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我有一个扩展RelativeLayout 的类。在这里面我有另一个相对布局，它有一定的高度和宽度，里面有一个 webview 和一个按钮。此按钮位于第二个相对布局的右上角。我根据在开关盒中传递的枚举将 webview 的位置设置在第二个相对布局的顶部、左侧、右侧、底部和中心。我面临的问题是，当我将 webview 设置在顶部时，它与按钮重叠并且按钮不可见。这是我的代码：

enum position {

    Top, Bottom, Left, Right, Center
};

public class Sample extends RelativeLayout {
RelativeLayout layout = new RelativeLayout(context);
        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
                width, height);
        addView(layout, params);

        closeButton = new Button(context);
        closeButton.setId(1);
        closeButton.setText("X");
        RelativeLayout.LayoutParams child1Params = new RelativeLayout.LayoutParams(
                RelativeLayout.LayoutParams.WRAP_CONTENT,
                RelativeLayout.LayoutParams.WRAP_CONTENT);
        child1Params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
        child1Params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
        layout.addView(closeButton, child1Params);

        closeButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                closePressed();
            }
        });

        RelativeLayout.LayoutParams child2Params = new RelativeLayout.LayoutParams(
                RelativeLayout.LayoutParams.WRAP_CONTENT,
                RelativeLayout.LayoutParams.WRAP_CONTENT);

        switch (position) {

        case Top:


            webView = new WebView(context);
            child2Params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
            layout.addView(webView, child2Params);
            break;

        case Bottom:


            webView = new WebView(context);
            child2Params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
            layout.addView(webView, child2Params);
            break;

        case Left:


            webView = new WebView(context);
            child2Params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
            layout.addView(webView, child2Params);
            break;

        case Right:


            webView = new WebView(context);
            child2Params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
            layout.addView(webView, child2Params);
            break;

        case Center:


            webView = new WebView(context);
            child2Params.addRule(RelativeLayout.CENTER_VERTICAL);
            layout.addView(webView, child2Params);
            break;

        default:


            webView = new WebView(context);
            child2Params.addRule(RelativeLayout.CENTER_VERTICAL);
            layout.addView(webView, child2Params);
            break;
        }
}

您能否告诉我如何始终设置按钮下方的 webview，使其始终显示在按钮下方并且按钮不隐藏在其下方？谢谢你。

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