PlaceViewActivity.java

package course.labs.contentproviderlab;

import android.app.ListActivity;
import android.app.LoaderManager.LoaderCallbacks;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Loader;
import android.database.Cursor;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;
import course.labs.contentproviderlab.provider.PlaceBadgesContract;

public class PlaceViewActivity extends ListActivity implements
		LocationListener, LoaderCallbacks<Cursor> {
	private static final long FIVE_MINS = 5 * 60 * 1000;

	private static String TAG = "Lab-ContentProvider";

	// False if you don't have network access
	// Use this variable when starting a PlaceDownloaderTask
	public static boolean sHasNetwork = false;

	private boolean mMockLocationOn = false;

	// The last valid location reading
	private Location mLastLocationReading;

	// The ListView's adapter
	// private PlaceViewAdapter mAdapter;
	private PlaceViewAdapter mCursorAdapter;

	// default minimum time between new location readings
	private long mMinTime = 5000;

	// default minimum distance between old and new readings.
	private float mMinDistance = 1000.0f;

	// Reference to the LocationManager
	private LocationManager mLocationManager;

	// A fake location provider used for testing
	private MockLocationProvider mMockLocationProvider;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		if (!Environment.getExternalStorageState().equals(
				Environment.MEDIA_MOUNTED)) {
			Toast.makeText(getApplicationContext(),
					"External Storage is not available.", Toast.LENGTH_LONG)
					.show();
			finish();
		}

		mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
		

		// TODO - add a footerView to the ListView
		// You can use footer_view.xml to define the footer
		
		View footerView = null;

		// TODO remove after completing TODO immediately above
		if (null == footerView ) {
			return;
		}

		// TODO - footerView must respond to user clicks, handling 3 cases:

		// There is no current location - response is up to you. The best
		// solution is to always disable the footerView until you have a
		// location.

		// There is a current location, but the user has already acquired a
		// PlaceBadge for this location - issue a Toast message with the text -
		// "You already have this location badge." 
		// Use the PlaceRecord class' intersects() method to determine whether 
		// a PlaceBadge already exists for a given location

		// There is a current location for which the user does not already have
		// a PlaceBadge. In this case download the information needed to make a new
		// PlaceBadge.

		footerView.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View view) {
				Log.i(TAG, "Entered footerView.OnClickListener.onClick()");


			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			}

		});

		getListView().addFooterView(footerView);

		// TODO - Create and set empty PlaceViewAdapter
		mCursorAdapter = null;
		
		
		// TODO - Initialize the loader

		
	}

	@Override
	protected void onResume() {
		super.onResume();

		startMockLocationManager();

		// TODO - Check NETWORK_PROVIDER for an existing location reading.
		// Only keep this last reading if it is fresh - less than 5 minutes old


		
		
		
		
		
		// TODO - register to receive location updates from NETWORK_PROVIDER


		
		
	}

	@Override
	protected void onPause() {

		// TODO - unregister for location updates
		mLocationManager.removeUpdates(this);

		shutdownMockLocationManager();
		super.onPause();

	}

	public void addNewPlace(PlaceRecord place) {

		Log.i(TAG, "Entered addNewPlace()");


		// TODO - Attempt to add place to the adapter, considering the following cases

		// A PlaceBadge for this location already exists - issue a Toast message
		// with the text - "You already have this location badge." Use the PlaceRecord 
		// class' intersects() method to determine whether a PlaceBadge already exists
		// for a given location. Do not add the PlaceBadge to the adapter
		
		// The place is null - issue a Toast message with the text
		// "PlaceBadge could not be acquired"
		// Do not add the PlaceBadge to the adapter
		
		// The place has no country name - issue a Toast message
		// with the text - "There is no country at this location". 
		// Do not add the PlaceBadge to the adapter
		
		// Otherwise - add the PlaceBadge to the adapter



		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
		
	}

	// LocationListener methods
	@Override
	public void onLocationChanged(Location currentLocation) {

		// TODO - Update location considering the following cases.
		// 1) If there is no last location, set the last location to the current
		// location.
		// 2) If the current location is older than the last location, ignore
		// the current location
		// 3) If the current location is newer than the last locations, keep the
		// current location.



	
	
	
	}

	@Override
	public void onProviderDisabled(String provider) {
		// not implemented
	}

	@Override
	public void onProviderEnabled(String provider) {
		// not implemented
	}

	@Override
	public void onStatusChanged(String provider, int status, Bundle extras) {
		// not implemented
	}

	
	// LoaderCallback methods
	@Override
	public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
		Log.i(TAG, "Entered onCreateLoader()");

		// TODO - Create a new CursorLoader and return it
		return null;
		
	}

	@Override
	public void onLoadFinished(Loader<Cursor> newLoader, Cursor newCursor) {
		Log.i(TAG, "Entered onLoadFinished()");

		// TODO - Swap in the newCursor


	
	}

	@Override
	public void onLoaderReset(Loader<Cursor> newLoader) {
		Log.i(TAG, "Entered onLoaderReset()");

		// TODO - swap in a null Cursor

	
	
	}

	// Returns age of location in milliseconds
	private long ageInMilliseconds(Location location) {
		return System.currentTimeMillis() - location.getTime();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		MenuInflater inflater = getMenuInflater();
		inflater.inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case R.id.delete_badges:
			if (null != mCursorAdapter) {
				mCursorAdapter.removeAllViews();
			}
			return true;
		case R.id.place_one:
			mMockLocationProvider.pushLocation(37.422, -122.084);
			return true;
		case R.id.place_no_country:
			mMockLocationProvider.pushLocation(0, 0);
			return true;
		case R.id.place_two:
			mMockLocationProvider.pushLocation(38.996667, -76.9275);
			return true;
		default:
			return super.onOptionsItemSelected(item);
		}
	}

	private void shutdownMockLocationManager() {
		if (mMockLocationOn) {
			mMockLocationProvider.shutdown();
		}
	}

	private void startMockLocationManager() {
		if (!mMockLocationOn) {
			mMockLocationProvider = new MockLocationProvider(
					LocationManager.NETWORK_PROVIDER, this);
		}
	}
}