如何在Android中用一条线连接两个按钮？

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 1" />

    <View
        android:id="@+id/line"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#000000" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button 2" />

</LinearLayout>

Button button1 = findViewById(R.id.button1);
Button button2 = findViewById(R.id.button2);
View line = findViewById(R.id.line);

line.post(new Runnable() {
    @Override
    public void run() {
        int startX = button1.getLeft() + button1.getWidth() / 2;
        int startY = button1.getTop() + button1.getHeight() / 2;
        int endX = button2.getLeft() + button2.getWidth() / 2;
        int endY = button2.getTop() + button2.getHeight() / 2;

        line.setTranslationX(startX);
        line.setTranslationY(startY);
        line.getLayoutParams().width = (int) Math.sqrt(Math.pow(endX - startX, 2) + Math.pow(endY - startY, 2));
        line.setRotation((float) Math.toDegrees(Math.atan2(endY - startY, endX - startX)));
        line.requestLayout();
    }
});