se.urvancevav.divider.ListViewFragment.java Source code

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Here is the source code for se.urvancevav.divider.ListViewFragment.java

Source

package se.urvancevav.divider;

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Currency;
import java.util.Locale;

import de.greenrobot.event.EventBus;

public class ListViewFragment extends ListFragment {

    private ListViewAdapter listViewAdapter;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_listview, container, false);
        ListView listView = (ListView) rootView.findViewById(android.R.id.list);

        SwipeDismissListViewTouchListener touchListener = new SwipeDismissListViewTouchListener(listView,
                new SwipeDismissListViewTouchListener.DismissCallbacks() {

                    @Override
                    public boolean canDismiss(int position) {
                        return true;
                    }

                    public void onDismiss(ListView listView, int[] reverseSortedPositions) {
                        boolean isChanged = false;
                        for (int position : reverseSortedPositions) {
                            if (listViewAdapter.getCount() > position) {
                                ListItem item = listViewAdapter.getItem(position);
                                listViewAdapter.remove(item);
                                isChanged = true;
                            }
                        }
                        if (isChanged) {
                            recalculateSums();
                        }
                    }
                });
        listView.setOnTouchListener(touchListener);
        listView.setOnScrollListener(touchListener.makeScrollListener());

        return rootView;
    }

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

        listViewAdapter = new ListViewAdapter(this.getActivity(), R.layout.list_view_row_layout);

        ListItem item = new ListItem();
        item.setName("First");
        listViewAdapter.add(item);

        item = new ListItem();
        item.setName("Second");
        listViewAdapter.add(item);

        setListAdapter(listViewAdapter);

    }

    @Override
    public void onStart() {
        super.onStart();
        EventBus.getDefault().register(this);
    }

    @Override
    public void onStop() {
        EventBus.getDefault().unregister(this);
        super.onStop();
    }

    @SuppressWarnings("unused")
    public void onEvent(AddNewItemEvent event) {
        ListItem item = new ListItem();
        item.setName("aa_bbb_" + listViewAdapter.getCount());
        item.setPaidAmount(new BigDecimal(100));
        listViewAdapter.add(item);

        recalculateSums();
        //Toast.makeText(getActivity(), item.getName(), Toast.LENGTH_SHORT).show();
    }

    private void recalculateSums() {
        BigDecimal total = new BigDecimal(0);
        // Recalculate total sum
        for (int idx = 0; idx < listViewAdapter.getCount(); idx++) {
            ListItem listItem = listViewAdapter.getItem(idx);
            total = total.add(listItem.getPaidAmount());
        }

        BigDecimal meanValue = BigDecimal.ZERO;
        if (!listViewAdapter.isEmpty()) {
            meanValue = total.divide(new BigDecimal(listViewAdapter.getCount()),
                    Currency.getInstance(Locale.getDefault()).getDefaultFractionDigits(), RoundingMode.HALF_EVEN);
        }

        for (int idx = 0; idx < listViewAdapter.getCount(); idx++) {
            ListItem listItem = listViewAdapter.getItem(idx);
            listItem.setReturnAmount(listItem.getPaidAmount().subtract(meanValue));
        }

        listViewAdapter.notifyDataSetChanged();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
    }
}