Here I have created Set Image and Image ScrollView. In the below example when we clicked Image that image will be set on page. Below example will described you how to make Image View and ScrollView.

Step(1)activity_main.xml Layout-
<?xml version="1.0" encoding="utf-8" ?>

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:background="#80000000">


    <ImageView

        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageView1"
        android:layout_gravity="center"

        />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button" android:layout_gravity="center"
        android:visibility="invisible"/>
    <HorizontalScrollView

        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:id="@+id/scrollView"
        android:layout_gravity="center">

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            >

            <ImageView
                android:src="@drawable/image1"
                android:layout_width="125dp"
                android:layout_height="fill_parent"
                android:id="@+id/imageView2"
                android:padding="15dp"
                />

            <ImageView
                android:src="@drawable/image3"
                android:layout_width="125dp"
                android:layout_height="125dp"
                android:id="@+id/imageView3"
                android:layout_gravity="center"
                android:padding="15dp"/>

            <ImageView
                android:src="@drawable/images4"
                android:layout_width="125dp"
                android:layout_height="125dp"
                android:id="@+id/imageView4"
                android:layout_gravity="center"
                android:padding="15dp"/>

            <ImageView
                android:src="@drawable/image5"
                android:layout_width="125dp"
                android:layout_height="125dp"
                android:id="@+id/imageView5"
                android:layout_gravity="center"
                android:padding="15dp"
                />

            <ImageView
                android:src="@drawable/image6"
                android:layout_width="125dp"
                android:layout_height="125dp"
                android:id="@+id/imageView6"
                android:layout_gravity="center"
                android:padding="15dp"/>

        </LinearLayout>


    </HorizontalScrollView>
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Click on the Image"
        android:id="@+id/textView"
        android:layout_marginTop="50dp"
        android:textColor="#45454545"
        android:layout_marginLeft="120dp"/>


</LinearLayout>

Step(2)-MainActivity-

public class MainActivity extends Activity implements View.OnClickListener {
    ImageView imageView1;
    Button button;
    int tophone;
   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView1 = (ImageView) findViewById(R.id.imageView1);
        tophone = R.drawable.image2;
        ImageView imageView2 = (ImageView) findViewById(R.id.imageView2);
        ImageView imageView3 = (ImageView) findViewById(R.id.imageView3);
        ImageView imageView4 = (ImageView) findViewById(R.id.imageView4);
        ImageView imageView5 = (ImageView) findViewById(R.id.imageView5);
        ImageView imageView6 = (ImageView) findViewById(R.id.imageView6);
        button = (Button) findViewById(R.id.button);
        imageView2.setOnClickListener(this);
        imageView3.setOnClickListener(this);
        imageView4.setOnClickListener(this);
        imageView5.setOnClickListener(this);
        imageView6.setOnClickListener(this);

        button.setOnClickListener(this);

    }

    public void onClick(View v) {
        switch(v.getId())
        {
            case R.id.imageView2:
                imageView1.setImageResource(R.drawable.image2);
                tophone=R.drawable.image3;
                break;

            case R.id.imageView3:
                imageView1.setImageResource(R.drawable.image3);
                tophone=R.drawable.images4;
                break;

            case R.id.imageView4:
                imageView1.setImageResource(R.drawable.images4);
                tophone=R.drawable.image5;
                break;

            case R.id.imageView5:
                imageView1.setImageResource(R.drawable.image5);
                tophone=R.drawable.image6;
                break;

            case R.id.imageView6:
                imageView1.setImageResource(R.drawable.image6);
                tophone=R.drawable.image2;
                break;


            case R.id.button:
                InputStream a=getResources().openRawResource(tophone);
                Bitmap whatever;
                whatever = BitmapFactory.decodeStream(a);
                try {
                    getApplicationContext().setWallpaper(whatever);
                } catch (IOException e) {
                    e.printStackTrace();
                }

                break;
        }
    }
}