android set hidden the keyboard on press enter (in a EditText)

Question

When my user press Enter on the virtual android \"user validate entry!\" keyboard my keyboard stay visible! (Why?)

Here my Java code...

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Answer 1

I am create a custom component who extends AutoCompleteTextView, like in the example below:

public class PortugueseCompleteTextView extends AutoCompleteTextView {
...
@Override
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
    if (event != null &&  (event.getKeyCode() == KeyEvent.KEYCODE_BACK)) {
        InputMethodManager inputManager =
                (InputMethodManager) getContext().
                        getSystemService(Context.INPUT_METHOD_SERVICE);
        inputManager.hideSoftInputFromWindow(
                this.getWindowToken(),
                InputMethodManager.HIDE_NOT_ALWAYS);
    }
    return super.onKeyPreIme(keyCode, event);
}

I am using this code in the AlertDialog.Builder, but is possible to be using to Activity.