title: how to always save image with new name and delete previouse one (android)
body: <p>i am working on a wallpaper app in which i am saving a image with same name and sending it to gallery intent.</p>
  
  <p>because of saving every image with same name i am having problem of getting same image every time in gallery intent.</p>
  
  <p>what happening is new image is replacing but i am getting older image in gallery intent.
  new image replace older image but still gallery intent shows older image instead of new image</p>
  
  <p>so i want to save image with new name every time but also delete older saved image.</p>
  
  <p>Note: always save image as image++ but also delete previous image too.</p>
  
  <p>my code:</p>
  
  <pre><code>public void setAsWallpaper(Bitmap bitmap) {
  
          String dirname2 = "/Wallpaper/";
  
          File myDir2 = new File(Environment.getExternalStorageDirectory()
                  .getPath() + dirname2);
  
          myDir2.mkdirs();
  
          String fname2 = "image" + ".jpg";
          File file2 = new File(myDir2, fname2);
  
          if (file2.exists())
              file2.delete();
          try {
              FileOutputStream out = new FileOutputStream(file2);
              bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
              out.flush();
              out.close();
              success = true;
  
          } catch (Exception e) {
              Toast.makeText(_context, "failed", Toast.LENGTH_SHORT).show();
          }
  
          if (success) {
  
              Intent intent = new Intent();
               intent.setAction(Intent.ACTION_ATTACH_DATA);
               intent.setDataAndType(Uri.parse("file://"
               + "/sdcard/Wallpaper/image.jpg"), "image/*");
               intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
               _context.startActivity(intent);
  
          } else {
  
              Toast.makeText(_context, "failed", Toast.LENGTH_SHORT).show();
  
          }
  
      }
  </code></pre>