Create an application that will create database with table of User credential.

PRO15Activity.java

package vc.PRO15;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class PRO15Activity extends Activity implements OnItemClickListener {
    /**
     *  www.master-gtu.blogspot.com
     *  pankaj sharma(8460479175),
     *  chavda vijay(8460420769) 
     */
 SQLiteDatabase db;
 ListView lv;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        db=openOrCreateDatabase("database1",SQLiteDatabase.CREATE_IF_NECESSARY, null);
  db.execSQL("create table if not exists stud(id integer primary key AUTOINCREMENT,name text,age integer)");
  lv =(ListView) findViewById(R.id.list);
  lv.setOnItemClickListener(this);
  Cursor cur=db.query("stud",null, null, null, null, null, null);
  
  if(cur.getCount()>0)
  {
   String name[]=new String[cur.getCount()];
   int i=0;
   while(cur.moveToNext())
   {
    name[i++]=cur.getString(1);
   }
   ArrayAdapter aa=new ArrayAdapter(this,android.R.layout.simple_list_item_1,name);
   lv.setAdapter(aa);
  }
  else
  {
         Toast.makeText(this,"DataBase is Empty...", 1000).show();
  }
    }
 @Override
 public void onItemClick(AdapterView p, View v, int pos, long c) {
  // TODO Auto-generated method stub
  Intent myintent=new Intent(this,update.class);
  TextView iname=(TextView) v;
  myintent.putExtra("label",iname.getText().toString() );
  startActivity(myintent);
 }
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // TODO Auto-generated method stub
  super.onCreateOptionsMenu(menu);
  menu.add(0,5,0,"Insert");
  menu.add(0,1,0,"Update");
  menu.add(0,2,0,"Delete");
  return true;
 }
 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  // TODO Auto-generated method stub
   super.onOptionsItemSelected(item);
   if(item.getItemId()==5)
   {
    Intent myintent=new Intent(this,update.class);
    myintent.putExtra("flag",item.getItemId());
    startActivity(myintent);
   } 
   else if(item.getItemId()==1)
   {
    Intent myintent=new Intent(this,update.class);
    myintent.putExtra("flag",item.getItemId());
    startActivity(myintent);
   }
   else  if(item.getItemId()==2)
   {
    Intent myintent=new Intent(this,update.class);
    myintent.putExtra("flag",item.getItemId());
    startActivity(myintent);
   }
   return true;
 }
}

insert.java

package vc.PRO15;

import android.app.Activity;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;

public class insert extends Activity  {
    /**
     *  www.master-gtu.blogspot.com
     *  pankaj sharma(8460479175),
     *  chavda vijay(8460420769) 
     */
 SQLiteDatabase db;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        db=openOrCreateDatabase("database1",SQLiteDatabase.CREATE_IF_NECESSARY, null);
  db.execSQL("create table if not exists stud(id integer primary key,name text,age integer)");
    }
}

update.java

package vc.PRO15;

import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
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 update extends Activity implements OnClickListener, TextWatcher, OnItemClickListener  {
    /**
     *  www.master-gtu.blogspot.com
     *  pankaj sharma(8460479175),
     *  chavda vijay(8460420769) 
     */
 SQLiteDatabase db;
 EditText txtname,txtage,txtid;
 Button btnedit,btncancel;
 TextView lblage;
 ListView lv;
 String name[];
 int flag=-1;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.update);
        db=openOrCreateDatabase("database1",SQLiteDatabase.CREATE_IF_NECESSARY, null);
  db.execSQL("create table if not exists stud(id integer primary key AUTOINCREMENT,name text,age integer)");
  
  lblage=(TextView) findViewById(R.id.textView2);
  txtname=(EditText) findViewById(R.id.txtname);
  txtage=(EditText) findViewById(R.id.txtage);
  txtid=(EditText) findViewById(R.id.txtid);
  btnedit=(Button) findViewById(R.id.btnedit);
  btncancel=(Button) findViewById(R.id.btncancel);
  
  lv=(ListView) findViewById(R.id.list);
  lv.setVisibility(-1);
  txtid.setVisibility(-1);
  Intent myintent=getIntent();
  flag=myintent.getIntExtra("flag", 0);
  if(flag==0)
  {
   try
   {
    String label=myintent.getStringExtra("label");
    Cursor cur=db.query("stud",null,"name=?",new String []{label},null, null,null);
    cur.moveToFirst();
    Toast.makeText(this,cur.getString(0)+"", 1).show();
    txtid.setText(cur.getString(0)+"");
    txtname.setText(cur.getString(1));
    txtage.setText(cur.getString(2));
    btnedit.setText("Update");
    txtage.setEnabled(true);
   }
   catch(Exception e)
   {
    Toast.makeText(this,e.toString(), 1).show();
   }
  }
  else if(flag==1)
  {
   txtname.addTextChangedListener(this);
   lv.setVisibility(0);
   invisible();
   txtage.setEnabled(false);
  }
  else if(flag==2)
  {
   txtname.addTextChangedListener(this);
   lv.setVisibility(0);
   invisible();
   btnedit.setText("Delete");
  }
  else if(flag==5)
  {
   btnedit.setText("Save");
  }
  btnedit.setOnClickListener(this);
  btncancel.setOnClickListener(this);
  lv.setOnItemClickListener(this);
    }
    public void invisible()
    {
     lblage.setVisibility(-1);
     txtage.setVisibility(-1);
     btncancel.setVisibility(-1);
     btnedit.setVisibility(-1);
    }
    public void visible()
    {
     lblage.setVisibility(0);
     txtage.setVisibility(0);
     btncancel.setVisibility(0);
     btnedit.setVisibility(0);
    }
    public void clear()
    {
     txtid.setText("");
     txtname.setText("");
     txtage.setText("");
    }
 @Override
 public void onClick(View v) {
  // TODO Auto-generated method stub
  Button action=(Button) v;
  if(action.getText().toString().equals("Edit"))
  {
   txtage.setEnabled(true);
   btnedit.setText("Update");
  }
  else if(action.getText().toString().equals("Update"))
  {
   ContentValues value=new ContentValues();
   value.put("name", txtname.getText().toString());
   value.put("age",txtage.getText().toString());
   db.update("stud",value, "id=?", new String[]{txtid.getText().toString()});
   btnedit.setText("Edit");
   Toast.makeText(this,"Update Successfully",1000).show();
   startActivity(new Intent(this,PRO15Activity.class));
  }
  else if(action.getText().toString().equals("Delete"))
  {
   db.delete("stud", "id=?",new String[]{txtid.getText().toString()});
   Toast.makeText(this, "Record Deleted...", Toast.LENGTH_LONG).show();
   startActivity(new Intent(this,PRO15Activity.class));
  }
  else if(action.getText().toString().equals("Save"))
  {
   if(txtname.getText().toString().equals(""))
   {
    Toast.makeText(this,"Please Enter Name ...", 1).show();
   }
   else if(txtage.getText().toString().equals(""))
   {
    Toast.makeText(this,"Please Enter Age ...", 1).show();
   }
   else
   {
    try
    {
     Cursor cur=db.query("stud", null, "name=?",new String[]{txtname.getText().toString()},null, null,null);
     if(cur.getCount()>0)
     {
      Toast.makeText(this,"Name Allready Exists ...",1).show();
     }
     else
     {
       ContentValues values=new ContentValues();
       values.put("name", txtname.getText().toString());
       values.put("age",txtage.getText().toString());
       db.insert("stud",null, values);
       Toast.makeText(this,"Record Saved...", 1).show();
     }
    }
    catch(Exception e)
    {
     Toast.makeText(this,e.toString(), 1).show();
    }
   }
  }
  else if(v.getId()==btncancel.getId())
  {
   startActivity(new Intent(this,PRO15Activity.class));
  }
 }
 public void enabled()
 {
  txtage.setEnabled(true);
 }
 public void disabled()
 {
  txtage.setEnabled(false);
 }
 @Override
 public void afterTextChanged(Editable arg0) {
  // TODO Auto-generated method stub
  Cursor cur=db.rawQuery("select *from stud where name like '"+txtname.getText().toString()+"%'",null);
  int len=cur.getCount();
  try
  {
   if(txtname.getText().toString().equals(""))
   {
    lv.setAdapter(null);
    name[0]="";
   }
   else if(len>0)
   {
    if(txtname.getText().toString().equals(""))
    {
     lv.setAdapter(null);
     for(int i=0; i<len; i++)
      name[i]="";
    }
    else if(len>0)
    {
     name=new String[len];
     cur.moveToNext();
     for(int i=0; i<len; i++)
     {
      name[i]=cur.getString(1);
      cur.moveToNext();
     }
    }
    ArrayAdapter<String> aa=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,name);
    lv.setAdapter(aa);
   }
   else
   {
    Toast.makeText(this,"Recoerd Not Found...", 1000).show();
   }
  }
  catch(Exception e)
  {
   Toast.makeText(this,e.toString(),1000).show();
  }
 }
 @Override
 public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
   int arg3) {
  // TODO Auto-generated method stub
 }
 @Override
 public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
  // TODO Auto-generated method stub
 }
 @Override
 public void onItemClick(AdapterView<?> p, View v, int pos, long c) {
  // TODO Auto-generated method stub
  TextView iname=(TextView) v;
  String sname=iname.getText().toString();
  
  Cursor cur=db.rawQuery("select *from stud",null);
  if(cur.getCount()>0)
  {
   while(cur.moveToNext())
   {
    if(sname.equals(cur.getString(1)))
    {
     txtid.setText(cur.getInt(0)+"");
     txtname.setText(cur.getString(1));
     txtage.setText(cur.getString(2));
     break;
    }
   }
   visible();
   lv.setVisibility(-1);
  }
 }
}