postheadericon SQLite Android Tutorial

Create an application to make Insert , update , Delete and retrieve operation on the database


File Name : E18Activity.java


package bsr.exa;
import java.util.Locale;
import android.app.Activity;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
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.widget.Toast;

public class E18Activity extends Activity {
    /**
     *  @author Bipin S Rupadiya , www.gtu-android.blogspot.com
     *
     *  18) Create an application to make Insert , update , Delete and retrieve operation on the database.
     *
     *
     * */
SQLiteDatabase db;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        createDB();
      //do insert
Button btnInsert=(Button)findViewById(R.id.btnInsert );
        btnInsert.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {

insert();
}
});
        Button btnClear=(Button)findViewById(R.id.btnClear );
        btnClear.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
clear();
}
});
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);
    CreateMenu(menu);
    return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
    return MenuChoice(item);
    }
 
    private void CreateMenu(Menu menu)
    {
    MenuItem mnu1 = menu.add(0, 0, 0, "Insert");
    {
    mnu1.setAlphabeticShortcut('i');
    mnu1.setIcon(android.R.drawable.ic_input_add);
    }
    MenuItem mnu2 = menu.add(0, 1, 1, "Search");
    {
    mnu2.setAlphabeticShortcut('s');
    mnu2.setIcon(android.R.drawable.ic_search_category_default);
   
    }
    MenuItem mnu3 = menu.add(0, 2, 2, "Delete");
    {
    mnu3.setAlphabeticShortcut('d');
    mnu3.setIcon(android.R.drawable.ic_delete);

    }
    MenuItem mnu4 = menu.add(0, 3, 3, "View");
    {
    mnu4.setAlphabeticShortcut('d');
    mnu4.setIcon(android.R.drawable.ic_menu_info_details);
    }
     }
    private boolean MenuChoice(MenuItem item)
    {
    Intent intent=new Intent();
    switch (item.getItemId()) {
    case 0:
    insert();
    return true;
    case 1:
    intent.setClass(E18Activity.this, Search.class);
startActivity(intent);
return true;
    case 2:
    intent.setClass(E18Activity.this, Search.class);
startActivity(intent);
    return true;

    case 3:
    intent.setClass(E18Activity.this, ViewRecord.class);
    startActivity(intent);
        return true;

    }
    return false;
    }
    public void createDB()
{
db=openOrCreateDatabase("Student.db", SQLiteDatabase.CREATE_IF_NECESSARY, null);
db.setLocale(Locale.getDefault());
db.setLockingEnabled(true);
db.setVersion(1);
String sql="create table if not exists Stud(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER)";
db.execSQL(sql);
}
public void insert()
{
EditText txtName=(EditText)findViewById(R.id.txtName);
EditText txtAge=(EditText)findViewById(R.id.txtAge);
if(txtName.getText().toString().equals(""))
{
Toast.makeText(E18Activity.this, "Enter Name.", Toast.LENGTH_SHORT).show();
    }
else if (txtAge.getText().toString().equals(""))
{
Toast.makeText(E18Activity.this, "Enter Age.", Toast.LENGTH_SHORT).show();
}
else
{

String sql="insert into Stud(name,age) values('"+ txtName.getText().toString() +"',"+txtAge.getText().toString()+")";
db.execSQL(sql);
clear();
Toast.makeText(E18Activity.this, "Record Successfully Inserted.", Toast.LENGTH_SHORT).show();
}  
}
public void clear()
{
EditText txtName=(EditText)findViewById(R.id.txtName);
EditText txtAge=(EditText)findViewById(R.id.txtAge);
txtName.setText("");
txtAge.setText("");

txtName.clearFocus();
txtAge.clearFocus();
txtName.requestFocus();


}
@Override
    public void onDestroy()
{
super.onDestroy();
db.close();
}
}

File Name : Search.java


package bsr.exa;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.Toast;
/**
 *  @author Bipin S Rupadiya , www.gtu-android.blogspot.com
 *
 *  18) Create an application to make Insert , update , Delete and retrieve operation on the database.
 *
 *
 * */
public class Search extends Activity {
SQLiteDatabase db;
EditText txtSearch;
EditText txtName;
EditText txtAge;
Button btnEdit;
Button btnDelete;
RelativeLayout rlRecord;
    RelativeLayout rlSearch;
    String recID="0";
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
     
        setContentView(R.layout.search);
     
         db=openOrCreateDatabase("Student.db", SQLiteDatabase.CREATE_IF_NECESSARY, null);
     
       
      txtName = (EditText)findViewById(R.id.txtName);
      txtAge = (EditText)findViewById(R.id.txtAge);
        txtSearch = (EditText)findViewById(R.id.txtSearch);
        btnEdit=(Button)findViewById(R.id.btnEdit);
        btnDelete=(Button)findViewById(R.id.btnDelete);
     
        txtSearch.requestFocus();
        txtName.setEnabled(false);
        txtAge.setEnabled(false);
        btnEdit.setEnabled(false);
        btnDelete.setEnabled(false);
     
        Button btnSearch=(Button)findViewById(R.id.btnSearch);
        btnSearch.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
  if (txtSearch.getText().toString().equals(""))
{
Toast.makeText(Search.this, "Enter value.", Toast.LENGTH_SHORT).show();
}
else
{
searchRecord();
}
}
});
        //---------------Edit/update---------------------------------
        final Button btnEdit=(Button)findViewById(R.id.btnEdit);
        btnEdit.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {

  if (btnEdit.getText().toString().equals("Edit"))
{
  btnEdit.setText("Update");
  txtName.setEnabled(true);
          txtAge.setEnabled(true);
       
          txtName.requestFocus();
       
         btnDelete.setEnabled(false);
     
}
else
{
txtName.setEnabled(false);
          txtAge.setEnabled(false);
       
         btnDelete.setEnabled(true);
     
btnEdit.setText("Edit");
String sql="update Stud set name='"+txtName.getText().toString()+"', age="+txtAge.getText().toString()+" where id="+recID;
    db.execSQL(sql);
    Toast.makeText(Search.this, "  Record Updated Successfully" , Toast.LENGTH_LONG).show();
}
}
});
        //------------------------Delete ---------------------------
     
        btnDelete.setOnClickListener(new OnClickListener() {

public void onClick(View arg0)
{
// TODO Auto-generated method stub
AlertDialog.Builder alertbox = new AlertDialog.Builder(arg0.getContext());
alertbox.setIcon(android.R.drawable.ic_dialog_alert);
alertbox.setTitle("Confirm");
alertbox.setMessage("Are You Sure? You want to delete this record");
alertbox.setPositiveButton("Delete", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface arg0, int arg1)
{
// TODO Auto-generated method stub
String sql="Delete from Stud where id="+recID;
   db.execSQL(sql);
Toast.makeText(getApplicationContext(), "Record Deleted", Toast.LENGTH_LONG).show();
//clear old search result
txtSearch.setText("");
txtName.setText("");
txtAge.setText("");
txtSearch.requestFocus();
}
});
    alertbox.setNegativeButton("  Cancel  ", new DialogInterface.OnClickListener()
    {
public void onClick(DialogInterface arg0, int arg1)
{
// TODO Auto-generated method stub

}
});
    alertbox.show();
   }
});
    }
public void searchRecord()
{
try
        {
        txtSearch = (EditText)findViewById(R.id.txtSearch);
        txtName = (EditText)findViewById(R.id.txtName);
        txtAge = (EditText)findViewById(R.id.txtAge);
        //Cursor c=db.rawQuery("select id,name,age from Stud where id="+ txtSearch.getText().toString(), null);        
        Cursor c=db.rawQuery("select id,name,age from Stud where id=?", new String[]{txtSearch.getText().toString()});
       
           if(c.getCount()>0)
            {
            c.moveToNext();
                recID= c.getString(0);
            txtName.setText( c.getString(1));
                 txtAge.setText(c.getString(2));
              btnEdit.setEnabled(true);
                 btnDelete.setEnabled(true);
            }
            else
            {
            Toast.makeText(this, "No Record Found" , Toast.LENGTH_LONG).show();
            }
        }
        catch(Exception e)
        {
        Toast.makeText(this, ""+e, Toast.LENGTH_LONG).show();
        }
}
public void onDestroy()
{
super.onDestroy();
db.close();
}
}




File Name : ViewRecord.java


package bsr.exa;
/**
 *  @author Bipin S Rupadiya , www.gtu-android.blogspot.com
 *
 *  18) Create an application to make Insert , update , Delete and retrieve operation on the database.
 *
 *
 * */
import java.util.ArrayList;

import android.app.ListActivity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.Toast;
 public class ViewRecord extends ListActivity {
SQLiteDatabase db;
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        try
        {
        db=openOrCreateDatabase("Student.db", SQLiteDatabase.CREATE_IF_NECESSARY, null);        
        Cursor c=db.rawQuery("select id,name,age from Stud", null);
           ArrayList<String> list  = new ArrayList<String>();
       
            int count=c.getCount();
                     
            if(c.getCount()>0)
            {
                while(c.moveToNext())
            {
             list.add(c.getString(0)+" , "+c.getString(1)+" , "+c.getString(2));
                }              
            c.close();
            Toast.makeText(this,"Total Records: "+count, Toast.LENGTH_LONG).show();
            ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, list);
            getListView().setAdapter(adapter);
            }
            else
            {
            Toast.makeText(this, "No Record Found" , Toast.LENGTH_LONG).show();
            }
        }
        catch(Exception e)
        {
        Toast.makeText(this, ""+e, Toast.LENGTH_LONG).show();
        }
    }
public void onDestroy()
{
super.onDestroy();
db.close();
}
}


Layout 1 : main.xml


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/LL">

<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />

<RelativeLayout android:layout_width="match_parent" android:id="@+id/relativeLayout1" android:layout_height="match_parent">

    <TextView android:layout_width="wrap_content" android:id="@+id/textView1" android:textAppearance="?android:attr/textAppearanceLarge" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:text="Name:"></TextView>

    <EditText android:inputType="textPersonName" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_alignParentLeft="true" android:layout_width="match_parent" android:id="@+id/txtName">
        <requestFocus></requestFocus>
    </EditText>

    <TextView android:layout_width="wrap_content" android:id="@+id/textView2" android:textAppearance="?android:attr/textAppearanceLarge" android:layout_height="wrap_content" android:layout_below="@+id/txtName" android:layout_alignParentLeft="true" android:layout_marginTop="24dp" android:text="Age:"></TextView>

    <EditText android:inputType="phone" android:layout_height="wrap_content" android:layout_below="@+id/textView2" android:layout_alignParentLeft="true" android:layout_width="match_parent" android:id="@+id/txtAge"></EditText>

    <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/txtAge" android:layout_toRightOf="@+id/textView1" android:layout_marginTop="24dp" android:id="@+id/btnInsert" android:text="Insert"></Button>

    <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/btnInsert" android:layout_toRightOf="@+id/btnInsert" android:layout_marginLeft="26dp" android:id="@+id/btnClear" android:text="Clear"></Button>

</RelativeLayout>

</LinearLayout>



Layout 2 : search.xml


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/LL" android:weightSum="1">

<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />

<RelativeLayout android:layout_width="match_parent" android:gravity="left" android:layout_height="wrap_content" android:id="@+id/rlSearch">

    <TextView android:layout_width="wrap_content" android:id="@+id/textView1" android:textAppearance="?android:attr/textAppearanceLarge" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:text="Search by ID :"></TextView>

    <EditText android:inputType="textPersonName" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:id="@+id/txtSearch" android:layout_width="250dp"></EditText>

    <Button android:layout_width="wrap_content" android:text="Search" android:id="@+id/btnSearch" android:layout_height="wrap_content" android:layout_alignTop="@+id/txtSearch" android:layout_toRightOf="@+id/txtSearch"></Button>

</RelativeLayout>

<RelativeLayout android:layout_height="312dp" android:gravity="center_vertical" android:layout_width="match_parent" android:layout_gravity="center_vertical" android:id="@+id/rlRecord">

    <TextView android:layout_width="wrap_content" android:text="Name:" android:id="@+id/textView1" android:textAppearance="?android:attr/textAppearanceLarge" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_height="wrap_content"></TextView>

    <EditText android:layout_width="match_parent" android:id="@+id/txtName" android:inputType="textPersonName" android:layout_below="@+id/textView1" android:layout_alignParentLeft="true" android:layout_height="wrap_content">
        <requestFocus></requestFocus>
    </EditText>

    <EditText android:layout_width="match_parent" android:id="@+id/txtAge" android:inputType="phone" android:layout_below="@+id/textView2" android:layout_alignParentLeft="true" android:layout_height="wrap_content"></EditText>

    <Button android:text="Delete" android:id="@+id/btnDelete" android:layout_height="wrap_content" android:layout_alignTop="@+id/btnEdit" android:layout_toRightOf="@+id/btnEdit" android:layout_width="160dp"></Button>

    <Button android:layout_width="160dp" android:text="Edit" android:id="@+id/btnEdit" android:layout_height="wrap_content" android:layout_below="@+id/txtAge" android:layout_alignParentLeft="true" android:layout_marginTop="30dp"></Button>

    <TextView android:layout_width="wrap_content" android:text="Age:" android:id="@+id/textView2" android:textAppearance="?android:attr/textAppearanceLarge" android:layout_height="wrap_content" android:layout_below="@+id/txtName" android:layout_alignParentLeft="true" android:layout_marginTop="14dp"></TextView>

</RelativeLayout>

</LinearLayout>

AndroidManifest.xml


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="bsr.exa"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".E18Activity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name="ViewRecord"></activity>
        <activity android:name="Search"></activity>

    </application>
</manifest>


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