Android 带有节标题的自定义列表视图
新手问题 我有一个json文件,其中包含多个同名类别 比如说Android 带有节标题的自定义列表视图,android,android-listview,baseadapter,sections,Android,Android Listview,Baseadapter,Sections,新手问题 我有一个json文件,其中包含多个同名类别 比如说 {"long_description":"test", "short_description":"test", "category_name":"work", "id":1}, {"long_description":"test2", "short_description":"test2", "category_name":"work", "id":2}, {"long_description":"test", "sho
{"long_description":"test",
"short_description":"test",
"category_name":"work",
"id":1},
{"long_description":"test2",
"short_description":"test2",
"category_name":"work",
"id":2},
{"long_description":"test",
"short_description":"test",
"category_name":"home",
"id":3}
我的问题是如何创建带有节(类别名称)的列表视图我正在使用自定义适配器这是我的循环
try {
JSONObject responseObject = new JSONObject(response);
JSONObject itemsObject = responseObject.getJSONObject("items");
Iterator<?> keysIterator = itemsObject.keys();
while(keysIterator.hasNext()) {
String keyString = (String)keysIterator.next();
JSONObject coupon = couponsObject.getJSONObject(keyString);
Item item = new Item();
item.setLongDescription(item.getString("long_description"));
itemList.add(item);
}
} catch (Exception e) {
e.printStackTrace();
}
adapter.notifyDataSetChanged();
试试看{
JSONObject responseObject=新的JSONObject(响应);
JSONObject itemsObject=responseObject.getJSONObject(“项”);
迭代器keysIterator=itemsObject.keys();
while(keysIterator.hasNext()){
String keyString=(String)Key迭代器.next();
JSONObject优惠券=couponObject.getJSONObject(键串);
项目=新项目();
item.setLongDescription(item.getString(“long_description”);
项目列表。添加(项目);
}
}捕获(例外e){
e、 printStackTrace();
}
adapter.notifyDataSetChanged();
使用下面的链接,这是带有标题的listview的很好示例
在下面给出的代码中,只需使用标题和列表项更新数据,这个示例是最简单的
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#2F2F2F"
android:gravity="center_vertical" >
<TextView
android:id="@+id/textSeparator"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:padding="8dp"
android:text=""
android:textAllCaps="true"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#FFF"
android:textStyle="bold"
android:visibility="visible" />
</LinearLayout>
CustomAdapter.java
import java.util.ArrayList;
import java.util.TreeSet;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
class CustomAdapter extends BaseAdapter {
private static final int TYPE_ITEM = 0;
private static final int TYPE_SEPARATOR = 1;
private ArrayList<String> mData = new ArrayList<String>();
private TreeSet<Integer> sectionHeader = new TreeSet<Integer>();
private LayoutInflater mInflater;
public CustomAdapter(Context context) {
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void addItem(final String item) {
mData.add(item);
notifyDataSetChanged();
}
public void addSectionHeaderItem(final String item) {
mData.add(item);
sectionHeader.add(mData.size() - 1);
notifyDataSetChanged();
}
@Override
public int getItemViewType(int position) {
return sectionHeader.contains(position) ? TYPE_SEPARATOR : TYPE_ITEM;
}
@Override
public int getViewTypeCount() {
return 2;
}
@Override
public int getCount() {
return mData.size();
}
@Override
public String getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
int rowType = getItemViewType(position);
if (convertView == null) {
holder = new ViewHolder();
switch (rowType) {
case TYPE_ITEM:
convertView = mInflater.inflate(R.layout.snippet_item1, null);
holder.textView = (TextView) convertView.findViewById(R.id.text);
break;
case TYPE_SEPARATOR:
convertView = mInflater.inflate(R.layout.snippet_item2, null);
holder.textView = (TextView) convertView.findViewById(R.id.textSeparator);
break;
}
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.textView.setText(mData.get(position));
return convertView;
}
public static class ViewHolder {
public TextView textView;
}
}
import java.util.ArrayList;
导入java.util.TreeSet;
导入android.content.Context;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.BaseAdapter;
导入android.widget.TextView;
类CustomAdapter扩展了BaseAdapter{
私有静态最终整数类型\u项=0;
私有静态final int TYPE_SEPARATOR=1;
private ArrayList mData=new ArrayList();
私有树集sectionHeader=新树集();
私人停车场;
公共CustomAdapter(上下文){
mInflater=(LayoutInflater)上下文
.getSystemService(上下文布局\充气机\服务);
}
公共无效附加项(最终字符串项){
mData.add(项目);
notifyDataSetChanged();
}
公共void addSectionHeaderItem(最终字符串项){
mData.add(项目);
sectionHeader.add(mData.size()-1);
notifyDataSetChanged();
}
@凌驾
public int getItemViewType(int位置){
返回段标题。包含(位置)?类型分隔符:类型项目;
}
@凌驾
public int getViewTypeCount(){
返回2;
}
@凌驾
public int getCount(){
返回mData.size();
}
@凌驾
公共字符串getItem(int位置){
返回mData.get(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
公共视图getView(int位置、视图转换视图、视图组父视图){
ViewHolder=null;
int rowType=getItemViewType(位置);
if(convertView==null){
holder=新的ViewHolder();
开关(行类型){
案例类型\u项目:
convertView=mInflater.inflate(R.layout.snippet_item1,null);
holder.textView=(textView)convertView.findViewById(R.id.text);
打破
箱型分离器:
convertView=mInflater.inflate(R.layout.snippet_item2,null);
holder.textView=(textView)convertView.findViewById(R.id.textSeparator);
打破
}
convertView.setTag(支架);
}否则{
holder=(ViewHolder)convertView.getTag();
}
holder.textView.setText(mData.get(position));
返回视图;
}
公共静态类视图持有者{
公共文本视图文本视图;
}
}
SectionListView.java
import android.app.ListActivity;
import android.os.Bundle;
public class SectionListView extends ListActivity {
private CustomAdapter mAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAdapter = new CustomAdapter(this);
for (int i = 1; i < 30; i++) {
mAdapter.addItem("Row Item #" + i);
if (i % 4 == 0) {
mAdapter.addSectionHeaderItem("Section #" + i);
}
}
setListAdapter(mAdapter);
}
}
导入android.app.ListActivity;
导入android.os.Bundle;
公共类SectionListView扩展了ListActivity{
私人定制适配器;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
mAdapter=新的CustomAdapter(此);
对于(int i=1;i<30;i++){
mAdapter.addItem(“行项目#”+i);
如果(i%4==0){
mAdapter.addSectionHeaderItem(“第#“+i节”);
}
}
setListAdapter(mAdapter);
}
}
您可以发布xml和适配器代码吗?我使用以下示例处理硬编码数据很简单,我想用服务器端数据执行此操作。您使用的是良好的链接,只需分离标题和列表项即可轻松实现。这对硬编码数据很好,我不希望看到上面的json,因此必须基于数据进行分离基于类别id或类别名称?基于类别名称