android: how to restrict data access to 2g by code?

Question

i want to set the system preference (by code) for just using 2g networks instead of using 3g. so far i haven't found anything that could have helped me. i suppose i need to set it via the ConnectionManager? can anyone point me in the right direction here?

Answer 1

Unfortunately, you can't do this. The best you can do is take the user to the relevant settings screen (Mobile Network Settings), where they can choose for themselves. There's no API to actually change the setting.

Some ROMs (e.g. CyanogenMod) build this into the system, and there may be options if you are rooted/installed as a system app, but if you want something standard/mass applicable then I'm afraid you're out of luck.

Answer 2

use the following code public class CheckNetworkType extends Activity { private static final String tag = "CheckNetworkType";

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    TelephonyManager tm =  (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);        
    if(tm.getNetworkType() == TelephonyManager.NETWORK_TYPE_EDGE )
    {
        //  Network type is 2G
        Log.v(tag, "2G or GSM");
    }
    else 
    if(tm.getNetworkType() == TelephonyManager.NETWORK_TYPE_CDMA)
    {
        // Network type is 2G
        Log.v(tag, "2G or CDMA");
    }
    else
    if(tm.getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS)
    {
        // Network type is 3G
        Log.v(tag, "3G Network available.");
    }      
}

}