Android-Listveiw的checkbox,Button焦点问题

    CheckBox抢占Item焦点，导致Item点击无效!方法一：CheckBox设置android:clickable="false" 方法二：在Item根布局或ListView布局设置android:descendantFocusability="blocksDescendants"在ListView的Item中的Button,CheckBox等子控件会抢占焦点,使得点击item本身没有响应！常用android:descendantFocusability=”blocksDescendants”覆盖子类控件焦点    descendantFocusability属性定义viewGroup和其子控件之间关系：    beforeDescendants：viewgroup会优先其子类控件而获取到焦点    afterDescendants：viewgroup只有当其子类控件不需要获取焦点时才获取焦点    blocksDescendants：viewgroup会覆盖子类控件而直接获得焦点

适配器在getview()中重复使用[被移除屏幕的item,即不可见的项]
会造成被选中的checkbox重新出现，显示异常，故需要记录checkbox的状态！

public class MyAdapter extends BaseAdapter implements OnItemClickListener {     private HashMap isSelected; // 记录checkbox状态    public MyAdapter() {                // 初始化所有checkbox为未选择          isSelected = new HashMap();          for (int i = 0; i < list.size(); i++)            isSelected.put(i, false);    }        @Override      public View getView(int position, View convertView, ViewGroup arg2) {                      ViewHolder holder;        ...        holder.cb.setChecked(isSelected.get(position)); // 更新checkbox状态        return view;    }      @Override      public void onItemClick(AdapterView<?> arg0, View view,              int position, long arg3) {        // 切换checkbox状态        isSelected.put(position, !isSelected.get(position));        notifyDataSetChanged();    }  }  public class MainActivity extends Activity {    ...    MyAdapter adp = new MyAdapter();    listview.setAdapter(adp);    listview.setOnItemClickListener(adp);    ...}

：http://www.jianshu.com/p/b2aa0485f7b8
CSDN博客: http://blog.csdn.net/qq_32115439/article/details/53710915
GitHub博客: http://lioil.win/2016/04/20/ListView-CheckBox.html
Coding博客: http://c.lioil.win/2016/04/20/ListView-CheckBox.html

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