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POjava.lang.String cannot be converted to JSON object
 

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  1. POjava.lang.String cannot be converted to JSON object
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    <p>my Downloader.java file is</p> <pre><code>package com.phonegap.plugins.downloader; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.util.Log; import com.phonegap.api.Plugin; import com.phonegap.api.PluginResult; public class Downloader extends Plugin { @Override public PluginResult execute(String action, JSONArray args, String callbackId) { if (!action.equals("downloadFile")) return new PluginResult(PluginResult.Status.INVALID_ACTION); try { String fileUrl = args.getString(0); JSONObject params = args.getJSONObject(1); String fileName = params.has("fileName") ? params.getString("fileName"): fileUrl.substring(fileUrl.lastIndexOf("/")+1); String dirName = params.has("dirName") ? params.getString("dirName"): "sdcard/download"; Boolean overwrite = params.has("overwrite") ? params.getBoolean("overwrite") : false; return this.downloadUrl(fileUrl, dirName, fileName, overwrite, callbackId); } catch (JSONException e) { e.printStackTrace(); return new PluginResult(PluginResult.Status.JSON_EXCEPTION, e.getMessage()); } catch (InterruptedException e) { e.printStackTrace(); return new PluginResult(PluginResult.Status.ERROR, e.getMessage()); } } private PluginResult downloadUrl(String fileUrl, String dirName, String fileName, Boolean overwrite, String callbackId) throws InterruptedException, JSONException { try { Log.d("PhoneGapLog", "Downloading "+fileUrl + " into " + dirName + "/" + fileName); File dir = new File(dirName); if (!dir.exists()) { Log.d("PhoneGapLog", "directory " + dirName + " created"); dir.mkdirs(); } File file = new File(dirName, fileName); if (!overwrite &amp;&amp; file.exists()) { Log.d("DownloaderPlugin", "File already exist"); JSONObject obj = new JSONObject(); obj.put("status", 1); obj.put("total", 0); obj.put("file", fileName); obj.put("progress", 100); return new PluginResult(PluginResult.Status.OK, obj); } URL url = new URL(fileUrl); HttpURLConnection ucon = (HttpURLConnection) url.openConnection(); ucon.setRequestMethod("GET"); ucon.setDoOutput(true); ucon.connect(); Log.d("PhoneGapLog", "Download start"); InputStream is = ucon.getInputStream(); byte[] buffer = new byte[1024]; int readed = 0, progress = 0, totalReaded = 0, fileSize = ucon.getContentLength(); FileOutputStream fos = new FileOutputStream(file); while ((readed = is.read(buffer)) &gt; 0) { fos.write(buffer, 0, readed); totalReaded += readed; int newProgress = (int) (totalReaded*100/fileSize); if (newProgress != progress) progress = informProgress(fileSize, newProgress, fileName, callbackId); } fos.close(); Log.d("PhoneGapLog", "Download finished"); JSONObject obj = new JSONObject(); obj.put("status", 1); obj.put("total", fileSize); obj.put("file", fileName); obj.put("progress", progress); return new PluginResult(PluginResult.Status.OK, obj); } catch (FileNotFoundException e) { Log.d("PhoneGapLog", "File Not Found: " + e); return new PluginResult(PluginResult.Status.ERROR, 404); } catch (IOException e) { Log.d("PhoneGapLog", "Error: " + e); return new PluginResult(PluginResult.Status.ERROR, e.getMessage()); } } private int informProgress(int fileSize, int progress, String fileName, String callbackId) throws InterruptedException, JSONException { JSONObject obj = new JSONObject(); obj.put("status", 0); obj.put("total", fileSize); obj.put("file", fileName); obj.put("progress", progress); PluginResult res = new PluginResult(PluginResult.Status.OK, obj); res.setKeepCallback(true); success(res, callbackId); //Give a chance for the progress to be sent to javascript Thread.sleep(100); return progress; } } </code></pre> <p>my downloader.js file is</p> <pre><code>function Downloader() {} Downloader.prototype.downloadFile = function(fileUrl,dirName,fileName,overwrite,win,fail) { //Make params hash optional. if (!fail) win = params; PhoneGap.exec(win, fail, "Downloader", "downloadFile", [fileUrl, dirName,fileName,overwrite]); }; PhoneGap.addConstructor(function() { PhoneGap.addPlugin("downloader", new Downloader()); PluginManager.addService("Downloader", "com.phonegap.plugins.downloader.Downloader"); }); </code></pre> <p>and main.js file is</p> <pre><code>function downloadfile() { window.plugins.downloader.downloadFile("c:/Users/460725/Desktop/NIACustomerPhase.pdf","sdcard/cache/","NIACustomerPhase.pdf", false, function(data){ if(data=="exist"){ alert("File already exist"); } else{ alert("File saved on sd card") } },function(data){ alert("error: "+data); }); } </code></pre> <p>I have this integrated into android phonegap project.But when i run the project , I get Ale rt Error:Value sdcard/cache/ at 1 of type java.lang.String cannot be converted to JSON object a Can anyone tell what could be the problem..Thanks in advance..</p> <hr> <p>I have replaced the same code with previous and also changed the url.Now my main.js file is </p> <pre><code>function downloadfile () { window.plugins.downloader.downloadFile("http://www.toforge.com/archive.zip","sdcard/cache/","archive.zip", false, function(data){ if(data=="exist"){ alert("File already exist"); } else{ alert("File saved on sd card"); } },function(data){ alert("error: "+data); }); } </code></pre> <p>now i am getting an error alert when i am clicking on download file link <strong>unable to resolve host "www.toforge.com": No address associated with host name</strong> can anybody help me to resolve this error?? thanks in advance..</p>
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    1. USBill the Lizard
    1. USEkta Shukla
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    2. VO
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    1. COtry to capture the string which you are trying to convert into JSONObject and check whether its valid json or not with http://jsonlint.com/
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      1. POjava.lang.String cannot be converted to JSON object
      1. USAkram
    2. COUse `Log.v(String, String)` to debug the issue... that is, litter your code with logs and check to make sure the correct output is being written to the logcat at each step in the process.
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      1. POjava.lang.String cannot be converted to JSON object
      1. USAlex Lockwood
 

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