java - 无法更改 getView() 中的线性布局高度

Question

fragment.xml包含线性布局和RelativeLayout内的按钮。我需要在单击按钮时调整线性布局的高度，但它不起作用(什么也没有发生)。但是，设置 TextView 的文本是有效的。有任何想法吗？我不确定这是否可能。

getView() 函数:

@Override
public View getView(int _position, View _view, ViewGroup _parent) {

View view = _view;

ViewHolder m_viewHolder ;

 if (view == null) {

    LayoutInflater inflater = (LayoutInflater) m_ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

     view = inflater.inflate(R.layout.fragment_user, _parent, false);

     m_viewHolder = new ViewHolder();

     m_viewHolder.btn_test = (ImageButton)view.findViewById(R.id.btn_details);

     m_viewHolder.btn_test.setOnClickListener(changeLLHeight);

     view.setTag(m_viewHolder);

} else {
     m_viewHolder = (ViewHolder) view.getTag();
}

m_viewHolder.btn_test.setTag(_position);


return view;
}

OnClickListener():

private View.OnClickListener changeLLHeight = new View.OnClickListener() {
  @Override
  public void onClick(View v) {

    RelativeLayout rl = (RelativeLayout)v.getParent();

    LinearLayout ll = (LinearLayout)rl.getChildAt(1);

    TextView tv = (TextView)rl.getChildAt(2);

    ll.getLayoutParams().height = 20;
    ll.requestLayout();

    tv.setText("Oi!!");

    Toast.makeText(getContext(), "", Toast.LENGTH_SHORT).show();


  }
};

Answer 1

你可以使用

LinearLayout ll = (LinearLayout)rl.getChildAt(1);
LayoutParams params = ll.getLayoutParams();

// Changes the height and width to the specified *pixels*
params.height = 100;
params.width = 100;
ll.setLayoutParams(params);