| login.java |
package c.test2;
import android.app.AlertDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Objects;
/*********************************************************************************************
* Login Class/Activity
* This activity takes care of the login feature in the application. emaildata and
passworddata are grabbed from the login screen and sent to the server to
check the validity of the user. Compares to userlist.txt file on compsco02.
* Calls btnTest's onClickListener when button is pressed.
*********************************************************************************************/
public class Login extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Button btntest = (Button) findViewById(R.id.btnTest);
final EditText emaildata = (EditText) findViewById(R.id.txtEmail);
final EditText passworddata = (EditText) findViewById(R.id.txtPassword);
/**************************************************************
* btnTest OnClickListener
* Upon button click, executes ConnectTask thread to contact
userlist.txt file on compsci02 server. Sends in server
url, emaildata, and passworddata.
**************************************************************/
btntest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new ConnectTask().execute("http://compsci02.snc.edu/cs460/2016/lewicj/WhereAreYou/userlist.txt", emaildata.getText().toString(), passworddata.getText().toString());
}
});
}
/******************************************************************************************
* ConnectTask
* This AsyncTask uses an HttpURLConnection to contact the compsci02 server and read the
data from the userlist.txt file.
* Has background function and OnPostExecute function
*****************************************************************************************/
public class ConnectTask extends AsyncTask<String, String, String>
{
/**************************************************************
* doInBackground
* Creates a connection with the file on the server and reads
each line one by one until the end of the file. if the
email and password match on in the file then it will
log that user in. Otherwise it will notify user
appropriatly.
**************************************************************/
@Override
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
String user[];
String useremail = params[1]; //grabs emaildata that was sent in through parameters
String userpassword = params[2]; //grabs passworddata through parameters
try {
URL url = new URL(params[0]); //grabs URL sent in through parameters
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
String line = "";
//while loop goes through every line in file
while ((line = reader.readLine()) != null)
{
user = line.split(";");
if(Objects.equals(user[0], useremail))
{
if(Objects.equals(user[1], userpassword))
{
return user[2];
}
return "Password does not match email";
}
}
return "User Not Found";
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return "Error";
}
/**************************************************************
* onPostExecute
* the AsyncTask's onPostExecute function connects the
independant thread with the main threads UI. aka this
is where the data gets placed to the screen or where
the program can start a new activity.
* This function checks to see if what the result returned from the
background function is, and notifys the user correctly.
if the user was found correctly in file then it will
start the mainactivity.
**************************************************************/
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if(Objects.equals(result, "User Not Found"))
{
Toast.makeText(Login.this,result,Toast.LENGTH_SHORT).show();
}
else if(Objects.equals(result, "Password does not match email"))
{
Toast.makeText(Login.this,result,Toast.LENGTH_SHORT).show();
}
else if(Objects.equals(result, "Error"))
{
Toast.makeText(Login.this,result,Toast.LENGTH_SHORT).show();
}
else
{
Intent i = new Intent(getApplicationContext(), MainActivity.class);
i.putExtra("user", result); //passes variable between different activities
startActivity(i);
}
}
}
}
import android.app.AlertDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Objects;
/*********************************************************************************************
* Login Class/Activity
* This activity takes care of the login feature in the application. emaildata and
passworddata are grabbed from the login screen and sent to the server to
check the validity of the user. Compares to userlist.txt file on compsco02.
* Calls btnTest's onClickListener when button is pressed.
*********************************************************************************************/
public class Login extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Button btntest = (Button) findViewById(R.id.btnTest);
final EditText emaildata = (EditText) findViewById(R.id.txtEmail);
final EditText passworddata = (EditText) findViewById(R.id.txtPassword);
/**************************************************************
* btnTest OnClickListener
* Upon button click, executes ConnectTask thread to contact
userlist.txt file on compsci02 server. Sends in server
url, emaildata, and passworddata.
**************************************************************/
btntest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new ConnectTask().execute("http://compsci02.snc.edu/cs460/2016/lewicj/WhereAreYou/userlist.txt", emaildata.getText().toString(), passworddata.getText().toString());
}
});
}
/******************************************************************************************
* ConnectTask
* This AsyncTask uses an HttpURLConnection to contact the compsci02 server and read the
data from the userlist.txt file.
* Has background function and OnPostExecute function
*****************************************************************************************/
public class ConnectTask extends AsyncTask<String, String, String>
{
/**************************************************************
* doInBackground
* Creates a connection with the file on the server and reads
each line one by one until the end of the file. if the
email and password match on in the file then it will
log that user in. Otherwise it will notify user
appropriatly.
**************************************************************/
@Override
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
String user[];
String useremail = params[1]; //grabs emaildata that was sent in through parameters
String userpassword = params[2]; //grabs passworddata through parameters
try {
URL url = new URL(params[0]); //grabs URL sent in through parameters
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
String line = "";
//while loop goes through every line in file
while ((line = reader.readLine()) != null)
{
user = line.split(";");
if(Objects.equals(user[0], useremail))
{
if(Objects.equals(user[1], userpassword))
{
return user[2];
}
return "Password does not match email";
}
}
return "User Not Found";
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return "Error";
}
/**************************************************************
* onPostExecute
* the AsyncTask's onPostExecute function connects the
independant thread with the main threads UI. aka this
is where the data gets placed to the screen or where
the program can start a new activity.
* This function checks to see if what the result returned from the
background function is, and notifys the user correctly.
if the user was found correctly in file then it will
start the mainactivity.
**************************************************************/
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if(Objects.equals(result, "User Not Found"))
{
Toast.makeText(Login.this,result,Toast.LENGTH_SHORT).show();
}
else if(Objects.equals(result, "Password does not match email"))
{
Toast.makeText(Login.this,result,Toast.LENGTH_SHORT).show();
}
else if(Objects.equals(result, "Error"))
{
Toast.makeText(Login.this,result,Toast.LENGTH_SHORT).show();
}
else
{
Intent i = new Intent(getApplicationContext(), MainActivity.class);
i.putExtra("user", result); //passes variable between different activities
startActivity(i);
}
}
}
}