Implement Horizontal ListView using android.widget.Gallery, with custom BaseAdapter.

Refer to the article Implement a photo bar using android.widget.Gallery, with custom BaseAdapter, and custom object. It can be modify to implement a Horizontal ListView, like this:



Modify the main java code to implement our custom BaseAdapter for Gallery.

package com.AnHorizontalListView;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.TextView;
import android.widget.Toast;

public class AnHorizontalListViewActivity extends Activity {
 
 Gallery myHorizontalListView;
 MyAdapter myAdapter;
 
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
      myHorizontalListView = (Gallery)findViewById(R.id.horizontallistview);
    
      myAdapter = new MyAdapter(this);
      myHorizontalListView.setAdapter(myAdapter);
    
      myHorizontalListView.setOnItemClickListener(new OnItemClickListener(){

   @Override
   public void onItemClick(AdapterView<?> parent, View view, int position,
     long id) {
    Toast.makeText(
      AnHorizontalListViewActivity.this,
      parent.getItemAtPosition(position).toString() + " Clicked",
      Toast.LENGTH_LONG)
      .show();
    
   }});
    
  }

  public class MyAdapter extends BaseAdapter {
   
   Context context;
   
   String[] itemsArray = {
     "SUN","MON", "TUS", "WED", "THU", "FRI", "SAT"};
   
   MyAdapter(Context c){
    context = c;
   }

  @Override
  public int getCount() {
   // TODO Auto-generated method stub
   return itemsArray.length;
  }

  @Override
  public Object getItem(int position) {
   // TODO Auto-generated method stub
   return itemsArray[position];
  }

  @Override
  public long getItemId(int position) {
   // TODO Auto-generated method stub
   return position;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
   // TODO Auto-generated method stub
   
   View rowView = LayoutInflater
     .from(parent.getContext())
     .inflate(R.layout.row, null);
   TextView listTextView = (TextView)rowView.findViewById(R.id.itemtext);
   listTextView.setText(itemsArray[position]);
   
   return rowView;
  }
  
  
  }
}

Create /res/layout/row.xml to define the layout of individual items in Gallery.

<?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="fill_parent"
  android:orientation="vertical" >

  <TextView
      android:id="@+id/itemtext"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_margin="20dp"
      android:textColor="@android:color/white"
      android:textStyle="bold"
      android:textSize="30sp"/>

</LinearLayout>

Main.xml

<?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="fill_parent"
  android:orientation="vertical" >

  <TextView
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:text="@string/hello" />
  <Gallery
      android:id="@+id/horizontallistview"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content" />

</LinearLayout>