Quickly add characters and words on the fly using this Android app.
Type in a word or character (not pinyin) and then click add. It will open up a browser window in the same way the desktop bookmarklet works. If in China change the domain on the bottom to CN. You may be required to log in.
Give it a try:
http://play.google.com/store/apps/details?id=com.jernung.addtoskritter