要实现Android水平RecycleView的无尽滚动动画,可以使用以下步骤:
以下是一个代码示例:
public class MyAdapter extends RecyclerView.Adapter {
private List data;
public MyAdapter(List data) {
this.data = data;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
// 设置动画效果
Animation animation = AnimationUtils.loadAnimation(holder.itemView.getContext(), R.anim.item_animation);
holder.itemView.startAnimation(animation);
// 设置数据
holder.textView.setText(data.get(position));
}
@Override
public int getItemCount() {
return data.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
TextView textView;
public ViewHolder(@NonNull View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.textView);
}
}
}
public abstract class EndlessScrollListener extends RecyclerView.OnScrollListener {
private int visibleThreshold = 5; // 阈值,用于判断是否滚动到最后一项
private int currentPage = 0; // 当前页数
private int previousTotalItemCount = 0; // 上一次加载数据时的总项数
private boolean loading = true; // 是否正在加载数据
private RecyclerView.LayoutManager layoutManager;
public EndlessScrollListener(RecyclerView.LayoutManager layoutManager) {
this.layoutManager = layoutManager;
}
@Override
public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int totalItemCount = layoutManager.getItemCount();
int lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
// 判断是否需要加载更多数据
if (loading && totalItemCount > previousTotalItemCount) {
loading = false;
previousTotalItemCount = totalItemCount;
}
if (!loading && totalItemCount - visibleThreshold <= lastVisibleItemPosition) {
currentPage++;
onLoadMore(currentPage);
loading = true;
}
}
public abstract void onLoadMore(int currentPage);
}
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private MyAdapter adapter;
private List data = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recyclerView);
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
recyclerView.setLayoutManager(layoutManager);
adapter = new MyAdapter(data);
recyclerView.setAdapter(adapter);
// 设置滚动监听器
recyclerView.addOnScrollListener(new EndlessScrollListener(layoutManager) {
@Override
public void onLoadMore(int currentPage) {
// 加载更多数据
// 这里可以根据需要从网络或本地加载数据,并将数据添加到data列表中
// 然后调用adapter的notifyDataSetChanged()方法刷新视图
}
});