我一直在尝试在我的应用程序中显示gsmSignalStrength()。以下代码用于检查sim是否存在
private boolean checkIfSimIsPresent() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
SubscriptionManager sManager = (SubscriptionManager) mContext.getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE);
SubscriptionInfo infoSim1 = sManager.getActiveSubscriptionInfoForSimSlotIndex(0);
SubscriptionInfo infoSim2 = sManager.getActiveSubscriptionInfoForSimSlotIndex(1);
if(infoSim1 != null || infoSim2 != null) {
return true;
}
} else {
TelephonyManager telephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
if (telephonyManager.getSimState() != TelephonyManager.SIM_STATE_ABSENT){
return true;
}
}
return false;
}
这段代码非常好。但在安卓棒棒糖5.0中,即使插入sim卡,第二个sim卡插槽也总是返回false。
有人面临过同样的问题吗?Android系统显示gsmStrength,但为什么Telephony Manager中的SIM_STATE_ABSENT返回false?
一般来说,Android系统如何显示正确的值。他们在内部听什么??
回答有点晚,但原因是Dualsim的东西是在API 22级中添加的,这是Android 5.1,你有Android 5.0,这是API 21级。请在此处查看详细信息:https://developer.android.com/reference/android/telephony/SubscriptionManager.html#getActiveSubscriptionInfoForSimSlotIndex(int)