Can't get keyboard to load onCreate()

My aim is to get the keyboard to open as soon as the app is loaded. Using this code,

InputMethodManager inputMgr = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
                  inputMgr.toggleSoftInput(0, 0);`

on a button, I can get the keyboard to load when the button is pressed. However, when placed in the override onCreate() section, not开发者_运维知识库hing happens.

Add the following line to the activity in AndroidManifest.xml

android:windowSoftInputMode="stateVisible|adjustPan"