Recycle listview is the listview better than a simple list view now here is the code to create Recycle listview with dynamic listview raw.
First need to add Recycle listview library in build.gradle(Module:app) file
dependencies {
implementation 'androidx.recyclerview:recyclerview:1.1.0'
}
Then in activity_main.xml file add below code
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rvalphabets"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
Then make new xml file recycleview_row.xml and add below code
<?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"
android:orientation="horizontal"
android:padding="10dp"
android:layout_gravity="center"
android:gravity="center">
<TextView android:id="@+id/tvandroidversionname"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text=""
android:textSize="35sp"
android:textStyle="bold"
android:textColor="@color/colorPrimary"/>
<ImageView android:id="@+id/imgview"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"
android:gravity="center"
android:visibility="gone"/>
</LinearLayout>
Then make new xml file customdialog.xml and add below code
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="200dp"
android:padding="10dp"
android:background="@android:color/white">
<FrameLayout android:id="@+id/frmcustom"
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="@color/colorPrimary">
<ImageButton android:id="@+id/closebtn"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_gravity="top|right"
android:layout_margin="10dp"
android:background="@android:drawable/ic_menu_close_clear_cancel"/>
<TextView android:id="@+id/tvdialogName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:layout_below="@+id/closebtn"
android:text=""
android:textSize="25sp"
android:padding="10dp"
android:textStyle="bold"
android:layout_marginTop="20dp"
android:textColor="@android:color/white"/>
</FrameLayout>
</RelativeLayout>
And then make one Adapter for recycle list view
MyRecycleViewAdapter.java and add below code
import android.content.Context;
import androidx.recyclerview.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.List;
public class MyRecyclerViewAdapter extends
RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {
private List<String> mData;
private LayoutInflater mInflater;
private ItemClickListener mClickListener;
Context mContext;
// data is passed into the constructor
MyRecyclerViewAdapter(Context context, List<String> data) {
this.mInflater = LayoutInflater.from(context);
this.mData = data;
mContext = context;
}
// inflates the row layout from xml when needed
@Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.recyclerview_row, parent, false);
return new ViewHolder(view);
}
// binds the data to the TextView in each row
@Override public void onBindViewHolder(ViewHolder holder, int position) {
String alphabet = mData.get(position);
holder.myTextView.setText(alphabet);
}
// 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.tvAlphabetsName);
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);
}
}
And final code in MainActivity.java
import android.app.Dialog;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.view.View;
import android.widget.ImageButton;
import android.widget.TextView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity implements
MyRecyclerViewAdapter.ItemClickListener{
Context mcontext;
MyRecyclerViewAdapter adapter;
String gettext;
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mcontext = MainActivity.this;
// data to populate the RecyclerView with
ArrayList<String> alphabetsNames = new ArrayList<>();
alphabetsNames.add("Android Cupcake.");
alphabetsNames.add("Android Donut.");
alphabetsNames.add("Android Eclair.");
alphabetsNames.add("Android Froyo.");
alphabetsNames.add("Android Gingerbread.");
alphabetsNames.add("Android Honeycomb.");
alphabetsNames.add("Android Ice Cream Sandwich.");
alphabetsNames.add("Android Jelly Bean.");
alphabetsNames.add("Android KitKat");
alphabetsNames.add("Android Lollipop");
alphabetsNames.add("Android Marshmallow");
alphabetsNames.add("Android Nougat");
alphabetsNames.add("Android Oreo");
alphabetsNames.add("Android Pie");
// set up the RecyclerView
RecyclerView recyclerView = findViewById(R.id.tvandroidversionname);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new MyRecyclerViewAdapter(this, alphabetsNames);
adapter.setClickListener(this);
recyclerView.setAdapter(adapter);
}
@Override public void onItemClick(View view, int position) {
gettext = adapter.getItem(position);
// custom dialog final Dialog dialog = new Dialog(mcontext);
dialog.setContentView(R.layout.customdialog);
// set the custom dialog components - text, image and button
TextView text = (TextView) dialog.findViewById(R.id.tvdialogName);
ImageButton closebtn = (ImageButton)dialog.findViewById(R.id.closebtn);
text.setText(gettext);
closebtn.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
}
