android监控sim卡有没有服务示例(sim卡管理)

//取消监听
private void unregisterPhoneListener() {
mSub = MSimTelephonyManager.getDefault().getPhoneCount();
for (int i = 0; i < mSub; i++) {
if(mPhoneStateListener[i] != null){
mPhone.listen(mPhoneStateListener[i], PhoneStateListener.LISTEN_NONE);
}
}
}
}