判断手机SIM卡数量和指定卡拨号

//判断手机上有几个SIM卡
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP_MR1)
public static int getAvailableSimCardCount(Context context){
    int count = 0;
    SubscriptionManager mSubscriptionManager = SubscriptionManager.from(context);
    for(int i = 0; i < getSimCardCount(context); i++){
        SubscriptionInfo sir = mSubscriptionManager
                .getActiveSubscriptionInfoForSimSlotIndex(i);
        if(sir != null){
            count++;
        }
    }
    return count;
}
//判断手机上有几个SIM卡
public static int getSimCardCount(Context context) {
    TelephonyManager mTelephonyManager = (TelephonyManager) context
            .getSystemService(Context.TELEPHONY_SERVICE);
    Class cls = mTelephonyManager.getClass();
    try {
        Method mMethod = cls.getMethod("getSimCount");
        mMethod.setAccessible(true);
        return (int) mMethod.invoke(mTelephonyManager);
    } catch (NoSuchMethodException e) {
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
    return -1;
}

//指定SIM卡拨打
public static final String[] dualSimTypes = { "subscription", "Subscription",
        "com.android.phone.extra.slot",
        "phone", "com.android.phone.DialingMode",
        "simId", "simnum", "phone_type",
        "simSlot" };
private void call(String phone) {
    Intent callIntent = new Intent(Intent.ACTION_CALL)
            .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    callIntent.setData(Uri.parse("tel:" + phone));
    for (int i=0; i < dualSimTypes.length; i++) {
        callIntent.putExtra(dualSimTypes[i], 2);
    }
    this.startActivity(callIntent);
}