android - android：如何在没有 layout.xml 的情况下插入底部对齐的视图？

Question

我想通过使用 addView 方法动态插入视图，就像这样。

TextView view = new TextView(this);
view.setText("foo");
ViewGroup parentView = (ViewGroup) findViewById(R.id.main_layout);
parentView.addView(view);

如何对齐底部插入的视图？

Answer 1

试试这个你会得到结果：

    RelativeLayout parent = (RelativeLayout) findViewById(R.id.llayout);
        TextView textView = new TextView(this);
        textView.setText("foo");
    RelativeLayout.LayoutParams params= new RelativeLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, textView.getId());
    textView.setLayoutParams(params);

    parent.addView(textView);

Answer 2

Below code will align textview with bottom

   TextView view = new TextView(this);
   view.setText("foo");

   RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
           ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
   params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, view.getId());

   view.setLayoutParams(params);
   ViewGroup parentView = (ViewGroup) findViewById(R.id.viewgroup);
   parentView.addView(view);

Answer 3

也许您可以尝试使用 aRelativeLayout而不是 a ViewGroup，如下所示：

    RelativeLayout parent = (RelativeLayout) findViewById(R.id.layout_parent);
    TextView tv = new TextView(this);
    tv.setText("foo");

    RelativeLayout.LayoutParams lp= new RelativeLayout.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, tv.getId());
    tv.setLayoutParams(lp);

    parent.addView(tv);