Android Edtext 保留小数后几位

这个是封装好的一个Edtext

public class KeepDecimalEditText extends AppCompatEditText {
    public int DECIMAL_DIGITS = 5;//可输入小数的位数
    public int defaultDecimal = 5;//显示小数的位数
    public boolean isChangeDecimal = false;//是否转换只输入整数
    public boolean isInput = false;//是否是输入的

    
    public interface ICallBack {
        void onInputEditText(String str);
    }

    
    ICallBack icallBack = null;

    
    public void setOnInputEditText(ICallBack iBack) {
        icallBack = iBack;
    }

    public KeepDecimalEditText(Context context) {
        super(context, null);
    }

    public KeepDecimalEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray typedArray = context.getTheme().obtainStyledAttributes(attrs, R.styleable.KeepDecimalEditText, 0, 0);
        typedArray.getIndexCount();
        typedArray.getIndex(0);
        DECIMAL_DIGITS = typedArray.getInteger(R.styleable.KeepDecimalEditText_decimal, 5);
        defaultDecimal = typedArray.getInteger(R.styleable.KeepDecimalEditText_decimal, 5);
        initOnTouchListener();
        initTextChangedListener();
    }


    public void setDECIMAL_DIGITS() {
        this.DECIMAL_DIGITS = defaultDecimal;
        isInput = false;
    }

    public void setDECIMAL_DIGITS(int DECIMAL_DIGITS) {
        this.DECIMAL_DIGITS = DECIMAL_DIGITS;
    }

    public int getDECIMAL_DIGITS() {
        return DECIMAL_DIGITS;
    }

    public void setChangeDecimal(boolean changeDecimal) {
        isChangeDecimal = changeDecimal;
    }

    private void initTextChangedListener() {
        addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if (s.toString().contains(".")) {
                    if ((s.toString()+"a").split("\.").length > 2){//防止输入多个“.”
                        s = s.toString().substring(0,s.toString().length() -1);
                        setText(s);
                        setSelection(s.length());
                    }
                    if (s.length() - 1 - s.toString().indexOf(".") == 0 && DECIMAL_DIGITS == 0) {
                        s = s.toString().subSequence(0, s.toString().indexOf("."));
                        setText(s);
                        setSelection(s.length());
                        return;
                    }
                    if (s.length() - 1 - s.toString().indexOf(".") > DECIMAL_DIGITS) {
                        if (DECIMAL_DIGITS == 0) {
                            s = s.toString().subSequence(0,
                                    s.toString().indexOf(".") + DECIMAL_DIGITS);
                        } else {
                            s = s.toString().subSequence(0,
                                    s.toString().indexOf(".") + DECIMAL_DIGITS + 1);
                        }
                        setText(s);
                        setSelection(s.length());
                    }
                }
                if (s.toString().trim().equals(".")) {
                    s = "0" + s;
                    setText(s);
                    setSelection(s.toString().length());
                }
                if (s.toString().startsWith("0")
                        && s.toString().trim().length() > 1) {
                    if (DECIMAL_DIGITS == 0) {
                        setText(s.subSequence(1, s.toString().length()));
                        setSelection(1);
                        return;
                    }
//                    else if (!s.toString().substring(1).equals(".")) {//注释掉，否则无法输入0.*
//                        setText(s.subSequence(0, 1));
//                        setSelection(1);
//                        return;
//                    }
                }
                if (icallBack != null && isInput) {
                    icallBack.onInputEditText(s.toString());
                }
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
    }

    private void initOnTouchListener() {
        setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                isInput = true;
                if (isChangeDecimal) {
                    DECIMAL_DIGITS = 0;
                }else{
                    DECIMAL_DIGITS = defaultDecimal;
                }
                return false;
            }
        });
    }
}

然后在 Values中创建一个 attrs.xml文件

使用到的一些工具类

public class CalculateUtils {

    //保留五位小数
    public static String keepTwoDecimal(double data){
        return new DecimalFormat("#0.00").format(data);
    }

    //获取件的数量
    public static Double getPieceCount(Double currentCount, List packageConfigsBeen){
        int pieceUom = 1;
        for (PackageConfigsBean packageConfigsBean : packageConfigsBeen){
            if ("EA".equals(packageConfigsBean.getPackageCode())){
                pieceUom = packageConfigsBean.getContainerValue();
            }
        }
        return currentCount / pieceUom;
    }

    //字符串转换成double类型
    public static Double stringToDouble(String value){
        if (TextUtils.isEmpty(value)){
            return 0d;
        }
        return Double.valueOf(value);
    }

    public static String controlDecimal(String data){
        if (TextUtils.isEmpty(data)){
            return "";
        }
        if (data.contains(".")){

        }
        return data;
    }
}

使用方法 xml布局中
app:decimal=“2” 是保留的小数位数

Activity中的使用方法

        etCurrentIncome.setOnInputEditText(new KeepDecimalEditText.ICallBack() {
            @Override
            public void onInputEditText(String str) {
//                inputCurrentIncome = judgeNum(str, currentUom, asnResponseBean.getPackageConfigs());

                if (!TextUtils.isEmpty(etWeightOfGoods.getText().toString()) &&
                        !TextUtils.isEmpty(str)) {
                    //先转换为件的数量
                    Double pieceCount = CalculateUtils.stringToDouble(str);
                    if (Double.valueOf(etWeightOfGoods.getText().toString()) >= 0) {
                        etGoodsWeight.setText(CalculateUtils.keepTwoDecimal(pieceCount * Double.valueOf(etWeightOfGoods.getText().toString())));
                    }
                }
            }
        });