SubscriptionManager.java 文件源码

private String getSubDisplayName(final SubscriptionInfo si) {
    if (si == null) {
        Context gbContext = getGbContext();
        return gbContext == null ? "Ask every time" :
            gbContext.getString(R.string.sm_voice_ask);
    } else {
        return si.getDisplayName() == null ?
            String.format(Locale.getDefault(), "SIM %d", (si.getSimSlotIndex()+1)) :
                si.getDisplayName().toString();
    }
}