Created
April 8, 2013 15:49
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Sectioned Adapter
Working version of http://blogingtutorials.blogspot.co.uk/2010/11/android-listview-header-two-or-more-in.html
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package com.example.SectionedAdapterTest; | |
import android.view.View; | |
import android.view.ViewGroup; | |
import android.widget.Adapter; | |
import android.widget.BaseAdapter; | |
import java.util.ArrayList; | |
import java.util.List; | |
abstract public class SectionedAdapter extends BaseAdapter { | |
abstract protected View getHeaderView(String caption, int index, View convertView, ViewGroup parent); | |
private List<Section> sections = new ArrayList<Section>(); | |
private static int TYPE_SECTION_HEADER = 1; | |
public SectionedAdapter() { | |
super(); | |
} | |
public void addSection(String caption, Adapter adapter) { | |
sections.add(new Section(caption, adapter)); | |
} | |
public Object getItem(int position) { | |
for (Section section : this.sections) { | |
if (position == 0) { | |
return (section); | |
} | |
int size = section.adapter.getCount() + 1; | |
if (position < size) { | |
return (section.adapter.getItem(position - 1)); | |
} | |
position -= size; | |
} | |
return (null); | |
} | |
public int getCount() { | |
int total = 0; | |
for (Section section : this.sections) { | |
total += section.adapter.getCount() + 1; // add one for header | |
} | |
return (total); | |
} | |
public int getViewTypeCount() { | |
int total = 1; // one for the header, plus those from sections | |
for (Section section : this.sections) { | |
total += section.adapter.getViewTypeCount(); | |
} | |
return (total); | |
} | |
public int getItemViewType(int position) { | |
int typeOffset = TYPE_SECTION_HEADER + 1; // start counting from here | |
for (Section section : this.sections) { | |
if (position == 0) { | |
return (TYPE_SECTION_HEADER); | |
} | |
int size = section.adapter.getCount() + 1; | |
if (position < size) { | |
return (typeOffset + section.adapter.getItemViewType(position - 1)); | |
} | |
position -= size; | |
typeOffset += section.adapter.getViewTypeCount(); | |
} | |
return (-1); | |
} | |
public boolean areAllItemsSelectable() { | |
return (false); | |
} | |
public boolean isEnabled(int position) { | |
return (getItemViewType(position) != TYPE_SECTION_HEADER); | |
} | |
@Override | |
public View getView(int position, View convertView, ViewGroup parent) { | |
int sectionIndex = 0; | |
for (Section section : this.sections) { | |
if (position == 0) { | |
return (getHeaderView(section.caption, sectionIndex, | |
convertView, parent)); | |
} | |
int size = section.adapter.getCount() + 1; | |
if (position < size) { | |
return (section.adapter.getView(position - 1, convertView, | |
parent)); | |
} | |
position -= size; | |
sectionIndex++; | |
} | |
return (null); | |
} | |
@Override | |
public long getItemId(int position) { | |
return (position); | |
} | |
class Section { | |
String caption; | |
Adapter adapter; | |
Section(String caption, Adapter adapter) { | |
this.caption = caption; | |
this.adapter = adapter; | |
} | |
} | |
} |
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package com.example.SectionedAdapterTest; | |
import android.app.ListActivity; | |
import android.os.Bundle; | |
import android.view.View; | |
import android.view.ViewGroup; | |
import android.widget.ArrayAdapter; | |
import android.widget.TextView; | |
public class SectionedDemo extends ListActivity { | |
private static String[] items = { "US", "UK", "CANADA", "JAPAN", "SINGAPORE","INDIA", "CHINA" }; | |
private static String[] Sect = { "GOOGLE", "FACEBOOK","DELL" }; | |
private static String[] Doc = { "FRONT", "TOP","BACK" }; | |
@Override | |
public void onCreate(Bundle icicle) { | |
super.onCreate(icicle); | |
setContentView(R.layout.main); | |
adapter.addSection("step 1", new ArrayAdapter(this, android.R.layout.simple_list_item_1, items)); | |
adapter.addSection("Step 2", new ArrayAdapter(this, android.R.layout.simple_list_item_1, Sect)); | |
adapter.addSection("Step 3", new ArrayAdapter(this, android.R.layout.simple_list_item_1, Doc)); | |
setListAdapter(adapter); | |
} | |
SectionedAdapter adapter = new SectionedAdapter() { | |
protected View getHeaderView(String caption, int index, View convertView, ViewGroup parent) { | |
TextView result = (TextView) convertView; | |
if (convertView == null) { | |
result = (TextView) getLayoutInflater().inflate(R.layout.header, null); | |
} | |
result.setText(caption); | |
return (result); | |
} | |
}; | |
} |
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