How to change background color of bitmap to transparent and background should not drag?

Question

I used:

Bitmap bitmap= Bitmap.createBitmap(255, 255, Bitmap.Config.RGB_565); 
Canvas canvas = new Canvas(bitmap);

Background color is black....

If I use:

Bitmap.Config.ARGB_8888;

background color is white...

my question is that How to change background color of bitmap to transparent and background should not drag? only center image have to drag...

plz can anybody say this solution or example....

Bitmaps does not have transparent concept. I think you need to use PNG type. — Khaled Annajar, Sep 09 '13 at 11:35

score 2 · Answer 1 · answered Nov 03 '12 at 14:29

2

Try to add

Bitmap bitmap= Bitmap.createBitmap(255, 255, Bitmap.Config.ARGB_8888);

after that try this line (A is alpha value interval is 0-255 and 0 is fully transparent).

bitmap.eraseColor(Color.argb(AAA,RRR,GGG,BBB));

answered Nov 03 '12 at 14:29

Barış Çırıka

score 2 · Answer 2 · answered Nov 19 '16 at 10:14

2

Try to this

 bitmap.eraseColor(getResources().getColor(R.color.thumb));

answered Nov 19 '16 at 10:14

Virani Ashish

score 0 · Answer 3 · edited May 23 '17 at 10:29

0

you need to check every pixel of image and change its color.

You will get your answer in this link Refer This

edited May 23 '17 at 10:29

Community

answered Nov 03 '12 at 12:13

Arvind Kanjariya

thanks aravind....but i didnt get solution for this...i want a toast for background rect and another toast for bitmap image in ontouchevent by using if contion....can u help me – sam786 Nov 05 '12 at 05:31

3 Answers3