Android: softkeyboard not showing up

Question

I have 2 EditTexts in the MainActivity Layout. If i run the application normally the 1st EditText gets focused but the softkeyboard is not openned.

but when i used t

Answer 1

    et2.clearFocus();
    et2.requestFocus();
    InputMethodManager mInputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
    mInputMethodManager.showSoftInput(et2, InputMethodManager.SHOW_IMPLICIT);

I meet the problem on Android N platform and resolve it by refocusing the editview. I don`t know the real reason why the editview should be cleared first,but it works fine for me.