Android Open Source - SelfossAndroidClient Feed Entry Content Fragment

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License

The source code is released under:
GNU General Public License
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Java Source Code

package org.vester.selfoss;
// w w  w.  j ava2s  .c o m
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.apache.commons.lang3.StringEscapeUtils;
import org.vester.selfoss.listener.MarkAsUnreadOperationListener;
import org.vester.selfoss.listener.StarOperationListener;
import org.vester.selfoss.model.FeedEntry;
import org.vester.selfoss.operation.Operation;
import org.vester.selfoss.operation.SelfossOperationFactory;

import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.text.Html;
import android.util.Log;
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.webkit.WebView;

/**
 * A fragment representing a single Item detail screen. This fragment is either contained in a {@link FeedEntryMainActivity} in two-pane mode (on
 * tablets) or a {@link FeedEntryContentActivity} on handsets.
 */
public class FeedEntryContentFragment extends Fragment implements MarkAsUnreadOperationListener, StarOperationListener {
  /**
   * The fragment argument representing the item ID that this fragment represents.
   */
  public static final String ARG_ITEM_ID = "item_id";

  /**
   * The FeedEntry content this fragment is presenting.
   */
  private FeedEntry mItem;

  private ExecutorService markAsUnreadThreads;

  private Handler guiThread;

  /**
   * Mandatory empty constructor for the fragment manager to instantiate the fragment (e.g. upon screen orientation changes).
   */
  public FeedEntryContentFragment() {
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments().containsKey(ARG_ITEM_ID)) {
      // Load the dummy content specified by the fragment
      // arguments. In a real-world scenario, use a Loader
      // to load content from a content provider.
      String id = getArguments().getString(ARG_ITEM_ID);
      if (org.vester.selfoss.FeedEntryRowFragment.items != null) {
        for (FeedEntry feedEntry : org.vester.selfoss.FeedEntryRowFragment.items) {
          if (feedEntry.id.equals(id)) {
            mItem = feedEntry;
            break;
          }
        }
      }
      markAsUnreadThreads = Executors.newSingleThreadExecutor();
      guiThread = new Handler();
    }

    setHasOptionsMenu(true);

  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.feed_entry_content, container, false);

    // Show the content in a WebView.
    if (mItem != null) {
      String title = StringEscapeUtils.escapeHtml4(StringEscapeUtils.unescapeHtml4(mItem.title));
      String sourceTitle = StringEscapeUtils.escapeHtml4(StringEscapeUtils.unescapeHtml4(mItem.sourcetitle));
      String content;
      if (needsEscaping(mItem.content)) {
        content = StringEscapeUtils.escapeHtml4(mItem.content);
      } else {
        content = mItem.content;
      }
      ((WebView) rootView.findViewById(R.id.item_detail)).loadData("<html><head><title>" + title
          + "</title></head><body><a style=\"font-size: 120%;text-decoration: none;\" href=\"" + parseLink(mItem.link) + "\" >" + title
          + "</a><br/><hr><span style=\"font-weight:bold\">" + sourceTitle + "</span><br/>" + content + "</body></html>", "text/html",
          "UTF-8");
    } else {
      // Switch to list activity
      getActivity().finish();
    }

    return rootView;
  }

  private boolean needsEscaping(String content) {
    String fromHtml = Html.fromHtml(content).toString();
    return fromHtml.equals(content);
  }

  private String parseLink(String link) {
    return link.replace("http://xkcd.com/", "http://m.xkcd.com/");
  }

  @Override
  public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    super.onCreateOptionsMenu(menu, inflater);
    inflater.inflate(R.menu.detail_options, menu);
    updateStarIcon(menu);

  }

  @Override
  public void onPrepareOptionsMenu(Menu menu) {
    super.onPrepareOptionsMenu(menu);
    updateStarIcon(menu);
  }

  private void updateStarIcon(Menu menu) {
    if (mItem != null) {
      menu.findItem(R.id.star).setVisible(mItem.isStared());
      menu.findItem(R.id.unstar).setVisible(!mItem.isStared());
    }
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.keep_unread:
      SelfossTask task = new SelfossTask(SelfossOperationFactory.getInstance().createMarkAsUnreadOperation(mItem.id, this), getActivity(),
          new ErrorCallback() {

            @Override
            public void errorOccured(String url, Operation operation, Exception e) {

            }
          });
      markAsUnreadThreads.submit(task);
      break;
    case R.id.star:
      task = new SelfossTask(SelfossOperationFactory.getInstance().createUnstarOperation(mItem.id, this), getActivity(), new ErrorCallback() {

        @Override
        public void errorOccured(String url, Operation operation, Exception e) {

        }
      });
      markAsUnreadThreads.submit(task);
      break;
    case R.id.unstar:
      task = new SelfossTask(SelfossOperationFactory.getInstance().createStarOperation(mItem.id, this), getActivity(), new ErrorCallback() {

        @Override
        public void errorOccured(String url, Operation operation, Exception e) {

        }
      });
      markAsUnreadThreads.submit(task);
      break;
    default:
      break;
    }
    return super.onOptionsItemSelected(item);
  }

  @Override
  public void markedAsUnread(final String id) {
    for (FeedEntry feedEntry : org.vester.selfoss.FeedEntryRowFragment.items) {
      if (feedEntry.id.equals(id)) {
        feedEntry.unread = true;
      }
    }
    FeedEntryRowFragment itemListFragment = (FeedEntryRowFragment) getFragmentManager().findFragmentById(R.id.item_list);
    itemListFragment.getAdapter().notifyDataSetChanged();

  }

  @Override
  public void starred(final String id) {
    Log.i(FeedEntryContentFragment.class.getName(), "Starred the feed entry: " + id);
    if (mItem.id.equals(id)) {
      mItem.setStarred(true);
      guiThread.post(new Runnable() {

        @Override
        public void run() {
          getActivity().invalidateOptionsMenu();
        }
      });
    }
  }

  @Override
  public void unstarred(String id) {

    Log.i(FeedEntryContentFragment.class.getName(), "Unstarred the feed entry: " + id);
    if (mItem.id.equals(id)) {
      mItem.setStarred(false);
      guiThread.post(new Runnable() {

        @Override
        public void run() {
          getActivity().invalidateOptionsMenu();
        }
      });
    }
  }
}
Java Source Code List
