How to get list of Files from SFTP Server in android?

Question

I developed a code but it doesn't work.please help me.

ChannelSftp sftpChannel = (ChannelSftp) channel;
                try {
                    Vector ls=sftpChannel.ls("/home/");
                    for(int i=0;i<ls.size();i++){

                    t.setText("\n"+ls.get(i)+"\n");


                    }

                } catch (SftpException e1) {
                    // TODO Auto-generated catch block
                }

Here is the Exception:

11-06 12:29:15.801: E/AndroidRuntime(9624): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4267)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.view.ViewRootImpl.invalidateChild(ViewRootImpl.java:855)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.view.ViewRootImpl.invalidateChildInParent(ViewRootImpl.java:904)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.view.ViewGroup.invalidateChild(ViewGroup.java:4005)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.view.View.invalidate(View.java:8716)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.view.View.invalidate(View.java:8667)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.widget.TextView.updateAfterEdit(TextView.java:6265)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.widget.TextView.handleTextChanged(TextView.java:7909)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.widget.TextView$ChangeWatcher.onTextChanged(TextView.java:8286)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.text.SpannableStringBuilder.sendTextChange(SpannableStringBuilder.java:892)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:352)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:266)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:443)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:257)
11-06 12:29:15.801: E/AndroidRuntime(9624):     at android.text.SpannableStringBuilder.append(SpannableStringBuilder.java:29)
11-06 12:29:41.941: W/IInputConnectionWrapper(9624): showStatusIcon on inactive InputConnection

Answer 1

You cannot modify the UI (t.setText()) from a background thread: e.g you can use post() method to execute a runnable in the UI thread if you are currently in a background thread.

Moreover in your code you are replacing the text of the field instead of appending a new line.

Try with the following code:

            ChannelSftp sftpChannel = (ChannelSftp) channel;
            try {
                Vector ls=sftpChannel.ls("/home/");
                String text = "";
                for(int i=0;i<ls.size();i++){
                    text += ls.get(i)+"\n";
                }
                t.post(new Runnable() {
                    public void run() {
                       t.setText(text);
                    }
                });
            } catch (SftpException e1) {
                // TODO Auto-generated catch block
            }

It would actually be better to display the results with a ListView. A quick (& dirty) example:

        listView.setAdapter(new BaseAdapter() {

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            TextView view = new TextView(parent.getContext());
            view.setText(((LsEntry)ls.get(i)).getFilename());
            return view;
        }

        @Override
        public int getCount() {
            return ls.size();
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

        @Override
        public Object getItem(int position) {
            return null;
        }
    });