问题描述
我想禁用基于SIM卡的硬件是否是present或不是在我的应用程序中调用和短信相关的功能。现在，一个初学者对这种将使用被检查手机类型的方法：
I wanted to disable features related to CALL and SMS in my application based on whether SIM hardware is present or not. Now a beginners approach towards this will be checking the Phone type using :
if (telephonyManager1.getPhoneType() == TelephonyManager.PHONE_TYPE_NONE)
如果为真，那么它的支持。
If true then its supported.
一切都很好，直到我遇到了索尼Tablet S的它只有对数据和信息SIM卡的支持。没有语音支持。因此，对于这个设备，我需要禁用只有通话功能，但继续与短信支持。 索尼平板电脑返回TelephonyManager.PHONE_TYPE_NONE，所以我不能老是用上面的方法。此外，
Everything was fine until i came across Sony Tablet S which has a SIM support only for Data and Messaging. No voice support. So for this device i need to disable only CALL feature but continue with SMS support. Sony tablet returns TelephonyManager.PHONE_TYPE_NONE so i can`t use the above methods. Also ,
telephonyManager1.getSimState();
返回1，即SIM_STATE_ABSENT这也是以防HTC Flyer的这对SIM硬件本身不支持的一样。
returns 1 i.e SIM_STATE_ABSENT which is also same in case of HTC FLYER which has no support for SIM hardware itself.
那么，有什么办法，我可以来知道SIM卡的硬件有没有（无论插入或SIM卡）？
So is there any way in which i can come to know if SIM hardware is there(irrespective of SIM card inserted or not) ?
推荐答案
使用
PackageManager pm = this.getPackageManager();
boolean hasTelephony=pm.hasSystemFeature(PackageManager.FEATURE_TELEPHONY);
编辑：
尝试使用
TelephonyManager.getLine1Number()
如果返回null，那么你不会有电话功能。没有尝试过。给它一个镜头
If this returns null then you wont have telephony feature. Have not tried. give it a shot
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