Gallery

Image Gallery Example in Android


Posted by Sushant on July 2, 2012, filed in: Android Beginner Tutorials, Android Development

This example shows how create Image Gallery in android.

Algorithm:

1.) Create a new project by File-> New -> Android Project name it ImageGalleryExample.

2.) Add some sample .png image files to res/drawables folder.

3.) Write following into main.xml file:

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

     <ImageSwitcher android:id="@+id/switcher"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
    />

     <Gallery android:id="@+id/gallery"
        android:background="#55000000"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"

        android:gravity="center_vertical"
        android:spacing="16dp"
   />
</RelativeLayout>

4.) Run for output.

Steps:

1.) Create a project named ImageGalleryExample and set the information as stated in the image.

Build Target: Android 4.0
Application Name: ImageGalleryExample
Package Name: com. example. ImageGalleryExample
Activity Name: ImageGalleryExample
Min SDK Version: 14

2.) Open ImageGalleryExample.java file and write following code there:

package com.example.ImageGalleryExample;

import android.app.Activity;
 import android.content.Context;
 import android.os.Bundle;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.Window;
 import android.view.animation.AnimationUtils;
 import android.widget.AdapterView;
 import android.widget.BaseAdapter;
 import android.widget.Gallery;
 import android.widget.Gallery.LayoutParams;
 import android.widget.ImageSwitcher;
 import android.widget.ImageView;
 import android.widget.ViewSwitcher;
public class ImageGalleryExample extends Activity implements
         AdapterView.OnItemSelectedListener, ViewSwitcher.ViewFactory {
    @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main);
        mSwitcher = (ImageSwitcher) findViewById(R.id.switcher);
         mSwitcher.setFactory(this);
         mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
                 android.R.anim.fade_in));
         mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
                 android.R.anim.fade_out));
        Gallery g = (Gallery) findViewById(R.id.gallery);
         g.setAdapter(new ImageAdapter(this));
         g.setOnItemSelectedListener(this);
     }
    public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
         mSwitcher.setImageResource(mImageIds[position]);
     }
    public void onNothingSelected(AdapterView<?> parent) {
     }
    public View makeView() {
         ImageView i = new ImageView(this);
         i.setBackgroundColor(0xFF000000);
         i.setScaleType(ImageView.ScaleType.FIT_CENTER);
         i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.MATCH_PARENT,
                 LayoutParams.MATCH_PARENT));
         return i;
     }
    private ImageSwitcher mSwitcher;
    public class ImageAdapter extends BaseAdapter {
         public ImageAdapter(Context c) {
             mContext = c;
         }
        public int getCount() {
             return mThumbIds.length;
         }
        public Object getItem(int position) {
             return position;
         }
        public long getItemId(int position) {
             return position;
         }
        public View getView(int position, View convertView, ViewGroup parent) {
             ImageView i = new ImageView(mContext);
            i.setImageResource(mThumbIds[position]);
             i.setAdjustViewBounds(true);
             i.setLayoutParams(new Gallery.LayoutParams(
                     LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
             i.setBackgroundResource(R.drawable.picture_frame);
             return i;
         }
        private Context mContext;
    }
    private Integer[] mThumbIds = {
             R.drawable.sample_thumb_0, R.drawable.sample_thumb_1,
             R.drawable.sample_thumb_2, R.drawable.sample_thumb_3};
    private Integer[] mImageIds = {
             R.drawable.sample_0, R.drawable.sample_1, R.drawable.sample_2,
             R.drawable.sample_3};
}

3.) Compile and build the project.

Output

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