android RecyclerView列表自动播放实现

package com.androidlmy.jzplayer; import androidx.appcompat.app.AppCompatActivity; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import android.content.Context; import android.graphics.Rect; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import cn.jzvd.Jzvd; import static cn.jzvd.Jzvd.STATE_PAUSE; import static cn.jzvd.Jzvd.STATE_PLAYING; public class MainActivity extends AppCompatActivity { private RecyclerView recyclerView; private PlayerAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); recyclerView = findViewById(R.id.recycler_view); adapter = new PlayerAdapter(this); recyclerView.setLayoutManager(new LinearLayoutManager(this)); recyclerView.setAdapter(adapter); recyclerView.addOnChildAttachStateChangeListener(new RecyclerView.OnChildAttachStateChangeListener() { @Override public void onChildViewAttachedToWindow(View view) { // item依附到recyclerview中时 } @Override public void onChildViewDetachedFromWindow(View view) { // item从recyclerview中分离时 Jzvd jzvd = view.findViewById(R.id.videoplayer); if (jzvd != null && Jzvd.CURRENT_JZVD != null && jzvd.jzDataSource.containsTheUrl(Jzvd.CURRENT_JZVD.jzDataSource.getCurrentUrl())) { if (Jzvd.CURRENT_JZVD != null && Jzvd.CURRENT_JZVD.screen != Jzvd.SCREEN_FULLSCREEN) { // 释放播放器资源 Jzvd.releaseAllVideos(); } } } }); recyclerView.addOnScrollListener(new AutoPlayScrollListener(this)); } /** * 监听recycleView滑动状态， * 自动播放可见区域内的第一个视频 */ private static class AutoPlayScrollListener extends RecyclerView.OnScrollListener { private int firstVisibleItem = 0; private int lastVisibleItem = 0; private int visibleCount = 0; private Context context; public AutoPlayScrollListener(Context context) { this.context = context; } /** * 被处理的视频状态标签 */ private enum VideoTagEnum { /** * 自动播放视频 */ TAG_AUTO_PLAY_VIDEO, /** * 暂停视频 */ TAG_PAUSE_VIDEO } @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); switch (newState) { case RecyclerView.SCROLL_STATE_IDLE://停止滚动 autoPlayVideo(recyclerView, VideoTagEnum.TAG_AUTO_PLAY_VIDEO); case RecyclerView.SCROLL_STATE_DRAGGING://开始滚动 case RecyclerView.SCROLL_STATE_SETTLING://滑行中 default: // autoPlayVideo(recyclerView, VideoTagEnum.TAG_PAUSE_VIDEO);//滑动时暂停视频 需要可以加上 break; } } @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); RecyclerView.LayoutManager layoutManager = recyclerView.getLayoutManager(); if (layoutManager instanceof LinearLayoutManager) { LinearLayoutManager linearManager = (LinearLayoutManager) layoutManager; firstVisibleItem = linearManager.findFirstVisibleItemPosition(); lastVisibleItem = linearManager.findLastVisibleItemPosition(); visibleCount = lastVisibleItem - firstVisibleItem; } } /** * 循环遍历可见区域的播放器 * 然后通过 getLocalVisibleRect(rect)方法计算出哪个播放器完全显示出来 * @param recyclerView * @param handleVideoTag 视频需要进行状态 */ private void autoPlayVideo(RecyclerView recyclerView, VideoTagEnum handleVideoTag) { for (int i = 0; i < visibleCount; i++) { if (recyclerView != null && recyclerView.getChildAt(i) != null && recyclerView.getChildAt(i).findViewById(R.id.videoplayer) != null) { MyJzvdStd homeGSYVideoPlayer = (MyJzvdStd) recyclerView.getChildAt(i).findViewById(R.id.videoplayer); Rect rect = new Rect(); homeGSYVideoPlayer.getLocalVisibleRect(rect); int videoheight = homeGSYVideoPlayer.getHeight(); if (rect.top == 0 && rect.bottom == videoheight) { handleVideo(handleVideoTag, homeGSYVideoPlayer); // 跳出循环，只处理可见区域内的第一个播放器 break; } } } } /** * 视频状态处理 * * @param handleVideoTag 视频需要进行状态 * @param homeGSYVideoPlayer JZVideoPlayer播放器 */ private void handleVideo(VideoTagEnum handleVideoTag, MyJzvdStd homeGSYVideoPlayer) { switch (handleVideoTag) { case TAG_AUTO_PLAY_VIDEO: if ((homeGSYVideoPlayer.state != STATE_PLAYING)) { // 进行播放 homeGSYVideoPlayer.startVideo(); } break; case TAG_PAUSE_VIDEO: if ((homeGSYVideoPlayer.state != STATE_PAUSE)) { // 模拟点击,暂停视频 homeGSYVideoPlayer.startButton.performClick(); } break; default: break; } } } /** * 拦截返回键 返回不退出程序 */ @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (Jzvd.backPress()) { return true; } else { if (keyCode == KeyEvent.KEYCODE_BACK) { moveTaskToBack(true); return true; } } return super.onKeyDown(keyCode, event); } }