Android Open Source - Test-SimpleTwitterClient Connected User Timeline Fragment

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Java Source Code

package com.example.Twitter_Android.Fragments;
// w  ww.ja  v  a  2 s . c o m
import android.app.Activity;
import android.app.DialogFragment;
import android.app.LoaderManager;
import android.content.Loader;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import com.example.Twitter_Android.Fragments.Adapters.TimelineAdapter;
import com.example.Twitter_Android.Fragments.Adapters.TweetAdapter;
import com.example.Twitter_Android.Fragments.Dialogs.DeleteTweetDialog;
import com.example.Twitter_Android.Fragments.Dialogs.PostTweetDialog;
import com.example.Twitter_Android.Fragments.Dialogs.ReplyDialog;
import com.example.Twitter_Android.Loaders.UserTimelineLoader;
import com.example.Twitter_Android.Logic.Constants;
import com.example.Twitter_Android.Logic.DataCache;
import com.example.Twitter_Android.Logic.Tweet;
import com.example.Twitter_Android.R;

import java.util.List;

public class ConnectedUserTimelineFragment extends TimelineFragment<Tweet> {
  private TimelineAdapter<Tweet> currentAdapter;
  private static final DataCache cache;

  private static final int TIMELINE_LOADER_ID = Constants.CONNECTED_USER_TIMELINE_LOADER;
  private static final int OLD_TWEETS_LOADER = Constants.CONNECTED_USER_OLD_TWEETS_LOADER;
  public static final String TAG = "TAG_CONNECTED_USER_TIMELINE";
  private static final String ADAPTER_TAG = "CON_U_TL_F";
  private static final String MAX_ID = "MAX_ID";
  private static final ConnectedUserTimelineFragment instance;

  static {
    instance = new ConnectedUserTimelineFragment();
    instance.setRetainInstance(true);
    instance.setHasOptionsMenu(true);
    cache = DataCache.getInstance();
  }

  //------------------------------------------------------------------------------------------------------------------
  public static ConnectedUserTimelineFragment getInstance() {
    return instance;
  }
  //------------------------------------------------------------------------------------------------------------------

  @Override
  public void onAttach(Activity activity) {
    super.onAttach(activity);
  }

  //------------------------------------------------------------------------------------------------------------------
  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    if (currentAdapter == null) {
      /*
        ????? ?????????? ????????, ????? ?? ???????????? ? ????? ?????????, ???????? ?? ?????? ????????.
        ? ????? ??????, ????? ?? ??????? ????? ????? ? ?? ????????? ??????? (?????), ????? ??????????? ???????
        ? ?????????? ???.
       */
      currentAdapter = (TweetAdapter) cache.getAdapter(ADAPTER_TAG);
      if (currentAdapter == null) {
        LoaderManager loaderManager = getLoaderManager();
        if (loaderManager != null) {
          loaderManager.initLoader(TIMELINE_LOADER_ID, null, this);
        }
      } else {
        setListAdapter(currentAdapter);
        currentAdapter.updateContext(getActivity());
      }
    } else {
      /*
        ?.?. ?????? ???????? setRetainInstance(true), ?? ??? ????????? ????????????
        (??? ???????? ??????, ????????) ?????????? ???????? ?????? ?? MainActivity.
        ????? ????????? ?????? ???? "java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState",
        ????? ?????? ???????? ???????????? ? ??????????? (? ?? ? ???????) ????????.
       */
      currentAdapter.updateContext(getActivity());
    }
    needNewestTweet = false;
  }

  @Override
  protected void loadOldItems() {
    long maxID = getMaxId();
    Bundle args = new Bundle();
    args.putLong(MAX_ID, maxID);
    LoaderManager loaderManager = getLoaderManager();
    if (loaderManager != null) {
      loaderManager.restartLoader(OLD_TWEETS_LOADER, args, this);
    }
  }

  //------------------------------------------------------------------------------------------------------------------

  @Override
  public Loader<List<Tweet>> onCreateLoader(int id, Bundle args) {
    return new UserTimelineLoader(getActivity(), cache.getConnectedUserID(), 0, 0);
  }

  @Override
  public void onLoadFinished(Loader<List<Tweet>> loader, List<Tweet> data) {
    if ((data.size() > 0) && (loader != null)) {
      switch (loader.getId()) {
        case TIMELINE_LOADER_ID:
          if (currentAdapter == null) {
            currentAdapter = new TweetAdapter(getActivity(), data, ADAPTER_TAG);
            setListAdapter(currentAdapter);
          }
          break;
        case OLD_TWEETS_LOADER:
          if (currentAdapter != null) {
            currentAdapter.addItemsToBottom(data);
          }
          break;
      }
    }
    //????????? ???? ?????? - ?????? ?????? ??????? ?????? ?, ??????????????, ?? ?????.
    if (data.size() < TWEETS_BEFORE_END) {
      needOldTweet = false;
    }
    isLoading = false;
  }

  @Override
  public void onLoaderReset(Loader<List<Tweet>> loader) {
  }

  //------------------------------------------------------------------------------------------------------------------
  @Override
  public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
    Tweet tweetToReply = getItem(position);
    if (tweetToReply != null) {
      Activity activity = getActivity();
      if (activity != null) {
        DialogFragment dialogFragment = ReplyDialog.getInstance(tweetToReply);
        dialogFragment.show(getActivity().getFragmentManager().beginTransaction(), ReplyDialog.TAG);
        return true;
      }
    }
    return false;
  }

  //------------------------------------------------------------------------------------------------------------------

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

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
      case R.id.menu_item_post_tweet:
        postTweet();
        return true;
      case R.id.menu_item_remove_tweet:
        deleteTweet();
        return true;
    }
    return super.onOptionsItemSelected(item);
  }

  private void postTweet() {
    Activity activity = getActivity();
    if (activity != null) {
      DialogFragment dialog = PostTweetDialog.newInstance(currentAdapter);
      dialog.show(activity.getFragmentManager().beginTransaction(), PostTweetDialog.TAG);
    }
  }

  private void deleteTweet() {
    Activity activity = getActivity();
    if (activity != null) {
      DialogFragment dialog = DeleteTweetDialog.getInstance(currentAdapter, getSelectedItem());
      dialog.show(activity.getFragmentManager().beginTransaction(), DeleteTweetDialog.TAG);
    }
  }
}
Java Source Code List
