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| package login.sample;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class LoginActivity extends Activity {
/** Called when the activity is first created. */
private static final String TAG = "Login";
Button signin;
String loginmessage = null;
Thread t;
private SharedPreferences mPreferences;
ProgressDialog dialog;
private InputSource retrieveInputStream(HttpEntity httpEntity) {
InputSource insrc = null;
try {
insrc = new InputSource(httpEntity.getContent());
} catch (Exception e) {
}
return insrc;
}
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
String loginmsg=(String)msg.obj;
if(loginmsg.equals("SUCCESS")) {
removeDialog(0);
Intent intent=new Intent(getApplicationContext(),Welcome.class);
startActivity(intent);
finish();
}
}
};
public void tryLogin() {
Log.v(TAG, "Trying to Login");
EditText etxt_user = (EditText) findViewById(R.id.txt_username);
EditText etxt_pass = (EditText) findViewById(R.id.txt_password);
String username = etxt_user.getText().toString();
String password = etxt_pass.getText().toString();
DefaultHttpClient client = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://127.0.0.1/Serveur/Andr.php");
List nvps = new ArrayList();
nvps.add(new BasicNameValuePair("username", username));
nvps.add(new BasicNameValuePair("password", password));
try {
UrlEncodedFormEntity p_entity = new UrlEncodedFormEntity(nvps, HTTP.UTF_8);
httppost.setEntity(p_entity);
HttpResponse response = client.execute(httppost);
Log.v(TAG, response.getStatusLine().toString());
HttpEntity responseEntity = response.getEntity();
Log.v(TAG, "Set response to responseEntity");
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
LoginHandler myLoginHandler = new LoginHandler();
xr.setContentHandler(myLoginHandler);
xr.parse(retrieveInputStream(responseEntity));
ParsedLoginDataSet parsedLoginDataSet = myLoginHandler.getParsedLoginData();
if (parsedLoginDataSet.getExtractedString().equals("SUCCESS")) {
// Store the username and password in SharedPreferences after the successful login
SharedPreferences.Editor editor=mPreferences.edit();
editor.putString("UserName", username);
editor.putString("PassWord", password);
editor.commit();
Message myMessage=new Message();
myMessage.obj="SUCCESS";
handler.sendMessage(myMessage);
} else if(parsedLoginDataSet.getExtractedString().equals("ERROR")) {
Intent intent = new Intent(getApplicationContext(), LoginError.class);
intent.putExtra("LoginMessage", parsedLoginDataSet.getMessage());
startActivity(intent);
removeDialog(0);
}
} catch (Exception e)
{
Intent intent = new Intent(getApplicationContext(), LoginError.class);
intent.putExtra("LoginMessage", "Unable to login");
startActivity(intent);
removeDialog(0);
}
}
//Checking whether the username and password has stored already or not
private final boolean checkLoginInfo() {
boolean username_set = mPreferences.contains("UserName");
boolean password_set = mPreferences.contains("PassWord");
if ( username_set || password_set ) {
return true;
}
return false;
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case 0: {
dialog = new ProgressDialog(this);
dialog.setMessage("Please wait while connecting...");
dialog.setIndeterminate(true);
dialog.setCancelable(true);
return dialog;
}
}
return null;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mPreferences = getSharedPreferences("CurrentUser", MODE_PRIVATE);
if (!checkLoginInfo()) {
signin = (Button) findViewById(R.id.btn_sign_in);
signin.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showDialog(0);
t=new Thread() {
public void run() {
tryLogin();
}
};
t.start();
}
});
}
else {
/*Directly opens the Welcome page, if the username and password is already available
in the SharedPreferences*/
Intent intent=new Intent(getApplicationContext(),Welcome.class);
startActivity(intent);
finish();
}
}
} |
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