Store Image into SD Card using date and number

Question

i am using custom camera to capture images and saving into sd card using datetime, like below:

// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
                .format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator
                + "IMG_" + timeStamp + ".jpg");
return mediaFile;

But i have to make a small change in file name, like existing name looks like below:

IMG_20140312_162137.jpg

Now i want whenever user start capturing images, need to start counting from 001,

for an example for 1 image IMG_20140312_001.jpg, for 2 image IMG_20140312_002.jpg and so on.

Answer 1

String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
                .format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator
                + "IMG_" + timeStamp + getNextNumber() +".jpg");
return mediaFile;




public String getNextNumber(){
    SharedPreferences prefs = this.getSharedPreferences(
          "com.example.app", Context.MODE_PRIVATE);

    int default = 0;


    int value = prefs.getInt("PICTURE_COUNT", default); 
    prefs.edit().putInt("PICTURE_COUNT", ++value).commit();
    return convertToDesiredFormat(value);
}

String convertToDesiredFormat(int value){
      String toReturn = null;
      if (value > 99)
         toReturn = Integer.toString(value);
      else if (value > 9)
         toReturn = "0" + Integer.toString(value);
      else if (value >= 0)
         toReturn = "00" + Integer.toString(value);
      return toReturn;
}

Answer 2

then store the image count in one share preference and count increase as u click any no of picture and then again update share preference for next time simple because if u clear your app from stack then next time this count is have to start from last that why we use share preference

Answer 3

Append one counter at the end of your image name as below :

 int count=0;
 String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
            .format(new Date());
    File mediaFile;
    mediaFile = new File(mediaStorageDir.getPath() + File.separator
            + "IMG_" + timeStamp +" _00 "+ count +".jpg");
     count++;

    return mediaFile;

Answer 4

For this you will need to keep the track of the counter with shared preference when your application reopens

SharedPreferences pref;

    SharedPreferences.Editor edit;

        pref = context.getSharedPreferences("counter", 
                Context.MODE_PRIVATE);
        edit = pref.edit();

edit.putInt("count" ,count++);
edit.commit();


and the get the count when next time you use the count

mediaFile = new File(mediaStorageDir.getPath() + File.separator
                + "IMG_" + timeStamp +pref.getString("count", 0))+ ".jpg");