How to clear focus and remove keyboard on Android?

Make sure your EditText XML has :

android:id="@+id/myEditText"    
android:imeOptions="actionDone"

Then set listener to your EditText (with Kotlin, and from a fragment):

myEditText.setOnEditorActionListener({ v, actionId, event ->
            if (actionId == EditorInfo.IME_ACTION_DONE) {
                myEditText.clearFocus()
                val imm = activity.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
                imm.hideSoftInputFromWindow(view!!.windowToken, 0)    
            }
            false
        })

InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(editTextField.getWindowToken(), 0);

In the layout XML file, specify an imeOption on your EditText:

android:imeOptions="actionGo"

Next, add an action listener to your EditText in the Activity's java file

    mYourEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            if (actionId == EditorInfo.IME_ACTION_GO) {
                // hide virtual keyboard
                InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(mYourEditText.getWindowToken(), 0);
                return true;
            }
            return false;
        }
    });

Where mYourEditText is an EditText object