viewpager+gridview gridview中的个数不确定

    项目中需要一个横向滑动的分类展示，分类的个数不确定，从服务器获取后根据实际情况动态的加载viewpager的页数，找到一个demo，这边记录一下：

public class MainActivity extends Activity {
	private LinearLayout linear01;
	private LinearLayout linear02;
	private List<Map<String,Object>> listView;
	private int next = 0;
	private ViewPager adViewPager;
	private AdPageAdapter adapter;
	private ImageView[] imageViews;
	private ImageView imageView;  
	private AtomicInteger atomicInteger = new AtomicInteger(0);
	private boolean isContinue = true; 
	private List<View> gridViewlist = new ArrayList<View>();
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initView();
	}
	private void initView() {
		System.out.println("initView()");
		linear01 = (LinearLayout)findViewById(R.id.view_pager_content);
		linear02 = (LinearLayout)findViewById(R.id.viewGroup);
		listView = new ArrayList<Map<String,Object>>();
		//创建ViewPager
    	adViewPager = new ViewPager(this);
    	
    	//获取屏幕像素相关信息
    	DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
    	
        //根据屏幕信息设置ViewPager广告容器的宽高
        adViewPager.setLayoutParams(new LayoutParams(dm.widthPixels, dm.heightPixels));
        
        //将ViewPager容器设置到布局文件父容器中
        linear01.addView(adViewPager);
    	
        getView();
    	
    	initCirclePoint();
    	
    	adViewPager.setAdapter(adapter);
    	adViewPager.setOnPageChangeListener(new AdPageChangeListener());
    	
	}
 
    } 
	/**
	 *	ViewPager 页面改变监听器 
	 */
    private final class AdPageChangeListener implements OnPageChangeListener {  
    	
    	/**
    	 * 页面滚动状态发生改变的时候触发
    	 */
        @Override  
        public void onPageScrollStateChanged(int arg0) {  
        }  
  
        /**
         * 页面滚动的时候触发
         */
        @Override  
        public void onPageScrolled(int arg0, float arg1, int arg2) {  
        }  
  
        /**
         * 页面选中的时候触发
         */
        @Override  
        public void onPageSelected(int arg0) {  
        	//获取当前显示的页面是哪个页面
        	System.out.println("onPageSelected");
            atomicInteger.getAndSet(arg0);  
            //重新设置原点布局集合
            for (int i = 0; i < imageViews.length; i++) {  
                imageViews[arg0].setBackgroundResource(R.drawable.point_focused);  
                if (arg0 != i) {  
                    imageViews[i].setBackgroundResource(R.drawable.point_unfocused);  
                }  
            }  
        }  
    } 
	private void initCirclePoint(){
		System.out.println("initCirclePoint()");
        imageViews = new ImageView[gridViewlist.size()];  
        //广告栏的小圆点图标
        for (int i = 0; i < gridViewlist.size(); i++) {  
        	//创建一个ImageView, 并设置宽高. 将该对象放入到数组中
        	imageView = new ImageView(this);
        	LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.FILL_PARENT);  
    		layoutParams.setMargins(10,0, 10, 0);  
            imageView.setLayoutParams(layoutParams); 
            imageViews[i] = imageView;  
            
            //初始值, 默认第0个选中
            if (i == 0) {  
                imageViews[i].setBackgroundResource(R.drawable.point_focused);  
            } else {  
                imageViews[i].setBackgroundResource(R.drawable.point_unfocused);  
            } 
            //将小圆点放入到布局中
            linear02.addView(imageViews[i]); 

        } 
	}
	private void getView() {
		
		int[] intView = {R.drawable.one,R.drawable.two,R.drawable.three,R.drawable.four,R.drawable.five,R.drawable.six,R.drawable.seven,R.drawable.eight,R.drawable.nine,R.drawable.ten
				,R.drawable.eleven,R.drawable.twelve,R.drawable.thirteen,R.drawable.fourteen,R.drawable.fifteen,R.drawable. sixteen,R.drawable.seventeen};
		for (int i = 0; i < intView.length; i++) {
			Map<String,Object> mapView = new HashMap<String, Object>();
			mapView.put("image", intView[i]);
			listView.add(mapView);
		}
		getGridView();
	}
	private void getGridView() {
		System.out.println("getGridView"+listView.size());
		boolean bool = true;
		while (bool) {
			int result = next+16;
			System.out.println("result"+result);
			if(listView.size() != 0&&result<listView.size()) {
				System.out.println("result+kkkkkkkkkk"+result);
				GridView gridView = new GridView(this);
				gridView.setNumColumns(4);
				List<Map<String,Object>> gridlist = new ArrayList<Map<String,Object>>();
				for (int i = next; i < result; i++) {
					gridlist.add(listView.get(i));
					
				}
				MyAdapter myAdapter = new MyAdapter(gridlist);
				gridView.setAdapter(myAdapter);
				next = result;
				gridViewlist.add(gridView);
				
			}else if(result-listView.size()<=16){
				System.out.println("剩余多少"+(result-listView.size()));
				List<Map<String,Object>> gridlist = new ArrayList<Map<String,Object>>();
				for (int i = next; i < listView.size(); i++) {
					gridlist.add(listView.get(i));
				}
				GridView gridView = new GridView(this);
				gridView.setNumColumns(4);
				MyAdapter myAdapter = new MyAdapter(gridlist);
				gridView.setAdapter(myAdapter);
				next = listView.size()-1;
				gridViewlist.add(gridView);
				bool = false;
			}else {
				System.out.println("执行了这这句话");
				bool = false;
			}
		}
		adapter = new AdPageAdapter(gridViewlist);
	}
	private final class AdPageAdapter extends PagerAdapter {  
        private List<View> views = null;  
  
        /**
         * 初始化数据源, 即View数组
         */
        public AdPageAdapter(List<View> views) {  
            this.views = views;  
        }  
        
        /**
         * 从ViewPager中删除集合中对应索引的View对象
         */
        @Override  
        public void destroyItem(View container, int position, Object object) {  
            ((ViewPager) container).removeView(views.get(position));  
        }  
  
        /**
         * 获取ViewPager的个数
         */
        @Override  
        public int getCount() {  
            return views.size();  
        }  
  
        /**
         * 从View集合中获取对应索引的元素, 并添加到ViewPager中
         */
        @Override  
        public Object instantiateItem(View container, final int position) {  
            ((ViewPager) container).addView(views.get(position), 0);  
//            views.get(position).setOnClickListener(new OnClickListener() {
//				
//				@Override
//				public void onClick(View v) {
//					System.out.println("position"+position);
//					Intent intent=new Intent(MainActivity.this,OtherViewPage.class);
//					MainActivity.this.startActivity(intent);
//				}
//			});
            return views.get(position);  
        }  
  
        /**
         * 是否将显示的ViewPager页面与instantiateItem返回的对象进行关联
         * 这个方法是必须实现的
         */
        @Override  
        public boolean isViewFromObject(View view, Object object) {  
            return view == object;  
        }  
    }
	private class MyAdapter extends BaseAdapter{
		List<Map<String,Object>> listgrid;
		private MyAdapter(List<Map<String,Object>> listgrid ) {
			this.listgrid = listgrid;
		}
		@Override
		public int getCount() {
			return listgrid.size();
		}

		@Override
		public Object getItem(int position) {
			return listgrid.get(position);
		}

		@Override
		public long getItemId(int position) {
			return position;
		}
		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			convertView = getLayoutInflater().inflate(R.layout.grid_view_item, null);
			ImageView getViewLinear = (ImageView)convertView.findViewById(R.id.getViewLinear);
			getViewLinear.setBackgroundResource(Integer.parseInt(listgrid.get(position).get("image").toString()));
			return convertView;
		}
		
	}
}

他这边是把adapter都写在了一起，比较简练，实际使用中可以分开。布局就是两个LinearLayout 。重点是getGridView()方法中的逻辑，通过一个中间的list将总共的数据分离出来，通过比较size循环判断进行添加viewpager的页数。

demo源码