hmApp.registerKeyEvent(callback)

Register keystroke event listener.

Type

(callback: (key: Key, action: Action) => boolean) => void

Parameters

Callback

Description	Required	Type	Default
Keystroke event callback function, return value false does not skip the default behavior, true skips the default behavior.	YES	(key: Key, action: Action) => boolean	-

Key

Description
Support BACK, SELECT, HOME, UP, DOWN, SHORTCUT, refer to the code example for specific usage, Key layout position reference Physical keys

Action

Description
Support CLICK, LONG_PRESS, DOUBLE_CLICK, RELEASE, PRESS, refer to the code example for specific usage

Code example

//Registering a key listener Repeated registration of a JsApp will cause the last registered callback to fail.
hmApp.registerKeyEvent(function (key, action) {
  console.log('receive key code:' + code + ' action:' + action)
  let msg = ''
  let ret = false
  switch (key) {
    case hmApp.key.BACK:
      msg = 'back.'
      break
    case hmApp.key.SELECT:
      msg = 'select.'
      break
    case hmApp.key.HOME:
      msg = 'home.'
      ret = true //Skip the default home button handling.
      break
    case hmApp.key.UP:
      msg = 'up.'
      break
    case hmApp.key.DOWN:
      msg = 'down.'
      break
    case hmApp.key.SHORTCUT:
      msg = 'shortcut.'
      break
    default:
      msg = 'none.'
      break
  }

  switch (action) {
    case hmApp.action.CLICK:
      msg = msg + 'click'
      break
    case hmApp.action.LONG_PRESS:
      msg = msg + 'longPress'
      break
    case hmApp.action.DOUBLE_CLICK:
      msg = msg + 'doubleClick'
      break
    case hmApp.action.RELEASE:
      msg = msg + 'release'
      break
    case hmApp.action.PRESS:
      msg = msg + 'press'
      break
    default:
      msg = msg + 'none'
      break
  }

  console.log('receive key:' + msg)
  return ret
})