Android Open Source - Operation-Valkyrie File Manager

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License

The source code is released under:

Terms and conditions Preamble: This Agreement, signed on Jun 10, 2012 [hereinafter: Effective Date] governs the relationship between the Enduser, a private person, (hereinafter: Licensee) and Paul N...

Java Source Code

package valkyrie.file;
//from w  w w . j a v a2 s  .  c o m
/**
 * 
 * COPYRIGHT: Paul Neuhold, Laurenz Theuerkauf, Alexander Ritz, Jakob Schweighofer, Milo Tischler
 * ? Milo Tischler, Jakob Schweighofer, Alexander Ritz, Paul Neuhold, Laurenz Theuerkauf 
 *
 */
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;

/**
 * 
 * @author madhatter Filemanager to save, load and delete Files from SD Card
 */

public class FileManager {
  final static String TAG = "FileManager";
  final static String IMGNAME = "IMG";
  final static String IMGCOUNT = "0000";
  private boolean SDMOUNTED = false; // check if SD Card is mounted
  private Context context;
  final static String SDPATH = Environment.getExternalStorageDirectory().toString() + "/Valkyrie/Gallery/";
  final static String THUMBPATH = Environment.getExternalStorageDirectory().toString() + "/Valkyrie/Thumbnls/";

//  public FileManager() {
//    initFileManager();
//  }

  public FileManager(Context context) {
    this.context = context;
    try {
      initFileManager();
    } catch (Exception e) {
      Log.e(TAG, "ERROR, couldnt initialize Filemanager");
    }

  }

  /**
   * init method checks if the File /Valkyrie/Gallery/ and /Valkyrie/Thumbnls/ is already created. if not it will be
   * created
   * 
   * @return
   */
  private boolean initFileManager() {
    String state = Environment.getExternalStorageState();
    File file = new File(SDPATH);
    File thumb = new File(THUMBPATH);
    if (Environment.MEDIA_MOUNTED.equals(state)) {
      SDMOUNTED = true;
      if (!file.exists())
        file.mkdirs();
      if (!thumb.exists())
        thumb.mkdirs();
      return true;

    } else {
      SDMOUNTED = false;
      Toast.makeText(context, "WARNING: SD Card not mounted!", Toast.LENGTH_SHORT).show();
      Log.e(TAG, "Error SD-Card not mounted");
      return false;
    }
  }

  /**
   * save an Image as PNG on SD Card at: .../Valkyrie/Gallery/
   * 
   * @param bitmap
   */
  public void saveImageToGallery(Bitmap bitmap) {
    if (SDMOUNTED) {
      OutputStream fOut = null;
      File directory = new File(SDPATH);
      File files[] = directory.listFiles();
      File file;

      if (files.length > 0) {
        int highestnumber = 0;
        for (File f : files) {
          if (f.exists()) {
            int newhighest = Integer.parseInt(getLatestImage().substring(3, getLatestImage().length() - 4));
            if (newhighest >= highestnumber) {
              highestnumber = newhighest + 1;
            }
          }
        }
        String filenumber = IMGCOUNT + highestnumber;
        filenumber = filenumber.substring(filenumber.length() - 4);

        file = new File(SDPATH, IMGNAME + filenumber + ".png");
      } else {
        String filenumber = IMGCOUNT + 1;
        filenumber = filenumber.substring(filenumber.length() - 4);
        file = new File(SDPATH, IMGNAME + filenumber + ".png");
      }

      try {
        fOut = new FileOutputStream(file);
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);
        fOut.flush();
        fOut.close();
      } catch (FileNotFoundException e) {
        Log.e("FileManager", e.toString());
      } catch (IOException e) {
        Log.e(TAG, e.toString());
        e.printStackTrace();
      }
      bitmap.recycle();
    } else
      Toast.makeText(context, "WARNING: SD Card not mounted!", Toast.LENGTH_SHORT).show();
  }

  public void saveImageToInternal(Bitmap bitmap) {
    // TODO laurenz
  }

  /**
   * Get an Image from SD Card
   */

  public Bitmap loadImageFromGallery(String imageName) {
    if (SDMOUNTED) {
      InputStream is = FileManager.class.getResourceAsStream(SDPATH + imageName);
      return BitmapFactory.decodeStream(is);
    } else
      Toast.makeText(context, "WARNING: SD Card not mounted!", Toast.LENGTH_SHORT).show();
    return null;
  }

  public Bitmap loadImageFromInternal(String imageName) {
    if (SDMOUNTED) {
      File imageFile = new File(SDPATH + imageName);
      if (imageFile.exists()) {
        InputStream is = FileManager.class.getResourceAsStream(SDPATH + imageName);
        return BitmapFactory.decodeStream(is);
      } else
        return null;
    } else
      return null;
  }

  /**
   * Delete an Image and its Thumbnail from the SD Card
   * 
   * @param imageName
   */
  public void deleteImageFromGallery(String imageName) {
    if (SDMOUNTED) {
      File fileToDelete = new File(SDPATH + imageName);
      File thumbToDelete = new File(THUMBPATH + imageName);
      if (fileToDelete.exists()) {
        fileToDelete.delete();
        thumbToDelete.delete();
      }
    } else
      Toast.makeText(context, "WARNING: SD Card not mounted!", Toast.LENGTH_SHORT).show();
  }

  /**
   * get the name of the latest Image on the SD Card
   * 
   * @return
   */
  public String getLatestImage() {
    File directory = new File(SDPATH);
    String imageName = null;
    File files[] = directory.listFiles();
    int highestnumber = 0;
    for (File f : files) {
      if (f.exists()) {
        int newhighest = Integer.parseInt(f.getName().substring(3, f.getName().length() - 4));
        if (newhighest >= highestnumber) {
          highestnumber = newhighest + 1;
          imageName = f.getName();
        }
      }
    }
    if (imageName != null)
      return imageName;
    else
      return "Error";
  }
}

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