Android實(shí)現(xiàn)獲獎(jiǎng)名單滾動(dòng)效果
最近公司項(xiàng)目需要一個(gè)展示獲獎(jiǎng)名單的效果，做完之后在此分享出來(lái)。
效果展示
思路分析
獲獎(jiǎng)名單是一個(gè)無(wú)限滾動(dòng)的效果，因此我們可以想到通過(guò)使用RecyclerView來(lái)加載無(wú)限的條目，然后通過(guò)不斷的自動(dòng)向下滑動(dòng)RecyclerView來(lái)實(shí)現(xiàn)這個(gè)效果，但是獲獎(jiǎng)名單不能手動(dòng)滑動(dòng)因此我們需要將其滑動(dòng)功能屏蔽掉。
實(shí)現(xiàn)禁止滑動(dòng)的RecyclerView
public class MyRecyclerView extends RecyclerView {public MyRecyclerView(Context context) {this(context,null);}public MyRecyclerView(Context context, @Nullable AttributeSet attrs) {this(context, attrs,0);}public MyRecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}//禁止手動(dòng)滑動(dòng)@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {return true;}}
Adapter編寫(xiě)（實(shí)現(xiàn)加載無(wú)限重復(fù)數(shù)據(jù)的關(guān)鍵）
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>{//這里的WinnListBean是我模擬的中獎(jiǎng)數(shù)據(jù)private List<WinnListBean> mDatas;private Context mContext;public MyAdapter(List<WinnListBean> mDatas, Context mContext) {this.mDatas = mDatas;this.mContext = mContext;}@NonNull@Overridepublic MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {View view = LayoutInflater.from(mContext).inflate(R.layout.item_winnlist,null,false);return new MyViewHolder(view);}@Overridepublic void onBindViewHolder(@NonNull MyViewHolder myViewHolder, int i) {WinnListBean winnListBean = mDatas.get(i % mDatas.size());//獲取重復(fù)數(shù)據(jù)myViewHolder.itemWinnlistTvPhone.setText(winnListBean.getPhone());myViewHolder.itemWinnlistTvPrize.setText(winnListBean.getPrize());}@Overridepublic int getItemCount() {// 本案例一頁(yè)最多顯示6條數(shù)據(jù)，因此設(shè)置如果數(shù)據(jù)數(shù)量大于6等于6才開(kāi)始滾動(dòng)if(mDatas.size()>5){// 展示無(wú)限數(shù)據(jù)return Integer.MAX_VALUE;}else {return mDatas.size();}}static class MyViewHolder extends RecyclerView.ViewHolder{private TextView itemWinnlistTvPhone;private TextView itemWinnlistTvPrize;public MyViewHolder(@NonNull View itemView) {super(itemView);itemWinnlistTvPhone = (TextView) itemView.findViewById(R.id.item_winnlist_tv_phone);itemWinnlistTvPrize = (TextView) itemView.findViewById(R.id.item_winnlist_tv_prize);}}}
實(shí)現(xiàn)自動(dòng)滾動(dòng)
這里的自動(dòng)滾動(dòng)是使用的RecyclerView的smoothScrollBy()方法結(jié)合Handler來(lái)實(shí)現(xiàn)的。
mHandler=new Handler();mRunnable = new Runnable() {@Overridepublic void run() {//RecyclerView每隔200毫秒向下滾動(dòng)一次mRecyclerView.smoothScrollBy(0,5);mHandler.postDelayed(this,200);}};mHandler.post(mRunnable);
源碼地址：
https://gitee.com/itfitness/WinnListDemo
到這里就結(jié)束啦
評(píng)論
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