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POUpload or Download from/to ftp server: Android Client
 

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    <p>I'm working on android project to test FTP functions both upload or download files. Here's my first try code based on <a href="http://www.jibble.org/simpleftp/" rel="nofollow">this</a> tutorial:</p> <pre><code>public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); try { SimpleFTP ftp = new SimpleFTP(); // Connect to an FTP server on port 21. ftp.connect("ftp.olympe-network.com", 21, "username", "password"); // Set binary mode. ftp.bin(); // Change to a new working directory on the FTP server. ftp.cwd("web"); // Upload some files. ftp.stor(new File("shirt.jpg")); //ftp.stor(new File("comicbot-latest.png")); // You can also upload from an InputStream, e.g. ftp.stor(new FileInputStream(new File("shirt.jpg")), "shirt.jpg"); /*ftp.stor(someSocket.getInputStream(), "blah.dat"); */ // Quit from the FTP server. ftp.disconnect(); } catch (IOException e) { // Jibble. } } </code></pre> <p>My shirt.jpg file is store in the main project folder.i am using emulator not a physical device. I didn't have error in my log, but the file is not uploaded.</p> <p>Then, i changed to another approach:</p> <pre><code>private void loadLogs() { //radBtn.addView(null); new processTask().execute(); } private class processTask extends AsyncTask&lt;String, Void, Void&gt;{ private ProgressDialog Dialog = new ProgressDialog(activitiMain.this); private TextView log; private Spinner s; protected void onPreExecute() { Dialog.setMessage("Loading..."); Dialog.show(); } @Override protected Void doInBackground(String... arg0) { FTPClient client = new FTPClient(); try { SharedPreferences myPref = PreferenceManager.getDefaultSharedPreferences(getBaseContext()); String ipaddr = myPref.getString("etServer", ""); String port= myPref.getString("port", "21"); String logFile= myPref.getString("logfname", "error_log"); String filePath= myPref.getString("path", "/public_html"); String uname= myPref.getString("uname", ""); String pass= myPref.getString("pass", ""); client.connect(ipaddr,21); client.enterLocalPassiveMode(); boolean login = client.login(uname, pass); client.changeWorkingDirectory(filePath); System.out.println(client.printWorkingDirectory()); BufferedReader reader = null; String line = null; sv = new ScrollView(activitiMain.this); sv.setLayoutParams(LP_FF); LinearLayout loglay = new LinearLayout(activitiMain.this); loglay.setOrientation( LinearLayout.VERTICAL ); //FTPFile[] ftpFiles = client.listFiles(); FTPFile[] ftpFiles = client.listFiles(); ArrayList&lt;String&gt; name = new ArrayList&lt;String&gt;(); ArrayAdapter &lt;CharSequence&gt; adapter =new ArrayAdapter &lt;CharSequence&gt; (getBaseContext(), android.R.layout.simple_spinner_item ); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); adapter.add("Select File");*/ //s = new (Spinner)findViewById(R.id.Spinner01); s = new Spinner(activitiMain.this); for (int i = 0; i &lt; ftpFiles.length; i++) { String fname =ftpFiles[i].getName(); Log.i("FTP", "File " +i +" : "+fname); name.add(fname); long length = ftpFiles[i].getSize(); //adapter2.add(ftpFiles[i].getName()); //String readableLength = FileUtils.byteCountToDisplaySize( length ); ///System.out.println( name + ":\t\t" + readableLength ); } //String [] strArray =null; //strArray.toArray(name); String [] files = name.toArray(new String[name.size()]); @SuppressWarnings("unchecked") ArrayAdapter&lt;Object&gt; adapter2 = new ArrayAdapter&lt;Object&gt;(getApplicationContext(), android.R.layout.simple_spinner_item,files); adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s.setAdapter(adapter2); loglay.addView(s); Log.i("Files", ftpFiles.toString()); for (FTPFile ftpFile : ftpFiles) { String fileName = ftpFile.getName(); if (fileName.equals(logFile)){ try { InputStream stream = client.retrieveFileStream(fileName); reader = new BufferedReader(new InputStreamReader(stream, "UTF-8")); //line = reader.readLine(); while ((line = reader.readLine())!= null &amp;&amp; line.trim().length()&gt;0) { //System.out.println(line); log = new TextView(activitiMain.this); String trail = line; log.setTextColor(Color.GREEN); log.setPadding(10, 5, 0, 5); log.setText(trail); loglay.addView(log); } sv.addView(loglay); } finally { if (reader != null) try { reader.close(); } catch (IOException logOrIgnore) {} } } } client.logout(); } catch (IOException e) { e.printStackTrace(); } finally { try { client.disconnect(); } catch (IOException e) { e.printStackTrace(); } } return null; } protected void onPostExecute(Void unused) { Dialog.dismiss(); setContentView(sv); } </code></pre> <p>In my preference screen, i specified the ftp server parameters, but i got also an error in my logcat:</p> <pre><code> 05-27 18:36:38.237: ERROR/AndroidRuntime(585): FATAL EXCEPTION: main 05-27 18:36:38.237: ERROR/AndroidRuntime(585): java.lang.NullPointerException 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.view.ViewGroup.addViewInner(ViewGroup.java:1969) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.view.ViewGroup.addView(ViewGroup.java:1865) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.view.ViewGroup.addView(ViewGroup.java:1845) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:217) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.app.Activity.setContentView(Activity.java:1658) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at com.sam.remote.activitiMain$processTask.onPostExecute(activitiMain.java:160) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at com.sam.remote.activitiMain$processTask.onPostExecute(activitiMain.java:1) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.os.AsyncTask.finish(AsyncTask.java:417) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.os.AsyncTask.access$300(AsyncTask.java:127) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.os.Handler.dispatchMessage(Handler.java:99) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.os.Looper.loop(Looper.java:123) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at android.app.ActivityThread.main(ActivityThread.java:4627) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at java.lang.reflect.Method.invokeNative(Native Method) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at java.lang.reflect.Method.invoke(Method.java:521) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 05-27 18:36:38.237: ERROR/AndroidRuntime(585): at dalvik.system.NativeStart.main(Native Method) </code></pre>
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