Android通过实现GridView的横向滚动实现仿京东秒杀效果

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:orientation="vertical" >  <HorizontalScrollView    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:layout_margin="5dp" >    <LinearLayout      android:layout_width="wrap_content"      android:layout_height="fill_parent"      android:layout_margin="10dp" >      <GridView        android:id="@+id/home_grid"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:gravity="center"        android:numColumns="auto_fit"        android:stretchMode="spacingWidthUniform" >      </GridView>    </LinearLayout>  </HorizontalScrollView></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:id="@+id/item_homepage_hor_grid_item"  android:layout_width="match_parent"  android:layout_height="186dp"  android:orientation="vertical">  <LinearLayout    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@color/white"    android:gravity="center"    android:orientation="vertical"    >    <LinearLayout      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:gravity="center_horizontal"      android:orientation="vertical">      <ImageView        android:id="@+id/home_page_jrtj_img"        android:layout_width="125dp"        android:layout_height="125dp"        android:scaleType="fitXY"        android:src="@mipmap/home_jrtj_sp_1" />    </LinearLayout>    <TextView      android:paddingStart="@dimen/space_5dp"      android:id="@+id/home_page_jrtj_tv_title"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_gravity="center_horizontal"      android:layout_marginTop="@dimen/space_5dp"      android:ellipsize="end"      android:maxLines="2"      android:text="小米（MI）小米电视4A 标准版 55英寸 HDR 2GB+8GB 四核64位高性能处理器 4K超高清智能语音网络液晶平板电视（L55M5-AZ）"      android:textColor="#333333"      android:textSize="11sp" />    <LinearLayout      android:paddingStart="@dimen/space_5dp"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:gravity="center_vertical"      android:orientation="horizontal"      android:paddingBottom="@dimen/space_5dp"      android:paddingTop="@dimen/space_5dp">      <TextView        android:id="@+id/home_page_jrtj_tv_price"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:layout_weight="1"        android:ellipsize="end"        android:maxLines="1"        android:text="¥4998"        android:textColor="#f50000"        android:textSize="@dimen/font_size_15sp" />      <TextView        android:id="@+id/home_page_jrtj_tv_huajia"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginEnd="@dimen/space_10dp"        android:layout_marginStart="@dimen/space_5dp"        android:layout_marginTop="@dimen/space_2dp"        android:ellipsize="end"        android:maxLines="1"        android:text="¥ 4998"        android:textColor="#d2d2d2"        android:textSize="@dimen/font_size_11sp" />    </LinearLayout>  </LinearLayout></LinearLayout>

public class HomePageJrTjTwoBean {  private int img;  private String title;  private String old_price;  private String price;  public int getImg() {    return img;  }  public void setImg(int img) {    this.img = img;  }  public String getTitle() {    return title;  }  public void setTitle(String title) {    this.title = title;  }  public String getPrice() {    return price;  }  public void setPrice(String price) {    this.price = price;  }  public String getOld_price() {    return old_price;  }  public void setOld_price(String old_price) {    this.old_price = old_price;  }}

public class MainActivity extends Activity {  //横向GridView   @BindView(R.id.home_grid)  GridView home_grid;  // 数据源  private List<homePageJrTjTwoBean> relist = new ArrayList<>();  private CommonAdapters<homePageJrTjTwoBean> re_adapter = null;  private List<HomePageJrTjTwoBean> listData_two = new ArrayList<>();  private int[] jrtj_two = new int[]{R.mipmap.home_jrtj_sp_1, R.mipmap.home_jrtj_sp_2, R.mipmap.home_jrtj_sp_3, R.mipmap.home_jrtj_sp_3, R.mipmap.home_jrtj_sp_3};//今日特价横向数据  private String[] sp_name = new String[]{"老板（Roba1m）大吸力免 拆洗触控侧吸式...", "老板（Roba1m）大吸力免 拆洗触控侧吸式...", "老板（Roba1m）大吸力免 拆洗触控侧吸式...", "老板（Roba1m）大吸力免 拆洗触控侧吸式...", "老板（Roba1m）大吸力免 拆洗触控侧吸式..."};  private String[] price = new String[]{"¥5517", "¥5517", "¥5517", "¥5517", "¥5517"};  private String[] hua_price = new String[]{"¥8888", "¥8888", "¥8888", "¥8888", "¥8888"};  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    //自己造的假数据，实际开发中从后台获取，再去刷新Grid的适配器，调用 re_adapter.notifyDataSetChanged();     for (int i = 0; i < jrtj_two.length; i++) {      HomePageJrTjTwoBean homePageJrTjTwoBean = new HomePageJrTjTwoBean();      homePageJrTjTwoBean.setImg(jrtj_two[i]);      homePageJrTjTwoBean.setTitle(sp_name[i]);      homePageJrTjTwoBean.setPrice(price[i]);      homePageJrTjTwoBean.setOld_price(hua_price[i]);      listData_two.add(homePageJrTjTwoBean);    }    //初始化横向的GridView    initHorGridView();  }  private void initHorGridView() {    int listSize = relist.size();    int wm = TUtil.getScreenWidth(getActivity());    int itemWidth = DisplayUtil.dip2px(getActivity(), 120);    int horizontalSpacing = DisplayUtil.dip2px(getActivity(), 10);    int allWidth = (int) ((listSize) * (itemWidth + horizontalSpacing));    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(allWidth,      LinearLayout.LayoutParams.WRAP_CONTENT);    homepage_hor_grid.setLayoutParams(params);    homepage_hor_grid.setColumnWidth(itemWidth);    homepage_hor_grid.setNumColumns(listSize);    homepage_hor_grid.setHorizontalSpacing(1);    re_adapter = new CommonAdapters<QgitemBean>(getActivity(), relist, R.layout.item_homepage_hor_grid) {      @Override      public void convert(ViewHolders holder, QgitemBean datas) {       //商品图片      ImageView home_page_jrtj_img = holder.getView(R.id.home_page_jrtj_img);      //商品标题      TextView home_page_jrtj_tv_title = holder.getView(R.id.home_page_jrtj_tv_title);      //商品价格      TextView home_page_jrtj_tv_price = holder.getView(R.id.home_page_jrtj_tv_price);      //商品划价      TextView home_page_jrtj_tv_huajia = holder.getView(R.id.home_page_jrtj_tv_huajia);      home_page_jrtj_tv_huajia.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);//设置划价      home_page_jrtj_img.setImageResource(datas.getImg());      home_page_jrtj_tv_title.setText(datas.getTitle());      home_page_jrtj_tv_price.setText(datas.getPrice());      home_page_jrtj_tv_huajia.setText(datas.getOld_price());      }    };    home_grid.setAdapter(re_adapter);  }}

public abstract class CommonAdapters<T> extends BaseAdapter {  protected Context mContext;  protected List<T> mDatas;  protected LayoutInflater mInflater;  protected int layoutId;  private int mCurPosition = 0;  public int getCurPosition() {    return mCurPosition;  }  public void setCurPosition(int mCurPosition) {    this.mCurPosition = mCurPosition;  }  public CommonAdapters(Context context, List<T> datas, int layoutId)  {    this.mContext = context;    mInflater = LayoutInflater.from(context);    this.mDatas = datas;    this.layoutId = layoutId;  }  public CommonAdapters(Context mContext, T xx, int item_home_list_in) {    this.mContext = mContext;    mInflater = LayoutInflater.from(mContext);    this.mDatas = (List<T>) xx;    this.layoutId = item_home_list_in;  }  public void upDataList(List<T> datas)  {    if (null == datas)      return;    if (mDatas != datas) {      mDatas.clear();      mDatas.addAll(datas);    }    notifyDataSetChanged();  }  @Override  public int getCount()  {    if (null == mDatas)      return 0;    return mDatas.size();  }  @Override  public T getItem(int position)  {    return mDatas.get(position);  }  @Override  public long getItemId(int position)  {    return position;  }  @Override  public View getView(int position, View convertView, ViewGroup parent)  {    ViewHolders holder = ViewHolders.get(mContext, convertView, parent,        layoutId, position);    convert(holder, getItem(position));    return holder.getConvertView();  }  public abstract void convert(ViewHolders holder, T datas);}