androidx.recyclerview:recyclerview:1.2.1"implementation "androidx.cardview:cardview:1.0.0"
02 Step ( Create item View Layout) \app\src\main\res\layout\Itemview.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:background="@color/black" android:layout_height="wrap_content" android:orientation="horizontal" android:padding="10dp"> <TextView android:padding="10dp" android:id="@+id/tvAnimalName" android:textColor="@color/white" android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="20sp"/></LinearLayout>
03 Step (Create Adapter Class ) \app\src\main\java\com\app\MyRecyclerViewAdapter.java
public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> { private List<String> mData; private LayoutInflater mInflater; private ItemClickListener mClickListener; // data is passed into the constructor MyRecyclerViewAdapter(Context context, List<String> data) { this.mInflater = LayoutInflater.from(context); this.mData = data; } // inflates the row layout from xml when needed @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = mInflater.inflate(R.layout.row_design, parent, false); return new ViewHolder(view); } // binds the data to the TextView in each row @Override public void onBindViewHolder(ViewHolder holder, int position) { String animal = mData.get(position); holder.myTextView.setText(animal); } // total number of rows @Override public int getItemCount() { return mData.size(); } // stores and recycles views as they are scrolled off screen public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener { TextView myTextView; ViewHolder(View itemView) { super(itemView); myTextView = itemView.findViewById(R.id.tvAnimalName); itemView.setOnClickListener(this); } @Override public void onClick(View view) { if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition()); } } // convenience method for getting data at click position String getItem(int id) { return mData.get(id); } // allows clicks events to be caught void setClickListener(ItemClickListener itemClickListener) { this.mClickListener = itemClickListener; } // parent activity will implement this method to respond to click events public interface ItemClickListener { void onItemClick(View view, int position); }}04 Step (Layout your View) \app\src\main\res\layout\activity_main.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="match_parent"> <androidx.recyclerview.widget.RecyclerView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/rvAnimals"/></RelativeLayout>
05 Step (Java Activity your View) \app\src\main\java\com\app\MainActivity.java
public class MainActivity extends AppCompatActivity implements MyRecyclerViewAdapter.ItemClickListener { MyRecyclerViewAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // data to populate the RecyclerView with ArrayList<String> animalNames = new ArrayList<>(); animalNames.add("BD124.com"); animalNames.add("isoftq.com"); animalNames.add("Ohidulfb.com"); animalNames.add("Facebook.com"); animalNames.add("Banglank.com"); animalNames.add("Kotalipara.com"); animalNames.add("codestar.com.bd"); // set up the RecyclerView RecyclerView recyclerView = findViewById(R.id.rvAnimals); recyclerView.setLayoutManager(new LinearLayoutManager(this)); adapter = new MyRecyclerViewAdapter(this, animalNames); adapter.setClickListener(this); recyclerView.setAdapter(adapter); } @Override public void onItemClick(View view, int position) { Toast.makeText(this, "You clicked " + adapter.getItem(position) + " on row number " + position, Toast.LENGTH_SHORT).show(); }}