如何使edittext既包括signed也包含十进制？

is there a way to change edittext settings to both decimal (3.4) and singed(+/-)? and what tipe of variable should i set in my activity? I tried with decimal, number and signed but i want to use a number like -3.6 and to store it in my activity.

有没有办法将edittext设置更改为十进制(3.4)和烧结(+/-)?我应该在活动中设置什么样的变量?我尝试使用十进制,数字和签名,但我想使用像-3.6这样的数字并将其存储在我的活动中。

1 个解决方案

#1

In your activity class:

在您的活动类中:

EditText editText = (EditText)findViewById(R.id.editText);
editText.setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_SIGNED | InputType.TYPE_NUMBER_FLAG_DECIMAL);

from InputType | Android Developers

来自InputType | Android开发者

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OR:

In your activity class:

在您的活动类中:

EditText editText = (EditText)findViewById(R.id.editText);
editText.setKeyListener(DigitsKeyListener.getInstance("0123456789.-"));

That allows the EditText to input decimals and negative signs, as you can see at the end of the line.

这允许EditText输入小数和负号,正如您在行尾看到的那样。

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OR:

In your EditText XML properties, add this property:

在EditText XML属性中,添加以下属性:

android:inputType="numberSigned|numberDecimal"

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You can input the number to a String to store the value inputted:

您可以将数字输入到String以存储输入的值:

EditText editText = (EditText)findViewById(R.id.editText);
String userInput = editText.getText().toString();

userInput will then be equal to the String that the user inputted. To convert it to a double, you can do this:

userInput将等于用户输入的String。要将其转换为double,您可以执行以下操作:

// however, this will break your app if you convert an empty String to a double
// so if there could be no text in the EditText, use a try-catch
double userInputDouble = Double.parseDouble(editText.getText().toString());