下载后图库不显示图像？ [英] Gallery does not show the image after download?

问题描述

我有以下代码将图片从网址保存到下载文件夹

I have following code to save image from url to Download folder

    var filename = url.replace(/^.*[\\\/]/, ''); 
    var filePath = cordova.file.externalRootDirectory + 'Download/' + filename;
    $cordovaFile.downloadFile(url, filePath, true, {})
        .then(function(result) {
          // Success!
          $cordovaToast.showShortCenter('This picture has been saved!');
        }, function(err) {
          $ionicPopup.alert({ title: 'Error!', template: angular.toJson(err) });
        });

成功保存图像。我可以浏览SD卡中的文件。但它在Gallery应用程序中不可见。当我搜索它时，我发现我们应该在该文件上运行一些媒体扫描程序。

It saves the image successfully. I can explore the file in the SD card. But it is not visible in Gallery app. When i search for it, i found that we should run some media scanner on that file.

我如何运行媒体扫描程序？有没有api？

How do i run media scanner? is there any api?

推荐答案

最后我找到了答案。在文件下载成功回调中运行媒体扫描程序。

Finally i found an answer. Run the media Scanner inside file download success callback.

 // Run media scanner to make it visible in Gallery app.
 cordova.exec(null, null, 'ScanMedia', 'mediaScanner', [result.nativeURL]);

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