Adding Long Click functionality in List View – Context Menus Clicks

Now that we are familiar with long clicks and Context Menus that are triggered by them, we must understand that Context Menus are but a kind of menu and just like any other type of menu, their items too are clickable. In fact, if there were no such options the whole purpose of displaying a menu is defeated.

In this post I will show you how to handle clicks on the Context Menu which is a rather simple task. All we need to do is add another method. Complete Source Code is at the bottom.

• Create the layout of the activity and insert a ListView into it.
• Switch over to the java file and declare the List View. Create the string array to populate the list.
• Declare and assign the ArrayAdapter to the ListView.
• Register the List View for Context Menu and create the method onCreateContextMenu(). Add the two menu items Edit and Delete.
• Now just after the onCreateContextMenu() method we define another method on:
  [java]
  public boolean onContextItemSelected(MenuItem item){
  if(item.getTitle()=="Edit")Toast.makeText(getApplicationContext(), "Edit Clicked", Toast.LENGTH_LONG).show();
  if(item.getTitle()=="Delete")Toast.makeText(getApplicationContext(), "Delete Clicked", Toast.LENGTH_LONG).show();
  return true;
  }
  [/java]
• Save your work and execute it on the device or the emulator.
• I am just displaying a Toast on the click of the Context Menu item. You can choose to do whatever you want.

COMPLETE SOURCE CODE

activity_main.xml

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >
 
    <ListView
        android:id="@+id/android:list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" >
    </ListView>
</RelativeLayout>

MainActivity.java

[java]
package com.nero.myfirstapp;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.provider.ContactsContract;
import android.provider.ContactsContract.PhoneLookup;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class Main extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String values[]=new String[]{"Vergil", "Dante", "Sparda", "Nero", "Arkham", "Agni", "Rudra", "Beowulf", "Nevan"};
ListView lv = getListView();
ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, android.R.id.text1,values);
lv.setAdapter(adapter);
registerForContextMenu(lv);

lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id){
String item = ((TextView)view).getText().toString();
Toast.makeText(getApplicationContext(), "Clicked: "+item, Toast.LENGTH_LONG).show();
}
});
}
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo){
menu.add(0, v.getId(), 0, "Edit");
menu.add(0, v.getId(), 0, "Delete");
}

public boolean onContextItemSelected(MenuItem item){
if(item.getTitle()=="Edit")Toast.makeText(getApplicationContext(), "Edit Clicked", Toast.LENGTH_LONG).show();
if(item.getTitle()=="Delete")Toast.makeText(getApplicationContext(), "Delete Clicked", Toast.LENGTH_LONG).show();
return true;
}
}
[/java]

nero