リストビューの一番上に静かに挿入するためのやつ

InsertQuietly.java

private ListView mListView;
private ArrayAdapter<twitter4j.Status> mAdapter;
private twitter4j.Status mFirstVisibleStatus;
private int mFirstVisibleOffset = -1;

protected void savePosition() {
    if (mAdapter.isEmpty()) return;
    mFirstVisibleStatus = mAdapter.getItem(mListView.getFirstVisiblePosition());
    mFirstVisibleOffset = mListView.getChildAt(0).getTop();
}

protected void restorePosition() {
    if (mFirstVisibleStatus != null) {
        int pos = mAdapter.getPosition(mFirstVisibleStatus);
        mListView.setSelectionFromTop(pos, mFirstVisibleOffset);
    }
}

protected void insertQuietly(twitter4j.Status status) {
    if (isResumed()) {
        savePosition();
    }
    mAdapter.insert(status, 0);
    restorePosition();
}

protected void flushQueue(List<twitter4j.Status> statuses) {
    if (statuses != null) {
        savePosition();
        for (ListIterator<twitter4j.Status> ite = statuses.listIterator(statuses.size()); ite.hasPrevious(); ) {
            twitter4j.Status status = ite.previous();
            if (mAdapter.getPosition(status) < 0) {
                mAdapter.insert(status, 0);
            }
        }
        restorePosition();
    }
}