2

我正在开发 android 项目来测试上传或下载文件的 FTP 功能。这是我基于教程的第一次尝试代码:

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.
    }
}

我的 shirt.jpg 文件存储在主项目文件夹中。我使用的是模拟器而不是物理设备。我的日志中没有错误,但文件没有上传。

然后,我改用另一种方法:

private void loadLogs() {
    //radBtn.addView(null);
    new processTask().execute();
}
private class processTask extends AsyncTask<String, Void, Void>{
    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<String> name = new ArrayList<String>();                              
        ArrayAdapter <CharSequence> adapter =new ArrayAdapter <CharSequence> (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 < 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<Object> adapter2 = new ArrayAdapter<Object>(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 && line.trim().length()>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);
        }

在我的首选项屏幕中,我指定了 ftp 服务器参数,但我的 logcat 中也出现错误:

    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)
4

2 回答 2

0

当您说您的文件 shirt.jpg 存储在您的主项目文件夹中时,在这里查看您的第一次尝试,我认为您的代码不会发现一旦部署到设备上,您可能必须手动将该文件存储在此处解释的设备:

http://developer.android.com/guide/topics/data/data-storage.html#filesInternal

或者您可以先将 shirt.jpg 文件(通过 ADP)上传到您的应用程序共享目录,如下所述:

http://developer.android.com/guide/topics/data/data-storage.html#filesExternal

然后尝试阅读并通过 FTP 访问它。

哦,是的,我在 Android 上保存文件然后通过电子邮件发送它们的经验,使用实际设备进行测试,因为模拟器不为您提供所需的网络连接。

于 2012-05-27T20:32:38.350 回答
-1

哪一行发生了异常?双击错误消息并尝试再次调试/发布

于 2012-05-27T20:23:48.103 回答