Android Open Source - Android-Project-Manager Photo Manager

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.vaquerosisd.projectmanager;
//from  w w w . jav a 2 s.  c  o  m
import java.io.File;
import java.io.IOException;
import java.util.List;

import com.vaquerosisd.database.ProjectOperations;
import com.vaquerosisd.dialog.DeletePhotoDialog;
import com.vaquerosisd.object.PhotoRef;
import com.vaquerosisd.utils.OnSwipeListener;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.app.NavUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Toast;

public class PhotoManager extends Activity {
  
  ProjectOperations db;    //Database Operations
  int projectId;      //Project ID where the picture belong
  String projectName;      //Project name associated to the Project ID
  boolean photoContent;
  List<PhotoRef> photosList;
  
  ImageView photoDisplay;
  int photoIndex;
  
  Button previousPhoto, nextPhoto, deletePhoto;
  
  File storageDir;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_photos_manager);
    
    //Initialize database
    db = new ProjectOperations(this);
    db.open();
    
    storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES + "/ProjectManager");
    
    //Get intent from Projects.class
    Bundle data = getIntent().getExtras();
    projectId = data.getInt("ProjectID");
    projectName = data.getString("ProjectName");
    
    photoDisplay = (ImageView)findViewById(R.id.photoDisplay);
    ImageButton previousPhoto = (ImageButton) findViewById(R.id.photoManger_PreviousPhoto);
    ImageButton nextPhoto = (ImageButton) findViewById(R.id.photoManger_NextPhoto);
    
    photoDisplay.setOnTouchListener(new OnSwipeListener(this) {
      @Override
        public void onSwipeRight() {
        moveToPreviousPhoto();
        }      
      @Override
        public void onSwipeLeft() {
        moveToNextPhoto();
        }
    });
    
    previousPhoto.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View arg0) {
        moveToPreviousPhoto();
      }
    });
    
    nextPhoto.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        moveToNextPhoto();  
      }
    });
    
    getPhotosList();  
    setPhoto();    
  }
  
  private final int REQUEST_IMAGE_CAPTURE = 0;
  
  String currentPhotoPath;
  
  public void takePhoto()
    {
      Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
      if (takePhotoIntent.resolveActivity(getPackageManager()) != null) {
        
        File photoFile = null;
          try {
              photoFile = createImageFile(projectName + "_Photo");
          } catch (IOException ex) {}
          
          if (photoFile != null) {
              takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
              startActivityForResult(takePhotoIntent, REQUEST_IMAGE_CAPTURE);
          }
      }
    }
  
  public void deletePhoto()
  {
    String localPath = photosList.get(photoIndex).getPhotoPath();
    File photoFile = new File(storageDir + "/" + localPath);
    
    db.deletePhoto(photosList.get(photoIndex).getPhotoId());
    getPhotosList();
    setPhoto();
    
    if(photoFile.exists())
      photoFile.delete();      
  }
  
  public void setPhoto()
  {
    if(photosList.size() > 0 && photoIndex < photosList.size())
    {
      photoContent = true;       
      currentPhotoPath = photosList.get(photoIndex).getPhotoPath();
      photoDisplay.setImageURI(Uri.parse("file:" + storageDir + "/" + currentPhotoPath));
      invalidateOptionsMenu();
    }
    else
    {
      photoContent = false;
      photoDisplay.setImageBitmap(null);
      invalidateOptionsMenu();
    }
  }
  
  public boolean validatePhoto()
  {
    //If the database has no entries no validations are required
    if(photosList.size() == 0)
      return true;
    
    if (!storageDir.exists()) {
      db.deleteAllPhotos();
      Toast.makeText(getApplicationContext(), "The Project Manager picture folder has been deleted externally.", Toast.LENGTH_LONG).show();
      return false;
        }
    
    File photoFile = new File(storageDir + "/" + photosList.get(photoIndex).getPhotoPath());
    if(!photoFile.exists())
    {
      db.deletePhoto(photosList.get(photoIndex).getPhotoId());
      Toast.makeText(getApplicationContext(), "The target photo has been deleted externally.", Toast.LENGTH_LONG).show();
      return false;
    }
      
    return true;
  }
  
  private void getPhotosList()
  {
    do
    {
      photosList = db.getAllPhotos(projectId);
      photoIndex = photosList.size() - 1;
    } while(!validatePhoto());
  }
  
  public void moveToPreviousPhoto()
  {
    photoIndex = Math.max(photoIndex - 1, 0);
    
    if(!validatePhoto())
      getPhotosList();
    
    setPhoto();
    
  }
  
  public void moveToNextPhoto()
  {
    photoIndex = Math.min(photoIndex + 1, photosList.size() - 1);
    
    if(!validatePhoto())
      getPhotosList();
    
    setPhoto();
  }
  
  @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        
      if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        db.addPhoto(currentPhotoPath, projectId);
        getPhotosList();
        setPhoto();
            
        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file:" + storageDir + "/" + currentPhotoPath));     
        sendBroadcast(intent);
        }
    }
  
  private File createImageFile(String imageFileName) throws IOException {
    
        if (!storageDir.exists()) {
            storageDir.mkdir();
        }
        
        
        File image = File.createTempFile(
            imageFileName,  /* prefix */
            ".jpg",         /* suffix */
            storageDir      /* directory */
        );
        
        currentPhotoPath = image.getName();      
        
        return image;
    }
  
  @Override
  public boolean onCreateOptionsMenu(Menu menu)  {
    getMenuInflater().inflate(R.menu.photos_menu, menu);
      return true;
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      switch (item.getItemId()) {
      
      // Respond to the action bar's Up/Home button
      case android.R.id.home:
        Intent navigationIntent = NavUtils.getParentActivityIntent(this);
      navigationIntent.putExtra("ProjectID", projectId);
      navigationIntent.putExtra("ProjectName", projectName);
          NavUtils.navigateUpTo(this, navigationIntent);
          return true;
      case R.id.actionBar_AddPhotoIcon:
        takePhoto();
        return true;
      case R.id.actionBar_DeletePhotoIcon:
        DeletePhotoDialog.newInstance().show(getFragmentManager(), "dialog");
        return true;
        
      }
      return super.onOptionsItemSelected(item);
  }
  
  @Override
  public boolean onPrepareOptionsMenu (Menu menu){
    if(photoContent)
      menu.findItem(R.id.actionBar_DeletePhotoIcon).setVisible(true);
    else
      menu.findItem(R.id.actionBar_DeletePhotoIcon).setVisible(false);
    return true;
  }
}

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