android - How can I get the size of a string array?

Question

I have a text file, I use this code to split and process this content:

String[] array = s.split(",");

How I can get size of this array?

The text file filling dynamic, and I don't know size of the items.

I can get the size of ArrayList<string>, but this object is unuseable here.

public ArrayList<String> myList = new ArrayList<String>();                    
myList =s.split(",");//error:cannot convert from String[] to ArrayList<String>

Answer 1

如果您想要此数组中的元素数量，String[] array = s.split(",");只需执行以下操作：

array.length

要将此数组转换为列表，请执行以下操作：

public ArrayList<String> myList = new ArrayList<String>();                    
String[] array = s.split(",");
myList = Arrays.asList(array);

Answer 2

看看这个帖子，了解array和Arraylist的区别

数组的长度属性在哪里定义？

要回答您的问题，您可以通过调用 .length 来获取数组的大小。

array.length

您还应该查看此内容以了解有关数组的更多信息。

http://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

Answer 3

在 String 中有两种获取 String 长度的方法：-

String s; 
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
   s.length();
}

Answer 4

这取决于您所说的项目大小。您可以使用array.length()or array.size()，例如，可能类似于

Integer arrayLength = (Integer) array.length();

或者

Integer arrayLength = (Integer) array.size();

我会想象...

有关如何size()和length()不同的更多信息，请参阅集合中的计数、长度和大小