android监控sim卡有没有服务示例(sim卡管理)

public class uniteqservice {
public static final string log_tag = "uniteqservice";
public boolean debug = true;
private boolean hasservice = false;//是否有服务
private phonestatelistener[] mphonestatelistener;//监听双卡
private telephonymanager mphone;

//监听类
private phonestatelistener getphonestatelistener(final int sub) {
phonestatelistener sphonestatelistener = new phonestatelistener(sub) {
    @override
        public void onservicestatechanged(servicestate servicestate) {
            // todo auto-generated method stub
            if (servicestate != null) {
                if (servicestate.getstate() == servicestate.state_in_service) {
                    hasservice = true;
                } else {
                    hasservice = false;
                }
            } else {
                if (debug) log.d(tag, "no service state...may be the balance is not enough" + sub);
            }
            super.onservicestatechanged(servicestate);
        }
      };
    return sphonestatelistener;
}
//注册监听
private void registerphonelistener() {
//获取卡号数,msimtelephonymanager 这个类api没有开放,可以通过编译源码
//得到frameworks.jar包并导入你的工程, 然后import android.telephony.msimtelephonymanager;
msub = msimtelephonymanager.getdefault().getphonecount();
mphonestatelistener = new phonestatelistener[msub];
for (int i = 0; i < msub; i++) {
mphonestatelistener[i] = getphonestatelistener(i);
mphone.listen(mphonestatelistener[i], phonestatelistener.listen_service_state);
}
}

//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);
}
}
}
}