如何在RecyclerView中使用一些ListView方法？

Question

I'm used RecyclerView for show and sort levels. because ListView has slowly speed I did not use listView and use RecyclerView.
Therefore, I need some of the ListView methods, this methods has SetScrollPosition and SetOnItemSelect .

My RecyclerView Adapter codes :

public class levels_card_adapter extends
    RecyclerView.Adapter<levels_card_adapter.ViewHolder> {
private static String[] adapter_levels_number;

public levels_card_adapter(String[] adapter_levels_num_data) {
    adapter_levels_number = adapter_levels_num_data;



}

@Override
public levels_card_adapter.ViewHolder onCreateViewHolder(ViewGroup parent,
                                                         int viewType) {

    View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
            R.layout.levels_recycler_layout, null);


    ViewHolder viewHolder = new ViewHolder(itemLayoutView);
    return viewHolder;
}

@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {

    viewHolder.adapter_levels_text.setText(adapter_levels_number[position].toString());

    viewHolder.adapter_levels_version = adapter_levels_number[position];



}

@Override
public int getItemCount() {
    return adapter_levels_number.length;
}

public static class ViewHolder extends RecyclerView.ViewHolder {

    public TextView adapter_levels_text;

    public String adapter_levels_version;


    public ViewHolder(View itemLayoutView) {
        super(itemLayoutView);

        adapter_levels_text = (TextView) itemLayoutView
                .findViewById(R.id.level_thumnail_text);

        itemLayoutView.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                Intent question_page_intent = new Intent(v.getContext(), com.tellfa.braingame.activities.question_Page.class);
                v.getContext().startActivity(question_page_intent);

            }
        });

    }

}

Activity Code :

public class play_Page extends ActionBarActivity {

private RecyclerView play_recycler_levels;
private RecyclerView.Adapter play_adapter_levels;
private TextView play_header_text;
private tellfa_textView play_thumbnail_levels_num, play_time_level_num;
private DiscreteSeekBar play_scroll_seekbar;
private com.github.jorgecastilloprz.FABProgressCircle fb;
private Context context;
private ListView play_list_levels;

public static String[] levels_number = {"1", "2", "3", "4", "5", "6", "7", "8", "9",
        "10", "11", "12", "13", "14", "15", "16"};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.play__page);

    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);

    ///////////// Font Style
    Typeface yekan_font = Typeface.createFromAsset(getAssets(), "fonts/yekan.ttf");

    play_header_text = (TextView) findViewById(R.id.header_play_text);
    play_header_text.setTypeface(yekan_font);
    /////////////

    play_thumbnail_levels_num = (tellfa_textView) findViewById(R.id.level_thumnail_text);

    play_time_level_num = (tellfa_textView) findViewById(R.id.time_levels_num);

    ///////////// SeekBar
    play_scroll_seekbar = (DiscreteSeekBar) findViewById(R.id.scroll_seekbar_play);



    ///////////// Recycler View
    play_recycler_levels = (RecyclerView) findViewById(R.id.levels_recycler);

    play_recycler_levels.setHasFixedSize(true);

    play_recycler_levels.setLayoutManager(new LinearLayoutManager(this));

    play_adapter_levels = new levels_card_adapter(levels_number);

    play_recycler_levels.setAdapter(play_adapter_levels);

    ////////////

    /*
    //////////// List
    com.tellfa.braingame.adapters.levels_list_adapter adapter=new com.tellfa.braingame.adapters.levels_list_adapter
            (this, levels_number);
    play_list_levels=(ListView)findViewById(R.id.list);
    play_list_levels.setAdapter(adapter);
    play_list_levels.setScrollingCacheEnabled(true);
        ///////////
    */

    FrameLayout containerLayout = (FrameLayout) findViewById(R.id.rel_id);
    HeaderAnimator animator = new HeaderAnimator(this);

    StikkyHeaderBuilder.stickTo(play_recycler_levels)
            .setHeader(R.id.header, containerLayout)
            .minHeightHeader(250)
            .animator(animator)
            .build();

    ///////////// Refresh
    final SwipeRefreshLayout play_refresh = (SwipeRefreshLayout) findViewById(R.id.refresh_play_layout);
    play_refresh.setColorSchemeResources(R.color.refresh1, R.color.refresh2, R.color.refresh3, R.color.refresh4, R.color.refresh5);
    play_refresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            play_refresh.setRefreshing(true);

        }
    });

}

How can I make this method?
this is very important for me

Answer 1

What about setScrollX() and RecyclerView.OnItemTouchListener ?

public void setScrollX (int value)

Set the horizontal scrolled position of your view.

RecyclerView.OnItemTouchListener

An OnItemTouchListener allows the application to intercept touch events in progress at the view hierarchy level of the RecyclerView before those touch events are considered for RecyclerView's own scrolling behavior.

Answer 2

I have implemented something like that and the only way of scrolling with the RecyclerView is calculating the position manually and scrolling with the LayoutManager that you are using.

I used these 2 methods in my adapter to achieve this, if you find out that it helps you out use it:

public void scrollToPosition(int positionToScrollTo) {
    LinearLayoutManager layoutManager = null;
    try {
        layoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
    } catch (ClassCastException e) {
        log.d("You should pass a recyclerview with a layoutmanayer" +
                "that inherits from LinearLayoutManager");
        return;
    }
    int firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition();
    View firstVisibleItemView = layoutManager.findViewByPosition(firstVisibleItemPosition);
    int firstViewHeight = firstVisibleItemView.getHeight();
    int scrollOffsetVertical = firstViewHeight * positionToScrollTo;
    mRecyclerView.scrollBy(0, scrollOffsetVertical);
}

public void smoothScrollToPosition(int positionToSCroll) {
    for (int i = 0;i < positionToSCroll; i++) {
        scrollToPosition(i);
    }

}

There should be better ways to do this but this worked for me, hope it helps, Good luck...