Login.java

package com.irving.cares;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import com.irving.cares.webservices.WebServiceLogin;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.Signature;
import android.util.Base64;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.facebook.*;
import com.facebook.model.*;


public class Login extends Activity implements OnClickListener{

	private EditText etUser;
	private EditText etPassowrd;
	private Button buttonLogin;
	private Button buttonLoginFacebook;
	private TextView tvUser;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_login);
		
		initViews();
	}
	
	private void initViews(){
		etUser=(EditText)findViewById(R.id.etLoginUser);
		etPassowrd=(EditText)findViewById(R.id.etLoginPassword);
		
		tvUser=(TextView)findViewById(R.id.tvUserFacebook);
		
		buttonLogin=(Button)findViewById(R.id.btnLogin);
		buttonLogin.setOnClickListener(this);
		
		buttonLoginFacebook=(Button)findViewById(R.id.btnLoginFacebook);
		buttonLoginFacebook.setOnClickListener(this);
		
		etUser.setText("Sonae");
		etPassowrd.setText("dwojeD");
		
		printHashKey();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.login, menu);
		return true;
	}

	@Override
	public void onClick(View v) {
		
		if(v==buttonLogin){
			AsyncTaskWSLogin servicio=new AsyncTaskWSLogin(this, etUser.getText().toString(), 
				etPassowrd.getText().toString());
			servicio.execute();
		}
		else if(v==buttonLoginFacebook){
			initSesionOnFacebook();
		}
		
	}
	
	private void initSesionOnFacebook(){
		Session.openActiveSession(this, true, new Session.StatusCallback() {

		      // callback when session changes state
			
		      @Override
		      public void call(Session session, SessionState state, Exception exception) {
		    	  Log.i("TAG","abreidno session");
		        if (session.isOpened()) {

		        	Log.i("TAG", "Sesion abierta");
		          // make request to the /me API
		          Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {
		            // callback after Graph API response with user object
		            @Override
		            public void onCompleted(GraphUser user, Response response) {
		              if (user != null) {
		                Log.i("TAG", "Usuario de face:" + user.getName());
		                try{
		                	tvUser.setText("" + user.getName());
		                }catch(Exception e){
		                	e.printStackTrace();
		                }
		              }
		              else
		            	  Log.i("TAG", "Usuario de face: null");
		            }
		          });
		        }
		        else
		        	Log.i("TAG", "Sesion no abierta =(");
		      }
		    });
	}
	
	 @Override
	  public void onActivityResult(int requestCode, int resultCode, Intent data) {
	      
	      Log.i("TAG", "En on activity result");
	      Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
	  }
	
	 public void printHashKey() {

		 Log.i("TAG", "Hash");
	        try {
	            PackageInfo info = getPackageManager().getPackageInfo("com.irving.cares",
	                    PackageManager.GET_SIGNATURES);
	            for (Signature signature : info.signatures) {
	                MessageDigest md = MessageDigest.getInstance("SHA");
	                md.update(signature.toByteArray());
	                Log.d("TAG",
	                        Base64.encodeToString(md.digest(), Base64.DEFAULT));
	            }
	        } catch (NameNotFoundException e) {
	        	e.printStackTrace();
	        } catch (NoSuchAlgorithmException e) {
	        	e.printStackTrace();
	        }

	    }
	///////////////////////////////////////////////////////
	private class AsyncTaskWSLogin extends AsyncTask<Void, Void, Boolean> {

		protected ProgressDialog dialogo;
		private Activity act;
		private String user;
		private String password;

		public AsyncTaskWSLogin(Activity actividad,String user,String pass) {

			act=actividad;
			this.user=user;
			password=pass;
			Log.i("TAG", "En constructor de consultando");
		}

		protected void onPreExecute() {
			Log.i("TAG", "En preExectute");
			dialogo = new ProgressDialog(act);
			dialogo.setIndeterminate(true);
			dialogo.setMessage("Log in");
			dialogo.setTitle("Target Cares");
			dialogo.setCancelable(false);
			dialogo.show();
		}

		@Override
		protected Boolean doInBackground(Void... params) {
			Log.i("TAG", "En backgroud Login");
			WebServiceLogin login=new WebServiceLogin();
			
			return login.iniciarSesion(user, password);
		}

		protected void onPostExecute(Boolean result) {
			Log.i("TAG", "En PostExecute");
			Log.i("TAG","PostExecute:" + result);
			dialogo.cancel();
			
			if(result){
				Intent homeScreen=new Intent(act,HomePage.class);
				homeScreen.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
				act.startActivity(homeScreen);
			}
			else
				Toast.makeText(act, "Password wonkie", Toast.LENGTH_LONG).show();
		}
	
	}// Termina AsyncTask

	////////////////////////////////////////////////////////

}