Android Application for List Activity.

Question -5

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.

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Step 1: Create New Project in Eclipse.

Step 2: Edit Main ListActivity xml file from res/layout folder of your project.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="71dp"
        android:text="Enter Any Number"
        android:textSize="30dp" />

    <EditText
        android:id="@+id/txtnum"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="20dp"
        android:ems="10"
        android:hint="Integer Only" />

    <Button
        android:id="@+id/btnenter"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:text="Submit" />

</RelativeLayout>

Step 3: Add New ListDisplay xml file to your res/layout folder of your project.

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="No of Items Entered Are As Follows"
        android:textSize="20dp" />
     <ListView android:layout_height="wrap_content"
android:layout_width="match_parent" android:id="@+id/@android:id/list"
android:longClickable="true" android:fastScrollEnabled="false"></ListView>
</TableLayout>

Step 4: Edit Main List Activity Java file from src/package/ folder of your project.

package com.example.List;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.support.v4.app.NavUtils;

public class ListActivity extends Activity implements OnClickListener
{

Button submit;
EditText num;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list);
        submit = (Button)findViewById(R.id.btnenter);
        num = (EditText)findViewById(R.id.txtnum);
        submit.setOnClickListener(this);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_list, menu);
        return true;
    }

@Override
public void onClick(View arg0)
{
String n = num.getText().toString();
Intent i = new Intent(this,ListDisplay.class);
i.putExtra("number",n);
startActivity(i);
}

 
}

Step 5: Add New ListDisplay Java class file to your src/package/ folder of your project.

package com.example.List;

import java.util.ArrayList;

import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class ListDisplay  extends ListActivity
{
 
ArrayList<String> arr=new ArrayList<String>();
ArrayAdapter<String> a;  
int i=0;
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_disp);
        a = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 ,arr);
        setListAdapter(a);
        for(i=1; i<= Integer.parseInt(getIntent().getStringExtra("number")); i++)
        {
        arr.add("Item : "+i);
        }
        //Toast.makeText(this, "Welcome", Toast.LENGTH_LONG).show();
    }
}

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