Question

Need to add it to textview, for example, standard java-code.

Answer 1

What do you exactly mean? You may want to change Typeface of TextView to monospace, this will make your TextView look similar to code block here at stackoverflow.

This font is monospace

Code to make it look like this:

  <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:typeface="monospace"
        android:text="This font is monospace" />

or in Java:

yourTextview.setTypeface(Typeface.MONOSPACE, Typeface.NORMAL);

Edit:

So, you need some Java code formatting library, the best would be if it returned result in HTML code, so it could be easily put into TextView.

I don’t know if there is something like this for free, but here are few resources you may be interested in:

How to pretty print XML from Java?

Stand-alone Java code formatter/beautifier/pretty printer?

Edit2:

You may also use one of these JavaScript libraries:

1. http://alexgorbatchev.com/SyntaxHighlighter/

2. http://code.google.com/p/google-code-prettify/

along with custom WebView to show pretty formatted code.