android - 在 RelativeLayout 的 subview 上设置参数

Question

我无法准确找到我需要用来在相对布局的 subview 上设置参数的语法。我有一个根相对布局，我想像这样彼此相邻设置 2 个子 TextView

---------- ---------| Second | | First |---------- ---------

So I have

public class RL extends RelativeLayout{

    public RL(context){

        TextView first = new TextView(this);
        TextView second = new TextView(this);

        first.setText('First');
        first.setId(1);

        second.setText('Second');
        second.setId(2);

        addView(first, new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
    LayoutParams.WRAP_CONTENT, 
    LayoutParams.ALLIGN_PARENT_RIGHT ???);

        addView(first, new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
    LayoutParams.WRAP_CONTENT, 
    LayoutParams.ALLIGN_RIGHT_OF(first.getId()) ???);

    }
}

如何设置相对对齐方式？

Answer 1

public class RL extends RelativeLayout {

    public RL(Context context) {
        super(context);

        TextView first = new TextView(context);
        TextView second = new TextView(context);

        first.setText("First");
        first.setId(1);

        second.setText("Second");
        second.setId(2);

        RelativeLayout.LayoutParams lpSecond = new RelativeLayout.LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        addView(second, lpSecond);

        RelativeLayout.LayoutParams lpFirst = new RelativeLayout.LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        lpFirst.addRule(RelativeLayout.RIGHT_OF, second.getId());
        addView(first, lpFirst);
    }

}

如果您希望 View 的右边缘与其父 View 的右边缘对齐，则只需要 ALIGN_PARENT_RIGHT。在这种情况下，它会将“第一个” View 推离可见区域的一侧!