アンドロイドでタイムラインを作ってください

Question

今年の年月日を使ってタイムラインを作りたいと思います。 RecyclerViewは、リサイクルビューの機能に役立ちます。私は無限のリストを持つプロジェクトを見てきましたが、それらのすべてには始まりがあります。 RecycleViewやその他のコンポーネントを使用して、開始点や終了点を持たないリストを作成することは可能ですか？

Answer 1

あなたはonScrollListenerを添付して、タイムラインビューを表示するにはdy

private boolean loading = true; 
int pastVisiblesItems, visibleItemCount, totalItemCount; 

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() 
{ 
    @Override 
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) 
    { 
     if(dy > 0) //check for scroll down and do the same for scroll up 
     { 
      visibleItemCount = mLayoutManager.getChildCount(); 
      totalItemCount = mLayoutManager.getItemCount(); 
      pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition(); 

      if (loading) 
      { 
       if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) 
       { 
        loading = false; 
        Log.v("...", "Last Item Wow !"); 
        //Do pagination.. i.e. fetch new data 
       } 
      } 
     } 
    } 
}); 

Answer 2

recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { 
    @Override 
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 
     super.onScrolled(recyclerView, dx, dy); 
     totalItemCount = linearLayoutManager.getItemCount(); 
     lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition(); 
     if (!loading && totalItemCount <= (lastVisibleItem + visibleThreshold)) { 
      if (onLoadMoreListener != null) { 
       onLoadMoreListener.onLoadMore(); 
      } 
      loading = true; 
      if (onLoadMoreListenerLeft != null) { 
       onLoadMoreListenerLeft.onLoadMoreLeft(); 
      } 
      loading = true; 
    } 
     }); 

Answer 3

の値に基づいて、より多くのアイテムを取得し、表示することができ、私は図書館、以下の用途を持っています。最初にこのライブラリをプロジェクトに追加してください。私はhttps://github.com/vipulasri/Timeline-View

compile 'com.github.vipulasri:timelineview:1.0.5' 

MainActivity.java

public class MainActivity extends AppCompatActivity { 

RecyclerView recyclerView; 
String[] name = {"Event 1", "Event 2", "Event 3"}; 
String[] status = {"active", "inactive", "inactive"}; 
String[] description = {"Description 1","Description 2","Description 3"}; 
String[] time = {"11:00 PM", "10:03 AM", "10:03 PM"}; 

List<TimeLineModel> timeLineModelList; 
TimeLineModel[] timeLineModel; 
Context context; 
LinearLayoutManager linearLayoutManager; 

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

    timeLineModelList = new ArrayList<>(); 
    int size = name.length; 
    timeLineModel = new TimeLineModel[size]; 
    context = MainActivity.this; 
    linearLayoutManager = new LinearLayoutManager(this); 

    for (int i = 0; i < size; i++) { 
     timeLineModel[i] = new TimeLineModel(); 
     timeLineModel[i].setName(name[i]); 
     timeLineModel[i].setStatus(status[i]); 
     timeLineModel[i].setDescription(description[i]); 
     timeLineModel[i].setTime(time[i]); 
     timeLineModelList.add(timeLineModel[i]); 
    } 

    recyclerView = (RecyclerView) findViewById(R.id.activity_main_recycler_view); 
    recyclerView.setLayoutManager(linearLayoutManager); 
    DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(), linearLayoutManager.getOrientation()); 
    recyclerView.addItemDecoration(dividerItemDecoration); //for divider 

    recyclerView.setAdapter(new TimeLineAdapter(context, timeLineModelList)); 
}} 

TimeLineModel.java

class TimeLineModel { 
private String name; 
private String status; 
private String description; 

String getTime() { 
    return time; 
} 

void setTime(String time) { 
    this.time = time; 
} 

private String time; 

String getDescription() { 
    return description; 
} 

void setDescription(String description) { 
    this.description = description; 
} 

String getName() { 
    return name; 
} 

void setName(String name) { 
    this.name = name; 
} 

String getStatus() { 
    return status; 
} 

void setStatus(String status) { 
    this.status = status; 
}} 

TimeLineAdapter.java

を参照しています

class TimeLineAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 

private List<TimeLineModel> timeLineModelList; 
private Context context; 

TimeLineAdapter(Context context, List<TimeLineModel> timeLineModelList) { 
    this.timeLineModelList = timeLineModelList; 
    this.context = context; 
} 

@Override 
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_timeline_layout, parent, false); 
    return new ViewHolder(view, viewType); 
} 

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) 
@Override 
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 
    ((ViewHolder) holder).textView.setText(timeLineModelList.get(position).getName()); 
    ((ViewHolder) holder).textViewDescription.setText(timeLineModelList.get(position).getDescription()); 
    ((ViewHolder)holder).textViewTime.setText(timeLineModelList.get(position).getTime()); 

    if (timeLineModelList.get(position).getStatus().equals("inactive")) 
     ((ViewHolder) holder).timelineView.setMarker(context.getDrawable(ic_remove_circle_outline_black_24dp)); 
    else 
     ((ViewHolder) holder).timelineView.setMarker(context.getDrawable(ic_check_circle_black_24dp)); 
} 

@Override 
public int getItemViewType(int position) { 
    return TimelineView.getTimeLineViewType(position, getItemCount()); 
} 

@Override 
public int getItemCount() { 
    return timeLineModelList.size(); 
} 

private class ViewHolder extends RecyclerView.ViewHolder { 

    TimelineView timelineView; 
    TextView textView, textViewDescription, textViewTime; 

    ViewHolder(View itemView, int viewType) { 
     super(itemView); 
     timelineView = itemView.findViewById(R.id.row_timeline_layout_time_marker); 
     textView = itemView.findViewById(R.id.row_timeline_layout_text_view_name); 
     textViewDescription = itemView.findViewById(R.id.row_timeline_layout_text_view_description); 
     textViewTime = itemView.findViewById(R.id.row_timeline_layout_text_view_time); 

     timelineView.initLine(viewType); 
    } 
}} 

私のコードでは、データを含むモデルクラスを作成し、リストサイズのタイムラインに応じて、その参照のデータはrecyclerviewでバインドされます。TimeLineAdapter.java。 row_timeline_layoutは行xmlファイルです。このレイアウトはrecyclerviewでバインドされています。

静的データのタイムラインを作成し、それをrecyclerviewにバインドすることもできます。