Plumin
想获取当前使用流量的卡槽，怎么弄？
import android.telephony.SubscriptionManager;

subscriptionManager = context.getSystemService("telephony_subscription_service");
defaultDataSubId = SubscriptionManager.getDefaultDataSubscriptionId();

// 获取卡槽 0 和卡槽 1 的订阅信息
simSlot1Info = subscriptionManager.getActiveSubscriptionInfoForSimSlotIndex(0);
simSlot2Info = subscriptionManager.getActiveSubscriptionInfoForSimSlotIndex(1);

if (simSlot1Info != null && simSlot1Info.getSubscriptionId() == defaultDataSubId) {
    return true;
} else if (simSlot2Info != null && simSlot2Info.getSubscriptionId() == defaultDataSubId) {
    return false;
} else {
    return "未找到默认上网卡";
}
//卡一输出true，卡二输出false
 
 
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