vnd.google.fitness.data_type/com.google.step_count.cumulative
vnd.google.fitness.data_type/com.google.step_count.delta
vnd.google.fitness.data_type/com.google.heart_rate.bpm
vnd.google.fitness.data_type/com.google.activity.segment
vnd.google.fitness.data_type/com.example.my_type

[1] DataType   |   Google APIs for Android   |   Google Developers ( 版) https://developers.google.com/android/reference/com/google/android/gms/fitness/data/DataType#MIME_TYPE_PREFIX

The common prefix for data type MIME types, for use in intents. The MIME type for a particular data type will be this prefix followed by the data type name. Examples:

vnd.google.fitness.data_type/com.google.heart_rate.bpm

vnd.google.fitness.data_type/com.google.activity.segment

vnd.google.fitness.data_type/com.example.my_type

[2] Data Attribution   |   Google Fit   |   Google Developers ( 版) https://developers.google.com/fit/android/data-attribution

    <data android:mimeType="vnd.google.fitness.data_type/com.google.step_count.cumulative" />

    <data android:mimeType="vnd.google.fitness.data_type/com.google.step_count.delta" />