RecyclerView ItemTouchHelper Buttons on Swipe

Question

I am trying to port some iOS functionality to Android.

I intent to create a table where on swipe to the left shows 2 button: Edit and Delete.

I have

Answer 1

If you want button(s) on left side as well when swipe in the other direction, just try to add this simple lines in the existing answer:

1. In the drawButtons method:

   private void drawButtons(Canvas c, View itemView, List buffer, int pos, float dX) {
       float right = itemView.getRight();
       float left = itemView.getLeft();
       float dButtonWidth = (-1) * dX / buffer.size();
   
       for (UnderlayButton button : buffer) {
           if (dX < 0) {
               left = right - dButtonWidth;
               button.onDraw(
                       c,
                       new RectF(
                               left,
                               itemView.getTop(),
                               right,
                               itemView.getBottom()
                       ),
                       pos, dX //(to draw button on right)
               );
   
               right = left;
           } else if (dX > 0) {
               right = left - dButtonWidth;
               button.onDraw(c,
                       new RectF(
                               right,
                               itemView.getTop(),
                               left,
                               itemView.getBottom()
                       ), pos, dX //(to draw button on left)
               );
   
   
           }
       }
   }
   

2. In the onDraw method check the value of dX and set the text and the colour of the buttons:

   public void onDraw(Canvas c, RectF rect, int pos, float dX) {
           Paint p = new Paint();
   
           // Draw background
   
           if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
   
   
               if (dX > 0)
                   p.setColor(Color.parseColor("#23d2c5"));
               else if (dX < 0)
                   p.setColor(Color.parseColor("#23d2c5"));
   
               c.drawRect(rect, p);
   
   
               // Draw Text
               p.setColor(Color.WHITE);
               p.setTextSize(36);
               //  p.setTextSize(LayoutHelper.getPx(MyApplication.getAppContext(), 12));
   
               Rect r = new Rect();
               float cHeight = rect.height();
               float cWidth = rect.width();
               p.setTextAlign(Paint.Align.LEFT);
               p.getTextBounds(text, 0, text.length(), r);
   
               float x = cWidth / 2f - r.width() / 2f - r.left;
               float y = cHeight / 2f + r.height() / 2f - r.bottom;
               if (dX > 0) {
                   p.setColor(Color.parseColor("#23d2c5"));
                   c.drawText("Reject", rect.left + x, rect.top + y, p);
               } else if (dX < 0) {
   
                   c.drawText(text, rect.left + x, rect.top + y, p);
               }
               clickRegion = rect;
               this.pos = pos;
           }
   
       }