PlanActivity.java

package com.papagiannis.tuberun;

import java.util.Date;
import java.util.List;

import android.content.Context;
import android.content.Intent;
import android.location.Address;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.ListFragment;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TabHost;
import android.widget.TextView;

import com.papagiannis.tuberun.fetchers.Observer;
import com.papagiannis.tuberun.fetchers.ReverseGeocodeFetcher;
import com.papagiannis.tuberun.plan.Plan;
import com.papagiannis.tuberun.stores.DestinationStore;

public class PlanActivity extends FragmentActivity implements LocationListener {
	final PlanActivity self = this;
	private static Plan plan = new Plan();
	DestinationStore<Destination> store = DestinationStore.getInstance();

	ReverseGeocodeFetcher geocoder = new ReverseGeocodeFetcher(this, null);
	Observer geolocationObserver = new Observer() {
		@Override
		public void update() {
			displayLocation(geocoder.getResult());
		}
	};

	LinearLayout mainmenu_layout;
	Button back_button;
	Button logo_button;
	TextView title_textview;
	Button go_home_empty_button;
	Button go_home_full_button;
	TextView location_textview;
	TextView location_accuracy_textview;
	LinearLayout location_layout;
	ProgressBar location_progressbar;

	TabHost mTabHost;
	ViewPager mViewPager;
	TabsAdapter mTabsAdapter;
	PlanFragment planFragment;
	ListFragment savedFragment;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		new SlidingBehaviour(this, R.layout.plan);
		
		setupTabHost(savedInstanceState);
		plan = new Plan();
		create();
		updateHomeButton();
		Intent intent = getIntent();
		if (intent!=null && intent.getAction()!=null) {
			onNewIntent(intent);
		}
	}

	private void setupTabHost(Bundle savedInstanceState) {
		mTabHost = (TabHost) findViewById(android.R.id.tabhost);
		mViewPager = (ViewPager) findViewById(R.id.pager);

		mTabHost.setup();
		mTabsAdapter = new TabsAdapter(this, mTabHost, mViewPager);
		mTabsAdapter.addTab(mTabHost.newTabSpec("New").setIndicator("new"),
				PlanFragment.class, null);
		mTabsAdapter.addTab(mTabHost.newTabSpec("Saved").setIndicator("old"),
				PlanStoredFragment.class, null);

		planFragment = (PlanFragment) mTabsAdapter.getItem(0);
		savedFragment = (PlanStoredFragment) mTabsAdapter.getItem(1);

		if (savedInstanceState != null) {
			mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
		}
	}

	private void createReferences() {
		mainmenu_layout = (LinearLayout) findViewById(R.id.mainmenu_layout);
		back_button = (Button) findViewById(R.id.back_button);
		logo_button = (Button) findViewById(R.id.logo_button);
		title_textview = (TextView) findViewById(R.id.title_textview);
		title_textview = (TextView) findViewById(R.id.title_textview);
		go_home_empty_button = (Button) findViewById(R.id.go_home_empty_button);
		go_home_full_button = (Button) findViewById(R.id.go_home_full_button);
		location_textview = (TextView) findViewById(R.id.location_textview);
		location_accuracy_textview = (TextView) findViewById(R.id.location_accuracy_textview);
		location_progressbar = (ProgressBar) findViewById(R.id.location_progressbar);
		location_layout = (LinearLayout) findViewById(R.id.location_layout);
	}

	private void create() {
		createReferences();

		// updateHistoryView();
		go_home_full_button.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				try {
					planFragment.restoreDestination(store.getHome(self));
					planFragment.onClick(planFragment.go_layout);
				}
				catch (Exception e) {
					Log.w("PlanActivity", e);
					finish();
				}
			}
		});
		go_home_full_button.setOnLongClickListener(new View.OnLongClickListener() {
			@Override
			public boolean onLongClick(View v) {
				planFragment.eraseHome();
				return true;
			}
		});
		
		go_home_empty_button.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				planFragment.showDialog(PlanFragment.SET_HOME_DIALOG);
			}
		});

		planFragment.planActivity = this;

		// Setup the location manager
		locationManager = (LocationManager) this
				.getSystemService(Context.LOCATION_SERVICE);
		lastKnownLocation = locationManager
				.getLastKnownLocation(LocationManager.GPS_PROVIDER);
		if (lastKnownLocation == null)
			lastKnownLocation = locationManager
					.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
		if (lastKnownLocation != null) {
			// never trust old accuracies
			if (lastKnownLocation.getAccuracy() < 50)
				lastKnownLocation.setAccuracy(1000);
			// remeber to reverse gocode the old address.
			reverseGeocode(lastKnownLocation);
		} else {
			// Make sure that lastKnowLocaton is never null
			lastKnownLocation = new Location("FAKE");
		}
		if (lastKnownLocation == null)
			lastKnownLocation = new Location("FAKE");
		if (lastKnownLocation != null)
			plan.setStartingLocation(lastKnownLocation);
	}

	void updateHomeButton() {
		Destination d = store.getHome(this);
		boolean existsHome = d != null && !d.getDestination().equals("")
				&& d.isHome();
		if (existsHome) {
			go_home_empty_button.setVisibility(View.GONE);
			go_home_full_button.setVisibility(View.VISIBLE);
		} else {
			go_home_empty_button.setVisibility(View.VISIBLE);
			go_home_full_button.setVisibility(View.GONE);
		}
	}

	void storeDestination() {
		Destination d = new Destination(plan.getDestination(),
				plan.getDestinationType());
		store.add(d, self);
	}

	public static Plan getPlan() {
		return plan;
	}

	public static Plan setPlan(Plan p) {
		plan = p;
		return plan;
	}

	// LocationListener Methods
	LocationManager locationManager;
	Location lastKnownLocation;
	Date started;

	private void displayLocation(List<Address> result) {
		if (result == null || result.size() < 1) {
			location_textview.setText("Fetching address...");
			planFragment.updateLocationDialog(null, "",
					"" + lastKnownLocation.getAccuracy());
		} else {
			String geoc_result = result.get(0).getAddressLine(0);
			location_textview.setText(geoc_result);
			planFragment.updateLocationDialog(null, geoc_result, ""
					+ lastKnownLocation.getAccuracy());
		}
		location_accuracy_textview.setText("accuracy="
				+ Math.round(lastKnownLocation.getAccuracy()) + "m");

	}

	private void reverseGeocode(Location l) {
		geocoder.abort();
		geocoder = new ReverseGeocodeFetcher(this, l);
		geocoder.registerCallback(geolocationObserver).update();
	}

	@Override
	public void onLocationChanged(Location l) {
		if (LocationHelper.isBetterLocation(l, lastKnownLocation)) {
			lastKnownLocation = l;
			plan.setStartingLocation(lastKnownLocation);
			displayLocation(null);
			reverseGeocode(l);
		}
	}

	public Location getCurrentLocation() {
		return lastKnownLocation;
	}

	@Override
	public void onProviderDisabled(String arg0) {
	}

	@Override
	public void onProviderEnabled(String arg0) {
	}

	@Override
	public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
	}

	void requestLocationUpdates() {
		try {
			LocationHelper.requestLocationUpdates(locationManager, this);
		} catch (Exception e) {
			Log.w("LocationService", e);
			planFragment.showDialog(PlanFragment.LOCATION_SERVICE_FAILED);
		}
	}

	void stopLocationUpdates() {
		if (locationManager != null)
			location_progressbar.setVisibility(View.GONE);
		locationManager.removeUpdates(this);
	}

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

	@Override
	protected void onResume() {
		super.onResume();
		setPlan(getPlan().copyBasicInfo()); //use a new instance that is separate from the old one
		if (locationManager != null && !planFragment.is_wait_dialog)
			requestLocationUpdates();
	}
	
	@Override
	protected void onSaveInstanceState(Bundle outState) {};
	
	@Override
	protected void onRestoreInstanceState(Bundle savedInstanceState) {};
	
	@Override
	protected void onNewIntent(Intent intent) {
		try {
			String a=intent.getAction();
			if (a.equals(Intent.ACTION_RUN)) {
				setIntent(intent);
				planFragment.handleIntent(intent);
			}
			else activateDepartures(intent);
		}
		catch (Exception e) {
			Log.w("PlanActivity",e);
		}
	}
	
	private void activateDepartures(Intent intent) {
		intent.setClass(this, SelectLineActivity.class);
		startActivity(intent);
		finish();
	}

}