小编Jav*_*uez的帖子

我一直在改变Eclipse上数以千计的不同首选项,在Eclipse上调试时我仍然无法更改悬停窗口背景.这是一张黑色背景照片,我想将颜色更改为:http://img208.imageshack.us/img208/7126/blackbackgrounds.png先 谢谢.

我一直在生产应用程序中使用DownloadManager，没有问题，但是现在在Android Pie（API 28）中失败。请注意，下载被标记为失败并返回错误400。

@Override
public void onReceive(Context context, Intent intent) {
    long reference = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
    DownloadManager.Query query = new DownloadManager.Query();
    query.setFilterById(reference);
    DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
    Cursor cursor = downloadManager.query(query);
    cursor.moveToFirst();
    int statusIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS);
    int status = cursor.getInt(statusIndex);

    if (status == DownloadManager.STATUS_SUCCESSFUL) {
        int fileUriIndex = cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI);
        String savedFileUri = cursor.getString(fileUriIndex);

        ParcelFileDescriptor pfd = null;
        try {
            pfd = context.getContentResolver().openFileDescriptor(Uri.parse(savedFileUri), "r");
            PamplonaParkingXMLParser pamplonaParkingXMLParser = new PamplonaParkingXMLParser();
            ParkingList parkingList = pamplonaParkingXMLParser.parse(pfd);
            ObservableObject.getInstance().updateValue(parkingList);
            if (pfd != null) {
                pfd.close();
            } …