There are two ways, but the second way doesn't always work
You'll need:
A smartphone with internet
Twitter App
Procedure:
Download and install Photo Editor from the Play Store. It looks exactly like your gallery icon, except with a red dotted square on the background.
- After that, log into your Twitter.
- Click on a random picture.
- Screenshot it. If you don't know how, either Google/YouTube it, or find it in my other post, How To Screenshot on Android, iPhone/iPad/iTouch.
- Now, go to your Photo Editor, and click crop, and crop the picture.
Another way to do this...
- If you haven't already download Aviary.
- Go to your Twitter and click on a picture.
- Click on the options button.
- Then click save. I'm not yet sure where this saves the picture, but it should either be in your "100AVIARY" folder or in your Twitter folder.
UPDATE!!
Twitter finally allowed the saving of pictures!
- Find a picture on Twitter.
- Press the three dots on the top right corner.
- Press save.
- It should be in your "Twitter" folder.
You're welcome.