What methods can be used to input text in applications or systems?

Text input in applications and systems can be performed using the following methods:

• Keyboard — the most common method, including physical and virtual (screen) keyboards.
• Voice input — speech recognition and conversion to text.
• Handwriting input — recognition of handwritten text using a stylus or finger.
• Auto-completion and suggestions — input using proposals and auto-correction.
• Import from files — uploading text from documents or clipboard.

In Flutter, the TextField widget is usually used for text input, which opens the keyboard and handles user input.