安卓系统会首先读取BTM_DEF_LOCAL_NAME的值，如果为空，就使用"ro.product.model"作为蓝牙设备名。

system/bt/btif/src/btif_dm.cc

#define PROPERTY_PRODUCT_MODEL "ro.product.model"

......

static char* btif_get_default_local_name() {

  if (btif_default_local_name[0] == '\0') {

    int max_len = sizeof(btif_default_local_name) - 1;

    if (BTM_DEF_LOCAL_NAME[0] != '\0') {

      strncpy(btif_default_local_name, BTM_DEF_LOCAL_NAME, max_len);

    } else {

      char prop_model[PROPERTY_VALUE_MAX];

      osi_property_get(PROPERTY_PRODUCT_MODEL, prop_model, "");

      strncpy(btif_default_local_name, prop_model, max_len);

    }

    btif_default_local_name[max_len] = '\0';

  }

  return btif_default_local_name;

}

device/qcom/common/bdroid_buildcfg.h

#define BTM_DEF_LOCAL_NAME   "QCOM-BTD"

Tony Liu

2018-4-10