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播放的View上滑至消失一半以上的时候，停止播放，自动播放下一个视频
播放的View下滑至消失一半以上的时候，停止播放，自动播放上一个视频
上滑：播放视频的item view的顶部Y坐标（相对于整个屏幕）和recyclerview顶部Y坐标（相对于整个屏幕）进行对比，判断是否需要停止播放，自动播放其他视频等； 下滑：同理
参考万能适配器 activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.cy.cyrvadapter.recyclerview.VerticalRecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/vrv" />
</RelativeLayout>
item.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tv"
android:layout_width="match_parent"
android:background="#eee"
android:gravity="center"
android:textSize="18sp"
android:textColor="#454545"
android:layout_marginBottom="10dp"
android:layout_height="200dp">
</TextView>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private RVAdapter<PlayBean> rvAdapter;
private int position_play = -1;//播放的位置
//用户手动点击播放后，自动播放开始，
// 除非用户手动点击停止，或者视频播放完毕，停止自动播放，
private boolean isLooper = false;
private int looperFlag = 0;//0,无自动播放，1.自动播放上一个，2自动播放下一个
private List<PlayBean> list;
private VerticalRecyclerView verticalRecyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list = new ArrayList<>();
//播放状态 0播放，1停止
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
list.add(new PlayBean(1));
/**
* 万能适配器，参考https://github.com/AnJiaoDe/RecyclerViewAdapter
*/
rvAdapter = new RVAdapter<PlayBean>(list) {
@Override
public void bindDataToView(RVViewHolder holder, int position, PlayBean bean, boolean isSelected) {
int state = bean.getState();
String tv_text = "";
//播放状态 0播放，1停止
switch (state) {
case 0:
tv_text = position + "正在播放";
holder.setTextColor(R.id.tv, 0xffff0000);
break;
case 1:
tv_text = position + "停止";
holder.setTextColor(R.id.tv, 0xff454545);
break;
}
holder.setText(R.id.tv, tv_text);
}
@Override
public int getItemLayoutID(int position, PlayBean bean) {
return R.layout.item;
}
@Override
public void onItemClick(int position, PlayBean bean) {
//播放状态 0播放，1停止
int state = bean.getState();
switch (state) {
case 0:
bean.setState(1);
isLooper = false;//自动播放停止
break;
case 1:
if (position_play != -1)
list.get(position_play).setState(1);//上次播放的要停止
position_play = position;
bean.setState(0);
isLooper = true;//自动播放开始
break;
}
notifyDataSetChanged();
}
};
verticalRecyclerView = ((VerticalRecyclerView) findViewById(R.id.vrv));
verticalRecyclerView.setAdapter(rvAdapter);
verticalRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
//滑动停止后，
if (newState == RecyclerView.SCROLL_STATE_IDLE && isLooper && looperFlag != 0) {
LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
switch (looperFlag) {
case 1:
int position_lastVisible=layoutManager.findLastVisibleItemPosition();
if (position_lastVisible==position_play){
//自动播放上一个
position_play-=1;
}else {
//最后一个可见的item和滑出去的上次播放的view隔了N(N>=1)个Item,所以自动播放倒数第2个可见的item
position_play=position_lastVisible-1;
}
break;
case 2:
int position_firstVisible=layoutManager.findFirstVisibleItemPosition();
if (position_firstVisible==position_play){
//自动播放下一个
position_play+=1;
}else {
//第一个可见的item和滑出去的上次播放的view隔了N(N>=1)个Item,所以自动播放第2个可见的item
position_play=position_firstVisible+1;
}
break;
}
list.get(position_play).setState(0);
rvAdapter.notifyItemChanged(position_play);
//注意
looperFlag=0;
}
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
if (!isLooper) return;
LinearLayoutManager layoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
View view = layoutManager.findViewByPosition(position_play);
//说明播放的view还未完全消失
if (view != null) {
int y_t_rv = ScreenUtils.getViewScreenLocation(verticalRecyclerView)[1];//RV顶部Y坐标
int y_b_rv = y_t_rv + verticalRecyclerView.getHeight();//RV底部Y坐标
int y_t_view = ScreenUtils.getViewScreenLocation(view)[1];//播放的View顶部Y坐标
int height_view = view.getHeight();
int y_b_view = y_t_view + height_view;//播放的View底部Y坐标
//上滑
if (dy > 0) {
//播放的View上滑，消失了一半了,停止播放，
if ((y_t_rv > y_t_view) && ((y_t_rv - y_t_view) > height_view * 1f / 2)) {
list.get(position_play).setState(1);
rvAdapter.notifyItemChanged(position_play);
looperFlag = 2;//自动播放下一个
}
} else if (dy < 0) {
//下滑
// LogUtils.log("y_t_rv", y_t_rv);
// LogUtils.log("y_b_rv", y_b_rv);
//播放的View下滑，消失了一半了,停止播放
if ((y_b_view > y_b_rv) && ((y_b_view - y_b_rv) > height_view * 1f / 2)) {
list.get(position_play).setState(1);
rvAdapter.notifyItemChanged(position_play);
looperFlag = 1;//自动播放上一个
}
}
}
}
});
}
}
GitHub https://github.com/AnJiaoDe
关注专题Android开发常用开源库https://www.jianshu.com/c/3ff4b3951dc5
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