以编程方式获取TextView大小

Question

我的代码：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    Uri uri = Uri.parse("Home");
    if (mListener != null) {
        mListener.onFragmentInteraction(uri);
    }
    View rootView = inflater.inflate(R.layout.fragment_main, container, false);
    LinearLayout linearLayout = (LinearLayout) rootView.findViewById(R.id.mesage_linear1);
    final TextView message = new TextView(getActivity());
    number_view.setText("Long Text");
    int m_width = message.getMeasuredWidth();
    int m_height = message.getMeasuredHeight();
    Toast.makeText(getActivity(),"Height : "+m_height+"\nWidth : "+m_width,Toast.LENGTH_LONG).show();
    return rootView;
}

我想获得以编程方式创建的TextView的高度和宽度。

输出为高度：0且宽度：0

Answer 1

此时View还没有布局。您必须手动测量它（通过View.measure()）或等到它布局：

textView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
        textView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
        int height = textView.getHeight();
        int width = textView.getWidth();
    }
});

Answer 2

    TextView tv=(TextView)findViewById(R.id.text);
    tv.setText("Android");
    tv.measure(0, 0);
    tv.getMeasuredWidth();
    tv.getMeasuredHeight(); 
    tv.getTextSize();