microg/GmsCore · error · IllegalStateException

Value is not a float.

Error message

Value is not a float.

What it means

Format guard in fitness Value.asFloat: the Value's format is not FORMAT_FLOAT (stored as int, string, or map), so the internal representation cannot be safely returned as a float. The mismatch between the field's declared format and the accessor is at fault.

Source

Thrown at play-services-fitness/src/main/java/com/google/android/gms/fitness/data/Value.java:86

    /**
     * Returns the value of this object as an activity. The integer representation of the activity is converted to a String prior to returning.
     *
     * @return One of the constants from {@link FitnessActivities}; {@link FitnessActivities#UNKNOWN} if the object does not hold a valid activity
     * representation
     * @throws IllegalStateException If this {@link Value} does not correspond to a {@link com.google.android.gms.fitness.data.Field#FORMAT_INT32}
     */
    public String asActivity() {
        return null; // TODO
    }

    /**
     * Returns the value of this object as a float.
     *
     * @throws IllegalStateException If this {@link Value} does not correspond to a {@link com.google.android.gms.fitness.data.Field#FORMAT_FLOAT}
     */
    public float asFloat() {
        if (format != FORMAT_FLOAT) throw new IllegalStateException("Value is not a float.");
        return value;
    }

    /**
     * Returns the value of this object as a int.
     *
     * @throws IllegalStateException If this {@link Value} does not correspond to a {@link com.google.android.gms.fitness.data.Field#FORMAT_INT32}
     */
    public int asInt() {
        if (format != FORMAT_INT32) throw new IllegalStateException("Value is not a int.");
        return Float.floatToRawIntBits(this.value);
    }

    /**
     * Returns the value of this object as a string.
     *
     * @throws IllegalStateException If this {@link Value} does not correspond to a {@link com.google.android.gms.fitness.data.Field#FORMAT_STRING}
     */

View on GitHub (pinned to 157c9d86ac)

Solutions

1. Check getFormat() against Field.FORMAT_FLOAT before calling asFloat()
2. Use the accessor matching the value's actual format (asInt/asString)

When it happens

Trigger: Thrown at play-services-fitness/src/main/java/com/google/android/gms/fitness/data/Value.java:86 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microg/GmsCore@157c9d86ac (2026-09-06). Data as JSON: /api/errors/270596fb379887a9. Report an issue: GitHub.