Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2012-2014 lacolaco.net * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package net.lacolaco.smileessence.activity; import android.app.ActionBar; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.NavUtils; import android.text.TextUtils; import android.util.SparseBooleanArray; import android.view.*; import android.widget.AbsListView; import android.widget.AdapterView; import android.widget.ListView; import net.lacolaco.smileessence.Application; import net.lacolaco.smileessence.R; import net.lacolaco.smileessence.entity.ExtractionWord; import net.lacolaco.smileessence.logging.Logger; import net.lacolaco.smileessence.util.Themes; import net.lacolaco.smileessence.view.adapter.CustomListAdapter; import net.lacolaco.smileessence.view.dialog.DialogHelper; import net.lacolaco.smileessence.view.dialog.EditTextDialogFragment; import java.util.List; public class EditExtractionActivity extends Activity implements AdapterView.OnItemClickListener, AbsListView.MultiChoiceModeListener { // ------------------------------ FIELDS ------------------------------ private CustomListAdapter<ExtractionWord> adapter; // --------------------- GETTER / SETTER METHODS --------------------- private ExtractionWord[] getExtractionWords() { List<ExtractionWord> all = ExtractionWord.getAll(); return all.toArray(new ExtractionWord[all.size()]); } private ListView getListView() { return (ListView) findViewById(R.id.listview_edit_list); } // ------------------------ INTERFACE METHODS ------------------------ // --------------------- Interface Callback --------------------- @Override public boolean onCreateActionMode(ActionMode mode, Menu menu) { menu.clear(); MenuInflater inflater = mode.getMenuInflater(); inflater.inflate(R.menu.edit_list, menu); return true; } @Override public boolean onPrepareActionMode(ActionMode mode, Menu menu) { return false; } @Override public boolean onActionItemClicked(ActionMode mode, MenuItem item) { switch (item.getItemId()) { case R.id.menu_edit_list_delete: { deleteSelectedItems(); } } mode.finish(); return true; } @Override public void onDestroyActionMode(ActionMode mode) { } // --------------------- Interface MultiChoiceModeListener --------------------- @Override public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) { } // --------------------- Interface OnItemClickListener --------------------- @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { openEditExtractionWordDialog(position); } // ------------------------ OVERRIDE METHODS ------------------------ @Override protected void onCreate(Bundle savedInstanceState) { setTheme(Themes.getTheme(((Application) getApplication()).getThemeIndex())); super.onCreate(savedInstanceState); setContentView(R.layout.layout_edit_list); ActionBar actionBar = getActionBar(); actionBar.setDisplayHomeAsUpEnabled(true); initializeViews(); Logger.debug("EditExtractionWordActivity:onCreate"); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuItem add = menu.add(Menu.NONE, R.id.menu_edit_list_add, Menu.NONE, ""); add.setIcon(android.R.drawable.ic_menu_add); add.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_edit_list_add: { addNewExtractionWord(); break; } case android.R.id.home: { NavUtils.navigateUpFromSameTask(this); return true; } } return true; } // -------------------------- OTHER METHODS -------------------------- public void deleteSelectedItems() { SparseBooleanArray checkedItems = getListView().getCheckedItemPositions(); adapter.setNotifiable(false); for (int i = adapter.getCount() - 1; i > -1; i--) { if (checkedItems.get(i)) { ExtractionWord extractionWord = adapter.removeItem(i); extractionWord.delete(); } } adapter.setNotifiable(true); adapter.notifyDataSetChanged(); updateListView(); } public void openEditExtractionWordDialog(int position) { final ExtractionWord extractionWord = (ExtractionWord) adapter.getItem(position); EditTextDialogFragment dialogFragment = new EditTextDialogFragment() { @Override public void onTextInput(String text) { if (TextUtils.isEmpty(text.trim())) { return; } extractionWord.text = text; extractionWord.save(); adapter.notifyDataSetChanged(); updateListView(); } }; dialogFragment.setParams(getString(R.string.dialog_title_edit), extractionWord.text); DialogHelper.showDialog(this, dialogFragment); } private void addNewExtractionWord() { final ExtractionWord extractionWord = new ExtractionWord(); EditTextDialogFragment dialogFragment = new EditTextDialogFragment() { @Override public void onTextInput(String text) { if (TextUtils.isEmpty(text.trim())) { return; } extractionWord.text = text; extractionWord.save(); adapter.addToBottom(extractionWord); adapter.notifyDataSetChanged(); updateListView(); } }; dialogFragment.setParams(getString(R.string.dialog_title_add), ""); DialogHelper.showDialog(this, dialogFragment); } private void initializeViews() { ListView listView = getListView(); adapter = new CustomListAdapter<>(this, ExtractionWord.class); listView.setAdapter(adapter); adapter.addToTop(getExtractionWords()); adapter.update(); listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL); listView.setOnItemClickListener(this); listView.setMultiChoiceModeListener(this); } private void updateListView() { getListView().requestLayout(); } }