Java 如何以正确的方式从 EditText 获得双倍?

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时间:2020-08-13 23:44:09  来源:igfitidea点击:

How to get double from EditText the right way?

javaandroidparsingandroid-edittextdouble

提问by user3460769

Does anyone know how to parse a double from an EditText?

有谁知道如何从 EditText 解析双精度值?

I know how to do it, but it isn't the right way I think. Does anyone have best practises?

我知道该怎么做,但这不是我认为的正确方式。有没有人有最佳实践?

Thank you.

谢谢你。

采纳答案by Ersin Gülbahar

you can try this:

你可以试试这个:

double value;
String text =your_edittext.getText().toString();
if(!text.isEmpty())
try
{
   value= Double.parseDouble(text);
   // it means it is double
} catch (Exception e1) {
   // this means it is not double 
   e1.printStackTrace();
}

回答by Aniruddha

Whatever you type in EditText is String.

无论您在 EditText 中键入什么,都是字符串。

How to check if edittext is empty?

如何检查edittext是否为空?

String str = edit_text.getText().toString();
if (str.trim().equals("")
Toast.makeText(getApplicationContext(),
                    "EditText is empty.",
                    Toast.LENGTH_SHORT).show();