哪里有.net电子商务网站开发教程网站开发的技术

一、功能简介

需求：开机自动开始搜网并显示网络列表

那么就不能将相关类做成单例，不能将subId、phoneId等卡相关的属性作为UI、服务的全局变量。

二、流程设计

NetworkSelectReceiver：监听开机广播，触发拉起搜网服务

NetworkOperatorService：搜网服务，完成后调起用户界面

NetworkOperatorList：网络模式列表，显示搜网结果

三、开发代码

（一）NetworkSelectReceiver

接收器配置 AndroidManifest.xml

        <receiverandroid:name=".settings.network.NetworkSelectReceiver"android:exported="true"><intent-filter><action android:name="android.intent.action.BOOT_COMPLETED" /><action android:name="android.intent.action.SIM_STATE_CHANGED" /></intent-filter></receiver>

内部逻辑

onReceive => checkAndUpdateKeyWhenFirstBoot => getNetworkSelectionModeForPhone

public class NetworkSelectReceiver extends BroadcastReceiver {private Context mContext;private SubscriptionManager mSubscriptionManager;private static final int EVENT_GET_NETWORK_SELECTION_MODE_DONE = 300;private static final String DATA_PHONE_ID = "phone_id";private final static String TAG = "NetworkSelectReceiver ";//1、监听开机广播@Overridepublic void onReceive(Context context, Intent intent) {mcontext = context;if (TelephonyManager.getDefault().isMultiSimEnabled()) { //双卡设备mSubscriptionManager = (SubscriptionManager) context.getSystemService(Context.TELEPHONY_SUBSCRIPTION_SERVICE);List<SubscriptionInfo> mSubscriptionInfoList = mSubscriptionManager.getActiveSubscriptionInfoList();int phoneCount = TelephonyManager.getDefault().getPhoneCount();if (mSubscriptionInfoList == null) {Log.d(TAG, "onReceive, no ActiveSubscriptionInfoList, phoneCount = " + phoneCount);return ;} else {Log.d(TAG, "onReceive, mSubscriptionInfoList = " + mSubscriptionInfoList + ", phoneCount = " + phoneCount);}//遍历并操作每一张卡。for (int i = 0; i < phoneCount; i++) {if (SubscriptionManager.isValidPhoneId(i)) {Log.d(TAG,"onReceive, isValidPhoneId = " + i);checkAndUpdateKeyWhenFirstBoot(context, i);}}} else {}//单卡逻辑}  //onReceive//2、场景校验（根据需求添加）private boolean checkAndUpdateKeyWhenFirstBoot(Context context, int phoneId) {Log.d(TAG,"checkAndUpdateKeyWhenFirstBoot, phoneId = " + phoneId);SharedPreferences prefs = ShowNetworkUtils.getSharedPreferences(context);String simKey = NetworkUtils.KEY_FIRST_BOOT + phoneId;//没有用到卡信息，此处用于debug，确认双卡是否正常TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);String mccmnc = "";if (tm == null) {return false;} else {mccmnc = tm.getSimOperatorNumericForPhone(phoneId);}int simState = tm.getSimState(phoneId);Log.d(TAG,"checkAndUpdateKeyWhenFirstBoot, simState = " + simState + ", mccmnc =" + mccmnc);//卡没加载好以及飞行模式下不发起搜网boolean isEnabled = (Settings.Glob