Java 试图弄清楚资源未能在我的Android应用程序中调用关闭警告

每次我测试我的应用程序时，我都会在我的logcat中收到一次此警告.

W A resource failed to call close.

我使用了在onCreate()方法中在线找到的以下代码来引发异常和堆栈跟踪，以找出导致异常的原因.

StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder(StrictMode.getVmPolicy()).detectLeakedClosableObjects().build());

这产生了以下堆栈跟踪.

StrictMode policy violation: android.os.strictmode.LeakedClosableViolation: A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.
    at android.os.StrictMode$AndroidCloseGuardReporter.report(StrictMode.java:1994)
    at dalvik.system.CloseGuard.warnIfOpen(CloseGuard.java:336)
    at java.io.FileInputStream.finalize(FileInputStream.java:508)
    at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:339)
    at java.lang.Daemons$FinalizerDaemon.processReference(Daemons.java:324)
    at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:300)
    at java.lang.Daemons$Daemon.run(Daemons.java:145)
    at java.lang.Thread.run(Thread.java:1012)
Caused by: java.lang.Throwable: Explicit termination method 'close' not called
    at dalvik.system.CloseGuard.openWithCallSite(CloseGuard.java:288)
    at dalvik.system.CloseGuard.open(CloseGuard.java:257)
    at java.io.FileInputStream.<init>(FileInputStream.java:176)
    at edu.cmu.pocketsphinx.Assets.getExternalItems(Assets.java:149)
    at edu.cmu.pocketsphinx.Assets.syncAssets(Assets.java:253)
    at com.example.atest.MainActivity$SetupTask.doInBackground(MainActivity.java:127)
    at com.example.atest.MainActivity$SetupTask.doInBackground(MainActivity.java:118)
    at android.os.AsyncTask$3.call(AsyncTask.java:394)
    at java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
    at java.lang.Thread.run(Thread.java:1012) 

我追溯到这个代码..

private static class SetupTask extends AsyncTask<Void, Void, Exception> {
        WeakReference<MainActivity> activityReference;
        SetupTask(MainActivity activity) {
            this.activityReference = new WeakReference<>(activity);
        }
        @Override
        protected Exception doInBackground(Void... params) {
            try {
                Assets assets = new Assets(activityReference.get());
                File assetDir = assets.syncAssets();
                activityReference.get().setupRecognizer(assetDir);
            } catch (IOException e) {
                return e;
            }
            return null;
        }
        @Override
        protected void onPostExecute(Exception result) {
            if (result != null) {
                ((TextView) activityReference.get().findViewById(R.id.status_text)).setText(R.string.status_fail);
                Log.d(TAG, "SetupTask: Exception: " + result.getMessage());
                // TODO: decide what to do when there is an exception
            } else {
                Log.d(TAG, "SetupTask: startSearch()");
                activityReference.get().startSearch();
            }
        }
    }

这是我从pocketphinsx-android获得的代码. 设置Asset和语音识别器需要时间，因此他们建议在Asmat任务中执行，以防止主线程上丢失帧. 我可以做一些明显的事情来消除这个警告吗？ 我在下面测试了此代码的同步版本，并生成了相同的堆栈跟踪.

  try {
    Assets assets = new Assets(this);
    File assetDir = assets.syncAssets();
    setupRecognizer(assetDir);
    startSearch();
  } catch (IOException e) {
    Log.d(TAG, e.getMessage());
  }

我已经把它进一步钉在..

File assetDir = assets.syncAssets();

因为我把它改成了..

File assetDir = assets.getExternalDir()

而且我没有收到任何警告. 似乎是一个袖珍狮身电脑的问题.