Java tutorial
/* * Copyright (C) 2012 Brian Muramatsu * * 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. */ package com.btmura.android.reddit.app; import android.database.Cursor; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.Loader; import android.view.ActionMode; 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.AbsListView.MultiChoiceModeListener; import android.widget.ListView; import com.btmura.android.reddit.R; import com.btmura.android.reddit.util.Views; import com.btmura.android.reddit.widget.ThingView.OnThingViewClickListener; public class CommentListFragment extends ListFragment implements LoaderCallbacks<Cursor>, MultiChoiceModeListener, OnThingViewClickListener, Refreshable, Filterable { public static final String TAG = "CommentListFragment"; private CommentListController controller; private CommentMenuController menuController; public static CommentListFragment newInstance(String accountName, String thingId, String linkId) { Bundle args = new Bundle(3); args.putString(CommentListController.EXTRA_ACCOUNT_NAME, accountName); args.putString(CommentListController.EXTRA_THING_ID, thingId); args.putString(CommentListController.EXTRA_LINK_ID, linkId); CommentListFragment frag = new CommentListFragment(); frag.setArguments(args); return frag; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); controller = new CommentListController(getActivity(), getArguments(), this); menuController = new CommentMenuController(getActivity(), this, this); if (savedInstanceState != null) { controller.restoreInstanceState(savedInstanceState); } setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = super.onCreateView(inflater, container, savedInstanceState); ListView lv = (ListView) v.findViewById(android.R.id.list); lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL); lv.setMultiChoiceModeListener(this); lv.setDivider(null); return v; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setListAdapter(controller.getAdapter()); setListShown(false); getLoaderManager().initLoader(0, null, this); } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { return controller.createLoader(); } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) { controller.swapCursor(cursor); setEmptyText(getString(cursor != null ? R.string.empty_list : R.string.error)); setListShown(true); } @Override public void onLoaderReset(Loader<Cursor> loader) { controller.swapCursor(null); } @Override public void onStatusClick(View view) { int position = getListView().getPositionForView(view); long id = getListView().getItemIdAtPosition(position); controller.expandOrCollapse(position, id); } @Override public void onVoteClick(View view, int action) { int position = getListView().getPositionForView(view); controller.vote(action, position); } @Override public void refresh() { controller.swapCursor(null); setListAdapter(controller.getAdapter()); setListShown(false); getLoaderManager().restartLoader(0, null, this); } @Override public int getFilter() { return controller.getFilter(); } @Override public void setFilter(int filter) { if (filter != controller.getFilter()) { controller.setFilter(filter); refresh(); } } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); menuController.onCreateOptionsMenu(menu, inflater); } @Override public void onPrepareOptionsMenu(Menu menu) { super.onPrepareOptionsMenu(menu); menuController.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { return menuController.onOptionsItemSelected(item) || super.onOptionsItemSelected(item); } // TODO(btmura): Move action mode code into separate ActionModeController impl. @Override public boolean onCreateActionMode(ActionMode mode, Menu menu) { if (controller.getAdapter().getCursor() == null) { getListView().clearChoices(); return false; } MenuInflater inflater = mode.getMenuInflater(); inflater.inflate(R.menu.comment_action_menu, menu); return true; } @Override public boolean onPrepareActionMode(ActionMode mode, Menu menu) { int count = getListView().getCheckedItemCount(); mode.setTitle(getResources().getQuantityString(R.plurals.comments, count, count)); int position = Views.getCheckedPosition(getListView()); controller.prepareActionMenu(menu, getListView(), position); return true; } @Override public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) { mode.invalidate(); } @Override public boolean onActionItemClicked(ActionMode mode, MenuItem item) { int position = Views.getCheckedPosition(getListView()); switch (item.getItemId()) { case R.id.menu_reply: controller.reply(position); mode.finish(); return true; case R.id.menu_edit: controller.edit(position); mode.finish(); return true; case R.id.menu_delete: controller.delete(getListView()); mode.finish(); return true; case R.id.menu_author: controller.author(position); mode.finish(); return true; case R.id.menu_share_comment: controller.share(position); mode.finish(); return true; case R.id.menu_copy_url: controller.copyUrl(position); mode.finish(); return true; default: return false; } } @Override public void onDestroyActionMode(ActionMode mode) { } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); controller.saveInstanceState(outState); } }