Android中轮播图的实现

xiaoxiao2021-02-27  457

在Android中想要实现轮播图,会用到ViewPager和其子控件PagerTabStrip(标题栏)

怎么样一步一步的去做到:

1.将View视图添加到集合中

public class MyActivity extends Activity{ ViewPager viewPager; View view_a,view_b,view_c; List<View> viewList; PagerTabStrip pts; ArrayList<String>arrayList_pts; Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity); pts = (PagerTabStrip) findViewById(R.id.pts); pts.setBackgroundColor(Color.parseColor("#FF8EFF")); pts.setTabIndicatorColor(Color.parseColor("#00FFFF")); viewPager = (ViewPager) findViewById(R.id.vp_activity); LayoutInflater inflater = LayoutInflater.from(this); viewList = new ArrayList<View>(); viewList.add(view_a); viewList.add(view_b); viewList.add(view_c); arrayList_pts = new ArrayList<>(); arrayList_pts.add("第一页"); arrayList_pts.add("第二页"); arrayList_pts.add("第三页"); view_a = inflater.inflate(R.layout.activity_one,null); view_b = inflater.inflate(R.layout.activity_two,null); view_c = inflater.inflate(R.layout.activity_three,null);

2.创建数据源Adapter,传入到集合,并且要实现其中的四个方法 

a. getCount() 获取数据源的大小 b. isViewFromObject() 判断当前的View是否是对对象返回 c. instantiateItem() 初始换页面  d. destroyItem() 销毁页面

PagerAdapter pagerAdapter = new PagerAdapter() { @Override public int getCount() { return viewList.size(); } @Override public boolean isViewFromObject(View view, Object object) { return view == object; } @Override public Object instantiateItem(ViewGroup container, int position) { container.addView(viewList.get(position)); return viewList.get(position); } @Override public void destroyItem(ViewGroup container, int position, Object object) {  container.removeView(viewList.get(position));   }

虽然很是粗糙,但是将就看看吧! 下面是具体的实现效果

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