android - 执行完成后关闭 Realm 实例

Question

我想在执行完成后在 executeTransactionAsync 中关闭我的 Realm 实例。原因是我的应用程序主线程一直卡住，我认为原因是后台 Realm 实例在执行完成后没有关闭。请参阅下面的代码:

realm.executeTransactionAsync(new Realm.Transaction() {
                    @Override
                    public void execute(Realm realm) {
                        // Execute realm code
                        realm.copyToRealmOrUpdate(myData);
                        // Can I close the realm instance here without getting an 
                        // error? realm.close(); causes an error.
                    }
                }, new Realm.Transaction.OnSuccess() {
                    @Override
                    public void onSuccess() {
                        Log.i("CB", "success");
                        // looks like I cannot access the execute Realm 
                        // instance here.
                        // Closing realm.getDefaultInstance does not change my issue
                    }
                }, new Realm.Transaction.OnError() {
                    @Override
                    public void onError(Throwable error) {
                        Log.i("CB", "error - " + error.getMessage());
                    }
                });
            }

请看我的评论。我的应用程序屏幕变黑了。执行成功完成并调用 onSuccess()，但我无法从此处访问 execute Realm 实例以将其关闭。

关于我可以尝试什么，您有什么建议吗？我做错了什么吗？

提前谢谢你。

编辑

07-19 11:43:42.379 8146-8146/com.shortterminsurance.shortterm I/CB: success
07-19 11:43:43.258 8146-8152/com.shortterminsurance.shortterm W/art: Suspending all threads took: 33.234ms
07-19 11:43:43.266 8146-8156/com.shortterminsurance.shortterm I/art: Background partial concurrent mark sweep GC freed 476307(17MB) AllocSpace objects, 512(10MB) LOS objects, 40% free, 33MB/55MB, paused 7.261ms total 163.497ms
07-19 11:43:44.131 8146-8156/com.shortterminsurance.shortterm I/art: Background sticky concurrent mark sweep GC freed 408160(9MB) AllocSpace objects, 459(15MB) LOS objects, 35% free, 35MB/55MB, paused 10.287ms total 147.823ms
07-19 11:43:44.834 8146-8152/com.shortterminsurance.shortterm W/art: Suspending all threads took: 103.676ms
07-19 11:43:44.848 8146-8156/com.shortterminsurance.shortterm W/art: Suspending all threads took: 13.424ms

这是我的 onSuccess 被调用后的 logcat。我认为 execute 中的 realm 后台实例由于某种原因一直在运行:(。

Answer 1

此处传递的 Realm 实例

@Override
public void execute(Realm realm) {

为您关闭。您不必担心自己关闭它。

如果您查看 Realm.executeTransactionAsync() 的源代码，您可以找到

bgRealm.beginTransaction();
try {
    transaction.execute(bgRealm);

    if (!Thread.currentThread().isInterrupted()) {
        bgRealm.commitTransaction(false, new Runnable() {
            @Override
            public void run() {
                // The bgRealm needs to be closed before post event to caller's handler to avoid
                // concurrency problem. eg.: User wants to delete Realm in the callbacks.
                // This will close Realm before sending REALM_CHANGED.
                bgRealm.close();
            }
        });
        transactionCommitted = true;
    }
}
...

因此，首先它会在您的事务上调用 .execute()，然后关闭它传递给您的 Realm 实例。