How To Add Section Header In ListView List Item

I want to Develop 'History of Country' Android Application. But I have a problem. I can not put Country Header in Listview List Item. I want to put Header; Such as 'Africa : North

Solution 1:

Screen Shot

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/edtSearch"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_vertical"
        android:hint="Search..."
        android:padding="10dp" />

    <ListView
        android:id="@+id/lvCountry"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>

</LinearLayout>

layout_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/tvItemTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:text="Item" />

</LinearLayout>

layout_section.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#D8D8D8"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/tvSectionTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:padding="10dp"
        android:text="Section"
        android:textStyle="bold" />

</LinearLayout>

MainActivity.java

public class MainActivity extends ActionBarActivity {

    private ListView lvCountry;
    private EditText edtSearch;

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

        edtSearch = (EditText) findViewById(R.id.edtSearch);
        lvCountry = (ListView) findViewById(R.id.lvCountry);

        ArrayList<Item> countryList = new ArrayList<MainActivity.Item>();
        // Header
        countryList.add(new SectionItem("Asia"));
        // State Name
        countryList.add(new EntryItem("India"));
        countryList.add(new EntryItem("China"));
        countryList.add(new EntryItem("Hong Kong"));
        countryList.add(new EntryItem("Nepal"));

        // Header
        countryList.add(new SectionItem("North Asia"));
        // State Name
        countryList.add(new EntryItem("Belarus"));
        countryList.add(new EntryItem("Moldova"));
        countryList.add(new EntryItem("Russian Federation"));
        countryList.add(new EntryItem("Ukraine"));

        // Header
        countryList.add(new SectionItem("North America"));
        // State Name
        countryList.add(new EntryItem("Canada"));
        countryList.add(new EntryItem("Saint Pierre and Miquelon"));
        countryList.add(new EntryItem("United States"));

        // Header
        countryList.add(new SectionItem("North & Central America"));
        // State Name
        countryList.add(new EntryItem("Caribbean Islands"));
        countryList.add(new EntryItem("Anguilla"));
        countryList.add(new EntryItem("Antigua and Barbuda"));
        countryList.add(new EntryItem("Aruba"));

        // set adapter
        final CountryAdapter adapter = new CountryAdapter(this, countryList);
        lvCountry.setAdapter(adapter);
        lvCountry.setTextFilterEnabled(true);

        // filter on text change
        edtSearch.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if(adapter != null)
                {
                    adapter.getFilter().filter(s.toString());
                }
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });
    }

    /**
     * row item
     */
    public interface Item {
        public boolean isSection();
        public String getTitle();
    }

    /**
     * Section Item
     */
    public class SectionItem implements Item {
        private final String title;

        public SectionItem(String title) {
            this.title = title;
        }

        public String getTitle() {
            return title;
        }

        @Override
        public boolean isSection() {
            return true;
        }
    }

    /**
     * Entry Item
     */
    public class EntryItem implements Item {
        public final String title;

        public EntryItem(String title) {
            this.title = title;
        }

        public String getTitle() {
            return title;
        }

        @Override
        public boolean isSection() {
            return false;
        }
    }

    /**
     * Adapter
     */
    public class CountryAdapter extends BaseAdapter {
        private Context context;
        private ArrayList<Item> item;
        private ArrayList<Item> originalItem;

        public CountryAdapter() {
            super();
        }

        public CountryAdapter(Context context, ArrayList<Item> item) {
            this.context = context;
            this.item = item;
            //this.originalItem = item;
        }

        @Override
        public int getCount() {
            return item.size();
        }

        @Override
        public Object getItem(int position) {
            return item.get(position);
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent)
        {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            if (item.get(position).isSection()) {
                // if section header
                convertView = inflater.inflate(R.layout.layout_section, parent, false);
                TextView tvSectionTitle = (TextView) convertView.findViewById(R.id.tvSectionTitle);
                tvSectionTitle.setText(((SectionItem) item.get(position)).getTitle());
            }
            else
            {
                // if item
                convertView = inflater.inflate(R.layout.layout_item, parent, false);
                TextView tvItemTitle = (TextView) convertView.findViewById(R.id.tvItemTitle);
                tvItemTitle.setText(((EntryItem) item.get(position)).getTitle());
            }

            return convertView;
        }

        /**
         * Filter
         */
        public Filter getFilter()
        {
            Filter filter = new Filter() {

                @SuppressWarnings("unchecked")
                @Override
                protected void publishResults(CharSequence constraint, FilterResults results) {

                    item = (ArrayList<Item>) results.values;
                    notifyDataSetChanged();
                }

                @SuppressWarnings("null")
                @Override
                protected FilterResults performFiltering(CharSequence constraint) {

                    FilterResults results = new FilterResults();
                    ArrayList<Item> filteredArrayList = new ArrayList<Item>();


                    if(originalItem == null || originalItem.size() == 0)
                    {
                        originalItem = new ArrayList<Item>(item);
                    }

                    /*
                     * if constraint is null then return original value
                     * else return filtered value
                     */
                    if(constraint == null && constraint.length() == 0)
                    {
                        results.count = originalItem.size();
                        results.values = originalItem;
                    }
                    else
                    {
                        constraint = constraint.toString().toLowerCase(Locale.ENGLISH);
                        for (int i = 0; i < originalItem.size(); i++) 
                        {
                            String title = originalItem.get(i).getTitle().toLowerCase(Locale.ENGLISH);
                            if(title.startsWith(constraint.toString()))
                            {
                                filteredArrayList.add(originalItem.get(i));
                            }
                        }
                        results.count = filteredArrayList.size();
                        results.values = filteredArrayList;
                    }

                    return results;
                }
            };

            return filter;
        }
    }

}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.sectionheader"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="11"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:windowSoftInputMode="stateHidden|adjustPan"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>