show or hide keyboard manually from code

InputManager.java

import android.app.Activity;
import android.content.Context;
import android.os.IBinder;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.View;
import android.view.inputmethod.InputMethodManager;

import timber.log.Timber;

public class InputManager {

    private InputManager() {
    }

    public static void showSoftKeyboard(@NonNull Activity activity, @NonNull View view) {
        if (view.requestFocus()) {
            InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT);
        }
    }

    public static void hideSoftKeyboard(@NonNull Activity activity, @Nullable View view) {
        InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);

        IBinder windowToken;
        if (view != null) {
            windowToken = view.getWindowToken();
            imm.hideSoftInputFromWindow(windowToken, 0);
        }else if (activity.getCurrentFocus() != null) {
            windowToken = activity.getCurrentFocus().getWindowToken();
            imm.hideSoftInputFromWindow(windowToken, 0);
        } else {
            Timber.w("Soft keyboard was not hided");
        }
    }
}