You can try using the a backslash followed by a "u" and then the unicode value for the character, for example the unicode value of the double quote is
" -> U+0022
Therefore if you were setting it as part of text in XML in android it would look something like this,
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text=" \u0022 Showing double quotes \u0022 "/>
This would produce a text in the TextView roughly something like this
" Showing double quotes "
You can find unicode of most symbols and characters here www.unicode-table.com/en