Missing voice input button on the standard keyboard - Lollipop Posting and answering this to help others experiencing the same issue as me. This was also asked here.

If only one keyboard is enabled, i.e. Google Keyboard - English (US), the keyboard shown whenever text input is needed sometimes does not have a microphone icon (or any option to select voice typing).

Some things that may not show:


Microphone icon (in older Android versions, this was beside the space bar on the on-screen keyboard)
Pressing and holding space bar does not trigger the input selection screen (that normally would have featured voice typing as an option).


Please refer to my own answer below
https://android.stackexchange.com/a/104896/198
Try installing the Google application from the Play Store.

I disabled the Google App on my phone and the voice commands were gone from the keyboard. When I re-enabled it, the microphone icon was back. Hope that helps.