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POHow to check file exist or not and if not create a new file in sdcard in async task
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  1. POHow to check file exist or not and if not create a new file in sdcard in async task
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    copied!<p>I want to download pdf from server and store on sdcard. I try something like following code but it will not go in else condition, as I am not created a file still it will giving MSG as file exist. Why is it so?? </p> <pre><code>String pdf; String filenameWithExtension=""; protected void onCreate(Bundle savedInstanceState) { Intent intent=getIntent(); pdf=intent.getStringExtra("pdfurl"); String PATH2 = Environment.getExternalStorageDirectory()+"/pictures"; Log.v("log_tag initial path", "PATH: " + PATH2); File file2 = new File(PATH2); if(file2.exists()==true) { }else { Log.v("directory is created", "new dir"); file2.mkdir(); } /**extracting the pdf filname from url**/ int slashIndex = pdf.lastIndexOf('/'); int dotIndex = pdf.lastIndexOf('.'); filenameWithExtension=pdf.substring(slashIndex + 1); DownloadFile downloadFile = new DownloadFile(filenameWithExtension); downloadFile.execute(pdf); } private class DownloadFile extends AsyncTask&lt;String, Integer, String&gt;{ String filename=""; public DownloadFile(String _filename) { this.filename=_filename; } String PATH = Environment.getExternalStorageDirectory()+"/pictures/"+filename; File filecheck=new File(PATH); @Override protected String doInBackground(String... str) { Log.v("name of file",this.filename); if(filecheck.exists()){ Log.v("in if condition", "file is alredy exist"); }else{ Log.v("in else condition","file not present...."); try { URL url = new URL(str[0]); HttpURLConnection c = (HttpURLConnection)url.openConnection(); c.setRequestMethod("GET"); c.setDoOutput(true); c.connect(); // this will be useful so that you can show a typical 0-100% progress bar int lenghtOfFile = c.getContentLength(); // downlod the file // InputStream input = new BufferedInputStream(url.openStream()); //OutputStream output = new FileOutputStream("/sdcard/somewhere/nameofthefile.ext"); String PATH = Environment.getExternalStorageDirectory()+ "/pictures/"; Log.v("log_tag", "PATH: " + PATH); File file = new File(PATH); Boolean check=filecheck.createNewFile(); Log.v("check file creation..::", check.toString()); if(file.mkdirs()==false) { Log.v("file is alredy exist in sdcard", "exist file"); }else { Log.v("file is created in card", "new dir"); file.mkdirs(); } File outputFile = new File(file,filenameWithExtension); FileOutputStream fos = new FileOutputStream(outputFile); InputStream is = c.getInputStream(); long total = 0; byte[] buffer = new byte[1024]; int len1 = 0; while ((len1 = is.read(buffer)) != -1) { total +=len1; publishProgress((int)(total*100/lenghtOfFile)); fos.write(buffer, 0, len1); } fos.close(); is.close(); } catch (IOException e) { Log.d("log_tag of background", "Error: " + e); } } Log.v("In aync task filename extension",filenameWithExtension); return filenameWithExtension; } </code></pre>
 

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