自定义SectionAdapter显示数据

前言

实现效果

主要代码

package com.noyet.zzj.sectionadapterdemo;

import android.content.Context;
import android.util.SparseArray;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

/**
* package: com.noyet.zzj.sectionadapterdemo
* Created by noyet on 2015/12/9.
*/
public class SectionAdapter extends SectionBaseAdapter<SectionItem> {

public SectionAdapter(Context context, SparseArray<SectionItem> mSectionItems) {
super(context, mSectionItems);
}

@Override
public int getItemViewType(int position) {
int titlePos = 0;
for (int i = 0; i < mTypeCount; i++) {
SectionItem sectionItem = getItemSection(titlePos);
int size = sectionItem.getCount() + 1;

if (position < size) {
return position;
}
position -= size;
titlePos++;
}
return -1;
}

@Override
public int getViewTypeCount() {
return mTypeCount;
}

@Override
public int getCount() {
int total = 0;
for (int i = 0; i < mTypeCount; i++) {
total += getItemSection(i).getCount() + 1;
}
return total;
}

@Override
public Object getItem(int position) {
int titlePos = 0;
for (int i = 0; i < mTypeCount; i++) {

SectionItem sectionItem = getItemSection(titlePos);
int size = sectionItem.getCount() + 1;
if (position < size) {
return sectionItem;
}
position -= size;
titlePos++;
}
return null;
}

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
SectionItem item = (SectionItem) getItem(position);
int itemPos = getItemViewType(position);
ViewHolder holder;

if (itemPos == TYPE_SECTION_HEADER) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_title_section, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView.findViewById(R.id.text_title);
holder.imageView = (ImageView) convertView.findViewById(R.id.text_title_iv);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.imageView.setImageResource(android.R.drawable.ic_dialog_dialer);
holder.textView.setText(item.getTitle());
return convertView;
} else {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.item_content_section, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView.findViewById(R.id.text_content);
convertView.setTag(R.id.tag_data, holder);
} else {
holder = (ViewHolder) convertView.getTag(R.id.tag_data);
}
String content = item.getItem(itemPos - 1).toString();
holder.textView.setText(content);
convertView.setTag(R.id.tag_id, content);
convertView.setOnClickListener(listener);
return convertView;
}
}

private View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(mContext, (String) v.getTag(R.id.tag_id), Toast.LENGTH_SHORT).show();
}
};

static class ViewHolder {
TextView textView;
ImageView imageView;
}
}

package com.noyet.zzj.sectionadapterdemo;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.SparseArray;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

private SectionAdapter mAdapter;
private SparseArray<SectionItem> mSectionItems;
private List<String> list;
private ListView mListView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

mListView = (ListView) findViewById(R.id.list_view);

mSectionItems = new SparseArray<>();
list = new ArrayList<>();
list.add("like me 1");
list.add("like me 2");
list.add("like me 3");
for (int i = 0; i < 10; i++) {
SectionItem<String> sectionItem = new SectionItem<>(this, "title" + i, list);
mSectionItems.put(i, sectionItem);
}
mAdapter = new SectionAdapter(this, mSectionItems);
mListView.setAdapter(mAdapter);
}
}