Java tutorial
/* * Copyright 2011 Azwan Adli Abdullah * * 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.gh4a.activities; import java.io.IOException; import java.util.Map; import org.eclipse.egit.github.core.Gist; import org.eclipse.egit.github.core.GistFile; import org.eclipse.egit.github.core.service.GistService; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; import android.support.v4.view.MenuItemCompat; import android.support.v7.app.ActionBar; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import com.gh4a.BackgroundTask; import com.gh4a.BaseActivity; import com.gh4a.Constants; import com.gh4a.Gh4Application; import com.gh4a.R; import com.gh4a.loader.GistLoader; import com.gh4a.loader.GistStarLoader; import com.gh4a.loader.LoaderCallbacks; import com.gh4a.loader.LoaderResult; import com.gh4a.utils.ApiHelpers; import com.gh4a.utils.StringUtils; import com.gh4a.utils.UiUtils; public class GistActivity extends BaseActivity implements View.OnClickListener { private String mGistId; private Gist mGist; private Boolean mIsStarred; private LoaderCallbacks<Gist> mGistCallback = new LoaderCallbacks<Gist>(this) { @Override protected Loader<LoaderResult<Gist>> onCreateLoader() { return new GistLoader(GistActivity.this, mGistId); } @Override protected void onResultReady(Gist result) { fillData(result); setContentShown(true); supportInvalidateOptionsMenu(); } }; private LoaderCallbacks<Boolean> mStarCallback = new LoaderCallbacks<Boolean>(this) { @Override protected Loader<LoaderResult<Boolean>> onCreateLoader() { return new GistStarLoader(GistActivity.this, mGistId); } @Override protected void onResultReady(Boolean result) { mIsStarred = result; supportInvalidateOptionsMenu(); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.gist); setContentShown(false); ActionBar actionBar = getSupportActionBar(); actionBar.setTitle(getString(R.string.gist_title, mGistId)); actionBar.setDisplayHomeAsUpEnabled(true); getSupportLoaderManager().initLoader(0, null, mGistCallback); getSupportLoaderManager().initLoader(1, null, mStarCallback); } @Override protected void onInitExtras(Bundle extras) { super.onInitExtras(extras); mGistId = extras.getString(Constants.Gist.ID); } @Override public void onRefresh() { LoaderManager lm = getSupportLoaderManager(); lm.getLoader(0).onContentChanged(); lm.getLoader(1).onContentChanged(); mGist = null; mIsStarred = null; setContentShown(false); super.onRefresh(); } private void fillData(final Gist gist) { mGist = gist; if (gist.getOwner() != null) { getSupportActionBar().setSubtitle(gist.getOwner().getLogin()); } TextView tvDesc = (TextView) findViewById(R.id.tv_desc); tvDesc.setText(TextUtils.isEmpty(gist.getDescription()) ? getString(R.string.gist_no_description) : gist.getDescription()); TextView tvCreatedAt = (TextView) findViewById(R.id.tv_created_at); tvCreatedAt.setText(StringUtils.formatRelativeTime(this, gist.getCreatedAt(), true)); Map<String, GistFile> files = gist.getFiles(); if (files != null && !files.isEmpty()) { ViewGroup container = (ViewGroup) findViewById(R.id.file_container); LayoutInflater inflater = getLayoutInflater(); container.removeAllViews(); for (GistFile gistFile : files.values()) { TextView rowView = (TextView) inflater.inflate(R.layout.selectable_label, container, false); rowView.setText(gistFile.getFilename()); rowView.setTextColor(UiUtils.resolveColor(this, android.R.attr.textColorPrimary)); rowView.setOnClickListener(this); rowView.setTag(gistFile); container.addView(rowView); } } else { findViewById(R.id.file_card).setVisibility(View.GONE); } findViewById(R.id.tv_private).setVisibility(gist.isPublic() ? View.GONE : View.VISIBLE); } @Override public void onClick(View view) { Intent intent = new Intent(this, GistViewerActivity.class); GistFile gist = (GistFile) view.getTag(); intent.putExtra(Constants.Gist.FILENAME, gist.getFilename()); intent.putExtra(Constants.Gist.ID, mGistId); startActivity(intent); } public boolean onCreateOptionsMenu(Menu menu) { MenuItem starItem = menu.add(0, R.id.star, 0, R.string.repo_star_action).setIcon(R.drawable.star); MenuItemCompat.setShowAsAction(starItem, MenuItemCompat.SHOW_AS_ACTION_ALWAYS); if (mGist != null) { MenuItem shareItem = menu.add(0, R.id.share, 0, R.string.share).setIcon(R.drawable.social_share); MenuItemCompat.setShowAsAction(shareItem, MenuItemCompat.SHOW_AS_ACTION_ALWAYS); } return super.onCreateOptionsMenu(menu); } @Override public boolean onPrepareOptionsMenu(Menu menu) { boolean authorized = Gh4Application.get().isAuthorized(); MenuItem starAction = menu.findItem(R.id.star); starAction.setVisible(authorized); if (authorized) { if (mIsStarred == null) { MenuItemCompat.setActionView(starAction, R.layout.ab_loading); MenuItemCompat.expandActionView(starAction); } else if (mIsStarred) { starAction.setTitle(R.string.repo_unstar_action); starAction.setIcon(R.drawable.unstar); } else { starAction.setTitle(R.string.repo_star_action); starAction.setIcon(R.drawable.star); } } return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.share: String login = ApiHelpers.getUserLogin(this, mGist.getOwner()); Intent shareIntent = new Intent(Intent.ACTION_SEND); shareIntent.setType("text/plain"); shareIntent.putExtra(Intent.EXTRA_SUBJECT, getString(R.string.share_gist_subject, mGistId, login)); shareIntent.putExtra(Intent.EXTRA_TEXT, mGist.getHtmlUrl()); shareIntent = Intent.createChooser(shareIntent, getString(R.string.share_title)); startActivity(shareIntent); return true; case R.id.star: MenuItemCompat.setActionView(item, R.layout.ab_loading); MenuItemCompat.expandActionView(item); new UpdateStarTask().schedule(); return true; } return super.onOptionsItemSelected(item); } @Override protected Intent navigateUp() { String login = mGist != null && mGist.getOwner() != null ? mGist.getOwner().getLogin() : null; if (login != null) { Intent intent = new Intent(this, GistListActivity.class); intent.putExtra(Constants.User.LOGIN, login); return intent; } return null; } private class UpdateStarTask extends BackgroundTask<Void> { public UpdateStarTask() { super(GistActivity.this); } @Override protected Void run() throws IOException { GistService gistService = (GistService) Gh4Application.get().getService(Gh4Application.GIST_SERVICE); if (mIsStarred) { gistService.unstarGist(mGistId); } else { gistService.starGist(mGistId); } return null; } @Override protected void onSuccess(Void result) { mIsStarred = !mIsStarred; supportInvalidateOptionsMenu(); } } }