Question

因此，我已使用DownloadManager使用以下代码从Internet下载文件：

public void DownloadFile()
    {
        Log.d("DownloadFileEntered", "true");

        try {
            String url = "https://firebasestorage.googleapis.com/v0/b/roti-bank-testing.appspot.com/o/SocialGallery%2Fsome.jpg?alt=media&token=d2ddd40f-0c04-441c-82b1-585fd8743b19";
            DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "somegif.gif");
            DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
            long d = manager.enqueue(request);


        }catch (Exception e)
        {
            Log.d("DownloadFileEntered", "Error."+e.toString());
        }
    }

现在说，我要删除此文件。为此，我使用了以下代码：

    File file = new File("file://" + Environment.DIRECTORY_DOWNLOADS + "/somegif.gif");
    boolean d = file.delete();
    Log.d("DownloadFileEntered", "D : "+d);

但是很显然，最后一个Log.d给出的输出为false，并且该文件也不会被删除。那么，从外部存储中删除文件的正确方法是什么？

还可以在下载完成后运行功能吗？如果是，那怎么办？

Answer 1

希望这对您有帮助：

add_filter('acf/load_field/name=chef', 'my_acf_load_chef_field');

function my_acf_load_chef_field( $field )
{    
    $user_fields = array( 'user_login');
    $argu = new WP_User_Query( array( 'role' => 'chef' , 'fields' => $user_fields ));
    $choices = $argu->get_results();
    //$choices = get_field($field['choices'], $post->ID , false);
    $field['choices'] = array();  
     if( is_array($choices) ) {
        $len = count($choices);
        for($i = 0; $i < $len; $i++) {
            array_push($field['choices'], ($choices[$i]->user_login));
    }
   }
    // var_dump($field['choices']);
    // exit;
    return $field;

不要忘记在manifest.xml中设置此权限：

File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/somegif.gif");
    boolean d = file.delete();
    Log.d("DownloadFileEntered", "D : "+d);

删除下载的文件android

1 个答案: