相对布局 addRule 不起作用

Question

伙计们，我有一个卡片视图，我想用规则在上面添加 2 个按钮，但 addRule() 方法不起作用。在图片中，正在出现图 A，但我想制作图 B，我的意思是，我希望按钮设置 align_parent_right 和 align_parent_bottom 以及与第一个按钮相邻的第二个按钮。当我运行它时，会出现图 A。有什么建议吗？

RelativeLayout.LayoutParams rl= (RelativeLayout.LayoutParams) iView.getLayoutParams();        
RelativeLayout.LayoutParams lparams = new RelativeLayout.LayoutParams(width/4,height/5);
RelativeLayout.LayoutParams lparams2 = new RelativeLayout.LayoutParams(width/4,height/5);

removeButton=new Button(mContext);
modifyButton=new Button(mContext);

lparams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
lparams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

cardView.setLayoutParams(rl);

cardView.addView(removeButton,lparams);
cardView.addView(modifyButton,lparams2);

Answer 1

试试这个：-

 RelativeLayout mainLayout = (RelativeLayout) findViewById(R.id.mainLayout);

        CardView cardView = new CardView(this);
        ViewGroup.LayoutParams cardParams = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        cardView.setLayoutParams(cardParams);
        mainLayout.addView(cardView);

        RelativeLayout relativeLayout = new RelativeLayout(this);
        ViewGroup.LayoutParams layoutParams = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        relativeLayout.setLayoutParams(layoutParams);
        cardView.addView(relativeLayout);

        LinearLayout linearLayout = new LinearLayout(this);
        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
        linearLayout.setLayoutParams(params);
        linearLayout.setOrientation(LinearLayout.HORIZONTAL);
        linearLayout.setGravity(Gravity.RIGHT);
        relativeLayout.addView(linearLayout);

        Button removeButton = new Button(this);
        Button modifyButton = new Button(this);

        removeButton.setText("Remove");
        modifyButton.setText("Modify");

        linearLayout.addView(removeButton);
        linearLayout.addView(modifyButton);