Java tutorial
/* * Copyright 2012 GitHub Inc. * * 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.janela.mobile.ui.repo; import static com.janela.mobile.Intents.EXTRA_USER; import static com.janela.mobile.RequestCodes.REPOSITORY_VIEW; import static com.janela.mobile.ResultCodes.RESOURCE_CHANGED; import static java.util.Locale.US; import android.app.Activity; import android.app.AlertDialog; import android.content.Intent; import android.os.Bundle; import android.support.v4.content.Loader; import android.view.View; import android.view.View.OnClickListener; import android.widget.ListView; import com.janela.kevinsawicki.wishlist.SingleTypeAdapter; import com.janela.kevinsawicki.wishlist.ViewFinder; import com.janela.mobile.R; import com.janela.mobile.ThrowableLoader; import com.janela.mobile.persistence.AccountDataManager; import com.janela.mobile.ui.HeaderFooterListAdapter; import com.janela.mobile.ui.ItemListFragment; import com.janela.mobile.ui.LightAlertDialog; import com.janela.mobile.ui.user.OrganizationSelectionListener; import com.janela.mobile.ui.user.OrganizationSelectionProvider; import com.janela.mobile.ui.user.UserViewActivity; import com.janela.mobile.util.AvatarLoader; import com.google.inject.Inject; import java.util.Collections; import java.util.List; import java.util.concurrent.atomic.AtomicReference; import org.eclipse.egit.github.core.Repository; import org.eclipse.egit.github.core.User; /** * Fragment to display a list of {@link Repository} instances */ public class RepositoryListFragment extends ItemListFragment<Repository> implements OrganizationSelectionListener { @Inject private AccountDataManager cache; @Inject private AvatarLoader avatars; private final AtomicReference<User> org = new AtomicReference<User>(); private RecentRepositories recentRepos; @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); User org = this.org.get(); if (org != null) outState.putSerializable(EXTRA_USER, org); } @Override protected void configureList(Activity activity, ListView listView) { super.configureList(activity, listView); listView.setDividerHeight(0); updateHeaders(items); } @Override public void onDetach() { OrganizationSelectionProvider selectionProvider = (OrganizationSelectionProvider) getActivity(); if (selectionProvider != null) selectionProvider.removeListener(this); super.onDetach(); } @Override public void onOrganizationSelected(final User organization) { User previousOrg = org.get(); int previousOrgId = previousOrg != null ? previousOrg.getId() : -1; org.set(organization); if (recentRepos != null) recentRepos.saveAsync(); // Only hard refresh if view already created and org is changing if (previousOrgId != organization.getId()) { Activity activity = getActivity(); if (activity != null) recentRepos = new RecentRepositories(activity, organization); refreshWithProgress(); } } @Override public void onActivityCreated(Bundle savedInstanceState) { Activity activity = getActivity(); User currentOrg = ((OrganizationSelectionProvider) activity).addListener(this); if (currentOrg == null && savedInstanceState != null) currentOrg = (User) savedInstanceState.getSerializable(EXTRA_USER); org.set(currentOrg); if (currentOrg != null) recentRepos = new RecentRepositories(activity, currentOrg); setEmptyText(R.string.no_repositories); super.onActivityCreated(savedInstanceState); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { // Refresh if the viewed repository was (un)starred if (requestCode == REPOSITORY_VIEW && resultCode == RESOURCE_CHANGED) { forceRefresh(); return; } super.onActivityResult(requestCode, resultCode, data); } @Override public void onListItemClick(ListView list, View v, int position, long id) { Repository repo = (Repository) list.getItemAtPosition(position); if (recentRepos != null) recentRepos.add(repo); startActivityForResult(RepositoryViewActivity.createIntent(repo), REPOSITORY_VIEW); } @Override public boolean onListItemLongClick(ListView list, View v, int position, long itemId) { if (!isUsable()) return false; final Repository repo = (Repository) list.getItemAtPosition(position); if (repo == null) return false; final AlertDialog dialog = LightAlertDialog.create(getActivity()); dialog.setCanceledOnTouchOutside(true); dialog.setTitle(repo.generateId()); View view = getActivity().getLayoutInflater().inflate(R.layout.repo_dialog, null); ViewFinder finder = new ViewFinder(view); final User owner = repo.getOwner(); avatars.bind(finder.imageView(R.id.iv_owner_avatar), owner); finder.setText(R.id.tv_owner_name, getString(R.string.navigate_to_user, owner.getLogin())); finder.onClick(R.id.ll_owner_area, new OnClickListener() { public void onClick(View v) { dialog.dismiss(); viewUser(owner); } }); if ((recentRepos != null) && (recentRepos.contains(repo))) { finder.find(R.id.divider).setVisibility(View.VISIBLE); finder.find(R.id.ll_recent_repo_area).setVisibility(View.VISIBLE); finder.onClick(R.id.ll_recent_repo_area, new OnClickListener() { public void onClick(View v) { dialog.dismiss(); recentRepos.remove(repo); refresh(); } }); } dialog.setView(view); dialog.show(); return true; } private void viewUser(User user) { if (org.get().getId() != user.getId()) startActivity(UserViewActivity.createIntent(user)); } @Override public void onStop() { super.onStop(); if (recentRepos != null) recentRepos.saveAsync(); } private void updateHeaders(final List<Repository> repos) { HeaderFooterListAdapter<?> rootAdapter = getListAdapter(); if (rootAdapter == null) return; DefaultRepositoryListAdapter adapter = (DefaultRepositoryListAdapter) rootAdapter.getWrappedAdapter(); adapter.clearHeaders(); if (repos.isEmpty()) return; // Add recent header if at least one recent repository Repository first = repos.get(0); if (recentRepos.contains(first)) adapter.registerHeader(first, getString(R.string.recently_viewed)); // Advance past all recent repositories int index; Repository current = null; for (index = 0; index < repos.size(); index++) { Repository repository = repos.get(index); if (recentRepos.contains(repository.getId())) current = repository; else break; } if (index >= repos.size()) return; if (current != null) adapter.registerNoSeparator(current); // Register header for first character current = repos.get(index); char start = Character.toLowerCase(current.getName().charAt(0)); adapter.registerHeader(current, Character.toString(start).toUpperCase(US)); char previousHeader = start; for (index = index + 1; index < repos.size(); index++) { current = repos.get(index); char repoStart = Character.toLowerCase(current.getName().charAt(0)); if (repoStart <= start) continue; // Don't include separator for the last element of the previous // character if (previousHeader != repoStart) adapter.registerNoSeparator(repos.get(index - 1)); adapter.registerHeader(current, Character.toString(repoStart).toUpperCase(US)); previousHeader = repoStart; start = repoStart++; } // Don't include separator for last element adapter.registerNoSeparator(repos.get(repos.size() - 1)); } @Override public Loader<List<Repository>> onCreateLoader(int id, final Bundle args) { return new ThrowableLoader<List<Repository>>(getActivity(), items) { @Override public List<Repository> loadData() throws Exception { User org = RepositoryListFragment.this.org.get(); if (org == null) return Collections.emptyList(); List<Repository> repos = cache.getRepos(org, isForceRefresh(args)); Collections.sort(repos, recentRepos); updateHeaders(repos); return repos; } }; } @Override protected SingleTypeAdapter<Repository> createAdapter(List<Repository> items) { return new DefaultRepositoryListAdapter(getActivity().getLayoutInflater(), items.toArray(new Repository[items.size()]), org); } @Override protected int getErrorMessage(Exception exception) { return R.string.error_repos_load; } }