從網址下載文件到科爾多瓦應用程序錯誤

Question

我正在製作一個應用程序，需要從我的網站下載圖像並將它們存儲在手機中，但是當我嘗試phonegap時會顯示所有可能發生的錯誤。我能做些什麼來糾正這個= /？

var fileTransfer = new FileTransfer(); 
fileTransfer.download(
    "http://developer.android.com/assets/images/home/ics-android.png", 
    "/", 
    function(entry) { 
     alert("download complete: " + entry.fullPath); 
    }, 
    function(error) { 
     alert("download error source " + error.source); 
     alert("download error target " + error.target); 
     alert("upload error code" + error.code); 
    }); 

顯示的錯誤是：

Download error source " the url used" 
download error target: " the target used " 
upload error code 1 

我用科爾多瓦2.2.0

這裏是logcat的錯誤日誌：

12-06 09:07:26.413: E/FileTransfer(2186): {"target":"\/","source":"http:\/\/developer.android.com\/assets\/images\/home\/ics-android.png","code":1} 
12-06 09:07:26.413: E/FileTransfer(2186): java.io.FileNotFoundException 
12-06 09:07:26.413: E/FileTransfer(2186): at org.apache.cordova.FileTransfer.getFileFromPath(FileTransfer.java:794) 
12-06 09:07:26.413: E/FileTransfer(2186): at org.apache.cordova.FileTransfer.access$700(FileTransfer.java:62) 
12-06 09:07:26.413: E/FileTransfer(2186): at org.apache.cordova.FileTransfer$4.run(FileTransfer.java:631) 
12-06 09:07:26.413: E/FileTransfer(2186): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 
12-06 09:07:26.413: E/FileTransfer(2186): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 
12-06 09:07:26.413: E/FileTransfer(2186): at java.lang.Thread.run(Thread.java:856) 

Answer 1

你是如此接近，這只是你的目標文件是錯誤的。請嘗試：

var fileTransfer = new FileTransfer(); 
fileTransfer.download(
    "http://developer.android.com/assets/images/home/ics-android.png", 
    "file://sdcard/ics-android.png", 
    function(entry) { 
     alert("download complete: " + entry.fullPath); 
    }, 
    function(error) { 
     alert("download error source " + error.source); 
     alert("download error target " + error.target); 
     alert("upload error code" + error.code); 
    }); 

您需要「file：//」前綴，並且由於您沒有權限而無法保存爲「/」。

Answer 2

我已經嘗試過，並在Android的這項工作，但我還沒有檢查在ios.And下載是成功的，因爲我在我的項目中使用它。

enter code here 
function fun(){ 
var dfd = $.Deferred(function (dfd){ 
var remoteFile = "Your link"; 
var localFileName = remoteFile.substring(remoteFile.lastIndexOf('/')+1); 
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSystem) { 
fileSystem.root.getFile(localFileName, {create: true, exclusive: false}, 
    function(fileEntry) { 
var localPath = fileEntry.fullPath; 
if (device.platform === "Android" && localPath.indexOf("file://") === 0) { 
      localPath = localPath.substring(7); 
      }// You need to write IOS instead of Android 

    var ft = new FileTransfer(); 
    ft.download(remoteFile, localPath, function(entry) { 
    dfd.resolve('file downloaded'); 
    // Do what you want with successful file downloaded and then 
    // call the method again to get the next file 
    //downloadFile(); 
      }, fail); 
      }, fail); 
      }, fail); 

      }); 
      return dfd.promise(); 

     } 
       fun().then(function(msg){ 
      if(msg==="file downloaded") 
      { 
      alert("Download complete"); 
      } 
      else 
      { 
      alert("Download error") 
      } 
      }); 
      function fail(){ 
      alert("error"); 
     }