What causes "type[] length is not 6" in Bigkoo/Android-PickerView?

Always pass a 6-element boolean[] in order year, month, day, hours, minutes, seconds

Bigkoo/Android-PickerView · error · RuntimeException

type[] length is not 6

Error message

type[] length is not 6

What it means

WheelTime.setLunar throws an uncaught RuntimeException when the boolean[] type array configuring which wheels (year, month, day, hours, minutes, seconds) are visible does not have exactly 6 elements. The array is indexed element-by-element, so any other length is invalid.

Solutions

Always pass a 6-element boolean[] in order year, month, day, hours, minutes, seconds
Use the Builder's setType(boolean...) and pass all 6 flags, using false for wheels you want hidden
Note this variant throws RuntimeException (not IllegalArgumentException) — don't rely on catching the declared type

Example fix

// before
timePicker.setType(new boolean[]{true, true, true}); // throws
// after
timePicker.setType(new boolean[]{true, true, true, false, false, false});

Defensive patterns

Strategy: validation

Validate before calling

static boolean isValidTypeArray(boolean[] type) {
    return type != null && type.length == 6;
}

Type guard

static boolean[] requireSixFlags(boolean[] type) {
    if (type == null || type.length != 6)
        throw new IllegalArgumentException("type must have 6 flags: year,month,day,hours,minutes,seconds");
    return type;
}

Try / catch

try {
    wheelTime.setLunar(type);
} catch (RuntimeException e) {
    wheelTime.setLunar(new boolean[]{true,true,true,true,true,true});
}

Prevention

Always build the type array with exactly 6 entries (year, month, day, hours, minutes, seconds)
Use false, not a shorter array, to hide wheels
Define a shared constant like ALL_SIX = {true,true,true,true,true,true}

When it happens

Trigger: Calling setLunar with a boolean[] shorter or longer than 6, e.g. new boolean[]{true,true,true} to show only y/m/d, or building the array dynamically with a variable count.

Common situations: Wanting to hide some units and assuming a shorter array means 'show only these'; copying a snippet with a 3- or 5-element array; refactoring the type array without updating all initializers.

Related errors

AI-assisted analysis of Bigkoo/Android-PickerView@e200d8c063 (2026-09-07). Data as JSON: /api/errors/a041f6837d4f3c71. Report an issue: GitHub.

Appendix: source

Thrown at pickerview/src/main/java/com/bigkoo/pickerview/view/WheelTime.java:219

                }

                if (currentIndex > maxItem - 1) {
                    wv_day.setCurrentItem(maxItem - 1);
                }

                if (mSelectChangeCallback != null) {
                    mSelectChangeCallback.onTimeSelectChanged();
                }
            }
        });

        setChangedListener(wv_day);
        setChangedListener(wv_hours);
        setChangedListener(wv_minutes);
        setChangedListener(wv_seconds);

        if (type.length != 6) {
            throw new RuntimeException("type[] length is not 6");
        }
        wv_year.setVisibility(type[0] ? View.VISIBLE : View.GONE);
        wv_month.setVisibility(type[1] ? View.VISIBLE : View.GONE);
        wv_day.setVisibility(type[2] ? View.VISIBLE : View.GONE);
        wv_hours.setVisibility(type[3] ? View.VISIBLE : View.GONE);
        wv_minutes.setVisibility(type[4] ? View.VISIBLE : View.GONE);
        wv_seconds.setVisibility(type[5] ? View.VISIBLE : View.GONE);
        setContentTextSize();
    }

    /**
     * 设置公历
     *
     * @param year
     * @param month
     * @param day
     * @param h
     * @param m

View on GitHub (pinned to e200d8c063)