用按钮更改textview的文本大小

Question

I want to implement a feature that allows user to change the textSize of a textView in another view inside the app,

So I have a button with its ＂onClick" property set to:

Class mainActivity
    public void increaseFont(View view)
    {
        MainViewPager.changeTextViewTextSize(mTextSize);
    }

Class MainViewPager

    static public void changeTextViewTextSize(int aTextSize)
    {
        View detailView = (View) LayoutInflater.from(mContext).inflate(R.layout.details, null);
        TextView description = (TextView) detailView.findViewById(R.id.story_description);
        description.setTextSize(aTextSize);
    }

QUESTIONS is the textSize can't be changed when clicking the button. So how to?

Answer 1

The text size can changed at run time of course. You issue is related to the method changeTextViewTextSize . Using the inflater you are creating a new instance of R.layout.details , and through it, you are looking for the TextView you want to change the text size. But that layout is not at screen. It is not what you are seeing.