實現

FormValidation

package data;

import android.content.Context;
import android.support.annotation.NonNull;
import android.view.View;
import android.widget.EditText;

import com.afollestad.materialdialogs.DialogAction;
import com.afollestad.materialdialogs.MaterialDialog;
import com.self.zsp.dfs.R;

import java.math.BigDecimal;

import util.KeyboardUtils;
import widget.ZsDialog;

/**
 * Created on 2018/10/10.
 *
 * @desc 表單驗證
 */
public class FormValidation implements View.OnFocusChangeListener {
    /**
     * 上下文
     */
    private Context context;
    /**
     * 最大/小值
     */
    private BigDecimal bigDecimalMin;
    private BigDecimal bigDecimalMax;
    /**
     * 最大/小提示
     */
    private String minHint;
    private String maxHint;
    /**
     * 規則
     */
    private int rule;

    /**
     * constructor
     *
     * @param context       上下文
     * @param bigDecimalMin 最小值
     * @param minHint       最小提示
     * @param rule          規則
     */
    public FormValidation(Context context, BigDecimal bigDecimalMin, String minHint, int rule) {
        this.context = context;
        this.bigDecimalMin = bigDecimalMin;
        this.minHint = minHint;
        this.rule = rule;
    }

    /**
     * constructor
     *
     * @param context       上下文
     * @param bigDecimalMin 最小值
     * @param bigDecimalMax 最大值
     * @param minHint       最小提示
     * @param maxHint       最大提示
     * @param rule          規則
     */
    public FormValidation(Context context, BigDecimal bigDecimalMin, BigDecimal bigDecimalMax, String minHint, String maxHint, int rule) {
        this.context = context;
        this.bigDecimalMin = bigDecimalMin;
        this.bigDecimalMax = bigDecimalMax;
        this.minHint = minHint;
        this.maxHint = maxHint;
        this.rule = rule;
    }

    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (!hasFocus) {
            EditText editText = (EditText) v;
            String stringResult = editText.getText().toString();
            if (!"".equals(stringResult)) {
                // 輸框值
                BigDecimal bigDecimalResult = new BigDecimal(stringResult);
                switch (rule) {
                    // 不小於
                    case 1:
                        int minCompareResultNotLess = bigDecimalResult.compareTo(bigDecimalMin);
                        if (minCompareResultNotLess < 0) {
                            rangeShow(editText, minHint);
                        }
                        break;
                    // 中間
                    case 2:
                        int minCompareResultMiddle = bigDecimalResult.compareTo(bigDecimalMin);
                        int maxCompareResultMiddle = bigDecimalResult.compareTo(bigDecimalMax);
                        if (minCompareResultMiddle < 0) {
                            rangeShow(editText, minHint);
                        } else if (maxCompareResultMiddle > 0) {
                            rangeShow(editText, maxHint);
                        }
                        break;
                    default:
                        break;
                }
            }
        }
    }

    /**
     * 顯範圍
     *
     * @param editText 輸框
     * @param hint     提示
     */
    private void rangeShow(final EditText editText, String hint) {
        ZsDialog.materialStringContentDialogOneClick(context,
                hint,
                R.string.refill)
                .onPositive(new MaterialDialog.SingleButtonCallback() {
                    @Override
                    public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
                        dialog.dismiss();
                        KeyboardUtils.showKeyboardEditText(context, editText);
                    }
                }).cancelable(false).show();
    }
}
 

主程式碼

單提
editText.setOnFocusChangeListener(new FormValidation(getContext(), BigDecimal.valueOf(26), "粘度FV不可小於26", 1));
雙提
editText.setOnFocusChangeListener(new FormValidation(getContext(), BigDecimal.valueOf(0), BigDecimal.valueOf(6000), "扭矩不可小於0", "扭矩不可大於6000", 2));

表單驗證