如何检查Android卡中是否有Sim卡？

Question

我需要帮助检查设备是否以编程方式使用SIM卡。请提供示例代码。

Answer 1

使用TelephonyManager。

http://developer.android.com/reference/android/telephony/TelephonyManager.html

正如Falmarri所说，你 希望首先使用 getPhoneType ，看看你是否在处理GSM手机。如果是，那么您也可以获得SIM状态。

TelephonyManager telMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
    int simState = telMgr.getSimState();
            switch (simState) {
                case TelephonyManager.SIM_STATE_ABSENT:
                    // do something
                    break;
                case TelephonyManager.SIM_STATE_NETWORK_LOCKED:
                    // do something
                    break;
                case TelephonyManager.SIM_STATE_PIN_REQUIRED:
                    // do something
                    break;
                case TelephonyManager.SIM_STATE_PUK_REQUIRED:
                    // do something
                    break;
                case TelephonyManager.SIM_STATE_READY:
                    // do something
                    break;
                case TelephonyManager.SIM_STATE_UNKNOWN:
                    // do something
                    break;
            }

---

修改

从API 26（ Android O Preview ）开始，您可以使用getSimState(int slotIndex)查询SimState以查找单个SIM卡插槽，即：

int simStateMain = telMgr.getSimState(0);
int simStateSecond = telMgr.getSimState(1);

official documentation

如果您正在使用旧版api进行开发，则可以使用TelephonyManager's

String getDeviceId (int slotIndex)
//returns null if device ID is not available. ie. query slotIndex 1 in a single sim device

int devIdSecond = telMgr.getDeviceId(1);

//if(devIdSecond == null)
// no second sim slot available

在API 23中添加 - 文档here

Answer 2

您可以查看以下代码：

SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, null, null);

Answer 3

找到了另一种方法。

public static boolean isSimStateReadyorNotReady() {
        int simSlotCount = sSlotCount;
        String simStates = SystemProperties.get("gsm.sim.state", "");
        if (simStates != null) {
            String[] slotState = simStates.split(",");
            int simSlot = 0;
            while (simSlot < simSlotCount && slotState.length > simSlot) {
                String simSlotState = slotState[simSlot];
                Log.d("MultiSimUtils", "isSimStateReadyorNotReady() : simSlot = " + simSlot + ", simState = " + simSlotState);
                if (simSlotState.equalsIgnoreCase("READY") || simSlotState.equalsIgnoreCase("NOT_READY")) {
                    return true;
                }
                simSlot++;
            }
        }
        return false;
    }

Answer 4

感谢@Arun kumar 的回答，kotlin 版本如下

fun isSIMInserted(context: Context): Boolean {
    return TelephonyManager.SIM_STATE_ABSENT != (context.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager).simState
}