在Android上将字符串转换为整数

Converting a string to an integer on Android(在Android上将字符串转换为整数)

问题描述

如何将字符串转换为整数?

How do I convert a string into an integer?

我有一个文本框让用户输入一个数字:

I have a textbox I have the user enter a number into:

EditText et = (EditText) findViewById(R.id.entry1);
String hello = et.getText().toString();

并将值赋给字符串hello.

我想把它转换成一个整数，这样我就可以得到他们输入的数字；稍后将在代码中使用.

I want to convert it to a integer so I can get the number they typed; it will be used later on in code.

有没有办法让 EditText 变成一个整数?那将跳过中间人.如果没有，字符串转整数就可以了.

Is there a way to get the EditText to a integer? That would skip the middle man. If not, string to integer will be just fine.

推荐答案

查看 Integer 类和静态 parseInt() 方法:

See the Integer class and the static parseInt() method:

http://developer.android.com/reference/java/lang/整数.html

Integer.parseInt(et.getText().toString());

您需要捕获 NumberFormatException 以防在解析时出现问题，因此:

You will need to catch NumberFormatException though in case of problems whilst parsing, so:

int myNum = 0;

try {
    myNum = Integer.parseInt(et.getText().toString());
} catch(NumberFormatException nfe) {
   System.out.println("Could not parse " + nfe);
} 

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