Button - Sự kiện lick button bất kì

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent;
switch(v.getId())
{
case R.id.btnLogin_frmMain:
try
{
/* if(!isSimAvail())
{
Toast.makeText(getApplicationContext(), getString(R.string.lblNoticeSim_frmMain), Toast.LENGTH_LONG).show() ;
return;
}*/
KillBackgroundProcessestoFreeUpMemory();
m_objSetting.GetByKey("eBiz");
if (m_objSetting.SlsperID.equalsIgnoreCase(m_txtUserID.getText().toString()) && m_objSetting.Password.equals(m_txtPassword.getText().toString()))
{
StartServer();
intent = new Intent(this, frmMain.class);
intent.putExtra("ParentForm", "frmLogin");
intent.putExtra("ReturnForm", "");
this.startActivity(intent);
}
else
{
clsUtil.ShowMsgBox(this, getResources().getString(R.string.lblInvalidPassword));
}
}
catch(Exception e)
{
clsUtil.ShowMsgErr(this, e.getMessage());
}
break;

case R.id.btnExit_frmMain:
this.finish();
System.exit(0);
break;
case R.id.btnAbout_frmMain:
//checkAndSendGPS();
intent = new Intent(this, frmAbout.class);
intent.putExtra("ParentForm", "frmLogin");
intent.putExtra("ReturnForm", "");
startActivity(intent);  
break;
}

}