CartFragment

package com.centaury.catalogkue.ui.cart;

import android.arch.lifecycle.Observer;
import android.arch.lifecycle.ViewModelProviders;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.centaury.catalogkue.R;
import com.centaury.catalogkue.data.db.entity.CakeEntity;
import com.centaury.catalogkue.ui.cart.adapter.CakeCartAdapter;
import com.centaury.catalogkue.ui.detail.DetailCakeActivity;
import com.centaury.catalogkue.utils.MyDividerItemDecoration;

import java.util.List;
import java.util.concurrent.ExecutionException;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.Unbinder;

public class CartFragment extends Fragment implements CakeCartAdapter.CakesAdapterListener {

    public static final String TAG = CartFragment.class.getSimpleName();

    @BindView(R.id.txt_toolbar)
    TextView mTxtToolbar;
    @BindView(R.id.toolbar)
    Toolbar mToolbar;
    @BindView(R.id.shadow)
    View mShadow;
    @BindView(R.id.recyc_keranjang)
    RecyclerView mRecycKeranjang;
    @BindView(R.id.ln_empty_state)
    LinearLayout mLnEmptyState;
    @BindView(R.id.harga_total)
    TextView mHargaTotal;
    @BindView(R.id.ln_jumlah)
    LinearLayout mLnJumlah;
    private View view;
    private Unbinder unbinder;

    private CartViewModel cartViewModel;
    private CakeCartAdapter cakeCartAdapter;

    public CartFragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_cart, container, false);
        unbinder = ButterKnife.bind(this, view);
        ((AppCompatActivity) getActivity()).setSupportActionBar(mToolbar);
        setHasOptionsMenu(true);

        return view;
    }

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

        cartViewModel = ViewModelProviders.of((FragmentActivity) getContext()).get(CartViewModel.class);

        cakeCartAdapter = new CakeCartAdapter(getContext(), this);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getContext());
        mRecycKeranjang.setLayoutManager(layoutManager);
        mRecycKeranjang.setItemAnimator(new DefaultItemAnimator());
        mRecycKeranjang.addItemDecoration(new MyDividerItemDecoration(getContext(), DividerItemDecoration.VERTICAL, 16));
        mRecycKeranjang.setAdapter(cakeCartAdapter);
    }

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

        cartViewModel.getCakes().observe(this, new Observer<List<CakeEntity>>() {
            @Override
            public void onChanged(@Nullable List<CakeEntity> cakeEntities) {
                cakeCartAdapter.submitList(cakeEntities);
                toggleEmptyCakes(cakeEntities.size());
            }
        });
    }

    private void toggleEmptyCakes(int size) {
        if (size > 0) {
            mLnEmptyState.setVisibility(View.GONE);
        } else {
            mLnEmptyState.setVisibility(View.VISIBLE);
        }
    }

    private void deleteAllCakes() {
        cartViewModel.deleteAllCakes();
    }

    public void insertCake(CakeEntity cake) {
        cartViewModel.insertCake(cake);
    }

    private void showDeleteDialog() {
        LayoutInflater layoutInflaterAndroid = LayoutInflater.from(getContext());
        View view = layoutInflaterAndroid.inflate(R.layout.alert_dialog, null);

        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
        builder.setView(view);

        TextView dialogTitle = view.findViewById(R.id.dialog_title);
        TextView dialogDesc = view.findViewById(R.id.dialog_desc);
        dialogTitle.setText(getString(R.string.title_hapus));
        dialogDesc.setText(getString(R.string.txt_hapus_dialog));

        builder.setCancelable(false)
                .setPositiveButton(getString(R.string.label_hapus), (dialog, which) -> {
                    deleteAllCakes();
                    dialog.dismiss();
                })
                .setNegativeButton(getString(R.string.label_cancel), (dialog, which) -> {
                    dialog.dismiss();
                });
        final AlertDialog alertDialog = builder.create();
        alertDialog.show();
    }

    private void showDeleteByIdDialog(int cakeId) {

        final CakeEntity cake;
        try {
            cake = cartViewModel.getCake(cakeId);

            LayoutInflater layoutInflaterAndroid = LayoutInflater.from(getContext());
            View view = layoutInflaterAndroid.inflate(R.layout.alert_dialog, null);

            AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
            builder.setView(view);

            TextView dialogTitle = view.findViewById(R.id.dialog_title);
            TextView dialogDesc = view.findViewById(R.id.dialog_desc);
            dialogTitle.setText(getString(R.string.title_hapus));
            dialogDesc.setText(getString(R.string.txt_hapus_dialog));

            builder.setCancelable(false)
                    .setPositiveButton(getString(R.string.label_hapus), (dialog, which) -> {
                        cartViewModel.deleteCake(cake);
                        dialog.dismiss();
                    })
                    .setNegativeButton(getString(R.string.label_cancel), (dialog, which) -> {
                        dialog.dismiss();
                    });
            final AlertDialog alertDialog = builder.create();
            alertDialog.show();
        } catch (ExecutionException e) {
            // TODO - handle error
            e.printStackTrace();
        } catch (InterruptedException e) {
            // TODO - handle error
            e.printStackTrace();
        }
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);

    }

    @Override
    public void onDetach() {
        super.onDetach();

    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.menu_more, menu);

        super.onCreateOptionsMenu(menu, inflater);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.clear:
                showDeleteDialog();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        unbinder.unbind();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        unbinder.unbind();
    }

    @Override
    public void onClick(String cakeId, int position) {
        Intent intent = new Intent(getContext(), DetailCakeActivity.class);
        intent.putExtra(DetailCakeActivity.KEY_CAKE_ID, cakeId);
        startActivity(intent);
        getActivity().overridePendingTransition(R.anim.slide_in_from_right, R.anim.slide_out_to_left);
    }

    @Override
    public void onDeleteClick(int cakeId, int position) {
        showDeleteByIdDialog(cakeId);
    }
}