为什么Wearable.dataapi.getFDforAsset生成状态为4005（资产不可用）的结果？

Question

    public void onDataChanged(DataEventBuffer dataEvents) {
    LOGD(TAG, "XXXX MainActivity.onDataChanged()");

    final List<DataEvent> events = FreezableUtils.freezeIterable(dataEvents);
    dataEvents.close();

    LOGD(TAG, "onDataChanged data event count=" + events.size());
    for (DataEvent event : events) {
        if (event.getType() == DataEvent.TYPE_CHANGED) {
            String path = event.getDataItem().getUri().getPath();
            if (IMAGE_PATH.equals(path)) {
                DataMapItem dataMapItem = DataMapItem.fromDataItem(event.getDataItem());
                LOGD(TAG, "onDataChanged getting image asset");
                Asset photo = dataMapItem.getDataMap()
                        .getAsset(IMAGE_KEY);
                LOGD(TAG, "onDataChanged photo asset="+photo);
                final String toi_name = dataMapItem.getDataMap().getString(GYBO_NAME);
                final String toi_info = dataMapItem.getDataMap().getString(GYBO_INFO);
                current_toi_name = toi_name;
                current_toi_info = toi_info;
                LOGD(TAG, "onDataChanged TOI name="+toi_name);
                LOGD(TAG, "onDataChanged TOI info="+toi_info);
                Bitmap bitmap = loadBitmapFromAsset(google_api_client, photo);

    private Bitmap loadBitmapFromAsset(GoogleApiClient apiClient, Asset asset) {
    if (asset == null) {
        throw new IllegalArgumentException("XXXX Asset must be non-null");
    }

    DataApi.GetFdForAssetResult result = Wearable.DataApi.getFdForAsset(
            apiClient, asset).await();
    if (result == null) {
        Log.w(TAG, "XXXX getFdForAsset returned null");
        return null;
    }

    if (result.getStatus().isSuccess()) {
        Log.d(TAG, "XXXX loadBitmapFromAsset getFdForAsset was successful");
    } else {
        Log.d(TAG, "XXXX loadBitmapFromAsset getFdForAsset was not successful. Error="+result.getStatus().getStatusCode()+":"+result.getStatus().getStatusMessage());
        // Seeing status code 4005 here which means Asset Unavailable
    }

    InputStream assetInputStream = result.getInputStream();
    if (assetInputStream == null) {
        Log.w(TAG, "XXXX Requested an unknown Asset");
        result.release();
        return null;
    }
    result.release();
    return BitmapFactory.decodeStream(assetInputStream);
}

Answer 1

    private static Asset createAssetFromBitmap(String imagePath) throws FileNotFoundException {
        // creating from Uri doesn't work: gives a ASSET_UNAVAILABLE error
        //return Asset.createFromUri(Uri.parse(imagePath));

        final File file = new File(imagePath);    
        final ParcelFileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);

        return Asset.createFromFd(fd);
    }