https://android.googlesource.com/platform/frameworks/base.git/+/master/core/java/com/android/internal/app/ResolverActivity.java

com.android.internal.app.ResolverActivity的safelyStartActivityInternal

protected void safelyStartActivityInternal(
TargetInfo cti, UserHandle user, @Nullable Bundle options)

UserHandle.of(user_id)
user_id = user_handle.getIdentifier();
————-
com.miui.xspace.utils.XSpaceResolverActivityHelper
private void forward(int userId)