Question

I m new to Anders. 我试图书写一种在其中作陈述的方法。我想要做到的是,“如果文本概览中的案文与某种价值相等,就改变布局中的背景形象”。我知道背景比照工作,我把问题缩小到发言中。下面的代码显示Book是一份文本意见,而VtvString是具有显示Book价值的扼杀。 bgview为布局。

        String tvString = showBook.getText().toString(); 
    bookDisp.setText(tvString); 
    View mainbg = bgview.getRootView(); 
    if(bookDisp.equals("John")){ 
    mainbg.setBackgroundResource(R.drawable.dbvjohn);

问题是:

if(bookDisp.equals("John")){

它不想将书记与“John”号插图相比较。不过,如果我比较两个案文观点,例如,它将发挥作用。

if(bookDisp.equals(newTextView)){

so I think the problem is the .equals bit. what code would I use to compare bookDisp with "John"? it s not if(bookDisp = ("John")){ because Eclipse wants me to change bookDisp to a string. So what would be the proper code to compare a textview bookDisp to a string "John"?

永远不会忘记民俗! 我把这一错误算出,而这一错误完全是用这种方法,而是用另一种方法。我有<代码>+曲线(1)+“; in that means, so the strings in the textviews are showing as “John” and the “if” statement above is search for “John”。

Answer 1

使用:

if ("John".equals(bookDisp.getText().toString())) {

Answer 2

也许希望使用:

bookDisp.getText().toString().equals("John");

Answer 3

a. 比较以下图象:

tvString. Equals (“John”);

Answer 4

You need to get the text from the TextView in order to see if it equals "John". do: bookDisp.getText().equals("John")

That should work. getText for TextViews returns an editable. Heres the class so you can work with it: Editable Class

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