Seekbar's thumb animation while dragging

Question

I am creating a seekbar with custom thumb. So my thumb it layeredDrawable. So I want to resize my thumb image while dragging thumb.

I mean when I will drag my thumb... thumb size will increase and seekbar position should not be change.

Please help me and thanks in advance.

Answer 1

Changing the seek bars thumb size as you slide requires some code

android:thumb="@drawable/round"

Code

private SeekBar seekBar;

in OnCreate add

seekBar = (SeekBar) findViewById(R.id.mySeekBarID);

        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

            int progress = 0;

            @Override

            public void onProgressChanged(SeekBar seekBar, int progresValue, boolean fromUser) {

                progress = progresValue;

                Resources res = getResources();
                Drawable thumb = res.getDrawable(R.drawable.round);
                int h = progress / 10;
                int w = h;
                Bitmap bmpOrg = ((BitmapDrawable) thumb).getBitmap();
                Bitmap bmpScaled = Bitmap.createScaledBitmap(bmpOrg, w, h, true);
                Drawable newThumb = new BitmapDrawable(res, bmpScaled);
                newThumb.setBounds(0, 0, newThumb.getIntrinsicWidth(), newThumb.getIntrinsicHeight());
                seekBar.setThumb(newThumb);

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

Tested and works as expected. ie as you move the thumb it gets smaller to the left and larger to the right

This line here int h = progress / 10;` is what calculates the new thumb size as you slide so you will need to play around with some math to get the exact result you require