次の内容に修正してください。
public class TweetTimeLinelTask extends AsyncTask<String, Void, QueryResult> { private static final String TAG = "TweetTimeLinelTask"; private Timer mUpdateListViewTimer; private ProgressBar mProgressBar; private static long mSinceId = -1; private static MainActivity mActivity; private LinkedList<Tweet> mCacheTweets = new LinkedList<Tweet>(); private ListView mListView; private LinkedList<Tweet> mTweets; private TweetAdapter mAdapter; private Handler mTimeLineHandler = new Handler(); // tweetリストビューへの更新処理 private Runnable mTimeLineRunnable = new Runnable() { @Override public void run() { if (mCacheTweets.size() > 0) { // スクロール中は、リストの更新を行わない if (scrollInMiddle()) { return; } Tweet tweet = mCacheTweets.removeLast(); mTweets.add(0, tweet); if (mTweets.size() > Constant.SIZE_PER_PAGE) { mTweets.removeLast(); } mAdapter.notifyDataSetChanged(); } else { // tweetが0件だった場合は、リスト更新タイマーをキャンセルする mUpdateListViewTimer.cancel(); mActivity.setmHasUpdateListViewTimer(false); } } private boolean scrollInMiddle() { int firstVisiblePosition = mListView.getFirstVisiblePosition(); int lastVisiblePosition = mListView.getLastVisiblePosition(); int count = mAdapter.getCount(); return count > 0 && firstVisiblePosition != 0 && (lastVisiblePosition != count - 1 || count != Constant.SIZE_PER_PAGE); } }; public TweetTimeLinelTask() { } public TweetTimeLinelTask(MainActivity activity) { mActivity = activity; mProgressBar = activity.getmProgressBar(); mListView = activity.getmListView(); mAdapter = activity.getmAdapter(); mTweets = activity.getmTweets(); mUpdateListViewTimer = activity.getmUpdateListViewTimer(); } @Override protected void onPreExecute() { // プログレスバーを表示させる mProgressBar.setVisibility(View.VISIBLE); } @Override protected QueryResult doInBackground(String... params) { QueryResult result; try { // tweeter4jを利用し、特定のハッシュタグがついたtweetを取得する Query query = new Query(params[0]); query.setPage(1); if (mSinceId != -1 && mSinceId != 0) { query.setSinceId(mSinceId); } query.setRpp(Constant.SIZE_PER_PAGE); result = new TwitterManager().search(query); } catch (TwitterException e) { Log.d(TAG, "error", e); result = null; } return result; } @Override protected void onPostExecute(QueryResult result) { // プログレスバーを非表示にする mProgressBar.setVisibility(View.GONE); if (result == null) { if (mActivity.isFinishing() && mActivity.isCurrent()) { mActivity.showDialog(Constant.ALERT_DIALOG_NET_WARNING); } } else { List<Tweet> newTweets = result.getTweets(); mSinceId = result.getMaxId(); mCacheTweets.addAll(0, newTweets); if (!mActivity.ismHasUpdateListViewTimer()) { // tweetリスト更新タスクをセットする mUpdateListViewTimer = new Timer(); TimerTask task = new TimerTask() { @Override public void run() { mTimeLineHandler.post(mTimeLineRunnable); } }; mUpdateListViewTimer.schedule(task, 0, Constant.SHOW_TIMELINE_IN_LISTVIEW); mActivity.setmHasUpdateListViewTimer(true); } } mActivity.setIsFirstLoading(false); } }
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