how to configure 2.4Ghz and 5Hz mode on Hotspot mode?

recogine

Hi firefly,
May i know that how we configure Hotspot dual band frequency 2.4Ghz and 5GHz, currently android lollipop doesn't provide any interface for this changes.

please tell me how to do that, thanks a lot

isle

like this:

1. diff --git a/system/netd/server/SoftapController.cpp b/system/netd/server/SoftapController.cpp
   
2. index f4ece88..5e896fe 100755
   
3. --- a/system/netd/server/SoftapController.cpp
   
4. +++ b/system/netd/server/SoftapController.cpp
   
5. @@ -151,15 +151,16 @@ int SoftapController::setSoftap(int argc, char *argv[]) {
   
6.      if (!strcasecmp(argv[4], "hidden"))
   
7.          hidden = 1;
   
8. 
   
9. -    if (argc >= 5) {
   
10. +    channel = AP_CHANNEL_DEFAULT;
    
11. +    /*if (argc >= 5) {
    
12.          channel = atoi(argv[5]);
    
13.          if (channel <= 0)
    
14.              channel = AP_CHANNEL_DEFAULT;
    
15. -    }
    
16. +    }*/
    
17. 
    
18.      asprintf(&wbuf, "interface=%s\ndriver=nl80211\nctrl_interface="
    
19.              "/data/misc/wifi/hostapd\nssid=%s\nchannel=%d\nieee80211n=1\n"
    
20. -            "hw_mode=g\nignore_broadcast_ssid=%d\nwowlan_triggers=any\n",
    
21. +            "hw_mode=a\nignore_broadcast_ssid=%d\nwowlan_triggers=any\n",
    
22.              argv[2], argv[3], channel, hidden);
    
23. 
    
24.      if (argc > 7) {
    
25. diff --git a/system/netd/server/SoftapController.h b/system/netd/server/SoftapController.h
    
26. index 7063067..1695559 100644
    
27. --- a/system/netd/server/SoftapController.h
    
28. +++ b/system/netd/server/SoftapController.h
    
29. @@ -25,7 +25,7 @@
    
30. #define AP_BSS_STOP_DELAY      500000
    
31. #define AP_SET_CFG_DELAY       500000
    
32. #define AP_DRIVER_START_DELAY  800000
    
33. -#define AP_CHANNEL_DEFAULT     6
    
34. +#define AP_CHANNEL_DEFAULT     149
    
35. 
    
36. class SoftapController {
    
37. public:
    
38.                

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