Showing posts with label ListView Data Select And Delete. Show all posts
Showing posts with label ListView Data Select And Delete. Show all posts

Wednesday, 16 March 2011

ListView Data Select And Delete

New Android Project Select

Project Name : ListviewSample

Build Target : Android 2.2

Application Name :  ListviewSample

Package Name :  com.ovte.listviewsample

Create Activity : ListviewSample

Min SDK Version : 8

Open AndroidManifest.xml File

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.ovte.listviewsample"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name="ListviewSample"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    <uses-sdk android:minSdkVersion="3" />
</manifest> 


Open ListviewSample.java File

package com.ovte.listviewsample;

import java.util.ArrayList;
import java.util.Arrays;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;

public class ListviewSample extends ListActivity {

    /** We want to display these names as our list items */
    String[] names = {
 "Piyush","Ankit","Dipak","Hitesh","Renuka","Dharmesh","Mitesh","Mihir","Lalit","Kiran","Rohit","Krunal"
    };
   
    private ArrayAdapter<String> adapter;        // The list adapter
    private String selectedItem;                // Stores the selected list item
    private final Context context = this;        // This context
   
   
    /** Called when the activity is first created. */
    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
       
        // Create the listener for normal item clicks
        OnItemClickListener itemListener = new OnItemClickListener() {

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

                Toast.makeText(
                        getApplicationContext(),
                        "You have clicked on " + parent.getItemAtPosition(position).toString() + ".",
                        Toast.LENGTH_SHORT).show();
            }
        };
       
        // Create the listener for long item clicks
        OnItemLongClickListener itemLongListener = new OnItemLongClickListener() {

            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View v, int position, long rowid) {
               
                // Store selected item in global variable
                selectedItem = parent.getItemAtPosition(position).toString();
       
                AlertDialog.Builder builder = new AlertDialog.Builder(context);
                builder.setMessage("Do you want to remove " + selectedItem + "?");
                builder.setCancelable(false);
                builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                   
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                       
                        adapter.remove(selectedItem);
                        adapter.notifyDataSetChanged();
               
                        Toast.makeText(
                                getApplicationContext(),
                                selectedItem + " has been removed.",
                                Toast.LENGTH_SHORT).show();
                    }
                });
                builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
                   
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                });

                // Create and show the dialog
                builder.show();
               
                // Signal OK to avoid further processing of the long click
                return true;
            }
        };
       
        // Convert array to ArrayList
        ArrayList<String> list = new ArrayList<String>(Arrays.asList(names));
       
        // Create new ArrayAdapter with the ArrayList as underlying data source
        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,list);
       
        // Assign adapter to the list
        setListAdapter(adapter);
       
        // Assign both click listeners
        getListView().setOnItemClickListener(itemListener);
        getListView().setOnItemLongClickListener(itemLongListener);
    }
}

Output 

  Application Run Then Default Display This Type
 

    Click On ListView Then Selected Value Display


 
Long Press on Value When Delete Dialog Display