修改设备名称，蓝牙名称，wifi直连名称

原文地址：http://www.javashuo.com/article/p-nvkwjbca-mg.html

1. wifi direct or wifi p2p

默认名称为Android_XXXX.

frameworks\opt\net\wifi\service\java\com\android\server\wifi\p2p\WifiP2pServiceImpl.java
    private String getPersistedDeviceName() {
        String deviceName = Settings.Global.getString(mContext.getContentResolver(),
                Settings.Global.WIFI_P2P_DEVICE_NAME);
        if (deviceName == null) {
            String wifi_direct_name = mContext.getResources().getString(
                R.string.def_wifi_direct_name);
            if (!TextUtils.isEmpty(wifi_direct_name)){
                    return wifi_direct_name;
            }
            /* We use the 4 digits of the ANDROID_ID to have a friendly
             * default that has low likelihood of collision with a peer */
            String id = Settings.Secure.getString(mContext.getContentResolver(),
                    Settings.Secure.ANDROID_ID);
            return "Android_" + id.substring(0,4);
        }
        return deviceName;
    }

2. hotspot or softap

默认名称为Android_XXXX

frameworks\opt\net\wifi\service\java\com\android\server\wifi\WifiApConfigStore.java
   /**
     * Generate a default WPA2 based configuration with a random password.
     * We are changing the Wifi Ap configuration storage from secure settings to a
     * flat file accessible only by the system. A WPA2 based default configuration
     * will keep the device secure after the update.
     */
    private WifiConfiguration getDefaultApConfiguration() {
        WifiConfiguration config = new WifiConfiguration();
        config.SSID = mContext.getResources().getString(
                R.string.wifi_tether_configure_ssid_default);
        int wifiApSecurityType = mContext.getResources().getInteger(
                R.integer.wifi_hotspot_security_type);
        config.allowedKeyManagement.set(wifiApSecurityType);
        config.preSharedKey = mContext.getResources().getString(
                R.string.def_wifi_wifihotspot_pass);
        if (TextUtils.isEmpty(config.preSharedKey)) {
            String randomUUID = UUID.randomUUID().toString();
            //first 12 chars from xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
            config.preSharedKey = randomUUID.substring(0, 8) + randomUUID.substring(9,13);
        }
        return config;
    }

frameworks/base/core/res/res/values/strings.xml
<string name="wifi_tether_configure_ssid_default" translatable="false">AndroidAP</string>

3. bluetooth

默认名称为QCOM-BTD

device/qcom/commom/bdroid_buildcfg.h
 
#define BTM_DEF_LOCAL_NAME   "QCOM-BTD"
system/bt/btif/src/btif_dm.cc or
vendor/qcom/opensource/commonsys/system/bt/btif/src/btif_dm.cc
 
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') {  //若该值定义，使用该值
      strncpy(btif_default_local_name, BTM_DEF_LOCAL_NAME, max_len);
    } else { //若该值未定义，使用产品名PROPERTY_PRODUCT_MODEL(ro.product.model)
      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;
}