android cellular data enable or prefer / Android M版本设置数据主卡的流程

最新推荐文章于 2022-12-12 11:57:44 发布

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在Android M版本中，默认主卡数据网络的设置涉及多个组件和步骤。首先，通过ServiceManager获取"isub"服务，接着使用DcTracker打开数据网络。设置默认子ID的关键在于SubscriptionController的setDefaultSubId方法，更新数据库MULTI_SIM_DATA_CALL_SUBSCRIPTION，并广播变化。然后，SubscriptionMonitor监听默认数据订阅变化，注册接收器并触发请求网络的流程，涉及DcTracker的requestNetwork方法来启用APN。

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默认主卡数据网络：

        final SubscriptionManager subscriptionManager = SubscriptionManager.from(context);
        subscriptionManager.setDefaultDataSubId(subId);

ServiceManager.getService("isub")

/**
 * SubscriptionController to provide an inter-process communication to
 * access Sms in Icc.
 *
 * Any setters which take subId, slotId or phoneId as a parameter will throw an exception if the
 * parameter equals the corresponding INVALID_XXX_ID or DEFAULT_XXX_ID.
 *
 * All getters will lookup the corresponding default if the parameter is DEFAULT_XXX_ID. Ie calling
 * getPhoneId(DEFAULT_SUB_ID) will return the same as getPhoneId(getDefaultSubId()).
 *
 * Finally, any getters which perform the mapping between subscriptions, slots and phones will
 * return the corresponding INVALID_XXX_ID if the parameter is INVALID_XXX_ID. All other getters
 * will fail and return the appropriate error value. Ie calling getSlotId(INVALID_SUBSCRIPTION_ID)
 * will return INVALID_SLOT_ID and calling getSubInfoForSubscriber(INVALID_SUBSCRIPTION_ID)
 * will return null.
 *
 */
public class SubscriptionController extends ISub.Stub {

DcTracker.java

    public void update() {
        log("update sub = " + mPhone.getSubId());
        log("update(): Active DDS, register for all events now!");
        onUpdateIcc();

        mDataEnabledSettings.setUserDataEnabled(getDataEnabled());
        mAutoAttachOnCreation.set(false);

        ((GsmCdmaPhone)mPhone).updateCurrentCarrierInProvider();
    }

打开数据网络：

mTelephonyManager.setDataEnabled(mSubId, enabled);

Context.TELEPHONY_SERVICE

/**
 * Implementation of the ITelephony interface.
 */
public class PhoneInterfaceManager extends ITelephony.Stub {}

GsmCdmaPhone.java

    @Override
    public void setDataEnabled(boolean enable) {
        mDcTracker.setDataEnabled(enable);
    }

DcTracker.java

 onTrySetupData(Phone.REASON_DATA_ENABLED);
                } else {
                    onCleanUpAllConnections(Phone.REASON_DATA_SPECIFIC_DISABLED);
                }
            }
        }
    }



    private void setupDataOnConnectableApns(String reason, RetryFailures retryFailures) {
        if (VDBG) log("setupDataOnConnectableApns: " + reason);

        if (DBG && !VDBG) {
            StringBuilder sb = new StringBuilder(120);
            for (ApnContext apnContext : mPrioritySortedApnContexts) {
                sb.append(apnContext.getApnType());
                sb.append(":[state=");
                sb.append(apnContext.getState());
                sb.append(",enabled=");
                sb.append(apnContext.isEnabled());
                sb.append("] ");
            }
            log("setupDataOnConnectableApns: " + reason + " " + sb);
        }

        for (ApnContext apnContext : mPrioritySortedApnContexts) {
            ArrayList<ApnSetting> waitingApns = null;

            if (VDBG) log("setupDataOnConnectableApns: apnContext " + apnContext);

            if (apnContext.getState() == DctConstants.State.FAILED
                    || apnContext.getState() == DctConstants.State.SCANNING) {
                if (retryFailures == RetryFailures.ALWAYS) {
                    apnContext.releaseDataConnection(reason);
                } else if (apnContext.isConcurrentVoiceAndDataAllowed() == false &&
                        mPhone.getServiceStateTracker().isConcurrentVoiceAndDataAllowed()) {
                    // RetryFailures.ONLY_ON_CHANGE - check if voice concurrency has changed
                    apnContext.releaseDataConnection(reason);
                } else {
                    // RetryFailures.ONLY_ON_CHANGE - check if the apns have changed
                    int radioTech = mPhone.getServiceState().getRilDataRadioTechnology();
                    ArrayList<ApnSetting> originalApns = apnContext.getWaitingApns();
                    if (originalApns != null && originalApns.isEmpty() == false) {
                        waitingApns = buildWaitingApns(apnContext.getApnType(), radioTech);
                        if (originalApns.size() != waitingApns.size() ||
                                originalApns.containsAll(waitingApns) == false) {
                            apnContext.releaseDataConnection(reason);
                        } else {
                            continue;
                        }
                    } else {
                        continue;
                    }
                }
            }
            if (apnContext.isConnectable()) {
                log("isConnectable() call trySetupData");
                apnContext.setReason(reason);
                trySetupData(apnContext, waitingApns);
            }
        }
    }

1、 SubscriptionController:setDefaultSubId
设置数据库MULTI_SIM_DATA_CALL_SUBSCRIPTION

broadcastDefaultDataSubIdChanged(subId);（ ITelephonyIntents.ACTION_DEFAULT_DATA_SUBSCRIPTION_CHANGED);）

2、 SubscriptionMonitor.java

mContext.registerReceiver(mDefaultDataSubscriptionChangedReceiver,
new IntentFilter(TelephonyIntents.ACTION_DEFAULT_DATA_SUBSCRIPTION_CHANGED));

registerForDefaultDataSubscriptionChanged

3、   TelephonyNetworkFactory.java
        mSubscriptionMonitor.registerForDefaultDataSubscriptionChanged(mPhoneId, mInternalHandler,
                EVENT_DEFAULT_SUBSCRIPTION_CHANGED, null);

onDefaultChange

applyRequests

mDcTracker.requestNetwork

4、 DcTracker.java
requestNetwork

onEnableApn