LoginActivity.java

package sg.vinova.vss.group5.non.activity;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import oauth.signpost.OAuthConsumer;
import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;

import sg.vinova.vss.group5.non.R;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class LoginActivity extends Activity {

	private SharedPreferences prefs;
	//TextView console;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_login);
		
		this.prefs = PreferenceManager.getDefaultSharedPreferences(this);
        
        // Define Text Console
        //console = (TextView) findViewById(R.id.console);

        // Define button
        Button launchOauth = (Button) findViewById(R.id.launchOAuth);
        //Button clearCredentials = (Button) findViewById(R.id.delete_token);
        //Button getContacts = (Button) findViewById(R.id.get_contacts);
        //Button gotoMainscreen = (Button) findViewById(R.id.goto_mainscreen);
        
        
        // If click on GotoMainscreen => start new MainScreen
        /**
        gotoMainscreen.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {          
            	startActivity(new Intent().setClass(v.getContext(), MainScreen.class));
            	overridePendingTransition( R.anim.slide_in_left, R.anim.slide_out_left );
            }
        });
        */
        
        
        // If click on launchOAuth => start new RequestTokenActivity
        launchOauth.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	//startActivity(new Intent().setClass(v.getContext(), RequestTokenActivity.class));
            	startActivity(new Intent().setClass(v.getContext(), PrepareRequestTokenActivity.class));
            	overridePendingTransition( R.anim.slide_in_left, R.anim.slide_out_left );
            }
        });

        // If click on Delete Tokens => Do it
        /**
        clearCredentials.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	clearCredentials();
            	console.setText("Tokens deleted, getContacts call should fail now.");
            }
        });
        */                
        
        //Feature.dial(this, "12345");
        
        // If click on Get Contact => Do it
        /**
        getContacts.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	getContacts();            	
            	//Feature.dial(v.getContext(), "12345");
            	//Feature.sendSMS(v.getContext(), "12345");
            	//Feature.sendEmail(v.getContext(), "tungkudo94@gmail.com");            
            }
        });
        */
        
        
	}
	
	@Override
	public void onNewIntent(Intent intent) {
		Log.d(C.TAG, "pik 7a");
		super.onNewIntent(intent);
		
	}

	@Override
	protected void onStart() {
		super.onStart();
	}

	@Override
	protected void onPause() {
		super.onPause();
	}

	@Override
	protected void onRestart() {
		// TODO Auto-generated method stub
		super.onRestart();
	}	

	@Override
	protected void onStop() {
		super.onStop();
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
	}
	
	/*
	public void launchOAuth(View view) {
		startActivity(new Intent().setClass(view.getContext(), RequestTokenActivity.class));
	}
	*/	

	private void getContacts() {			
		String jsonOutput = "";
	    try {
	    	jsonOutput = makeSecuredReq(C.GET_CONTACTS_FROM_GOOGLE_REQUEST,getConsumer(this.prefs));
	     	JSONObject jsonResponse = new JSONObject(jsonOutput);
	    	JSONObject m = (JSONObject)jsonResponse.get("feed");
	    	JSONArray entries =(JSONArray)m.getJSONArray("entry");
	    	String contacts = "";
	    	for (int i=0 ; i<entries.length() ; i++) {
	    		JSONObject entry = entries.getJSONObject(i);
	    		JSONObject title = entry.getJSONObject("title");
	    		if (title.getString("$t")!=null && title.getString("$t").length()>0) {
	    			contacts += title.getString("$t") + "\n";
	    		}
	    	}	    	
	  //  	console.setText(contacts);
		} catch (Exception e) {
			Log.e(C.TAG, "Error executing request",e);
		//	console.setText("Error retrieving contacts : " + jsonOutput);
		}
	}
	
	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.onResume();
		Log.d(C.TAG, "pik 7c");
		Log.d(C.TAG, "pik 7bb");
		if (isOAuthSuccessful()) {
			// OAuth successful, try getting the contacts
			//console.setText("OAuth successful, try getting the contacts");
			
	    	startActivity(new Intent().setClass(this, MainScreen.class));
		}
		else {
			//console.setText("OAuth failed, no tokens, Click on the Do OAuth Button.");
		}
	}
	
	/*
	public static void logout() {
		clearCredentials();
	}
	*/
	
	private void clearCredentials() {
		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
		final Editor edit = prefs.edit();
		edit.remove("oauth_token");
		edit.remove("oauth_token_secret");
		edit.commit();
	}
	
	private boolean isOAuthSuccessful() {		
		try {
		    Thread.sleep(3000);
		} catch(InterruptedException ex) {
		    Thread.currentThread().interrupt();
		}
		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
		String token = prefs.getString("oauth_token", null);
		String secret = prefs.getString("oauth_token_secret", null);
		Log.d(C.TAG, "pik6 " + token + " " + secret);
		if (token != null && secret != null)
			return true;
		else 
			return false;
	}
	
	
	private OAuthConsumer getConsumer(SharedPreferences prefs) {
		String token = prefs.getString("oauth_token", "");
		String secret = prefs.getString("oauth_token_secret", "");
		OAuthConsumer consumer = new CommonsHttpOAuthConsumer(C.CONSUMER_KEY, C.CONSUMER_SECRET);
		consumer.setTokenWithSecret(token, secret);
		return consumer;
	}
	
	private String makeSecuredReq(String url,OAuthConsumer consumer) throws Exception {
		DefaultHttpClient httpclient = new DefaultHttpClient();
		HttpGet request = new HttpGet(url);
		Log.i(C.TAG,"Requesting URL : " + url);
		consumer.sign(request);
		HttpResponse response = httpclient.execute(request);
		Log.i(C.TAG,"Statusline : " + response.getStatusLine());
		InputStream data = response.getEntity().getContent();
		BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(data));
	    String responeLine;
	    StringBuilder responseBuilder = new StringBuilder();
	    while ((responeLine = bufferedReader.readLine()) != null) {
	    	responseBuilder.append(responeLine);
	    }
	    Log.i(C.TAG,"Response : " + responseBuilder.toString());
	    return responseBuilder.toString();
	}
	
	
}