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Android中ListView存在多个item样式怎么处理

发表于:2022-08-20 作者:安全数据网编辑
编辑最后更新 2022年08月20日,这篇文章主要为大家展示了"Android中ListView存在多个item样式怎么处理",内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下"Android中Lis

这篇文章主要为大家展示了"Android中ListView存在多个item样式怎么处理",内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下"Android中ListView存在多个item样式怎么处理"这篇文章吧。

在项目开发的时候,相信大家可能会遇到一个ListView中出现多个不同的布局,遇到这个问题我的大致思路就是创建多个viewholder,在getViewType的时候设置不同位置的item用不同的viewholder,代码:

package com.sunny.youdao;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.CheckBox;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;public class MyAdapter extends BaseAdapter {        private Context mContext;        private LinearLayout linearLayout = null;        private LayoutInflater inflater;        private List list = new ArrayList();        private TextView tex;        private final int VIEW_TYPE = 3;        private final int TYPE_1 = 0;        private final int TYPE_2 = 1;        private final int TYPE_3 = 2;        public MyAdapter(Context context, List list) {                // TODO Auto-generated constructor stub                this.mContext = context;                this.list = list;                inflater = LayoutInflater.from(mContext);        }        @Override        public int getCount() {                // TODO 自动生成的方法存根                return list.size();        }        @Override        public Object getItem(int position) {                // TODO 自动生成的方法存根                return list.get(position);        }        @Override        public long getItemId(int position) {                // TODO 自动生成的方法存根                return position;        }                //每个convert view都会调用此方法,获得当前所需要的view样式    @Override    public int getItemViewType(int position) {        // TODO Auto-generated method stub        int viewtype = position%6;        if(viewtype == 0)        return TYPE_1;        else if(viewtype < 3)            return TYPE_2;        else if(viewtype < 6)            return TYPE_3;        else            return TYPE_1;    }        //返回样式的数量    @Override    public int getViewTypeCount() {        // TODO Auto-generated method stub        return 3;    }        @Override        public View getView(int position, View convertView, ViewGroup parent) {                viewHolder1 holder1 = null;                viewHolder2 holder2 = null;                viewHolder3 holder3 = null;                int type = getItemViewType(position);                // 无convertView,需要new出各个控件                if (convertView == null) {                        Log.e("convertView = ", "###convertView为空###");                        // 按当前所需的样式,确定new的布局                        switch (type) {                        case TYPE_1:                                convertView = inflater.inflate(R.layout.listitem1, parent,false);                                holder1 = new viewHolder1();                                holder1.textView = (TextView) convertView.findViewById(R.id.textview1);                                holder1.checkBox = (CheckBox) convertView.findViewById(R.id.checkbox);                                Log.e("convertView = ", "布局样式一");                                convertView.setTag(holder1);                                break;                        case TYPE_2:                                convertView = inflater.inflate(R.layout.listitem2, parent,false);                                holder2 = new viewHolder2();                                holder2.textView = (TextView) convertView.findViewById(R.id.textview2);                                Log.e("convertView = ", "布局样式二");                                convertView.setTag(holder2);                                break;                        case TYPE_3:                                convertView = inflater.inflate(R.layout.listitem3, parent,false);                                holder3 = new viewHolder3();                                holder3.textView = (TextView) convertView.findViewById(R.id.textview3);                                holder3.p_w_picpathView = (ImageView) convertView.findViewById(R.id.p_w_picpathview);                                Log.e("convertView = ", "布局样式三");                                convertView.setTag(holder3);                                break;                        }                } else {                        // 有convertView,按样式,取得不用的布局                        switch (type) {                        case TYPE_1:                                holder1 = (viewHolder1) convertView.getTag();                                Log.e("convertView= ", "布局样式一");                                break;                        case TYPE_2:                                holder2 = (viewHolder2) convertView.getTag();                                Log.e("convertView= ", "布局样式二");                                break;                        case TYPE_3:                                holder3 = (viewHolder3) convertView.getTag();                                Log.e("convertView= ", "布局样式三");                                break;                        }                }                // 设置资源                switch (type) {                case TYPE_1:                        holder1.textView.setText(Integer.toString(position));                        holder1.checkBox.setChecked(true);                        break;                case TYPE_2:                        holder2.textView.setText(Integer.toString(position));                        break;                case TYPE_3:                        holder3.textView.setText(Integer.toString(position));                        holder3.p_w_picpathView.setBackgroundResource(R.drawable.icon);                        break;                }                return convertView;        }                // 各个布局的控件资源        class viewHolder1 {                CheckBox checkBox;                TextView textView;        }        class viewHolder2 {                TextView textView;        }        class viewHolder3 {                ImageView p_w_picpathView;                TextView textView;        }}

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