android常见手动和自动轮播图效果

本文实例为大家分享了android手动和自动轮播图效果的具体代码，供大家参考，具体内容如下

1、准备好需要的轮播图片，图片标题（初始化，声明）。

  private int[] imageIds=new int[]{
      R.drawable.ic_launcher,
      R.drawable.simple_player_control_focused_holo,
      R.drawable.dot_player1_1,
      R.drawable.jt5,
  };
  
  private String[] titles=new String[]{
      "我是一",
      "我是二",
      "我是三",
      "我是四",
  };

2、在你要轮播的布局里面加入下面的布局(相当于加入一个控件，看你想放哪里).

3、把图片和标题都设置控件里面。

 
    images = new ArrayList();
    for(int i=0;i();
    dots.add(view.findViewById(R.id.dot_0));
    dots.add(view.findViewById(R.id.dot_1));
    dots.add(view.findViewById(R.id.dot_2));
    dots.add(view.findViewById(R.id.dot_3));
    
    title = (TextView) view.findViewById(R.id.title);
    title.setText(titles[0]);

4、findViewById到控件布局里面的ViewPager，new 一个ViewpagerAdapter（），通过setOnPageChangeListener的方法来监听改变

viewPager = (ViewPager) view.findViewById(R.id.viewPager);
    adapter = new ViewPagerAdapter();
    viewPager.setAdapter(adapter);
    viewPager.setonPageChangeListener(new ViewPager.onPageChangeListener() {
      @Override
      public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 title.setText(titles[position]);
 
 dots.get(position).setBackgroundResource(R.drawable.dot_focused);
 dots.get(oldPosition).setBackgroundResource(R.drawable.dot_normal);
 
 oldPosition = position;
 currentItem = position;
      }
 
      @Override
      public void onPageSelected(int position) {
 
      }
 
      @Override
      public void onPageScrollStateChanged(int state) {
 
      }
    });

5、自定义一个ViewPagerAdapter

 
  private class ViewPagerAdapter extends PagerAdapter {
 
    @Override
    public int getCount() {
      return images.size();//传入的数据
    }
 
    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
      return arg0 == arg1;
    }
 
    @Override
    public void destroyItem(ViewGroup view, int position, Object object) {
      // TODO Auto-generated method stub
//     super.destroyItem(container, position, object);
//     view.removeView(view.getChildAt(position));
//     view.removeViewAt(position);
      view.removeView(images.get(position));
    }
 
    @Override
    public Object instantiateItem(ViewGroup view, int position) {
      // TODO Auto-generated method stub
      view.addView(images.get(position));
      return images.get(position);
    }
 
}

6、这些自己看着改主要是线程池，handler，定时轮换

 
  private class ViewPageTask implements Runnable{
 
    @Override
    public void run() {
      currentItem = (currentItem + 1) % imageIds.length;
      mHandler.sendEmptyMessage(0);
    }
  }
 
  
  private Handler mHandler = new Handler(){
    public void handleMessage(android.os.Message msg) {
      viewPager.setCurrentItem(currentItem);
    };
  };
  @Override
  public void onStop() {
    // TODO Auto-generated method stub
    super.onStop();
    if(scheduledExecutorService != null){
      scheduledExecutorService.shutdown();
      scheduledExecutorService = null;
    }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。