如何在另一个ImageView上放置ImageViews？

<ImageView
    android:id="@+id/parentImageView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:src="@drawable/parent_image" />

ImageView parentImageView = findViewById(R.id.parentImageView);

ImageView childImageView1 = new ImageView(this);
childImageView1.setImageResource(R.drawable.child_image1);
parentImageView.addView(childImageView1);

ImageView childImageView2 = new ImageView(this);
childImageView2.setImageResource(R.drawable.child_image2);
parentImageView.addView(childImageView2);

FrameLayout.LayoutParams layoutParams1 = new FrameLayout.LayoutParams(
    FrameLayout.LayoutParams.WRAP_CONTENT,
    FrameLayout.LayoutParams.WRAP_CONTENT
);
layoutParams1.gravity = Gravity.TOP | Gravity.LEFT;
childImageView1.setLayoutParams(layoutParams1);

FrameLayout.LayoutParams layoutParams2 = new FrameLayout.LayoutParams(
    FrameLayout.LayoutParams.WRAP_CONTENT,
    FrameLayout.LayoutParams.WRAP_CONTENT
);
layoutParams2.gravity = Gravity.BOTTOM | Gravity.RIGHT;
childImageView2.setLayoutParams(layoutParams2);