修改路径：android-8.1\frameworks\base\packages\SettingsProvider\res\values\defaults.xml
将 ：
<bool name="def_show_ime_with_hard_keyboard">false</bool>
改成 ：true
<!-- Default for Settings.Secure.MULTI_PRESS_TIMEOUT --><integer name="def_multi_press_timeout_millis">300</integer><!-- Default for Settings.Secure.SHOW_IME_WITH_HARD_KEYBOARD -->- <bool name="def_show_ime_with_hard_keyboard">false</bool>+ <bool name="def_show_ime_with_hard_keyboard">true</bool><!-- Default for Settings.System.POINTER_SPEED --><integer name="def_pointer_speed">0</integer><!-- Default for DTMF tones enabled --><bool name="def_dtmf_tones_enabled">true</bool><!-- Default for UI touch sounds enabled -->