5

我有一个运行良好的同步适配器。它不需要互联网连接，因为它需要将地址簿与另一个本地存储（我的应用程序）同步。当 Wifi 关闭且设备没有任何互联网连接时，Android 会在“帐户和同步”设置活动中禁用同步。

即使连接关闭，有没有办法让我的同步适配器保持打开状态？

4

5 回答 5

2

好吧，没有办法，SyncAdpater 框架在没有互联网连接的情况下将无法工作，因此最好将您的同步适配器重新实现为意图服务。

于 2016-05-27T07:22:36.233 回答
0

如果不修改 AOSP 或更改 ram 回答的设计，则无法实现此目的。

我的回答是针对那些愿意修改 AOSP 的人：

谷歌执行如下：

作业由 SyncManager.java 安排网络约束

final int networkType = syncOperation.isNotAllowedOnMetered() ?
                JobInfo.NETWORK_TYPE_UNMETERED : JobInfo.NETWORK_TYPE_ANY;

        JobInfo.Builder b = new JobInfo.Builder(syncOperation.jobId,
                new ComponentName(mContext, SyncJobService.class))
                .setExtras(syncOperation.toJobInfoExtras())
                .setRequiredNetworkType(networkType)
                .setPersisted(true)
                .setPriority(priority);

但是 NETWORK_TYPE_ANY 映射到 JobStatus.java 中的 CONSTRAINT_CONNECTIVITY

switch (job.getNetworkType()) {
    case JobInfo.NETWORK_TYPE_NONE:
        // No constraint.
        break;
    case JobInfo.NETWORK_TYPE_ANY:
        requiredConstraints |= CONSTRAINT_CONNECTIVITY;
        break;

有两种解决方案：

1.首先删除对互联网连接的检查，只检查常规连接

  diff --git a/services/core/java/com/android/server/job/controllers/ConnectivityController.java b/services/core/java/com/android/server/job/controllers/ConnectivityController.java
    index 4d5a920..6680c4e 100644
    --- a/services/core/java/com/android/server/job/controllers/ConnectivityController.java
    +++ b/services/core/java/com/android/server/job/controllers/ConnectivityController.java
    @@ -118,7 +118,8 @@ public final class ConnectivityController extends StateController implements
                     && !info.isRoaming();

             boolean changed = false;
    -        changed |= jobStatus.setConnectivityConstraintSatisfied(connectionUsable);
    +        //change to AOSP  : use connected instead of connectionUsable - since connection maybe considered usable within enterprise without NET_CAPABILITY_VALIDATED
    +        changed |= jobStatus.setConnectivityConstraintSatisfied(connected);
             changed |= jobStatus.setMeteredConstraintSatisfied(metered);
             changed |= jobStatus.setUnmeteredConstraintSatisfied(unmetered);
             changed |= jobStatus.setNotRoamingConstraintSatisfied(notRoaming);

2. 其次，您需要有条件地向 SyncManager.java 添加一个替代条件我添加了充电条件，因为我使用的自定义设备始终在充电 - 这可以更改为任何其他条件 - 但需要一个额外的条件。

diff --git a/services/core/java/com/android/server/content/SyncManager.java b/services/core/java/com/android/server/content/SyncManager.java
index 205e828..81f9a8c 100644
--- a/services/core/java/com/android/server/content/SyncManager.java
+++ b/services/core/java/com/android/server/content/SyncManager.java
@@ -1539,6 +1539,13 @@ public class SyncManager {
                 .setRequiredNetworkType(networkType)
                 .setPersisted(true)
                 .setPriority(priority);
+                
+        if (syncOperation.owningPackage.contains("com.example.yourcompany")) {
+           //Change to AOSP : Custom accounts need to sync wihout access to public internet
+           Slog.i(TAG, "set JobInfo.NETWORK_TYPE_NONE for "+syncOperation.target.toString());
+           b.setRequiredNetworkType(JobInfo.NETWORK_TYPE_NONE);
+           b.setRequiresCharging(true);
+       }

         if (syncOperation.isPeriodic) {
             b.setPeriodic(syncOperation.periodMillis, syncOperation.flexMillis);
于 2018-12-17T08:37:01.233 回答
-1

在调用之前添加额外的 SYNC_EXTRAS_MANUALrequestSync(account,authority, extras);

extras.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
ContentResolver.requestSync(account,authority, extras);
于 2012-08-14T06:39:15.240 回答
-1

在 SyncManager 中，当 account-type 是您的时，尝试将 mDataConnection 设置为 true。

于 2013-12-05T15:59:36.270 回答
-1 
 public static void requestManualSync(Account account, Bundle extras) {
   //Do your Stuff here...
}

将上述方法放入Syncadapter ..

于 2017-05-24T12:01:58.060 回答