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[Android] Keyboard events fired for resizing side-by-side apps #16574

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@adierkens

Description

@adierkens

Is this a bug report?

Yes.

Have you read the Contributing Guidelines?

Yes.

Environment

Environment:

  • OS: macOS Sierra 10.12.6
  • Node: 6.5.0
  • Yarn: 0.22.0
  • npm: 4.1.1
  • Watchman: 4.7.0
  • Xcode: Xcode 9.0 Build version 9A235
  • Android Studio: 2.2 AI-145.3537739

Packages: (wanted => installed)

  • react: 16.0.0-alpha.12 => 16.0.0-alpha.12
  • react-native: ^0.48.4 => 0.48.4

Target Platform: Android (API >= 25)

Steps to Reproduce

  1. Setup a keyboard event listener for keyboardDidShow and keyboardDidHide:
import { Keyboard } from 'react-native';

Keyboard.addListener('keyboardDidShow', () => {
    console.log('keyboardDidShow');
});

Keyboard.addListener('keyboardDidHide', () => {
    console.log('keyboardDidHide');
});
  1. On an Android tablet (API 25+), enter split-screen mode (long press the square in the bottom thing), and drag to resize the react-native view smaller. Everytime the view goes from taller to shorter, both keyboard events fire.

Expected Behavior

  • Since there's no keyboard on the screen, and no input that could potentially trigger one, I wouldn't expect any keyboard events to be published.

Actual Behavior

  • Keyboard events are fired when no keyboard is in sight.

resize_keyboard

Note the console logs for keyboard events in the debugger.

I suspect it's due to ReactRootView checking to see if the screen size shrunk by at least the height of a keyboard (which in this case it did), and it thinks that the viewport change was caused by a keyboard poping up.

ReactRootView.java#checkForKeyboardEvents

Reproducible Demo

https://snack.expo.io/rkKcJ1W0W
-- or --
https://gist.github.com/adierkens/f7ea7c7dbd6b9da18b9fc6f2b2e0a664

Note: split screen mode is only API 25+, since the snack preview only supports 21 and 22, the preview doesn't exhibit the bug behavior.

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