listview设置不同选项的点击效果

最新推荐文章于 2020-04-30 15:50:50 发布

echome33

最新推荐文章于 2020-04-30 15:50:50 发布

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分类专栏： Android

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本文介绍了一种基于Android平台自定义SimpleAdapter的方法，通过继承BaseAdapter并覆盖关键方法实现列表视图的数据绑定。同时，文章详细展示了如何根据不同状态改变列表项背景。

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public class MySimpleAdapter extends BaseAdapter {
    private LayoutInflater mInflater;

    private List<HashMap<String, Object>> dataList;

    public MySimpleAdapter(Context context, List<HashMap<String, Object>> data) {
        mInflater = LayoutInflater.from(context);
        this.dataList = data;
    }

    @Override
    public int getCount() {
        return dataList.size();
    }

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

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.color_list_item, null);
            holder = new ViewHolder();
            holder.blue = (TextView)convertView.findViewById(R.id.blue_item);
            holder.red = (TextView)convertView.findViewById(R.id.red_item);
            holder.green = (TextView)convertView.findViewById(R.id.green_item);
            holder.yellow = (TextView)convertView.findViewById(R.id.yellow_item);

            convertView.setTag(holder);

        } else {
            holder = (ViewHolder)convertView.getTag();

        }
        holder.blue.setText((CharSequence)dataList.get(position).get("blue"));
        holder.red.setText((CharSequence)dataList.get(position).get("red"));
        holder.green.setText((CharSequence)dataList.get(position).get("green"));
        holder.yellow.setText((CharSequence)dataList.get(position).get("yellow"));
        if ("blue".equals(dataList.get(position).get("status").toString())) {
            convertView.setBackgroundResource(R.drawable.item_chang_blue);
        } else if ("red".equals(dataList.get(position).get("status").toString())) {
            convertView.setBackgroundResource(R.drawable.item_chang_red);
        } else if ("green".equals(dataList.get(position).get("status").toString())) {
            convertView.setBackgroundResource(R.drawable.flightinfo_item_chang_green);
        } else if ("yellow".equals(dataList.get(position).get("status").toString())) {
            convertView.setBackgroundResource(R.drawable.flightinfo_item_chang_yellow);
        } 
        return convertView;
    }

    @Override
    public void notifyDataSetChanged() {
        super.notifyDataSetChanged();
    }

    class ViewHolder {
        TextView blue;
        TextView red;
        TextView green;
        TextView yellow;
    }
    
}

选择器item_chang_blue.xml 其他同理

<?xml version="1.0" encoding="utf-8"?>
<selector
  xmlns:android="http://schemas.android.com/apk/res/android">
   <item android:state_pressed="true">
        <shape> 
            <solid android:color="#6dcef9" />
        </shape> 
    </item>
    
    <item android:state_focused="true"> 
        <shape> 
            <solid android:color="#6dcef9" />
        </shape> 
    </item> 
  
</selector>