Android——支持图片加视频无限轮播的banner

基于https://github.com/youth5201314/banner 扩展，图片+视频无限轮播banner

Demo地址

https://gitee.com/saqino/pic-video-banner-demo.git

demo请自行给予应用权限

说明

使用大佬的banner控件是很方便的，但是对视频+图片无限轮播的支持较弱，所以决定重写几个类实现功能。

不重写无法实现的原因如下：

无限轮播模式下，item大于1时， adapter会自动增加两个item，一个在最前，一个在最后，这样子做是为了滑动的视觉效果。

但是这样子也引发了另外一个问题

在onPageSelected回调中，播放第一个或最后一个视频时无法正确的拿到视频控件，导致通过拿到的position播放的那一个item会有声音但无法见到画面

处理播放时是通过adapter保存的ViewHolder对象来进行播放操作，所以使用HashMap保存对应ViewHolder

这是因为实际使用position获取的ViewHolder并不是当前展示的ViewHolder，实际位置应该是 +1 或者 -1

重写几个关键类返回真实position，可以拿到当前正确的ViewHolder，即可解决该问题。

demo效果

依赖

//banner
implementation  "com.youth.banner:banner:2.1.0"
//视频播放
implementation 'com.shuyu:GSYVideoPlayer:7.1.3'

主要代码

使用方式

public class MainActivity extends AppCompatActivity {@BindView(R.id.banner)ChangeBanner banner;private List<ResourceBean> dataList;private MediaVideoBannerAdapter mAdapter;private BannerVideoManager mBannerVideoManager;private Unbinder unbinder;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);unbinder = ButterKnife.bind(this);initDataList();mAdapter = new MediaVideoBannerAdapter(this, dataList);banner.isAutoLoop(false);banner.setAdapter(mAdapter).setIndicator(new CircleIndicator(this)).setIndicatorGravity(IndicatorConfig.Direction.CENTER);mBannerVideoManager = new BannerVideoManager(this, banner, mAdapter, dataList);mBannerVideoManager.setPageChangeMillis(5000);mBannerVideoManager.setVideoPlayLoadWait(500);}/*** 数据源请自行替换* MediaVideoBannerAdapter也需要修改数据类型*/private void initDataList(){//...}@Overrideprotected void onResume() {super.onResume();mBannerVideoManager.onResume();}@Overrideprotected void onPause() {super.onPause();mBannerVideoManager.onPause();}@Overridepublic void onDetachedFromWindow() {super.onDetachedFromWindow();mBannerVideoManager.onDetachedFromWindow();}@Overrideprotected void onDestroy() {super.onDestroy();unbinder.unbind();}
}

BaseBannerAdapter

重写一个BannerAdapter

在onBindView(holder, mDatas.get(real), real, getRealCount(), position);中将真实存在的position传出

banner源码中不重写无法在适配器中获取到当前真实的position

import android.view.ViewGroup;import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;import com.saqino.picvideobanner.banner.holder.IBaseViewHolder;
import com.youth.banner.listener.OnBannerListener;
import com.youth.banner.util.BannerUtils;import java.util.ArrayList;
import java.util.List;public abstract class BaseBannerAdapter<T, VH extends RecyclerView.ViewHolder> extends RecyclerView.Adapter<VH> implements IBaseViewHolder<T, VH> {protected List<T> mDatas = new ArrayList<>();private OnBannerListener mOnBannerListener;private VH mViewHolder;private int increaseCount = 2;public BaseBannerAdapter(List<T> datas) {setDatas(datas);}public void setDatas(List<T> datas) {if (datas == null) {datas = new ArrayList<>();}mDatas = datas;}public T getData(int position) {return mDatas.get(position);}@Overridepublic final void onBindViewHolder(@NonNull VH holder, int position) {mViewHolder = holder;int real = getRealPosition(position);onBindView(holder, mDatas.get(real), real, getRealCount(), position);if (mOnBannerListener != null)holder.itemView.setOnClickListener(view -> mOnBannerListener.OnBannerClick(mDatas.get(real), real));}@NonNull@Overridepublic VH onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {return onCreateHolder(parent, viewType);}@Overridepublic int getItemCount() {return getRealCount() > 1 ? getRealCount() + increaseCount : getRealCount();}public int getRealCount() {return mDatas == null ? 0 : mDatas.size();}public int getRealPosition(int position) {return BannerUtils.getRealPosition(increaseCount == 2, position, getRealCount());}public void setOnBannerListener(OnBannerListener listener) {this.mOnBannerListener = listener;}public VH getViewHolder() {return mViewHolder;}public void setIncreaseCount(int increaseCount) {this.increaseCount = increaseCount;}
}

MediaVideoBannerAdapter

继承BaseBannerAdapter并实现图片视频viewholder绑定逻辑

使用HashMap保存每个position对应的ViewHolder，方便取用播放视频

ResourceBean是demo使用的数据类型，根据实际情况修改

import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;import androidx.recyclerview.widget.RecyclerView;import com.bumptech.glide.Glide;
import com.saqino.picvideobanner.R;
import com.saqino.picvideobanner.banner.holder.ImageHolder;
import com.saqino.picvideobanner.banner.holder.VideoHolder;
import com.saqino.picvideobanner.bean.ResourceBean;
import com.youth.banner.util.BannerUtils;import java.util.HashMap;
import java.util.List;
import java.util.Map;public class MediaVideoBannerAdapter extends BaseBannerAdapter<ResourceBean, RecyclerView.ViewHolder> {private Context context;private Map<Integer, VideoHolder> videoHolderMap;public interface OnBannerVideoPlayListener{void onVideoPlayStart();void onVideoPlayComplete();}public MediaVideoBannerAdapter(Context context, List<ResourceBean> mDatas) {super(mDatas);this.context = context;videoHolderMap = new HashMap<Integer, VideoHolder>();}@Overridepublic RecyclerView.ViewHolder onCreateHolder(ViewGroup parent, int viewType) {switch (viewType) {case 1:return new ImageHolder(BannerUtils.getView(parent, R.layout.banner_image));case 2:return new VideoHolder(BannerUtils.getView(parent, R.layout.banner_video));/*case 3:return new TitleHolder(BannerUtils.getView(parent, R.layout.banner_title));*/}return new ImageHolder(BannerUtils.getView(parent, R.layout.banner_image));}@Overridepublic int getItemViewType(int position) {return getData(getRealPosition(position)).getType();}@Overridepublic void onBindView(RecyclerView.ViewHolder holder, ResourceBean data, int position, int size, int adapterPosition) {int viewType = holder.getItemViewType();switch (viewType) {case 1:ImageHolder imageHolder = (ImageHolder) holder;Glide.with(imageHolder.itemView).load(data.getUrl()).into(imageHolder.imageView);break;case 2:VideoHolder videoHolder = (VideoHolder) holder;videoHolder.player.setUp(data.getUrl(), true, null);videoHolder.player.getBackButton().setVisibility(View.GONE);//增加封面ImageView imageView = new ImageView(context);imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);//imageView.setImageResource(R.drawable.image4);videoHolder.player.setThumbImageView(imageView);videoHolderMap.put(adapterPosition, videoHolder);break;}}public VideoHolder getVideoHolder(Integer position){return videoHolderMap.get(position);}public void stopVideo(){for (Integer key : videoHolderMap.keySet()){try {if (getVideoHolder(key) != null)getVideoHolder(key).player.onVideoReset();}catch (Throwable e){Log.e("VideoBannerError", "停止视频播放出错 "+e.getLocalizedMessage());}}}
}

ChangeBanner

修改后的Banner控件，主要是修改BannerAdapter的类型

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.os.Build;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.widget.FrameLayout;import androidx.annotation.ColorInt;
import androidx.annotation.ColorRes;
import androidx.annotation.IntDef;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.core.content.ContextCompat;
import androidx.lifecycle.LifecycleOwner;
import androidx.recyclerview.widget.RecyclerView;
import androidx.viewpager.widget.ViewPager;
import androidx.viewpager2.widget.CompositePageTransformer;
import androidx.viewpager2.widget.MarginPageTransformer;
import androidx.viewpager2.widget.ViewPager2;import com.saqino.picvideobanner.R;
import com.saqino.picvideobanner.banner.adapter.BaseBannerAdapter;
import com.saqino.picvideobanner.banner.manager.ScrollSpeedManger;
import com.youth.banner.config.BannerConfig;
import com.youth.banner.config.IndicatorConfig;
import com.youth.banner.indicator.Indicator;
import com.youth.banner.listener.OnBannerListener;
import com.youth.banner.listener.OnPageChangeListener;
import com.youth.banner.transformer.MZScaleInTransformer;
import com.youth.banner.transformer.ScaleInTransformer;
import com.youth.banner.util.BannerLifecycleObserver;
import com.youth.banner.util.BannerLifecycleObserverAdapter;
import com.youth.banner.util.BannerUtils;
import com.youth.banner.util.LogUtils;import java.lang.annotation.Retention;
import java.lang.ref.WeakReference;
import java.util.List;import static java.lang.annotation.RetentionPolicy.SOURCE;public class ChangeBanner<T, BA extends BaseBannerAdapter> extends FrameLayout implements BannerLifecycleObserver {public static final int INVALID_VALUE = -1;private ViewPager2 mViewPager2;private AutoLoopTask mLoopTask;private OnPageChangeListener mOnPageChangeListener;private BA mAdapter;private Indicator mIndicator;private CompositePageTransformer mCompositePageTransformer;private BannerOnPageChangeCallback mPageChangeCallback;// 是否允许无限轮播（即首尾直接切换）private boolean mIsInfiniteLoop = BannerConfig.IS_INFINITE_LOOP;// 是否自动轮播private boolean mIsAutoLoop = BannerConfig.IS_AUTO_LOOP;// 轮播切换间隔时间private long mLoopTime = BannerConfig.LOOP_TIME;// 轮播切换时间private int mScrollTime = BannerConfig.SCROLL_TIME;// 轮播开始位置private int mStartPosition = 1;// banner圆角半径private float mBannerRadius = 0;// 指示器相关配置private int normalWidth = BannerConfig.INDICATOR_NORMAL_WIDTH;private int selectedWidth = BannerConfig.INDICATOR_SELECTED_WIDTH;private int normalColor = BannerConfig.INDICATOR_NORMAL_COLOR;private int selectedColor = BannerConfig.INDICATOR_SELECTED_COLOR;private int indicatorGravity = IndicatorConfig.Direction.CENTER;private int indicatorSpace;private int indicatorMargin;private int indicatorMarginLeft;private int indicatorMarginTop;private int indicatorMarginRight;private int indicatorMarginBottom;private int indicatorHeight = BannerConfig.INDICATOR_HEIGHT;private int indicatorRadius = BannerConfig.INDICATOR_RADIUS;public static final int HORIZONTAL = 0;public static final int VERTICAL = 1;// 滑动距离范围private int mTouchSlop;// 记录触摸的位置（主要用于解决事件冲突问题）private float mStartX, mStartY;// 记录viewpager2是否被拖动private boolean mIsViewPager2Drag;// 是否要拦截事件private boolean isIntercept = true;//绘制圆角视图private Paint mRoundPaint;private Paint mImagePaint;@Retention(SOURCE)@IntDef( {HORIZONTAL, VERTICAL})public @interface Orientation {}public ChangeBanner(Context context) {this(context, null);}public ChangeBanner(Context context, AttributeSet attrs) {this(context, attrs, 0);}public ChangeBanner(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);init(context);initTypedArray(context, attrs);}private void init(Context context) {mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop() / 2;mCompositePageTransformer = new CompositePageTransformer();mPageChangeCallback = new BannerOnPageChangeCallback();mLoopTask = new AutoLoopTask(this);mViewPager2 = new ViewPager2(context);mViewPager2.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));mViewPager2.setOffscreenPageLimit(1);mViewPager2.registerOnPageChangeCallback(mPageChangeCallback);mViewPager2.setPageTransformer(mCompositePageTransformer);ScrollSpeedManger.reflectLayoutManager(this);addView(mViewPager2);mRoundPaint = new Paint();mRoundPaint.setColor(Color.WHITE);mRoundPaint.setAntiAlias(true);mRoundPaint.setStyle(Paint.Style.FILL);mRoundPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));mImagePaint = new Paint();mImagePaint.setXfermode(null);}private void initTypedArray(Context context, AttributeSet attrs) {if (attrs == null) {return;}TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Banner);mBannerRadius = a.getDimensionPixelSize(R.styleable.Banner_banner_radius, 0);mLoopTime = a.getInt(R.styleable.Banner_banner_loop_time, BannerConfig.LOOP_TIME);mIsAutoLoop = a.getBoolean(R.styleable.Banner_banner_auto_loop, BannerConfig.IS_AUTO_LOOP);mIsInfiniteLoop = a.getBoolean(R.styleable.Banner_banner_infinite_loop, BannerConfig.IS_INFINITE_LOOP);normalWidth = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_normal_width, BannerConfig.INDICATOR_NORMAL_WIDTH);selectedWidth = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_selected_width, BannerConfig.INDICATOR_SELECTED_WIDTH);normalColor = a.getColor(R.styleable.Banner_banner_indicator_normal_color, BannerConfig.INDICATOR_NORMAL_COLOR);selectedColor = a.getColor(R.styleable.Banner_banner_indicator_selected_color, BannerConfig.INDICATOR_SELECTED_COLOR);indicatorGravity = a.getInt(R.styleable.Banner_banner_indicator_gravity, IndicatorConfig.Direction.CENTER);indicatorSpace = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_space, 0);indicatorMargin = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_margin, 0);indicatorMarginLeft = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_marginLeft, 0);indicatorMarginTop = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_marginTop, 0);indicatorMarginRight = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_marginRight, 0);indicatorMarginBottom = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_marginBottom, 0);indicatorHeight = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_height, BannerConfig.INDICATOR_HEIGHT);indicatorRadius = a.getDimensionPixelSize(R.styleable.Banner_banner_indicator_radius, BannerConfig.INDICATOR_RADIUS);int orientation = a.getInt(R.styleable.Banner_banner_orientation, HORIZONTAL);setOrientation(orientation);setInfiniteLoop();a.recycle();}private void initIndicatorAttr() {if (indicatorMargin != 0) {setIndicatorMargins(new IndicatorConfig.Margins(indicatorMargin));} else if (indicatorMarginLeft != 0|| indicatorMarginTop != 0|| indicatorMarginRight != 0|| indicatorMarginBottom != 0) {setIndicatorMargins(new IndicatorConfig.Margins(indicatorMarginLeft,indicatorMarginTop,indicatorMarginRight,indicatorMarginBottom));}if (indicatorSpace > 0) {setIndicatorSpace(indicatorSpace);}if (indicatorGravity != IndicatorConfig.Direction.CENTER) {setIndicatorGravity(indicatorGravity);}if (normalWidth > 0) {setIndicatorNormalWidth(normalWidth);}if (selectedWidth > 0) {setIndicatorSelectedWidth(selectedWidth);}if (indicatorHeight > 0) {setIndicatorHeight(indicatorHeight);}if (indicatorRadius > 0) {setIndicatorRadius(indicatorRadius);}setIndicatorNormalColor(normalColor);setIndicatorSelectedColor(selectedColor);}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {if (!getViewPager2().isUserInputEnabled()) {return super.dispatchTouchEvent(ev);}int action = ev.getActionMasked();if (action == MotionEvent.ACTION_UP|| action == MotionEvent.ACTION_CANCEL|| action == MotionEvent.ACTION_OUTSIDE) {start();} else if (action == MotionEvent.ACTION_DOWN) {stop();}return super.dispatchTouchEvent(ev);}@Overridepublic boolean onInterceptTouchEvent(MotionEvent event) {if (!getViewPager2().isUserInputEnabled() || !isIntercept) {return super.onInterceptTouchEvent(event);}switch (event.getAction()) {case MotionEvent.ACTION_DOWN:mStartX = event.getX();mStartY = event.getY();getParent().requestDisallowInterceptTouchEvent(true);break;case MotionEvent.ACTION_MOVE:float endX = event.getX();float endY = event.getY();float distanceX = Math.abs(endX - mStartX);float distanceY = Math.abs(endY - mStartY);if (getViewPager2().getOrientation() == HORIZONTAL) {mIsViewPager2Drag = distanceX > mTouchSlop && distanceX > distanceY;} else {mIsViewPager2Drag = distanceY > mTouchSlop && distanceY > distanceX;}getParent().requestDisallowInterceptTouchEvent(mIsViewPager2Drag);break;case MotionEvent.ACTION_UP:case MotionEvent.ACTION_CANCEL:getParent().requestDisallowInterceptTouchEvent(false);break;}return super.onInterceptTouchEvent(event);}@Overrideprotected void dispatchDraw(Canvas canvas) {if (mBannerRadius > 0) {canvas.saveLayer(new RectF(0, 0, canvas.getWidth(), canvas.getHeight()), mImagePaint, Canvas.ALL_SAVE_FLAG);super.dispatchDraw(canvas);//绘制外圆环边框圆环drawTopLeft(canvas);drawTopRight(canvas);drawBottomLeft(canvas);drawBottomRight(canvas);canvas.restore();} else {super.dispatchDraw(canvas);}}private void drawTopLeft(Canvas canvas) {Path path = new Path();path.moveTo(0, mBannerRadius);path.lineTo(0, 0);path.lineTo(mBannerRadius, 0);path.arcTo(new RectF(0, 0, mBannerRadius * 2, mBannerRadius * 2),-90, -90);path.close();canvas.drawPath(path, mRoundPaint);}private void drawTopRight(Canvas canvas) {int width = getWidth();Path path = new Path();path.moveTo(width - mBannerRadius, 0);path.lineTo(width, 0);path.lineTo(width, mBannerRadius);path.arcTo(new RectF(width - 2 * mBannerRadius, 0, width,mBannerRadius * 2), 0, -90);path.close();canvas.drawPath(path, mRoundPaint);}private void drawBottomLeft(Canvas canvas) {int height = getHeight();Path path = new Path();path.moveTo(0, height - mBannerRadius);path.lineTo(0, height);path.lineTo(mBannerRadius, height);path.arcTo(new RectF(0, height - 2 * mBannerRadius,mBannerRadius * 2, height), 90, 90);path.close();canvas.drawPath(path, mRoundPaint);}private void drawBottomRight(Canvas canvas) {int height = getHeight();int width = getWidth();Path path = new Path();path.moveTo(width - mBannerRadius, height);path.lineTo(width, height);path.lineTo(width, height - mBannerRadius);path.arcTo(new RectF(width - 2 * mBannerRadius, height - 2* mBannerRadius, width, height), 0, 90);path.close();canvas.drawPath(path, mRoundPaint);}@Overrideprotected void onAttachedToWindow() {super.onAttachedToWindow();start();}@Overrideprotected void onDetachedFromWindow() {super.onDetachedFromWindow();stop();}class BannerOnPageChangeCallback extends ViewPager2.OnPageChangeCallback {private int mTempPosition = INVALID_VALUE;private boolean isScrolled;@Overridepublic void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {int realPosition = BannerUtils.getRealPosition(isInfiniteLoop(), position, getRealCount());if (mOnPageChangeListener != null) {mOnPageChangeListener.onPageScrolled(realPosition, positionOffset, positionOffsetPixels);}if (mIndicator != null) {mIndicator.onPageScrolled(realPosition, positionOffset, positionOffsetPixels);}}@Overridepublic void onPageSelected(int position) {if (isScrolled) {mTempPosition = position;int realPosition = BannerUtils.getRealPosition(isInfiniteLoop(), position, getRealCount());if (mOnPageChangeListener != null) {mOnPageChangeListener.onPageSelected(realPosition);}if (mIndicator != null) {mIndicator.onPageSelected(realPosition);}}}@Overridepublic void onPageScrollStateChanged(int state) {//手势滑动中,代码执行滑动中if (state == ViewPager2.SCROLL_STATE_DRAGGING || state == ViewPager2.SCROLL_STATE_SETTLING) {isScrolled = true;} else if (state == ViewPager2.SCROLL_STATE_IDLE) {//滑动闲置或滑动结束isScrolled = false;if (mTempPosition != INVALID_VALUE && mIsInfiniteLoop) {if (mTempPosition == 0) {setCurrentItem(getRealCount(), false);} else if (mTempPosition == getItemCount() - 1) {setCurrentItem(1, false);}}}if (mOnPageChangeListener != null) {mOnPageChangeListener.onPageScrollStateChanged(state);}if (mIndicator != null) {mIndicator.onPageScrollStateChanged(state);}}}static class AutoLoopTask implements Runnable {private final WeakReference<ChangeBanner> reference;AutoLoopTask(ChangeBanner banner) {this.reference = new WeakReference<>(banner);}@Overridepublic void run() {ChangeBanner banner = reference.get();if (banner != null && banner.mIsAutoLoop) {int count = banner.getItemCount();if (count == 0) {return;}int next = (banner.getCurrentItem() + 1) % count;banner.setCurrentItem(next);banner.postDelayed(banner.mLoopTask, banner.mLoopTime);}}}private RecyclerView.AdapterDataObserver mAdapterDataObserver = new RecyclerView.AdapterDataObserver() {@Overridepublic void onChanged() {if (getItemCount() <= 1) {stop();} else {start();}setIndicatorPageChange();}};private void initIndicator() {if (mIndicator == null || getAdapter() == null) {return;}if (mIndicator.getIndicatorConfig().isAttachToBanner()) {removeIndicator();addView(mIndicator.getIndicatorView());}initIndicatorAttr();setIndicatorPageChange();}private void setInfiniteLoop() {// 当不支持无限循环时，要关闭自动轮播if (!isInfiniteLoop()) {isAutoLoop(false);}setStartPosition(isInfiniteLoop() ? 1 : 0);}private void setRecyclerViewPadding(int itemPadding) {setRecyclerViewPadding(itemPadding, itemPadding);}private void setRecyclerViewPadding(int leftItemPadding, int rightItemPadding) {RecyclerView recyclerView = (RecyclerView) getViewPager2().getChildAt(0);if (getViewPager2().getOrientation() == ViewPager2.ORIENTATION_VERTICAL) {recyclerView.setPadding(0, leftItemPadding, 0, rightItemPadding);} else {recyclerView.setPadding(leftItemPadding, 0, rightItemPadding, 0);}recyclerView.setClipToPadding(false);}/*** *********************************************************************** ------------------------ 对外公开API ---------------------------------** ***********************************************************************/public int getCurrentItem() {return getViewPager2().getCurrentItem();}public int getItemCount() {if (getAdapter() == null) {return 0;}return getAdapter().getItemCount();}public int getScrollTime() {return mScrollTime;}public boolean isInfiniteLoop() {return mIsInfiniteLoop;}public BA getAdapter() {if (mAdapter == null) {LogUtils.e(getContext().getString(R.string.banner_adapter_use_error));}return mAdapter;}public ViewPager2 getViewPager2() {return mViewPager2;}public Indicator getIndicator() {if (mIndicator == null) {LogUtils.e(getContext().getString(R.string.indicator_null_error));}return mIndicator;}public IndicatorConfig getIndicatorConfig() {if (getIndicator() != null) {return getIndicator().getIndicatorConfig();}return null;}/*** 返回banner真实总数*/public int getRealCount() {return getAdapter().getRealCount();}//-----------------------------------------------------------------------------------------/*** 是否要拦截事件* @param intercept* @return*/public ChangeBanner setIntercept(boolean intercept) {isIntercept = intercept;return this;}/*** 跳转到指定位置（最好在设置了数据后在调用，不然没有意义）* @param position* @return*/public ChangeBanner setCurrentItem(int position) {return setCurrentItem(position, true);}/*** 跳转到指定位置（最好在设置了数据后在调用，不然没有意义）* @param position* @param smoothScroll* @return*/public ChangeBanner setCurrentItem(int position, boolean smoothScroll) {getViewPager2().setCurrentItem(position, smoothScroll);return this;}public ChangeBanner setIndicatorPageChange() {if (mIndicator != null) {int realPosition = BannerUtils.getRealPosition(isInfiniteLoop(), getCurrentItem(), getRealCount());mIndicator.onPageChanged(getRealCount(), realPosition);}return this;}public ChangeBanner removeIndicator() {if (mIndicator != null) {removeView(mIndicator.getIndicatorView());}return this;}/*** 设置开始的位置 (需要在setAdapter或者setDatas之前调用才有效哦)*/public ChangeBanner setStartPosition(int mStartPosition) {this.mStartPosition = mStartPosition;return this;}/*** 禁止手动滑动** @param enabled true 允许，false 禁止*/public ChangeBanner setUserInputEnabled(boolean enabled) {getViewPager2().setUserInputEnabled(enabled);return this;}/*** 添加PageTransformer，可以组合效果* {@link ViewPager2.PageTransformer}* 如果找不到请导入implementation "androidx.viewpager2:viewpager2:1.0.0"*/public ChangeBanner addPageTransformer(@Nullable ViewPager2.PageTransformer transformer) {mCompositePageTransformer.addTransformer(transformer);return this;}/*** 设置PageTransformer，和addPageTransformer不同，这个只支持一种transformer*/public ChangeBanner setPageTransformer(@Nullable ViewPager2.PageTransformer transformer) {getViewPager2().setPageTransformer(transformer);return this;}public ChangeBanner removeTransformer(ViewPager2.PageTransformer transformer) {mCompositePageTransformer.removeTransformer(transformer);return this;}/*** 添加 ItemDecoration*/public ChangeBanner addItemDecoration(RecyclerView.ItemDecoration decor) {getViewPager2().addItemDecoration(decor);return this;}public ChangeBanner addItemDecoration(RecyclerView.ItemDecoration decor, int index) {getViewPager2().addItemDecoration(decor, index);return this;}/*** 是否允许自动轮播** @param isAutoLoop ture 允许，false 不允许*/public ChangeBanner isAutoLoop(boolean isAutoLoop) {this.mIsAutoLoop = isAutoLoop;return this;}/*** 设置轮播间隔时间** @param loopTime 时间（毫秒）*/public ChangeBanner setLoopTime(long loopTime) {this.mLoopTime = loopTime;return this;}/*** 设置轮播滑动过程的时间*/public ChangeBanner setScrollTime(int scrollTime) {this.mScrollTime = scrollTime;return this;}/*** 开始轮播*/public ChangeBanner start() {if (mIsAutoLoop) {stop();postDelayed(mLoopTask, mLoopTime);}return this;}/*** 停止轮播*/public ChangeBanner stop() {if (mIsAutoLoop) {removeCallbacks(mLoopTask);}return this;}/*** 移除一些引用*/public void destroy() {if (getViewPager2() != null && mPageChangeCallback != null) {getViewPager2().unregisterOnPageChangeCallback(mPageChangeCallback);mPageChangeCallback = null;}stop();}/*** 设置banner的适配器*/public ChangeBanner setAdapter(BA adapter) {if (adapter == null) {throw new NullPointerException(getContext().getString(R.string.banner_adapter_null_error));}this.mAdapter = adapter;if (!isInfiniteLoop()) {mAdapter.setIncreaseCount(0);}mAdapter.registerAdapterDataObserver(mAdapterDataObserver);mViewPager2.setAdapter(adapter);setCurrentItem(mStartPosition, false);initIndicator();return this;}/*** 设置banner的适配器* @param adapter* @param isInfiniteLoop 是否支持无限循环* @return*/public ChangeBanner setAdapter(BA adapter,boolean isInfiniteLoop) {mIsInfiniteLoop=isInfiniteLoop;setInfiniteLoop();setAdapter(adapter);return this;}/*** 重新设置banner数据，当然你也可以在你adapter中自己操作数据,不要过于局限在这个方法，举一反三哈** @param datas 数据集合，当传null或者datas没有数据时，banner会变成空白的，请做好占位UI处理*/public ChangeBanner setDatas(List<T> datas) {if (getAdapter() != null) {getAdapter().setDatas(datas);getAdapter().notifyDataSetChanged();setCurrentItem(mStartPosition, false);setIndicatorPageChange();start();}return this;}/*** 设置banner轮播方向** @param orientation {@link Orientation}*/public ChangeBanner setOrientation(@Orientation int orientation) {getViewPager2().setOrientation(orientation);return this;}/*** 改变最小滑动距离*/public ChangeBanner setTouchSlop(int mTouchSlop) {this.mTouchSlop = mTouchSlop;return this;}/*** 设置点击事件*/public ChangeBanner setOnBannerListener(OnBannerListener listener) {if (getAdapter() != null) {getAdapter().setOnBannerListener(listener);}return this;}/*** 添加viewpager切换事件* <p>* 在viewpager2中切换事件{@link ViewPager2.OnPageChangeCallback}是一个抽象类，* 为了方便使用习惯这里用的是和viewpager一样的{@link ViewPager.OnPageChangeListener}接口* </p>*/public ChangeBanner addOnPageChangeListener(OnPageChangeListener pageListener) {this.mOnPageChangeListener = pageListener;return this;}/*** 设置banner圆角* <p>* 默认没有圆角，需要取消圆角把半径设置为0即可** @param radius 圆角半径*/public ChangeBanner setBannerRound(float radius) {mBannerRadius = radius;return this;}/*** 设置banner圆角(第二种方式，和上面的方法不要同时使用)，只支持5.0以上*/@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)public ChangeBanner setBannerRound2(float radius) {BannerUtils.setBannerRound(this, radius);return this;}/*** 为banner添加画廊效果** @param itemWidth  item左右展示的宽度,单位dp* @param pageMargin 页面间距,单位dp*/public ChangeBanner setBannerGalleryEffect(int itemWidth, int pageMargin) {return setBannerGalleryEffect(itemWidth, pageMargin, .85f);}/*** 为banner添加画廊效果** @param leftItemWidth  item左展示的宽度,单位dp* @param rightItemWidth  item右展示的宽度,单位dp* @param pageMargin 页面间距,单位dp*/public ChangeBanner setBannerGalleryEffect(int leftItemWidth, int rightItemWidth, int pageMargin) {return setBannerGalleryEffect(leftItemWidth,rightItemWidth, pageMargin, .85f);}/*** 为banner添加画廊效果** @param itemWidth  item左右展示的宽度,单位dp* @param pageMargin 页面间距,单位dp* @param scale      缩放[0-1],1代表不缩放*/public ChangeBanner setBannerGalleryEffect(int itemWidth, int pageMargin, float scale) {return setBannerGalleryEffect(itemWidth, itemWidth, pageMargin, scale);}/*** 为banner添加画廊效果** @param leftItemWidth  item左展示的宽度,单位dp* @param rightItemWidth  item右展示的宽度,单位dp* @param pageMargin 页面间距,单位dp* @param scale      缩放[0-1],1代表不缩放*/public ChangeBanner setBannerGalleryEffect(int leftItemWidth, int rightItemWidth, int pageMargin, float scale) {if (pageMargin > 0) {addPageTransformer(new MarginPageTransformer((int) BannerUtils.dp2px(pageMargin)));}if (scale < 1 && scale > 0) {addPageTransformer(new ScaleInTransformer(scale));}setRecyclerViewPadding(leftItemWidth > 0 ? (int) BannerUtils.dp2px(leftItemWidth + pageMargin) : 0,rightItemWidth > 0 ? (int) BannerUtils.dp2px(rightItemWidth + pageMargin) : 0);return this;}/*** 为banner添加魅族效果** @param itemWidth item左右展示的宽度,单位dp*/public ChangeBanner setBannerGalleryMZ(int itemWidth) {return setBannerGalleryMZ(itemWidth, .88f);}/*** 为banner添加魅族效果** @param itemWidth item左右展示的宽度,单位dp* @param scale     缩放[0-1],1代表不缩放*/public ChangeBanner setBannerGalleryMZ(int itemWidth, float scale) {if (scale < 1 && scale > 0) {addPageTransformer(new MZScaleInTransformer(scale));}setRecyclerViewPadding((int) BannerUtils.dp2px(itemWidth));return this;}/*** *********************************************************************** ------------------------ 指示器相关设置 --------------------------------** ***********************************************************************//*** 设置轮播指示器(显示在banner上)*/public ChangeBanner setIndicator(Indicator indicator) {return setIndicator(indicator, true);}/*** 设置轮播指示器(如果你的指示器写在布局文件中，attachToBanner传false)** @param attachToBanner 是否将指示器添加到banner中，false 代表你可以将指示器通过布局放在任何位置*                       注意：设置为false后，内置的 setIndicatorGravity()和setIndicatorMargins() 方法将失效。*                       想改变可以自己调用系统提供的属性在布局文件中进行设置。具体可以参照demo*/public ChangeBanner setIndicator(Indicator indicator, boolean attachToBanner) {removeIndicator();indicator.getIndicatorConfig().setAttachToBanner(attachToBanner);this.mIndicator = indicator;initIndicator();return this;}public ChangeBanner setIndicatorSelectedColor(@ColorInt int color) {if (mIndicator != null) {mIndicator.getIndicatorConfig().setSelectedColor(color);}return this;}public ChangeBanner setIndicatorSelectedColorRes(@ColorRes int color) {setIndicatorSelectedColor(ContextCompat.getColor(getContext(), color));return this;}public ChangeBanner setIndicatorNormalColor(@ColorInt int color) {if (mIndicator != null) {mIndicator.getIndicatorConfig().setNormalColor(color);}return this;}public ChangeBanner setIndicatorNormalColorRes(@ColorRes int color) {setIndicatorNormalColor(ContextCompat.getColor(getContext(), color));return this;}public ChangeBanner setIndicatorGravity(@IndicatorConfig.Direction int gravity) {if (mIndicator != null && mIndicator.getIndicatorConfig().isAttachToBanner()) {mIndicator.getIndicatorConfig().setGravity(gravity);mIndicator.getIndicatorView().postInvalidate();}return this;}public ChangeBanner setIndicatorSpace(int indicatorSpace) {if (mIndicator != null) {mIndicator.getIndicatorConfig().setIndicatorSpace(indicatorSpace);}return this;}public ChangeBanner setIndicatorMargins(IndicatorConfig.Margins margins) {if (mIndicator != null && mIndicator.getIndicatorConfig().isAttachToBanner()) {mIndicator.getIndicatorConfig().setMargins(margins);mIndicator.getIndicatorView().requestLayout();}return this;}public ChangeBanner setIndicatorWidth(int normalWidth, int selectedWidth) {if (mIndicator != null) {mIndicator.getIndicatorConfig().setNormalWidth(normalWidth);mIndicator.getIndicatorConfig().setSelectedWidth(selectedWidth);}return this;}public ChangeBanner setIndicatorNormalWidth(int normalWidth) {if (mIndicator != null) {mIndicator.getIndicatorConfig().setNormalWidth(normalWidth);}return this;}public ChangeBanner setIndicatorSelectedWidth(int selectedWidth) {if (mIndicator != null) {mIndicator.getIndicatorConfig().setSelectedWidth(selectedWidth);}return this;}public ChangeBanner<T, BA> setIndicatorRadius(int indicatorRadius) {if (mIndicator != null) {mIndicator.getIndicatorConfig().setRadius(indicatorRadius);}return this;}public ChangeBanner<T, BA> setIndicatorHeight(int indicatorHeight) {if (mIndicator != null) {mIndicator.getIndicatorConfig().setHeight(indicatorHeight);}return this;}/*** *********************************************************************** ------------------------ 生命周期控制 --------------------------------** ***********************************************************************/public ChangeBanner addBannerLifecycleObserver(LifecycleOwner owner) {if (owner != null) {owner.getLifecycle().addObserver(new BannerLifecycleObserverAdapter(owner, this));}return this;}@Overridepublic void onStart(LifecycleOwner owner) {start();}@Overridepublic void onStop(LifecycleOwner owner) {stop();}@Overridepublic void onDestroy(LifecycleOwner owner) {destroy();}}

manager相关类

用于处理轮播及Activity生命周期相关的事件

BannerVideoManager

import android.content.Context;
import android.os.Handler;
import android.widget.Toast;import com.saqino.picvideobanner.banner.ChangeBanner;
import com.saqino.picvideobanner.banner.adapter.MediaVideoBannerAdapter;
import com.saqino.picvideobanner.banner.holder.VideoHolder;
import com.saqino.picvideobanner.bean.ResourceBean;
import com.shuyu.gsyvideoplayer.listener.GSYSampleCallBack;
import com.youth.banner.listener.OnPageChangeListener;import java.util.List;public class BannerVideoManager {private Context context;private ChangeBanner banner;private MediaVideoBannerAdapter adapter;//数据源，请自行替换private List<ResourceBean> list;private long mPageChangeMillis = 5000;private long mVideoPlayLoadWait = 500;public BannerVideoManager(Context context, ChangeBanner banner,MediaVideoBannerAdapter adapter, List<ResourceBean> list){this.context = context;this.banner = banner;this.adapter = adapter;this.list = list;banner.addOnPageChangeListener(new BannerPageChange());}//设置切换间隔时间，单位毫秒public void setPageChangeMillis(long mills){this.mPageChangeMillis = mills;}/*** 设置视频播放前置等待时间，单位毫秒** 设置为无限轮播时，适配器中会多出两个ViewHolder* 需要给banner自动切换ViewHolder一点时间* 保证获取到的ViewHolder是当前展示的那一个** @param mills*/public void setVideoPlayLoadWait(long mills){this.mVideoPlayLoadWait = mills;}/*** 视频+图片轮播处理代码*/private VideoHolder currentVideoHolder = null;private class BannerPageChange implements OnPageChangeListener {@Overridepublic void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}@Overridepublic void onPageSelected(int position) {mPosition = position;if (adapter != null){currentVideoHolder = null;//当前页不是视频类型if (list.get(position).getType() != 2) {adapter.stopVideo();if (videoPlayRunnable != null) mHandler.removeCallbacks(videoPlayRunnable);startScroll(mPageChangeMillis);}else {//视频类型，且仅有一个视频，自动重播if (list.size() == 1)playVideo(0, position);else {playVideo(mVideoPlayLoadWait, position+1);}stopScroll();}}}@Overridepublic void onPageScrollStateChanged(int state) {}}//当前position（显示出来的position，非真实positionprivate int mPosition = 0;private Handler mHandler = new Handler();//轮播切换的runnableprivate Runnable runnable = new Runnable() {@Overridepublic void run() {mHandler.removeCallbacks(runnable);banner.setCurrentItem(banner.getCurrentItem() + 1, true);}};//控制视频播放private Runnable videoPlayRunnable;private void playVideo(long millis, int position){if (videoPlayRunnable != null) mHandler.removeCallbacks(videoPlayRunnable);videoPlayRunnable = new Runnable(){@Overridepublic void run() {if (position == 1 && list.size() > 1 && banner.getCurrentItem() != 1){banner.setCurrentItem(1, false);return;}VideoHolder videoHolder = adapter.getVideoHolder(position);if (videoHolder == null) {showToast("获取视频播放控件出错");return;}videoHolder.player.onVideoReset();videoHolder.player.startPlayLogic();videoHolder.player.setVideoAllCallBack(new GSYSampleCallBack(){@Overridepublic void onAutoComplete(String url, Object... objects) {super.onAutoComplete(url, objects);if (position == 0) videoHolder.player.startPlayLogic();else startScroll(0);}});currentVideoHolder = videoHolder;}};mHandler.postDelayed(videoPlayRunnable, millis);}//开始切换private void startScroll(long millis){mHandler.postDelayed(runnable, millis);}//停止切换private void stopScroll(){mHandler.removeCallbacks(runnable);}private void showToast(String str){Toast.makeText(context, str, Toast.LENGTH_SHORT).show();}//Activity生命周期控制public void onPause(){stopScroll();if (currentVideoHolder != null) currentVideoHolder.player.onVideoPause();mHandler.removeCallbacks(videoPlayRunnable);}//Activity生命周期控制public void onResume(){if (list == null) return;if (list.size() == 0) return;if (list.get(mPosition).getType() == 2) {if (currentVideoHolder != null) currentVideoHolder.player.onVideoResume();else {if (list.size() == 1)playVideo(mVideoPlayLoadWait, mPosition);else playVideo(mVideoPlayLoadWait, mPosition+1);}}else startScroll(mPageChangeMillis);}//Activity生命周期控制public void onDetachedFromWindow(){stopScroll();}
}

ScrollSpeedManger

原项目中的一个管理类，修改了adapter的类型

import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.LinearSmoothScroller;
import androidx.recyclerview.widget.RecyclerView;
import androidx.viewpager2.widget.ViewPager2;import com.saqino.picvideobanner.banner.ChangeBanner;import java.lang.reflect.Field;/*** 改变LinearLayoutManager的切换速度*/
public class ScrollSpeedManger extends LinearLayoutManager {private ChangeBanner banner;public ScrollSpeedManger(ChangeBanner banner, LinearLayoutManager linearLayoutManager) {super(banner.getContext(), linearLayoutManager.getOrientation(), false);this.banner = banner;}@Overridepublic void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {LinearSmoothScroller linearSmoothScroller = new LinearSmoothScroller(recyclerView.getContext()) {@Overrideprotected int calculateTimeForDeceleration(int dx) {return banner.getScrollTime();}};linearSmoothScroller.setTargetPosition(position);startSmoothScroll(linearSmoothScroller);}public static void reflectLayoutManager(ChangeBanner banner) {if (banner.getScrollTime() < 100) return;try {ViewPager2 viewPager2 = banner.getViewPager2();RecyclerView recyclerView = (RecyclerView) viewPager2.getChildAt(0);recyclerView.setOverScrollMode(RecyclerView.OVER_SCROLL_NEVER);ScrollSpeedManger speedManger = new ScrollSpeedManger(banner, (LinearLayoutManager) recyclerView.getLayoutManager());recyclerView.setLayoutManager(speedManger);Field LayoutMangerField = ViewPager2.class.getDeclaredField("mLayoutManager");LayoutMangerField.setAccessible(true);LayoutMangerField.set(viewPager2, speedManger);Field pageTransformerAdapterField = ViewPager2.class.getDeclaredField("mPageTransformerAdapter");pageTransformerAdapterField.setAccessible(true);Object mPageTransformerAdapter = pageTransformerAdapterField.get(viewPager2);if (mPageTransformerAdapter != null) {Class<?> aClass = mPageTransformerAdapter.getClass();Field layoutManager = aClass.getDeclaredField("mLayoutManager");layoutManager.setAccessible(true);layoutManager.set(mPageTransformerAdapter, speedManger);}Field scrollEventAdapterField = ViewPager2.class.getDeclaredField("mScrollEventAdapter");scrollEventAdapterField.setAccessible(true);Object mScrollEventAdapter = scrollEventAdapterField.get(viewPager2);if (mScrollEventAdapter != null) {Class<?> aClass = mScrollEventAdapter.getClass();Field layoutManager = aClass.getDeclaredField("mLayoutManager");layoutManager.setAccessible(true);layoutManager.set(mScrollEventAdapter, speedManger);}} catch (Exception e) {e.printStackTrace();}}}

Holder类

import android.view.View;import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;import com.saqino.picvideobanner.R;
import com.shuyu.gsyvideoplayer.video.StandardGSYVideoPlayer;public class VideoHolder extends RecyclerView.ViewHolder  {public StandardGSYVideoPlayer player;public VideoHolder(@NonNull View view) {super(view);player = view.findViewById(R.id.player);}
}

import android.view.ViewGroup;public interface IBaseViewHolder<T, VH> {/*** 创建ViewHolder** @return XViewHolder*/VH onCreateHolder(ViewGroup parent, int viewType);/*** 绑定布局数据** @param holder   XViewHolder* @param data     数据实体* @param position 当前位置* @param size     总数*/void onBindView(VH holder, T data, int position, int size, int adapterPosition);
}

import android.view.View;
import android.widget.ImageView;import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;public class ImageHolder extends RecyclerView.ViewHolder {public ImageView imageView;public ImageHolder(@NonNull View view) {super(view);this.imageView = (ImageView) view;}
}