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<String> list = new ArrayList<String>();
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<String> 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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