从Android应用上传多个图像到服务器

Question

I need to upload multiple images to PHP server from Android application. Multiple means that user can upload just 1 picture, or 2, or 3 or even 5 images.

Images I need to send to server with parameter path[numberOfImage], like this:

reqEntity.addPart("path[0]", bab);

With this code I can upload an image to server.

    File file1 = new File(selectedPath1);
    Bitmap bitmap = decodeFile(file1);      
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    bitmap.compress(CompressFormat.JPEG, 75, bos);
    byte[] data = bos.toByteArray();         

    try
    {
         HttpClient client = new DefaultHttpClient();
         HttpPost post = new HttpPost(urlString);

         ByteArrayBody bab = new ByteArrayBody(data, "test.jpg");

         MultipartEntity reqEntity = new MultipartEntity();

         reqEntity.addPart("path[0]", bab);

         post.setEntity(reqEntity);
         HttpResponse response = client.execute(post);
         resEntity = response.getEntity();
         response_str = EntityUtils.toString(resEntity);
     }

Answer 1

You can simply put it in a loop. Assuming you have an array of files (in this example called myFiles), you would just do something like this. Bear in mind that it's important of each iteration to create a new object of everything, so this way you're making sure you're sending always a different and independent object.

int i = 0;

String[] myFiles = { "C:\path1.jpg", "C:\path2.jpg" };

for (String selectedPath : myFiles) {
  File file = new File(selectedPath);
  Bitmap bitmap = decodeFile(file);
  ByteArrayOutputStream bos = new ByteArrayOutputStream();
  bitmap.compress(CompressFormat.JPEG, 75, bos);
  byte[] data = bos.toByteArray();         

  try {
    HttpClient client = new DefaultHttpClient();
    HttpPost post = new HttpPost(urlString);

    ByteArrayBody bab = new ByteArrayBody(data, "test.jpg");

    MultipartEntity reqEntity = new MultipartEntity();

    reqEntity.addPart("path[" + String.valueOf(i++) + "]", bab);

    post.setEntity(reqEntity);
    HttpResponse response = client.execute(post);
    resEntity = response.getEntity();
    response_str = EntityUtils.toString(resEntity);
  }
  catch (...) { ... }
}