Question

如何在android中设置两个整数后的小数点，并将限制设置为仅55位？经过大量搜索，我在这里发布了我的问题。我有Edittext android:inputType="number"。我可以将最大限制设置为EditText到55位。我希望用户能够键入小数位，在0到55之间数字，如24.22或52.88。

有些人可以告诉我如何实现这一目标？这是我的代码。

public class FuelCostCalculator extends DialogFragment {

    EditText etLocation, etKilo, etLiter, etFuelCost;



    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setStyle(DialogFragment.STYLE_NORMAL, R.style.fullscreen_dialog);
    }

    private void init(View view) {
       //this is my editText
       etLiter = view.findViewById(R.id.etLiter);
       InputFilterMinMax filter = new InputFilterMinMax("0", "5499") {};
       etLiter.setFilters(new InputFilter[]{filter});

    }
  }

我的过滤器类是：

public class InputFilterMinMax implements InputFilter {

    private int min, max;

    public InputFilterMinMax(int min, int max) {
        this.min = min;
        this.max = max;
    }

    public InputFilterMinMax(String min, String max) {
        this.min = Integer.parseInt(min);
        this.max = Integer.parseInt(max);
    }

    @Override
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        try {
            int input = Integer.parseInt(dest.toString() + source.toString());
            if (isInRange(min, max, input))
                return null;
        } catch (NumberFormatException nfe) { }
        return "";
    }

    private boolean isInRange(int a, int b, int c) {
        return b > a ? c >= a && c <= b : c >= b && c <= a;
    }
}

感谢任何形式的帮助：

Answer 1

检查这个答案。虽然它不是那么干净但它可以根据您的需要工作。假设actAddItemFromDropdownList是您的编辑文本，并且您已在Xml中设置了最大数字限制。

int max =0;
String text ="";
actAddItemFromDropdownList.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {


        }

        @Override
        public void afterTextChanged(Editable editable) {

            if(actAddItemFromDropdownList.getText().length()>0){
                if(text.equals(actAddItemFromDropdownList.getText().toString())){
                    text = "";
                }else {
                    text = actAddItemFromDropdownList.getText().toString();
                    max = max + 1;
                    if (max == 2) {
                        text = text + ".";
                        max = 0;
                        actAddItemFromDropdownList.setText(text);
                        actAddItemFromDropdownList.setSelection(actAddItemFromDropdownList.getText().length());
                    }
                }
            }



        }
    });

尝试它，如果它工作标记为选定的答案。

如何在edittext中的两位数后强制小数点？

1 个答案: