Upload Android images to the PHP Server instance asynchronously-php Tutorial

Android image upload to PHP Server instance background asynchronously

I have uploaded a lot of files to the java server on the Internet for a long time and found the files to be uploaded to php. The idea is similar to what I originally thought, that is, POST. Look at the code.

PHP code

PHP code

2. $ Target_path = "./upload/"; // receiving file directory
3. $ Target_path = $ target_path. basename ($ _ FILES ['uploadfile'] ['name']);
4. If (move_uploaded_file ($ _ FILES ['uploadfile'] ['tmp _ name'], $ target_path )){
5. Echo "The file". basename ($ _ FILES ['uploadfile'] ['name']). "has been uploaded ";
6. } Else {
7. Echo "There was an error uploading the file, please try again! ". $ _ FILES ['uploadfile'] ['error'];
8. }
9. ?>

Android code

Main Upload code:

Java code

1. Private void uploadFile (String uploadUrl)
2. {
3. String end = "\ r \ n ";
4. String twoHyphens = "--";
5. String boundary = "******";
6. Try
7. {
8. URL url = new URL (uploadUrl );
9. HttpURLConnection httpURLConnection = (HttpURLConnection) url
10. . OpenConnection (); // http connection
11. // Set the stream size for each transmission to effectively prevent the phone from crashing due to insufficient memory
13. HttpURLConnection. setChunkedStreamingMode (128*1024); // 128 K
14. // Allow input and output streams
15. HttpURLConnection. setDoInput (true );
16. HttpURLConnection. setDoOutput (true );
17. HttpURLConnection. setUseCaches (false );
18. // Use the POST method
19. HttpURLConnection. setRequestMethod ("POST ");
20. HttpURLConnection. setRequestProperty ("Connection", "Keep-Alive"); // Keep the Connection
21. HttpURLConnection. setRequestProperty ("Charset", "UTF-8"); // encoding
22. HttpURLConnection. setRequestProperty ("Content-Type ",
23. "Multipart/form-data; boundary =" + boundary); // POST the passed encoding
25. DataOutputStream dos = new DataOutputStream (
26. HttpURLConnection. getOutputStream (); // output stream
27. Dos. writeBytes (twoHyphens + boundary + end );
28. Dos. writeBytes ("Content-Disposition: form-data; name = \" uploadedfile \ "; filename = \""
29. + SrcPath. substring (srcPath. lastIndexOf ("/") + 1)
30. + "\""
31. + End );
32. Dos. writeBytes (end );
34. FileInputStream FCM = new FileInputStream (srcPath); // File input stream, written to memory
35. Byte [] buffer = new byte [0, 8192]; // 8 k
36. Int count = 0;
37. // Read the file
38. While (count = fs. read (buffer ))! =-1)
39. {
40. Dos. write (buffer, 0, count );
41. }
42. FCM. close ();
44. Dos. writeBytes (end );
45. Dos. writeBytes (twoHyphens + boundary + twoHyphens + end );
46. Dos. flush ();
48. InputStream is = httpURLConnection. getInputStream (); // http input, that is, the returned result is obtained.
49. InputStreamReader isr = new InputStreamReader (is, "UTF-8 ");
50. BufferedReader br = new BufferedReader (isr );
51. String result = br. readLine ();
53. Toast. makeText (this, result, Toast. LENGTH_LONG). show (); // output the result
54. Dos. close ();
55. Is. close ();
57. } Catch (Exception e)
58. {
59. E. printStackTrace ();
60. SetTitle (e. getMessage ());
61. }
62. }

Because the time-consuming operations after Android 4.0 are required to be performed in non-UI threads, I will use the previous AsyncTask ~

AsyncTask portal: http://www.cnblogs.com/yydcdut/p/3707960.html

In this class, put the upload operation in doInBackground, and you can see ProgressDialog to display the upload quantity:

Java code

1. // Read file
2. BytesRead = fileInputStream. read (buffer, 0, bufferSize );
4. While (bytesRead> 0 ){
5. OutputStream. write (buffer, 0, bufferSize );
6. Length + = bufferSize;
7. Progress = (int) (length * 100)/totalSize );
8. PublishProgress (progress );
10. BytesAvailable = fileInputStream. available ();
11. BufferSize = Math. min (bytesAvailable, maxBufferSize );
12. BytesRead = fileInputStream. read (buffer, 0, bufferSize );
13. }
14. OutputStream. writeBytes (lineEnd );
15. OutputStream. writeBytes (twoHyphens + boundary + twoHyphens
16. + LineEnd );
17. PublishProgress (100 );

Also, pay attention to the permissions:

XML/HTML code

1. <Uses-permission android: name = "android. permission. INTERNET"/>