Android Realm ChangeListener没有被触发 [英] Android Realm ChangeListener not being triggered

问题描述

我有一个Realm结果更改侦听器，它没有被触发，这是代码:

I've got a Realm results change listener that isn't being triggered, here's the code:

final RealmResults<LogEntry> entries = realm.where(LogEntry.class).findAll();

entries.addChangeListener(new RealmChangeListener<RealmResults<LogEntry>>() {
            @Override
            public void onChange(RealmResults<LogEntry> results) {
                Log.v("Testing", "The size is: " + results.size());
            }
        });

肯定添加了新的东西，我在域插入日志中打印出了表的新大小，但是由于某种原因，更改侦听器什么也不做?我在这里丢失了什么吗?似乎与文档相同.

There is definitely new stuff being added, I have a log on the realm insertion printing out the new size of the table, yet for some reason the change listener does nothing? Am I missing something here, it seems identical to the docs.

推荐答案

您需要保留对entries的类引用，以防止被GC使用:

You need to keep a class reference to entries to prevent it from being GC'ed:

public MyClass {

  private RealmResults<LogEntry> entries;

  public void myMethod() {

    entries = realm.where(LogEntry.class).findAll();
    entries.addChangeListener(new RealmChangeListener<RealmResults<LogEntry>>() {
            @Override
            public void onChange(RealmResults<LogEntry> results) {
                Log.v("Testing", "The size is: " + results.size());
            }
        });
    }
}

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