Gallery Control Android Ex

 Gallery Control Android  Ex.

******************************* Main .xml ******************************
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    tools:context=".MainActivity">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/img"
        android:src="@mipmap/ic_launcher"/>
    <Gallery
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/gal"/>

</LinearLayout>

************************ Main .java ************************************


package com.example.gallery;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {
ImageView imageView;
Gallery gallery;
Integer photo[]={R.drawable.ch1,
R.drawable.ch2,
R.drawable.ch3,
R.drawable.ch4,
R.drawable.ch5,
R.drawable.ch7,
R.drawable.gh6,


};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView=(ImageView) findViewById(R.id.img);
        gallery=(Gallery)findViewById(R.id.gal);
        gallery.setAdapter(new ImageAdapter(this));
        gallery.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                imageView.setImageResource(photo[position]);
            }
        });

    }
    public class ImageAdapter extends BaseAdapter
    {
Context context;

        public ImageAdapter(Context context) {
            this.context = context;
        }

        @Override
        public int getCount() {
            return photo.length;
        }

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

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView imageView1=new ImageView(MainActivity.this);
            imageView1.setImageResource(photo[position]);
            return imageView1;
        }
    }
}