如何检查"textfield1“< "textfield2”

Question

我想检查一个填充的文本字段是否大于另一个填充的文本字段。就像：

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：

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();

我找不到

Answer 1

我想你的TextViews里有数字吧？从Integer中生成一个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，则使用String.length()，如下所示：

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

Answer 2

尝尝这个

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
    }
}