Comment enregistrer et supprimer une image Bitmap dans Blackberry Storm?

Question

J'ai une image bitmap prête. Maintenant, je veux enregistrer & le supprimer. Je fais comme ..

FileConnection fconn = (FileConnection)Connector.open("file:///store/home/user/StoredBitmap/"+picIndex+".bmp",Connector.READ_WRITE); 

     if(!fconn.exists()) 
      fconn.create(); 

     OutputStream out = fconn.openOutputStream(); 

     if(image == null) 
      System.out.println(" image null "); 
     else 
     { 
      out.write(byte[]); 
      out.close(); 
     } 

     fconn.close(); 

Pour simulateur dispositif de Blackberry Storm &, quel chemin pour donner au lieu de

"file:///store/home/user/StoredBitmap/"+picIndex+".bmp" 

J'ai créé Bitmap. Dans outputStream, comment l'écrire?

Utilisation de Blackberry 4.7 (Version: 4.7.0.41). Dans son simulateur, comment sauvegarder le Bitmap? Je le fais pour Blackberry Storm. Pour la suppression de ce bitmap, pouvons-nous utiliser la classe File ou utiliser la classe FileConnection?

&

Answer 1

Jetez un oeil à cette (lecture/écriture/suppression)

class Scr extends MainScreen implements FieldChangeListener { 
    ButtonField mWrite; 
    ButtonField mRead; 
    ButtonField mDelete; 

    String mFileName = System.getProperty("fileconn.dir.photos") 
      + "test.bmp"; 

    public Scr() { 
     mWrite = new ButtonField("Write file", 
        ButtonField.CONSUME_CLICK); 
     add(mWrite); 
     mWrite.setChangeListener(this); 

     mRead = new ButtonField("Read file", 
        ButtonField.CONSUME_CLICK); 
     add(mRead); 
     mRead.setChangeListener(this); 

     mDelete = new ButtonField("Delete file", 
        ButtonField.CONSUME_CLICK); 
     add(mDelete); 
     mDelete.setChangeListener(this); 
    } 

    public void fieldChanged(Field field, int context) { 
     if (mWrite == field) { 
      byte[] bytes = new byte[] { 1, 2, 1, 1 }; 
      writeFile(bytes, mFileName); 
      Dialog.inform("File " + mFileName + " saved"); 
     } else if (mRead == field) { 
      byte[] bytes = readFile(mFileName); 
      if (null != bytes) 
       Dialog.inform("File " + mFileName + " opened"); 
     } else if (mDelete == field) { 
      deleteFile(mFileName); 
      Dialog.inform("File " + mFileName + " deleted"); 
     } 

    } 

    private void writeFile(byte[] data, String fileName) { 
     FileConnection fconn = null; 
     try { 
      fconn = (FileConnection) Connector.open(fileName, 
        Connector.READ_WRITE); 
     } catch (IOException e) { 
      System.out.print("Error opening file"); 
     } 

     if (fconn.exists()) 
      try { 
       fconn.delete(); 
      } catch (IOException e) { 
       System.out.print("Error deleting file"); 
      } 
     try { 
      fconn.create(); 
     } catch (IOException e) { 
      System.out.print("Error creating file"); 
     } 
     OutputStream out = null; 
     try { 
      out = fconn.openOutputStream(); 
     } catch (IOException e) { 
      System.out.print("Error opening output stream"); 
     } 

     try { 
      out.write(data); 
     } catch (IOException e) { 
      System.out.print("Error writing to output stream"); 
     } 

     try { 
      fconn.close(); 
     } catch (IOException e) { 
      System.out.print("Error closing file"); 
     } 
    } 

    private byte[] readFile(String fileName) { 
     byte[] result = null; 
     FileConnection fconn = null; 
     try { 
      fconn = (FileConnection) Connector.open(fileName, 
          Connector.READ); 
     } catch (IOException e) { 
      System.out.print("Error opening file"); 
     } 

     if (!fconn.exists()) { 
      Dialog.inform("file not exist"); 
     } else { 

      InputStream in = null; 
      ByteVector bytes = new ByteVector(); 
      try { 
       in = fconn.openInputStream(); 
      } catch (IOException e) { 
       System.out.print("Error opening input stream"); 
      } 

      try { 
       int c = in.read(); 
       while (-1 != c) { 
        bytes.addElement((byte) c); 
        c = in.read(); 
       } 
       result = bytes.getArray(); 
      } catch (IOException e) { 
       System.out.print("Error reading input stream"); 
      } 

      try { 
       fconn.close(); 
      } catch (IOException e) { 
       System.out.print("Error closing file"); 
      } 
     } 
     return result; 
    } 

    private void deleteFile(String fileName) { 
     FileConnection fconn = null; 
     try { 
      fconn = (FileConnection) Connector.open(fileName, 
        Connector.READ_WRITE); 
     } catch (IOException e) { 
      System.out.print("Error opening file"); 
     } 

     if (!fconn.exists()) { 
      Dialog.inform("file not exist"); 
     } else { 
      try { 
       fconn.delete(); 
      } catch (IOException e1) { 
       System.out.print("Error deleting file"); 
      } 

      try { 
       fconn.close(); 
      } catch (IOException e) { 
       System.out.print("Error closing file connection"); 
      } 
     } 
    }