Android Open Source - ETCh Login Activity

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Back to project page ETCh.

License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.etch;
// ww w  .  j  a va2s. co m
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.HttpResponseException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class LoginActivity extends ActionBarActivity 
implements com.example.etch.MyServiceTask.ResultCallback {
  public static final int DISPLAY_NUMBER = 10;
  // since we're not interoperating with other services, the following string is arbitrary
  public static final String PROTOCOL = "ETCh";
    private Handler mUiHandler;
    public String with = "them";
    public String user;
    private int ONGOING_NOTIFICATION_ID = 10;
    Button loginButton;
    Button registerButton;
    EditText usernameField;
    EditText passwordField;
    private String hashedPassword="this is the hashed password";
    public static Context context;
    
    
    private static final String LOG_TAG = "MainActivity";
    
    // Service connection variables.

    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if(MyApplication.getLoggedIn()){
          openListActivity();
        }
        else{
          setContentView(R.layout.fragment_login);
          context = this;
          MyApplication.setLoggedIn(false);
          MyApplication.createPath();
          loginButton = (Button) findViewById(R.id.button_login);
          registerButton = (Button) findViewById(R.id.button_register);
          usernameField = (EditText) findViewById(R.id.editor_username);
          passwordField = (EditText) findViewById(R.id.editor_password);
          MyApplication.resetFriendsPath();
        MyApplication.resetMessagesPath();
          setTitle("ETCh   Login");
          loginButton.setOnClickListener(new View.OnClickListener() {
              public void onClick(View v) {
                  attemptLogin();
              }
          });
          registerButton.setOnClickListener(new View.OnClickListener() {
              public void onClick(View v) {
                  openRegisterActivity();
              }
          });
          killMyNotification();
        }
        
    }
    @Override
    public void onResume(){
      super.onResume();
      killMyNotification();
      MyApplication.setLoggedIn(false);
    }
    
    @Override
    public void onBackPressed() {
        moveTaskToBack(true);
    }
    
    
    
    private void killMyNotification(){
      Log.i("killMyNotification", "inside method");
      if(MyService.notificationManager!=null){
        MyService.notificationManager.cancel(ONGOING_NOTIFICATION_ID);
        Log.i("killMyNotification", "manager isnt null");
      }
      
    }

    
    private boolean attemptLogin(){
      if(false){//check to see if there is internets
        passwordField.setText("");
        usernameField.setHint("Username");
        passwordField.setHint("Password");
        noConnectionDialog();
        return false;
      }
      String hashedPassword = passwordField.getText().toString();
      String userName= usernameField.getText().toString();
      if(false){//check to see if the login exists
        usernameField.setText("");
        passwordField.setText("");
        usernameField.setHint("No Such User");
        passwordField.setHint("Password");
        return false;
      }
      if(false){//hash the password and check with hashed password with the login
        passwordField.setText("");
        usernameField.setHint("Username");
        passwordField.setHint("Incorrect Password");
        return false;
      }
      //call getAllFriends function (either that or do it in MainActivity onCreate()
      Log.i("LoginActivity", userName + hashedPassword);
      MyApplication.userName = userName;
      MyApplication.hashedPassword = hashedPassword;
      loginUser(userName,hashedPassword);
      return true;
    }
    
    
private void noConnectionDialog(){
      AlertDialog.Builder builder = new AlertDialog.Builder(this);

        builder.setTitle("Error");
        builder.setMessage("No server connection, try again later.");

        builder.setPositiveButton("Okay", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {

                dialog.dismiss();
            }

        });

        AlertDialog alert = builder.create();
        alert.show();

    }
    
    
    private void openListActivity(){
      Intent intent = new Intent(this, MainActivity.class);
      /** set username and hashed password in MyApplication to be what was passed in here **/
      startActivity(intent);
      //finish(); this will call onDestroy
      
    }
    
    
    
    private void openRegisterActivity(){
      Intent intent = new Intent(this, RegisterActivity.class);
      startActivity(intent);
      //finish(); this will call onDestroy
      
    }
    
    private void loginUser(String username, String password){
      List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
    nameValuePairs.add(new BasicNameValuePair("user", username));
    nameValuePairs.add(new BasicNameValuePair("pass", password));
    new LoginTask().execute(nameValuePairs);
    }
    
    private class LoginTask extends AsyncTask<List<NameValuePair>, Void, String>{
      protected String doInBackground(List<NameValuePair>... pairsList){
          Log.i("LoginTask", "sending message");
      List<NameValuePair> pairs = pairsList[0];
      HttpClient httpclient = new DefaultHttpClient();
      HttpPost httppost = new HttpPost("https://etch-messaging.appspot.com/users/login");
      
      String responseString = "No response";
      if(/*netStatusIsGood()*/true){
          if(/*inetAddr()*/true){
            
            try {
            httppost.setEntity(new UrlEncodedFormEntity(pairs));
              HttpResponse response = httpclient.execute(httppost);
              responseString = new BasicResponseHandler().handleResponse(response);
          } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          } catch (HttpResponseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
          } else Log.i("RegisterTask", "No internet connection");
      }else Log.i("RegisterTask", "No Network connection");
      Log.i("doInBackground", responseString); 
        return responseString;
      }
    
    protected void onPostExecute(String result){
      Log.i("LoginTask", result);
      if(result.equals("login success")){
        MyApplication.setFriendsPath(MyApplication.userName);
          MyApplication.setMessagesPath(MyApplication.userName);
          MyApplication.createPath();
          openListActivity();
      }
      else{
        MyApplication.resetFriendsPath();
          MyApplication.resetMessagesPath();
        Toast.makeText(context,result, Toast.LENGTH_SHORT).show();
      }
    }
      
    }


  @Override
    public void onStop() {
            
    
            //Check device supported Accelerometer senssor or not
            
            super.onStop();
           
    }
  
  @Override
  public void onDestroy() {
    
    
    
    
    //Check device supported Accelerometer senssor or not
    
    super.onDestroy();
      
  }






  @Override
  public void onResultReady(ServiceResult result) {
    // TODO Auto-generated method stub
    
  }

   
    

}

Java Source Code List

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