How to create dynamic listview in android studio

Today in this post we are going to make a dynamic list and as soon as the dynamic list is clicked we are going to transfer it to another screen. So to start this project first of all you should create a completely fresh project of yours and then after creating the project follow all the steps told by us.

Step : 1

In the code given by us there is a tool bar which is working as title bar and another is recyclerview list in which we are going to create log list. Copy this code given by us and after copying paste this code in activity_men.xml file.

1. Activity (activity_main.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:orientation="vertical" android:padding="1dp"> <Toolbar android:layout_width="match_parent" android:layout_gravity="center" android:background="@color/white" android:layout_height="70dp"> <TextView android:layout_width="wrap_content" android:text="Dynamic List View" android:textColor="@color/black" android:textSize="24dp" android:layout_height="wrap_content"/> </Toolbar> <androidx.recyclerview.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="388dp" android:layout_gravity="center" android:layout_height="wrap_content" android:padding="10dp" /> </LinearLayout>

Step : 2

Copy the code of main_activity.java file in step 2 and after copying paste it in your project.

1.Activity (main_activity.java)

import android.os.Bundle; import androidx.annotation.NonNull; import androidx.appcompat.app.AppCompatActivity; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import com.google.firebase.database.DataSnapshot; import com.google.firebase.database.DatabaseError; import com.google.firebase.database.DatabaseReference; import com.google.firebase.database.FirebaseDatabase; import com.google.firebase.database.ValueEventListener; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private RecyclerView recyclerView; private ItemAdapter itemAdapter; private List<Item> itemList; private DatabaseReference databaseReference; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); recyclerView = findViewById(R.id.recyclerView); recyclerView.setLayoutManager(new LinearLayoutManager(this)); itemList = new ArrayList<>(); itemAdapter = new ItemAdapter(this, itemList); // Pass the context recyclerView.setAdapter(itemAdapter); // Initialize Firebase database reference databaseReference = FirebaseDatabase.getInstance().getReference("items"); // Fetch data from Firebase fetchItemsFromDatabase(); } private void fetchItemsFromDatabase() { databaseReference.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(@NonNull DataSnapshot snapshot) { itemList.clear(); for (DataSnapshot dataSnapshot : snapshot.getChildren()) { Item item = dataSnapshot.getValue(Item.class); itemList.add(item); } itemAdapter.notifyDataSetChanged(); } @Override public void onCancelled(@NonNull DatabaseError error) { // Handle possible errors. } }); } }

Step : 3

In step 3 create a resource file named item_layout then copy this code and put it in your project.

Resorce file ( item_layout.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="wrap_content" xmlns:app="http://schemas.android.com/apk/res-auto" android:orientation="vertical" android:padding="5dp"> <androidx.cardview.widget.CardView android:layout_width="match_parent" android:layout_gravity="start" app:cardCornerRadius="10dp" android:id="@+id/card1" android:background="@color/white" android:layout_height="100dp"> <TextView android:id="@+id/titleTextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="10dp" android:text="title3" android:layout_gravity="center_vertical" android:textSize="28sp" android:textStyle="bold" /> <TextView android:id="@+id/subtitleTextView" android:text="title2" android:padding="10dp" android:layout_gravity="start" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="20sp" /> <TextView android:id="@+id/titleTextView2" android:text="title1" android:padding="10dp" android:layout_marginTop="19dp" android:layout_gravity="right" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="25sp" android:textStyle="bold" /> </androidx.cardview.widget.CardView> </LinearLayout>

Step : 4

In step 3 create a resource file named "Item" then copy this code and put it in your project.

Resurce file (Item.java)

public class Item { private String title; private String subtitle; private int text; // Required empty constructor for Firebase public Item() { } public Item(String title, String subtitle, String img) { this.title = title; this.subtitle = subtitle; this.text = text; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getSubtitle() { return subtitle; } public void setSubtitle() { this.subtitle = subtitle; } public int gettext() { return text; } public void settext(String title) { this.text = text; } }

Step : 5

In step 5 create a resource file named ItemAdapter then copy this code and put it in your project.

Resurce File (ItemAdapter.java)

import android.content.Context; import android.content.Intent; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.cardview.widget.CardView; import androidx.recyclerview.widget.RecyclerView; import java.util.List; public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.ItemViewHolder> { private List<Item> itemList; private Context context; public ItemAdapter(Context context, List<Item> itemList) { this.context = context; this.itemList = itemList; } @NonNull @Override public ItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false); return new ItemViewHolder(view); } @Override public void onBindViewHolder(@NonNull ItemViewHolder holder, int position) { Item item = itemList.get(position); holder.titleTextView.setText(item.getTitle()); holder.subtitleTextView.setText(item.getSubtitle()); holder.titleTextView2.setText(item.getSubtitle()); // Set click listener on the item holder.itemView.setOnClickListener(v -> { // Start DetailActivity and pass data Intent intent = new Intent(context, DetailActivity.class); intent.putExtra("title", item.getTitle()); intent.putExtra("subtitle", item.getSubtitle()); context.startActivity(intent); }); } @Override public int getItemCount() { return itemList.size(); } public static class ItemViewHolder extends RecyclerView.ViewHolder { TextView titleTextView, subtitleTextView , titleTextView2; CardView card1; ImageView img; public ItemViewHolder(@NonNull View itemView) { super(itemView); titleTextView = itemView.findViewById(R.id.titleTextView); subtitleTextView = itemView.findViewById(R.id.subtitleTextView); titleTextView2 = itemView.findViewById(R.id.titleTextView2); card1 = itemView.findViewById(R.id.card1); } } }

Step : 6

Now the dynamic list has been created and we will transfer the list to another screen by clicking on it.

2. Activity (activity_detail.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:orientation="vertical" android:padding="16dp"> <com.google.android.material.appbar.MaterialToolbar android:layout_width="match_parent" android:layout_height="70dp" android:background="@color/white" android:textAlignment="center"> <TextView android:id="@+id/detailTitleTextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="10dp" android:text="ffevfv" android:textSize="22sp" android:textStyle="bold" /> </com.google.android.material.appbar.MaterialToolbar> <TextView android:id="@+id/detailSubtitleTextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="8dp" android:text="evmrgbrg" android:textSize="18sp" /> </LinearLayout>

2. Activity (DetailActivity.java)

package com.example.myapplication; import android.content.Intent; import android.os.Bundle; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; public class DetailActivity extends AppCompatActivity { private TextView titleTextView, subtitleTextView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_detail); titleTextView = findViewById(R.id.detailTitleTextView); subtitleTextView = findViewById(R.id.detailSubtitleTextView); // Get the intent and retrieve the passed data Intent intent = getIntent(); String title = intent.getStringExtra("title"); String subtitle = intent.getStringExtra("subtitle"); // Set the data to the TextViews titleTextView.setText(title); subtitleTextView.setText(subtitle); } } } }

Step : 7

Run Code

Before running the code, see the image given below and setup your database in firebase and after setup you can run your code.