无论状态如何，Google Awareness API 中的 HeadphoneFence.unplugged 都会触发

Question

我正在使用 Nexus 5X 手机并试用 Google Awareness API HeadphoneFence.unplugged() https://developers.google.com/android/reference/com/google/android/gms/awareness/fence/HeadphoneFence

我发现第一次添加围栏时它会触发我的待处理意图，然后无论我插入或拔出耳机，它都会触发，即使它应该只在拔出时触发。

我的代码没有那么有趣，因为它直接来自指南。

Awareness.FenceApi.updateFences(
                                getGoogleApiClient(),
                                new FenceUpdateRequest.Builder()
                                        .addFence(
                                                "something",
                                                HeadphoneFence.unplugging();,
                                                createSendHeadphoneUnpluggedMessagePendingIntent(context))
                                        .build())
                                .setResultCallback(new ResultCallback<Status>() {
                                    @Override
                                    public void onResult(@NonNull Status status) {
                                        if(status.isSuccess()) {
                                            Log.i(TAG, "Headphone unplugged fence was successfully registered.");
                                        } else {
                                            Log.e(TAG, "Headphone unplugged fence could not be registered: " + status);
                                        }
                                    }
                                });

Answer 1

@Herman 看起来确实是这样。它会在应用程序启动时（注册围栏/接收器时）以及插入/拔出耳机时为您提供耳机的状态。

在某种程度上我猜是有道理的，如果连接了耳机，你并没有拔掉它们，因此它会触发 FenceState.FALSE，当你拔掉它们时，它会触发 FenceState.TRUE。但是，您可以选择对

中的所需事件采取行动

switch (fenceState.getCurrentState()) {
                case FenceState.TRUE:
                    Log.i(TAG, "Fence > Headphones plugged out");
                    break;
                case FenceState.FALSE:
                    Log.i(TAG, "Fence > Headphones are NOT plugged out.");
                    break;
                case FenceState.UNKNOWN:
                    Log.i(TAG, "Fence > The headphone fence is in an unknown state.");
                    break;
            }