MvpFragment.java

package com.vijay.jsonwizard.mvp;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.View;
import android.view.inputmethod.InputMethodManager;

public abstract class MvpFragment<P extends MvpPresenter, VS extends ViewState> extends BaseFragment<VS> implements
        MvpView {

    protected P presenter;

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        // Create the presenter if needed
        if (presenter == null) {
            presenter = createPresenter();
        }
        presenter.attachView(this);
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        presenter.detachView(getRetainInstance());
    }

    protected abstract P createPresenter();

    public void hideSoftKeyboard() {
        // Check if no view has focus:
        View view = getActivity().getCurrentFocus();
        if (view != null) {
            InputMethodManager inputManager = (InputMethodManager) getActivity().getSystemService(
                    Context.INPUT_METHOD_SERVICE);
            inputManager.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }
}