Android如何实现商品详情页功能

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先看看效果实现

由于代码量过多, 就不一一讲解只介绍几个核心的自定义控件)

                                                                                                                    
ItemWebView是SlideDetailsLayout的子View (SlideDetailsLayout代码太多, 放到了***)
功能为显示商品简介的webview
防止往上滑动时会直接滑动到***个View
实现滑动到WebView顶部时, 让父控件重新获得触摸事件
/**  * 商品详情页底部的webview  */ public class ItemWebView extends WebView {     public float oldY;     private int t;     private float oldX;      public ItemWebView(Context context) {         super(context);     }      public ItemWebView(Context context, AttributeSet attrs) {         super(context, attrs);     }      public ItemWebView(Context context, AttributeSet attrs, int defStyleAttr) {         super(context, attrs, defStyleAttr);     }       @Override     public boolean onTouchEvent(MotionEvent ev) {          switch (ev.getAction()) {             case MotionEvent.ACTION_MOVE:                 float Y = ev.getY();                 float Ys = Y - oldY;                 float X = ev.getX();                  //滑动到顶部让父控件重新获得触摸事件                 if (Ys > 0 && t == 0) {                     getParent().getParent().requestDisallowInterceptTouchEvent(false);                 }                 break;              case MotionEvent.ACTION_DOWN:                 getParent().getParent().requestDisallowInterceptTouchEvent(true);                 oldY = ev.getY();                 oldX = ev.getX();                 break;              case MotionEvent.ACTION_UP:                 getParent().getParent().requestDisallowInterceptTouchEvent(true);                 break;              default:                 break;         }         return super.onTouchEvent(ev);     }      @Override     protected void onScrollChanged(int l, int t, int oldl, int oldt) {         this.t = t;         super.onScrollChanged(l, t, oldl, oldt);     }  }
ItemListView 也是SlideDetailsLayout的子View
和ItemWebView功能大致一样
/**  * 商品详情页底部的ListView  */ public class ItemListView extends ListView implements AbsListView.OnScrollListener {     private float oldX, oldY;     private int currentPosition;      public ItemListView(Context context) {         super(context);         setOnScrollListener(this);     }      public ItemListView(Context context, AttributeSet attrs) {         super(context, attrs);         setOnScrollListener(this);     }      public ItemListView(Context context, AttributeSet attrs, int defStyleAttr) {         super(context, attrs, defStyleAttr);         setOnScrollListener(this);     }       @Override     public boolean onTouchEvent(MotionEvent ev) {         switch (ev.getAction()) {             case MotionEvent.ACTION_MOVE:                 float Y = ev.getY();                 float Ys = Y - oldY;                 float X = ev.getX();                 int [] location = new int [2];                 getLocationInWindow(location);                  //滑动到顶部让父控件重新获得触摸事件                 if (Ys > 0 && currentPosition == 0) {                     getParent().getParent().requestDisallowInterceptTouchEvent(false);                 }                 break;              case MotionEvent.ACTION_DOWN:                 getParent().getParent().requestDisallowInterceptTouchEvent(true);                 oldY = ev.getY();                 oldX = ev.getX();                 break;              case MotionEvent.ACTION_UP:                 getParent().getParent().requestDisallowInterceptTouchEvent(true);                 break;              default:                 break;         }         return super.onTouchEvent(ev);     }      @Override     public void onScrollStateChanged(AbsListView view, int scrollState) {         currentPosition = getFirstVisiblePosition();     }      @Override     public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {      } }
NoScrollViewPager为最外层的父布局
当滑动到图文详情模块时, 能禁止掉ViewPager的滑动事件
/**  * 提供禁止滑动功能的自定义ViewPager  */ public class NoScrollViewPager extends ViewPager {     private boolean noScroll = false;      public NoScrollViewPager(Context context, AttributeSet attrs) {         super(context, attrs);     }       public NoScrollViewPager(Context context) {         super(context);     }      public void setNoScroll(boolean noScroll) {         this.noScroll = noScroll;     }      @Override     public void scrollTo(int x, int y) {         super.scrollTo(x, y);     }      @Override     public boolean onTouchEvent(MotionEvent arg0) {         if (noScroll)             return false;         else             return super.onTouchEvent(arg0);     }      @Override     public boolean onInterceptTouchEvent(MotionEvent arg0) {         if (noScroll)             return false;         else             return super.onInterceptTouchEvent(arg0);     }      @Override     public void setCurrentItem(int item, boolean smoothScroll) {         super.setCurrentItem(item, smoothScroll);     }      @Override     public void setCurrentItem(int item) {         super.setCurrentItem(item);     }  }
商品模块最外层的布局是一个自定义的ViewGroup名为SlideDetailsLayout
SlideDetailsLayout内容有两个View, mFrontView(***个View)和mBehindView(第二个View)
有两种状态, 状态设置为close就显示***个商品数据View, open状态就显示第二个图文详情View
@SuppressWarnings("unused") public class SlideDetailsLayout extends ViewGroup {      /**      * Callback for panel OPEN-CLOSE status changed.      */     public interface OnSlideDetailsListener {         /**          * Called after status changed.          *          * @param status {@link Status}          */         void onStatucChanged(Status status);     }      public enum Status {         /** Panel is closed */         CLOSE,         /** Panel is opened */         OPEN;          public static Status valueOf(int stats) {             if (0 == stats) {                 return CLOSE;             } else if (1 == stats) {                 return OPEN;             } else {                 return CLOSE;             }         }     }      private static final float DEFAULT_PERCENT = 0.2f;     private static final int DEFAULT_DURATION = 300;      private View mFrontView;     private View mBehindView;      private float mTouchSlop;     private float mInitMotionY;     private float mInitMotionX;       private View mTarget;     private float mSlideOffset;     private Status mStatus = Status.CLOSE;     private boolean isFirstShowBehindView = true;     private float mPercent = DEFAULT_PERCENT;     private long mDuration = DEFAULT_DURATION;     private int mDefaultPanel = 0;      private OnSlideDetailsListener mOnSlideDetailsListener;      public SlideDetailsLayout(Context context) {         this(context, null);     }      public SlideDetailsLayout(Context context, AttributeSet attrs) {         this(context, attrs, 0);     }      public SlideDetailsLayout(Context context, AttributeSet attrs, int defStyleAttr) {         super(context, attrs, defStyleAttr);          TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.SlideDetailsLayout, defStyleAttr, 0);         mPercent = a.getFloat(R.styleable.SlideDetailsLayout_percent, DEFAULT_PERCENT);         mDuration = a.getInt(R.styleable.SlideDetailsLayout_duration, DEFAULT_DURATION);         mDefaultPanel = a.getInt(R.styleable.SlideDetailsLayout_default_panel, 0);
"Android如何实现商品详情页功能"的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注网站，小编将为大家输出更多高质量的实用文章！