Create an application that will pass some number to the next screen, and on the next screen that number of items should be display in the list.


MainActivity.java

package com.example.assignment5;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends AppCompatActivity implements OnClickListener {

    EditText editnum;

    Button btshow;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        editnum=(EditText) findViewById(R.id.editTextNumber);

        btshow=(Button) findViewById(R.id.buttonshow);

        btshow.setOnClickListener(this);

    }

    @Override

    public void onClick(View v) {

        if (v.getId() == btshow.getId()) {

            Intent intent = new Intent(MainActivity.this, listActivity.class);

            startActivity(intent);

            intent.putExtra("num", Integer.parseInt(editnum.getText().toString()));

            this.startActivity(intent);

        }

    }

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout 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="match_parent"

    tools:context=".MainActivity">

    <EditText

        android:id="@+id/editTextNumber"

        android:layout_width="199dp"

        android:layout_height="46dp"

        android:layout_marginEnd="104dp"

        android:layout_marginRight="104dp"

        android:layout_marginBottom="40dp"

        android:ems="10"

        android:hint="Enter the number of item"

        android:inputType="textPersonName"

        app:layout_constraintBottom_toTopOf="@+id/buttonshow"

        app:layout_constraintEnd_toEndOf="parent" />

    <Button

        android:id="@+id/buttonshow"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginBottom="238dp"

        android:text="ENTER"

        android:textColor="#000000"

        android:textSize="24sp"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintHorizontal_bias="0.498"

        app:layout_constraintStart_toStartOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

listActivity.java

package com.example.assignment5;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.Toast;

public class listActivity extends AppCompatActivity implements OnItemClickListener {

    ListView lv;

    String items[];

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_list);

        lv=(ListView) findViewById(R.id.listViewItems);

        int num=getIntent().getIntExtra("num", 0);

        items=new String[num];

        for(int i=0;i<num;i++)

        {

            items[i]="item "+(i+1);

        }

        ArrayAdapter<String> arr=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,items);

        lv.setAdapter(arr);

        lv.setOnItemClickListener(this);

    }

    @Override

    public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {

        Toast.makeText(this,items[pos] + " selected", Toast.LENGTH_SHORT).show();

    }

}

activity_list.xml

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout 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="match_parent"

    tools:context=".listActivity">

    <ListView

        android:id="@+id/listViewItems"

        android:layout_width="312dp"

        android:layout_height="595dp"

        android:layout_marginStart="58dp"

        android:layout_marginLeft="58dp"

        android:layout_marginEnd="58dp"

        android:layout_marginRight="58dp"

        android:layout_marginBottom="36dp"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintHorizontal_bias="0.529"

        app:layout_constraintStart_toStartOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

Output

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