Nikos Maravitsas

About Nikos Maravitsas

Nikos has graduated from the Department of Informatics and Telecommunications of The National and Kapodistrian University of Athens. Currently, his main interests are system’s security, parallel systems, artificial intelligence, operating systems, system programming, telecommunications, web applications, human – machine interaction and mobile development.

Android MultiTouch ListView Example

In this example we are going to see how to create MutliTouch ListView in an Android Application. In this example, every Item in the list is clickable, so you can bundle it with a ClickListener,  and it contains two buttons to edit and delete items.

For this tutorial, we will use the following tools in a Windows 64-bit platform:

  1. JDK 1.7
  2. Eclipse 4.2 Juno
  3. Android SKD 4.2

 

1. Create a new Android Project

Open Eclipse IDE and go to File -> New -> Project -> Android -> Android Application Project and click Next.

You have to specify the Application Name, the Project Name and the Package name in the appropriate text fields and then click Next.

create-new-project-attributes

In the next window make sure the “Create activity” option is selected in order to create a new activity for your project, and click Next. This is optional as you can create a new activity after creating the project, but you can do it all in one step.

check-create-new-activity

Select “BlankActivity” and click Next.

create-blanc-activity

You will be asked to specify some information about the new activity.  In the Layout Name text field you have to specify the name of the file that will contain the layout description of your app. In our case the file res/layout/main.xml will be created. Then, click Finish.

2. Main layout

Go to the Package Explorer and open res/layout/main.xml:

main-xml

And paste the following code:

<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"
    android:background="#990044"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/listLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="Multi Touch List"
        android:textColor="#FFFFFF"
        android:textSize="25sp" />

    <ListView
        android:id="@+id/listView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_below="@+id/listLabel"
        android:layout_marginTop="5dp"
        android:cacheColorHint="#FFFFFF" />

</RelativeLayout>

3. Create a new xml Layout file

Now, we have to create a new XML file that will describe the layout of the items in the list.

Go to the Package Explorer and right click on the res/layout folder. Select New -> Other -> Android -> Android XML Layout File. And click Next:

Then specify the name of the file and the Layout type and click Finish:

create-new-layout

As you will see in the Package Explorer the new /res/layout/list_item.xml file has been created:

package-manager-layout

Open that file and paste the following code:

<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"
    android:padding="4dp"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="Name:"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/textAge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textName"
        android:layout_marginTop="5dp"
        android:text="Age:"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textSize="16sp" />

    <Button
        android:id="@+id/btnEdit"
        android:layout_width="80dp"
        android:layout_height="40dp"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:background="#99CC"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:text="Edit"
        android:textColor="#FFFFFF" />

    <Button
        android:id="@+id/btnDelete"
        android:layout_width="80dp"
        android:layout_height="40dp"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/btnEdit"
        android:layout_marginTop="3dp"
        android:background="#99CC"
        android:focusable="false"
        android:focusableInTouchMode="false"
        android:text="Delete"
        android:textColor="#FFFFFF" />

    <TextView
        android:id="@+id/textAddr"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textAge"
        android:layout_marginTop="5dp"
        android:text="Address:" />

</RelativeLayout>

4. Create a Student class

This class will simply represent the items in the lists. Go to the Package explorer:

source-files

Right click on the package  -> New -> Class. Fill out the name of  the class, as show in the picture below:

new-class-attrs

Now open the source file of the class and paste the following code:

Student.java:

package com.javacodegeeks.android.example.androidmultitouchlist;

public class Student {
	private String name;
	private String age;
	private String address;

	public Student(String name, String age, String address) {
		super();
		this.name = name;
		this.age = age;
		this.address = address;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getAge() {
		return age;
	}

	public void setAge(String age) {
		this.age = age;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}
}

5. Create a custom ArrayAdapter

To inflate the ListView with Items, we need an ArrayAdapter. So we are going to make our own custom one.

As before, go to the package explorer, right click on the package  -> New -> Class. Fill out the name of  the class, and the ArrayAdapter superclass, as show in the picture below:

new-myarray-adapter

Now open the source file of the class and paste the following code:

MyArrayAdapter.java:

package com.javacodegeeks.android.example.androidmultitouchlist;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MyArrayAdapter extends ArrayAdapter<Student> {

	Context context;
	int layoutResourceId;
	ArrayList<Student> students = new ArrayList<Student>();

	public MyArrayAdapter(Context context, int layoutResourceId,
			ArrayList<Student> studs) {
		super(context, layoutResourceId, studs);
		this.layoutResourceId = layoutResourceId;
		this.context = context;
		this.students = studs;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		View item = convertView;
		StudentWrapper StudentWrapper = null;

		if (item == null) {
			LayoutInflater inflater = ((Activity) context).getLayoutInflater();
			item = inflater.inflate(layoutResourceId, parent, false);
			StudentWrapper = new StudentWrapper();
			StudentWrapper.name = (TextView) item.findViewById(R.id.textName);
			StudentWrapper.age = (TextView) item.findViewById(R.id.textAge);
			StudentWrapper.address = (TextView) item.findViewById(R.id.textAddr);
			StudentWrapper.edit = (Button) item.findViewById(R.id.btnEdit);
			StudentWrapper.delete = (Button) item.findViewById(R.id.btnDelete);
			item.setTag(StudentWrapper);
		} else {
			StudentWrapper = (StudentWrapper) item.getTag();
		}

		Student student = students.get(position);
		StudentWrapper.name.setText(student.getName());
		StudentWrapper.age.setText(student.getAge());
		StudentWrapper.address.setText(student.getAddress());

		StudentWrapper.edit.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				Toast.makeText(context, "Edit", Toast.LENGTH_LONG).show();
			}
		});

		StudentWrapper.delete.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {

				Toast.makeText(context, "Delete", Toast.LENGTH_LONG).show();
			}
		});

		return item;

	}

	static class StudentWrapper {
		TextView name;
		TextView age;
		TextView address;
		Button edit;
		Button delete;
	}

}

6. Main Activity code

Now open the source file of the MainActivity.java class and paste the following code:

Student.java:

package com.javacodegeeks.android.example.androidmultitouchlist;

import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {
 ListView listview;
 MyArrayAdapter studentArrayAdapter;
 ArrayList<Student> studentArray = new ArrayList<Student>();

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  // inflate the array list with data
  studentArray.add(new Student("Nick", "18", "1st Street"));
  studentArray.add(new Student("John", "18", "2st Street"));
  studentArray.add(new Student("Anthony", "19", "3rd Street"));
  studentArray.add(new Student("James", "20", "5th Street"));
  studentArray.add(new Student("Jack", "20", "6th Street"));
  studentArray.add(new Student("Jeremy", "20", "7th Street"));
  studentArray.add(new Student("Long", "21", "1st Street"));

  // set the array adapter to use the above array list and tell the listview to set as the adapter
  // our custom adapter
  studentArrayAdapter = new MyArrayAdapter(MainActivity.this, R.layout.list_item, studentArray);
  listview= (ListView) findViewById(R.id.listView);
  listview.setItemsCanFocus(false);
  listview.setAdapter(studentArrayAdapter);

  listview.setOnItemClickListener(new OnItemClickListener() {

   @Override
   public void onItemClick(AdapterView<?> parent, View v,
     final int position, long id) {

    Toast.makeText(MainActivity.this,
      "List Item Clicked:" + position, Toast.LENGTH_LONG)
      .show();
   }
  });

 }

}

7. Run the Application

This is the main screen of our Application:

main-screen

Now, when you click on an Item in the list:

list-item-clicked

And when you click “Edit” and “Delete”:

click-edit

click-delete

Download Eclipse Project

This was an Android MultiTouch ListView Example. Download the Eclipse Project of this tutorial: AndroidMultiTouchList.zip

Related Whitepaper:

Beginning Android Application Development (Free Sample Chapter)

Create must-have applications for the latest Android OS!

The Android OS is a popular and flexible platform for many of today's most in-demand mobile devices. This full-color guide offers you a hands-on introduction to creating Android applications for the latest mobile devices. Veteran author Wei Meng Lee accompanies each lesson with real-world examples to drive home the content he covers. Beginning with an overview of core Android features and tools, he moves at a steady pace while teaching everything you need to know to successfully develop your own Android applications.

Get it Now!  

Examples Java Code Geeks and all content copyright © 2010-2014, Exelixis Media Ltd | Terms of Use | Privacy Policy
All trademarks and registered trademarks appearing on Examples Java Code Geeks are the property of their respective owners.
Java is a trademark or registered trademark of Oracle Corporation in the United States and other countries.
Examples Java Code Geeks is not connected to Oracle Corporation and is not sponsored by Oracle Corporation.

Sign up for our Newsletter

20,709 insiders are already enjoying weekly updates and complimentary whitepapers! Join them now to gain exclusive access to the latest news in the Java world, as well as insights about Android, Scala, Groovy and other related technologies.

As an extra bonus, by joining you will get our brand new e-books, published by Java Code Geeks and their JCG partners for your reading pleasure! Enter your info and stay on top of things,

  • Fresh trends
  • Cases and examples
  • Research and insights
  • Two complimentary e-books