android.text

  • The Android text framework provides interfaces and classes for manipulating text, including handling editable text, input filtering, and markup objects.

  • Editable and Spannable are key interfaces for text that can be changed and have markup attached, respectively.

  • SpannableString and SpannableStringBuilder are classes for immutable and mutable text with markup support.

  • InputFilters such as InputFilter.AllCaps and InputFilter.LengthFilter control changes made to editable text.

  • Utility classes like Selection and TextUtils offer methods for cursor management, string operations, and more.

Interfaces

Editable This is the interface for text whose content and markup can be changed (as opposed to immutable text like Strings). 
GetChars Please implement this interface if your CharSequence has a getChars() method like the one in String that is faster than calling charAt() multiple times. 
InputFilter InputFilters can be attached to Editables to constrain the changes that can be made to them. 
InputType Bit definitions for an integer defining the basic content type of text held in an Editable object. 
NoCopySpan This interface should be added to a span object that should not be copied into a new Spenned when performing a slice or copy operation on the original Spanned it was placed in. 
Spannable This is the interface for text to which markup objects can be attached and detached. 
Spanned This is the interface for text that has markup objects attached to ranges of it. 
SpanWatcher When an object of this type is attached to a Spannable, its methods will be called to notify it that other markup objects have been added, changed, or removed. 
TextUtils.StringSplitter An interface for splitting strings according to rules that are opaque to the user of this interface. 
TextWatcher When an object of a type is attached to an Editable, its methods will be called when the text is changed. 

Classes

Editable.Factory Factory used by TextView to create new Editables. 
InputFilter.AllCaps This filter will capitalize all the lower case letters that are added through edits. 
InputFilter.LengthFilter This filter will constrain edits not to make the length of the text greater than the specified length. 
NoCopySpan.Concrete Convenience equivalent for when you would just want a new Object() for a span but want it to be no-copy. 
Selection Utility class for manipulating cursors and selections in CharSequences. 
Spannable.Factory Factory used by TextView to create new Spannables. 
SpannableString This is the class for text whose content is immutable but to which markup objects can be attached and detached. 
SpannableStringBuilder This is the class for text whose content and markup can both be changed. 
SpannedString This is the class for text whose content and markup are immutable. 
TextUtils  
TextUtils.SimpleStringSplitter A simple string splitter. 

Enums

TextUtils.TruncateAt