android filedialog 然后上传到服务器

Question

对于我的 Activity 我有两个按钮，一个是使用 FileDialog 选择一个文件，另一个是上传它。我的问题是从 FileDialog 获取文件的值。我只是在我的 FileDialog 方法中使用 toast，这样我就可以看到正在选择的文件名。我正在使用这个作为参考 click here. 如何获取文件名和文件路径，然后将其放入字符串变量中。你能帮我做这些吗？不好意思我是新手

FileDialog 方法

public static void openDialogToUploadFile(final Activity activity,final Context context) {

    File mPath = new File(Environment.getExternalStorageDirectory() + "//DIR//");

    FileDialog fileDialog = new FileDialog(activity, mPath);
    fileDialog.setFileEndsWith(".txt");

    fileDialog.addFileListener(new FileDialog.FileSelectedListener() {

        @Override
        public void fileSelected(File file) {
            Toast.makeText(context, "File: "+file, Toast.LENGTH_SHORT).show();
        }
    });
    fileDialog.showDialog();
}

在这里，我希望 uploadFileName 和 uploadFilePath 的值来自 FileDialog 方法。我怎样才能做到这一点？

引用Class:

UploadToServer.java

public class UploadToServer extends Activity {

    TextView messageText;
    Button uploadButton;
    int serverResponseCode = 0;
    ProgressDialog dialog = null;

    String upLoadServerUri = null;

    /**********  File Path *************/
    final String uploadFilePath = "/mnt/sdcard/";
    final String uploadFileName = "service_lifecycle.png";

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_upload_to_server);

        uploadButton = (Button)findViewById(R.id.uploadButton);
        messageText  = (TextView)findViewById(R.id.messageText);

        messageText.setText("Uploading file path :- '/mnt/sdcard/"+uploadFileName+"'");

        /************* Php script path ****************/
        upLoadServerUri = "http://www.androidexample.com/media/UploadToServer.php";

        uploadButton.setOnClickListener(new OnClickListener() {            
            @Override
            public void onClick(View v) {

                dialog = ProgressDialog.show(UploadToServer.this, "", "Uploading file...", true);

                new Thread(new Runnable() {
                        public void run() {
                             runOnUiThread(new Runnable() {
                                    public void run() {
                                        messageText.setText("uploading started.....");
                                    }
                                });                      

                             uploadFile(uploadFilePath + "" + uploadFileName);

                        }
                      }).start();        
                }
            });
    }

    public int uploadFile(String sourceFileUri) {


          String fileName = sourceFileUri;

          HttpURLConnection conn = null;
          DataOutputStream dos = null;  
          String lineEnd = "\r\n";
          String twoHyphens = "--";
          String boundary = "*****";
          int bytesRead, bytesAvailable, bufferSize;
          byte[] buffer;
          int maxBufferSize = 1 * 1024 * 1024; 
          File sourceFile = new File(sourceFileUri); 

          if (!sourceFile.isFile()) {

               dialog.dismiss(); 

               Log.e("uploadFile", "Source File not exist :"
                                   +uploadFilePath + "" + uploadFileName);

               runOnUiThread(new Runnable() {
                   public void run() {
                       messageText.setText("Source File not exist :"
                               +uploadFilePath + "" + uploadFileName);
                   }
               }); 

               return 0;

          }
          else
          {
               try { 

                     // open a URL connection to the Servlet
                   FileInputStream fileInputStream = new FileInputStream(sourceFile);
                   URL url = new URL(upLoadServerUri);

                   // Open a HTTP  connection to  the URL
                   conn = (HttpURLConnection) url.openConnection(); 
                   conn.setDoInput(true); // Allow Inputs
                   conn.setDoOutput(true); // Allow Outputs
                   conn.setUseCaches(false); // Don't use a Cached Copy
                   conn.setRequestMethod("POST");
                   conn.setRequestProperty("Connection", "Keep-Alive");
                   conn.setRequestProperty("ENCTYPE", "multipart/form-data");
                   conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
                   conn.setRequestProperty("uploaded_file", fileName); 

                   dos = new DataOutputStream(conn.getOutputStream());

                   dos.writeBytes(twoHyphens + boundary + lineEnd); 
                   dos.writeBytes("Content-Disposition: form-data; name="uploaded_file";filename=""
                                             + fileName + """ + lineEnd);

                   dos.writeBytes(lineEnd);

                   // create a buffer of  maximum size
                   bytesAvailable = fileInputStream.available(); 

                   bufferSize = Math.min(bytesAvailable, maxBufferSize);
                   buffer = new byte[bufferSize];

                   // read file and write it into form...
                   bytesRead = fileInputStream.read(buffer, 0, bufferSize);  

                   while (bytesRead > 0) {

                     dos.write(buffer, 0, bufferSize);
                     bytesAvailable = fileInputStream.available();
                     bufferSize = Math.min(bytesAvailable, maxBufferSize);
                     bytesRead = fileInputStream.read(buffer, 0, bufferSize);   

                    }

                   // send multipart form data necesssary after file data...
                   dos.writeBytes(lineEnd);
                   dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

                   // Responses from the server (code and message)
                   serverResponseCode = conn.getResponseCode();
                   String serverResponseMessage = conn.getResponseMessage();

                   Log.i("uploadFile", "HTTP Response is : "
                           + serverResponseMessage + ": " + serverResponseCode);

                   if(serverResponseCode == 200){

                       runOnUiThread(new Runnable() {
                            public void run() {

                                String msg = "File Upload Completed.\n\n See uploaded file here : \n\n"
                                              +" http://www.androidexample.com/media/uploads/"
                                              +uploadFileName;

                                messageText.setText(msg);
                                Toast.makeText(UploadToServer.this, "File Upload Complete.", 
                                             Toast.LENGTH_SHORT).show();
                            }
                        });                
                   }    

                   //close the streams //
                   fileInputStream.close();
                   dos.flush();
                   dos.close();

              } catch (MalformedURLException ex) {

                  dialog.dismiss();  
                  ex.printStackTrace();

                  runOnUiThread(new Runnable() {
                      public void run() {
                          messageText.setText("MalformedURLException Exception : check script url.");
                          Toast.makeText(UploadToServer.this, "MalformedURLException", 
                                                              Toast.LENGTH_SHORT).show();
                      }
                  });

                  Log.e("Upload file to server", "error: " + ex.getMessage(), ex);  
              } catch (Exception e) {

                  dialog.dismiss();  
                  e.printStackTrace();

                  runOnUiThread(new Runnable() {
                      public void run() {
                          messageText.setText("Got Exception : see logcat ");
                          Toast.makeText(UploadToServer.this, "Got Exception : see logcat ", 
                                  Toast.LENGTH_SHORT).show();
                      }
                  });
                  Log.e("Upload file to server Exception", "Exception : "
                                                   + e.getMessage(), e);  
              }
              dialog.dismiss();       
              return serverResponseCode; 

           } // End else block 
         } 
}

Answer 1

你还是打消保存名字和路径的想法，以后再抓取吧。只需直接对其进行操作，如下所示，如果需要，可以传入额外的参数。

public static void openDialogToUploadFile(final Activity activity,final Context context) {

    File mPath = new File(Environment.getExternalStorageDirectory() + "//DIR//");

    FileDialog fileDialog = new FileDialog(activity, mPath);
    fileDialog.setFileEndsWith(".txt");

    fileDialog.addFileListener(new FileDialog.FileSelectedListener() {

        @Override
        public void fileSelected(File file) {
            Toast.makeText(context, "File: "+file, Toast.LENGTH_SHORT).show();
            doSomething(file.getName(), file.getAbsolutePath())
        }
    });
    fileDialog.showDialog();
}

public static void doSomething(String name, String path) {
     //work with what you want here
}

android filedialog 然后上传到服务器

android filedialog then upload to server

android

filedialog