How to find out whether android device has cellular radio module?

Question

How can I find out for sure that device really has gsm, cdma or other cellular network equipment (not just WiFi)? I don\'t want to check current connected network state, bec

Answer 1

If you're publishing in the store, and you want to limit your application only being visible to actual phones, you could add a <uses-feature> into your manifest that asks for android.hardware.telephony. Check out if that works for you from the documentation.

Answer 2

Just in case somebody needs complete solution for this: Reflection is used because some things may not exist on some firmware versions. MainContext - main activity context.

    static public int getSDKVersion()
{
    Class<?> build_versionClass = null;

    try
    {
        build_versionClass = android.os.Build.VERSION.class;
    }
    catch (Exception e)
    {
    }

    int retval = -1;
    try
    {
        retval = (Integer) build_versionClass.getField("SDK_INT").get(build_versionClass);
    }
    catch (Exception e)
    {
    }

    if (retval == -1)
        retval = 3; //default 1.5

    return retval;
}

static public boolean hasTelephony()
{
    TelephonyManager tm = (TelephonyManager) Hub.MainContext.getSystemService(Context.TELEPHONY_SERVICE);
    if (tm == null)
        return false;

    //devices below are phones only
    if (Utils.getSDKVersion() < 5)
        return true;

    PackageManager pm = MainContext.getPackageManager();

    if (pm == null)
        return false;

    boolean retval = false;
    try
    {
        Class<?> [] parameters = new Class[1];
        parameters[0] = String.class;
        Method method = pm.getClass().getMethod("hasSystemFeature", parameters);
        Object [] parm = new Object[1];
        parm[0] = "android.hardware.telephony";
        Object retValue = method.invoke(pm, parm);
        if (retValue instanceof Boolean)
            retval = ((Boolean) retValue).booleanValue();
        else
            retval = false;
    }
    catch (Exception e)
    {
        retval = false;
    }

    return retval;
}