在带有阴影的LinearLayout上获取拐角半径

public class RoundedShadowLinearLayout extends LinearLayout {
    private float cornerRadius;

    public RoundedShadowLinearLayout(Context context) {
        super(context);
        init(context, null);
    }

    public RoundedShadowLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context, attrs);
    }

    private void init(Context context, AttributeSet attrs) {
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundedShadowLinearLayout);
        cornerRadius = a.getDimension(R.styleable.RoundedShadowLinearLayout_cornerRadius, 0);
        a.recycle();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        // 在这里绘制圆角和阴影
        // ...
    }

    public float getCornerRadius() {
        return cornerRadius;
    }
}

<com.google.android.material.card.MaterialCardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:cardCornerRadius="8dp"
    app:cardElevation="4dp">

    <!-- 你的LinearLayout或其他视图 -->

</com.google.android.material.card.MaterialCardView>

try {
    Field field = View.class.getDeclaredField("mRadius");
    field.setAccessible(true);
    float cornerRadius = field.getFloat(yourView);
} catch (Exception e) {
    e.printStackTrace();
}