Camera Class

package ie.gmit.computing;

//import com.example.cameratest.R;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.ActionBarActivity;
import android.text.Editable;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity implements OnClickListener,LocationListener {
	
	
	private static final String TAG = "CallCamera";
	private static final int CAPTURE_IMAGE_ACTIVITY_REQ = 0;
	
	
	Uri fileUri = null;
	ImageView photoImage = null;
	
	private TextView latituteField;
	private TextView longitudeField;
	private LocationManager locationManager;
	private String provider;
	
	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		photoImage = (ImageView) findViewById(R.id.photo_image);
		photoImage.setImageDrawable(null);
		
		Button mClickButton1 = (Button)findViewById(R.id.cameraBtn);
		mClickButton1.setOnClickListener(this);
		Button mClickButton2 = (Button)findViewById(R.id.searchBtn);
		mClickButton2.setOnClickListener(this);
		Button mClickButton3 = (Button)findViewById(R.id.resBtn);
		mClickButton3.setOnClickListener(this);
		
		
		latituteField = (TextView) findViewById(R.id.latitude_text);
	    longitudeField = (TextView) findViewById(R.id.longitude_text);

	    // Get the location manager
	    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
	    // Define the criteria how to select the locatioin provider -> use
	    // default
	    Criteria criteria = new Criteria();
	    provider = locationManager.getBestProvider(criteria, false);
	    Location location = locationManager.getLastKnownLocation(provider);

	    // Initialize the location fields
	    if (location != null) {
	      System.out.println("Provider " + provider + " has been selected.");
	      onLocationChanged(location);
	    } else {
	      latituteField.setText("Location not available");
	      longitudeField.setText("Location not available");
	      }
		
		
	}
	
	
 
	
	//handle button clicks
	public void onClick(View v) {
	    switch (v.getId()) {
	        case  R.id.cameraBtn: {
	            // start camera intent
	        	 Toast.makeText(this, "camera clicked", Toast.LENGTH_SHORT).show();
	        	 Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
	 	         try {
					File file = getOutputPhotoFile();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
	 	         try {
					fileUri = Uri.fromFile(getOutputPhotoFile());
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
	 	         i.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
	 	         startActivityForResult(i, CAPTURE_IMAGE_ACTIVITY_REQ );
	            break;
	        }
	        case  R.id.resBtn: {
	            // start camera intent
	        	 Toast.makeText(this, "result clicked", Toast.LENGTH_SHORT).show();
	        	 Intent myIntentO = new Intent(MainActivity.this, SearchResult.class);
	             MainActivity.this.startActivity(myIntentO);   
	            break;
	        }

	        case R.id.searchBtn: {
	            // search tree for matching debri
	        	 Toast.makeText(this, "search clicked", Toast.LENGTH_SHORT).show();
	        	 Intent myIntent = new Intent(MainActivity.this, SearchTree.class);
	             MainActivity.this.startActivity(myIntent);   
	            break;
	        }
	    }
	}
	
	
	
	public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

	
	
	public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.add:
          Toast.makeText(this, "Add", Toast.LENGTH_SHORT).show();
          return true;
        case R.id.delete:
          Toast.makeText(this, "Delete", Toast.LENGTH_SHORT).show();
          return true;
        case R.id.action_settings:
            Toast.makeText(this, "Settings", Toast.LENGTH_SHORT).show();
            AlertDialog.Builder alert = new AlertDialog.Builder(this);

            alert.setTitle("Generic Info");
            alert.setMessage("Ship Name");

            // Set an EditText view to get user input 
            final EditText input = new EditText(this);
            alert.setView(input);
               

            alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
              Editable value = input.getText();
              // Do something with value!
              
              }
            });

            alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog, int whichButton) {
                // Canceled.
              }
            });

            alert.show();
            return true;
        
        default:
          return super.onOptionsItemSelected(item);
        } 
    } 
	
	
	
	
	
	private File getOutputPhotoFile() throws IOException {
		  File directory = new File(Environment.getExternalStoragePublicDirectory(
		                Environment.DIRECTORY_PICTURES), getPackageName());
		  if (!directory.exists()) {
		    if (!directory.mkdirs()) {
		      Log.e(TAG, "Failed to create storage directory.");
		      return null;
		    }
		  }
		  /*
		  String timeStamp = new SimpleDateFormat("yyyMMdd_HHmmss", Locale.ENGLISH).format(new Date());
		  File exifVar =  new File(directory.getPath(), "IMG_" + timeStamp + ".jpg");
		  */
		  
		  File[] files = directory.listFiles();

		  if(files.length==0) {
		      // No images available
		      return new File("") ;
		  }

		  File newestFile = files[files.length-1];

		  File exifVar =  new File(directory.getPath() + File.separator + newestFile.getName());
		  
		  String mString = "Generic Text..";     
		  ExifInterface exif = new ExifInterface(exifVar.getAbsolutePath());
		  exif.setAttribute("UserComment", mString);
		  exif.saveAttributes();
		 
		    
		  exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE,
	        String.valueOf(latituteField.toString()));

		  exif.setAttribute(ExifInterface.TAG_GPS_LONGITUDE, 
	        String.valueOf(longitudeField.toString()));

		  exif.saveAttributes();
		 
		  return exifVar; 
		  
		  
		  
		  
	}
	  
	  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		  if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQ) {
		    if (resultCode == RESULT_OK) {
		      Uri photoUri = null;
		      if (data == null) {
		        Toast.makeText(this, "Image saved successfully", 
		                       Toast.LENGTH_LONG).show();
		        photoUri = fileUri;
		      } else {
		        photoUri = data.getData();
		        Toast.makeText(this, "Image saved successfully in: " + data.getData(), 
		                       Toast.LENGTH_LONG).show();
		      }
		      showPhoto(photoUri);
		    } else if (resultCode == RESULT_CANCELED) {
		      Toast.makeText(this, "Cancelled", Toast.LENGTH_SHORT).show();
		    } else {
		      Toast.makeText(this, "Callout for image capture failed!", 
		                     Toast.LENGTH_LONG).show();
		    }
		  }
		}
	  
	  
	 
	
	  
	  private void showPhoto(Uri photoUri) {
		  String filePath = photoUri.getEncodedPath();
		  File imageFile = new File(filePath);
		  
		  if (imageFile.exists()){
			 Drawable oldDrawable = photoImage.getDrawable(); 
			 if (oldDrawable != null) { 
				 ((BitmapDrawable)oldDrawable).getBitmap().recycle();
			}
		     Bitmap bitmap = BitmapFactory.decodeFile(imageFile.getAbsolutePath());
		     BitmapDrawable drawable = new BitmapDrawable(this.getResources(), bitmap);
		     photoImage.setScaleType(ImageView.ScaleType.FIT_CENTER);
		     photoImage.setImageBitmap(Bitmap.createScaledBitmap(bitmap, 130, 110, false));
		  }
		  
		}
	  
	  
	  
	  
	  /* Request updates at startup */
	  @Override
	  protected void onResume() {
	    super.onResume();
	    locationManager.requestLocationUpdates(provider, 400, 1, this);
	  }

	  /* Remove the locationlistener updates when Activity is paused */
	  @Override
	  protected void onPause() {
	    super.onPause();
	    locationManager.removeUpdates(this);
	  }




	@Override
	public void onLocationChanged(Location location) {
		// TODO Auto-generated method stub
		int lat = (int) (location.getLatitude());
	    int lng = (int) (location.getLongitude());
	    latituteField.setText("Lat: " + String.valueOf(lat));
	    longitudeField.setText("Lon: " + String.valueOf(lng));
	}




	@Override
	public void onStatusChanged(String provider, int status, Bundle extras) {
		// TODO Auto-generated method stub
		
	}




	@Override
	public void onProviderEnabled(String provider) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "Enabled new provider " + provider,
		        Toast.LENGTH_SHORT).show();
		
	}




	@Override
	public void onProviderDisabled(String provider) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "Disabled provider " + provider,
		        Toast.LENGTH_SHORT).show();
		
	}


	

	
}