@Override
    public View getView(int position, View view, ViewGroup viewGroup) {         
 
        ImageView imageView = new ImageView(context);
        imageView.setImageResource(images[position]); 
        imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE); 
        imageView.setLayoutParams(new GridView.LayoutParams(120, 120)); 
        return imageView;
    }

@Override
    public View getView(int position, View view, ViewGroup viewGroup) {         
 
        ImageView imageView = new ImageView(context);
        imageView.setImageResource(images[position]); 
        imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE); 
        imageView.setLayoutParams(new GridView.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); 
        return imageView;
    }

<RelativeLayout
            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:padding="10dp"
            android:paddingBottom="0dp"
            android:paddingLeft="0dp"
            android:paddingRight="0dp"
            android:paddingTop="0dp"
            tools:context="com.example.mish.gallery2.MainActivity">
 
            <GridView
                android:id="@+id/gridView"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:paddingLeft="20dp"
                android:paddingTop="20dp"
                android:paddingRight="20dp"
                android:horizontalSpacing="10dp"
                android:numColumns="auto_fit"
                android:stretchMode="columnWidth"
                android:verticalSpacing="10dp"
 
 
                 />
 
        </RelativeLayout>