主要处理的地方:
1、RecyclerView中Adapter的item个人可以无限轮询.
2、RecyclerView自动滑动
3、手指按下时滑动停止,手指抬起后继续自动滑动
public class AutoPollRecyclerView extends RecyclerView { private static final long TIME_AUTO_POLL = 16; AutoPollTask autoPollTask; private boolean running; //标示是否正在自动轮询 private boolean canRun;//标示是否可以自动轮询,可在不需要的是否置false public AutoPollRecyclerView(Context context, @Nullable AttributeSet attrs) {super(context, attrs);autoPollTask = new AutoPollTask(this); } static class AutoPollTask implements Runnable {private final WeakReference<AutoPollRecyclerView> mReference;//使用弱引用持有外部类引用->防止内存泄漏public AutoPollTask(AutoPollRecyclerView reference) { this.mReference = new WeakReference<AutoPollRecyclerView>(reference);}@Overridepublic void run() { AutoPollRecyclerView recyclerView = mReference.get(); if (recyclerView != null && recyclerView.running &&recyclerView.canRun) {recyclerView.scrollBy(2, 2);recyclerView.postDelayed(recyclerView.autoPollTask,recyclerView.TIME_AUTO_POLL); }} } //开启:如果正在运行,先停止->再开启 public void start() {if (running) stop();canRun = true;running = true;postDelayed(autoPollTask,TIME_AUTO_POLL); } public void stop(){running = false;removeCallbacks(autoPollTask); } @Override public boolean onTouchEvent(MotionEvent e) {switch (e.getAction()){ case MotionEvent.ACTION_DOWN:if (running) stop();break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_OUTSIDE:if (canRun) start();break;}return super.onTouchEvent(e); }}Adapter处理:主要处理getItemCount()和数据填充的onBindViewHolder()方法
public class AutoPollAdapter extends RecyclerView.Adapter<BaseViewHolder> { private final Context mContext; private final List<String> mData; public AutoPollAdapter(Context context, List<String> list) {this.mContext = context;this.mData = list; } @Override public BaseViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {View view = LayoutInflater.from(mContext).inflate(R.layout.item_auto_poll, parent, false);BaseViewHolder holder = new BaseViewHolder(view);return holder; } @Override public void onBindViewHolder(BaseViewHolder holder, int position) {String data = mData.get(position%mData.size());holder.setText(R.id.tv_content,data); } @Override public int getItemCount() {return Integer.MAX_VALUE; }}最后附上Activity调用的代码
public class AutoPollRecyclerActivity extends BaseActivity { @Override protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_auto_poll);initToolBar();initView(); } private void initView() {AutoPollRecyclerView mRecyclerView = (AutoPollRecyclerView) findViewById(R.id.rv_recycleView);List<String> list = new ArrayList<>();for (int i = 0; i < 5; ) { list.add(" Item: " + ++i);}AutoPollAdapter adapter = new AutoPollAdapter(this, list);mRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false));mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.HORIZONTAL_LIST));mRecyclerView.setAdapter(adapter);if (true) //保证itemCount的总个数宽度超过屏幕宽度->自己处理 mRecyclerView.start(); }}以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。