多条目

来源：互联网发布：粒子滤波算法流程图编辑：程序博客网时间：2024/05/03 05:54
第一种，多条目，在优化 BaseAdapter 里面写
在它  public View getView(int position, View view, ViewGroup parent) {}；上面写//多条目@Overridepublic int getViewTypeCount() {    return 2;}@Overridepublic int getItemViewType(int position) {    return position % 2;}第二种   多条目一，item布局<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:orientation="horizontal"    android:layout_height="match_parent">    <ImageView        android:id="@+id/iv"        android:layout_width="150dp"        android:layout_height="100dp" />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical">        <TextView            android:id="@+id/tv_title"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:textSize="16sp" />    </LinearLayout></LinearLayout>二，item1布局<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical" android:layout_width="match_parent"    android:layout_height="match_parent">    <TextView        android:id="@+id/tv_title"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="16sp" /></LinearLayout>三，在优化中写多条目class MyAdapter extends BaseAdapter {    @Override    public int getCount() {        return list1.size();    }    @Override    public Object getItem(int position) {        return list1.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    //控制有几种子布局    @Override    public int getViewTypeCount() {        return 2;    }    @Override    public int getItemViewType(int position) {        if (position%2 == 0){            return 0;        }else {            return 1;        }    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder holder = null;        ViewHolder1 holder1 = null;        int type = getItemViewType(position);        if (type == 0){            if (convertView == null) {                holder = new ViewHolder();                convertView = View.inflate(MainActivity.this, R.layout.item, null);                holder.imageView = convertView.findViewById(R.id.iv);                holder.textView01 = convertView.findViewById(R.id.tv_title);                convertView.setTag(holder);            } else {                holder = (ViewHolder) convertView.getTag();            }            holder.textView01.setText(list1.get(position).getTitle());            ImageLoader.getInstance().displayImage(list1.get(position).getPicUrl(),holder.imageView);        }else {            if (convertView == null){                holder1 = new ViewHolder1();                convertView = View.inflate(MainActivity.this,R.layout.item1,null);                holder1.textView01 = convertView.findViewById(R.id.tv_title);                convertView.setTag(holder1);            }else {                holder1 = (ViewHolder1) convertView.getTag();            }            holder1.textView01.setText(list1.get(position).getTitle());        }        return convertView;    }}class ViewHolder {    ImageView imageView;    TextView textView01;}class ViewHolder1 {    TextView textView01;}
阅读全文
0 0