Question

我想检查填写的文本字段是否大于填写的其他文本字段。所以喜欢：

if (textfield1.getText().toString().equals(""))
Toast.makeText(getActivity(), "textfield one is empty, please fill in a number", Toast.LENGTH_SHORT).show();

我想要这样的事情：

if (textfield1.getText().toString().less than textfield2.getText().toString())
Toast.makeText(getActivity(), "textfield one is less than textfield two, this is not allowed", Toast.LENGTH_SHORT).show();

我无法找到

Answer 1

我假设你的TextViews中有数字？从Integer创建String并比较这些数字：

Integer input1 = Integer.parseInt(textfield1.getText().toString()); 
Integer input2 = Integer.parseInt(textfield2.getText().toString()); 

if (input1 < input2) { }

如果是输入长度，那么您正在谈论使用String.length()，如下所示：

if (textfield1.getText().toString().length() < textfield2.getText().toString().length()) {
}

Answer 2

试试这个

if(textfield1.getText().toString().trim().length() > 0 && textfield2.getText().toString().trim().length() > 0) {
    try {
        int i1 = Integer.parseInt(textfield1.getText().toString().trim());
        int i2 = Integer.parseInt(textfield2.getText().toString().trim());
        if(i1 > i2) {
            // do needfull here
        }
    } catch(Exception ex) {
        Log.e("tag", ex.getMessage());
        // user entered some character which is not number
    }
}

如何检查＆＃34; textfield1＆＃34; ＆LT; ＆＃34;文本字段2＆＃34;

2 个答案: