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Issue Link:

What is the link to the issue this cherry-pick is addressing?

#172250

Changelog Description:

Explain this cherry pick in one line that is accessible to most Flutter developers. See best practices for examples

Fixes a bug where TextInput.hide call incorrect clears the text in the active text field.

Impact Description:

What is the impact (ex. visual jank on Samsung phones, app crash, cannot ship an iOS app)? Does it impact development (ex. flutter doctor crashes when Android Studio is installed), or the shipping production app (the app crashes on launch)

If an app calls TextInput.hide to hide the software keyboard, the user input in the current active text field will also be erased. It impacts the production app.
The framework itself doesn't seem to call TextInput.hide in a way that would affect the user.

Workaround:

Is there a workaround for this issue?

Yes, in theory, developers can store and restore the TextEditingValue, when they need to call TextInput.hide, to undo the clear. However I suspect the reverted PR may also break voiceover.

Risk:

What is the risk level of this cherry-pick?

• Low
• Medium
• High

This is a revert of #160653. The reverted PR was merged in February, and the previous implementation was introduced in 2021.

Test Coverage:

Are you confident that your fix is well-tested by automated tests?

• Yes
• [] No

This change is a revert so the added test will also get reverted.

Validation Steps:

What are the steps to validate that this fix works?

To verify the fix on master (it has already landed on master), run this app:

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: SizedBox(
          child: ListView(
            children: [
              TextButton(
                child: Text('hide keyboard'),
                onPressed: () =>
                    SystemChannels.textInput.invokeListMethod("TextInput.hide"),
              ),
              TextField(
                controller: TextEditingController(text: '️a' * 20),
                maxLines: 1,
              ),
            ],
          ),
        ),
      ),
    );
  }
}

focus the text field and then click the hide keyboard button. The text "aaaaaa..." should remain after the button is clicked.