Android中如何实现多行、水平滚动的分页的Gridview？

功能要求：

(1)比如每页显示2X2，总共2XN，每个item显示图片+文字（点击有链接）。

如果单行水平滚动，可以用Horizontalscrollview实现。

如果是多行水平滚动，则结合Gridview（一般是垂直滚动的）和Horizontalscrollview实现。

(2)水平滚动翻页，下面有显示当前页的icon。

1. 实现自定义的HorizontalScrollView（HorizontalScrollView.java）：

因为要翻页时需要传当前页给调用者，所以fling函数中自己实现而不要调用父类的fling。

[java] public class DrawerHScrollView extends HorizontalScrollView {
    private static final String TAG = "DrawerHScrollView";

    private IDrawerPresenter drawerPresenter = null;
    private int currentPage = 0;
    private int totalPages = 1;
    private static Hashtable<Integer, Integer> positionLeftTopOfPages = new Hashtable();

    public DrawerHScrollView(Context context) {
        super(context);
    }

    public DrawerHScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public DrawerHScrollView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public void cleanup(){
        currentPage = 0;
        totalPages = 1;
        drawerPresenter = null;
        if(positionLeftTopOfPages != null){
            positionLeftTopOfPages.clear();
        }
    }

    public void setParameters(int totalPages, int currentPage, int scrollDisX) {
        Log.d(TAG, "~~~~~setParameters totalPages:"+totalPages +",currentPage:"+ currentPage +",scrollDisX:"+scrollDisX);
        this.totalPages = totalPages;
        this.currentPage = currentPage;
        positionLeftTopOfPages.clear();
        for (int i = 0;i<totalPages;i++){
            int posx = (scrollDisX) * i;
            positionLeftTopOfPages.put(i, posx);
            Log.d(TAG, "~~~~~setParameters i:"+i +",posx:"+posx);
        }
        smoothScrollTo(0, 0);
    }

    public void setPresenter(IDrawerPresenter drawerPresenter ) {
        this.drawerPresenter = drawerPresenter;
    }

    @Override
    public void fling(int velocityX) {
        Log.v(TAG, "-->fling velocityX:"+velocityX);
        boolean change_flag = false;
        if (velocityX > 0 && (currentPage < totalPages - 1)){
            currentPage++;
            change_flag = true;
        } else if (velocityX < 0 && (currentPage > 0)){
            currentPage--;
            change_flag = true;
        }
        if (change_flag){
            int postionTo = (Integer)positionLeftTopOfPages.get(new Integer(currentPage)).intValue();
            Log.v(TAG, "------smoothScrollTo posx:"+postionTo);
            smoothScrollTo(postionTo, 0);
            drawerPresenter.dispatchEvent(totalPages, currentPage);
        }
        //super.fling(velocityX);
    }
}

public class DrawerHScrollView extends HorizontalScrollView {
private static final String TAG = "DrawerHScrollView";

private IDrawerPresenter drawerPresenter = null;
private int currentPage = 0;
private int totalPages = 1;
private static Hashtable<Integer, Integer> positionLeftTopOfPages = new Hashtable();

public DrawerHScrollView(Context context) {
super(context);
}

public DrawerHScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}

public DrawerHScrollView(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
}

public void cleanup(){
  currentPage = 0;
  totalPages = 1;
  drawerPresenter = null;
  if(positionLeftTopOfPages != null){
   positionLeftTopOfPages.clear();
  }
}

public void setParameters(int totalPages, int currentPage, int scrollDisX) {
  Log.d(TAG, "~~~~~setParameters totalPages:"+totalPages +",currentPage:"+ currentPage +",scrollDisX:"+scrollDisX);
  this.totalPages = totalPages;
  this.currentPage = currentPage;
  positionLeftTopOfPages.clear();
  for (int i = 0;i<totalPages;i++){
   int posx = (scrollDisX) * i;
   positionLeftTopOfPages.put(i, posx);
   Log.d(TAG, "~~~~~setParameters i:"+i +",posx:"+posx);
  }
  smoothScrollTo(0, 0);
}

public void setPresenter(IDrawerPresenter drawerPresenter ) {
  this.drawerPresenter = drawerPresenter;
}

@Override
public void fling(int velocityX) {
  Log.v(TAG, "-->fling velocityX:"+velocityX);
  boolean change_flag = false;
  if (velocityX > 0 && (currentPage < totalPages - 1)){
   currentPage++;补充：移动开发 , Android ,