当我将图像从 android 设备 (v 2.2) 上传到服务器 (apache with php) 基本上，这里有同样的问题:Android Development Image Upload Corrupted
一开始，上传方式是基于apache httpcomponent 4.1，我以为是它的问题。然后我自己写了一个基于HttpURLConnection的上传库。
我尝试使用不同的服务器，但还是一样。
例子:
http://pixelbirthcloud.com/corrupted_images/1_orig.jpg - 原图
http://pixelbirthcloud.com/corrupted_images/1_corrupted.jpg - 我们在服务器上得到了什么。
文件大小相同，但内容中的内容有一个损坏的字节 block :
00051330 | 49 69 11 4B 9D E6 | 00051330 | DA BB 10 70 DC 77 |
00051338 | 2D B9 1B B9 E4 81 5A E6 | 00051338 | AC 20 C7 90 7E B4 33 80 |
00051340 | D4 14 B0 F4 EA 3D D1 E9 | 00051340 | 31 9A B8 C2 29 83 66 9C |
00051348 | 61 9D E3 38 F7 36 DE 63 | 00051348 | 9A 84 8E 73 9A 8D B5 29 |
00051350 | 25 9D 9D C4 64 C3 23 AA | 00051350 | 18 60 1C 0F 7A CF 33 01 |
00051358 | 4A EB 08 C3 97 7C 8C 36 | 00051358 | D4 F0 7A D3 24 BA 85 71 |
00051360 | 73 F5 E3 15 14 5B BC C1 | 00051360 | F3 0A 76 8A D6 C4 36 5E |
00051368 | B9 A4 49 06 71 1B 11 87 | 00051368 | 7B B9 5F 20 E3 A5 46 F2 |
00051370 | 39 E7 76 7B 8F 5F | 00051370 | B8 1D 4E 6B 36 6D |
我不知道它取决于什么，但在我客户的设备上，图像会变得更加损坏。有时上传正常，但大多数时候上传的图像已损坏。
所以我想这与 http 传输无关。它是关于从 SD 卡获取流到内存，然后将该流保存到 http...
代码如下。
你们有什么想法吗？什么都试过了，还是不行。
public String execute() throws IOException {
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****MultipartBoundary";
try {
URL url = new URL(mUri);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
// timeouts
conn.setConnectTimeout(CONNECT_TIMEOUT);
conn.setReadTimeout(READ_TIMEOUT);
Log.d(TAG, "Opening connectionStream");
DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
Log.d(TAG, "Adding params");
for (NameValuePair param : mParams) {
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: post-data; name="
+ param.getName() + lineEnd);
dos.writeBytes(lineEnd);
dos.writeBytes(param.getValue());
dos.writeBytes(lineEnd);
}
File file;
Log.d(TAG, "Adding files");
for (NameValuePair param : mFiles) {
file = new File(param.getValue());
if (file.exists()) {
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: post-data; name="
+ param.getName() + "; filename=" + file.getName()
+ lineEnd);
dos.writeBytes("Content-Type: application/octet-stream" + lineEnd);
dos.writeBytes("Content-Transfer-Encoding: binary" + lineEnd);
dos.writeBytes(lineEnd);
Log.d(TAG, "Opening fileInputStream");
FileInputStream fileStream = new FileInputStream(file);
try {
int bytesAvailable;
while((bytesAvailable = fileStream.available()) > 0)
{
int bufferSize = Math.min(bytesAvailable, 4096);
byte[] buffer = new byte[bufferSize];
int bytesRead = fileStream.read(buffer, 0, bufferSize);
dos.write(buffer, 0, bytesRead);
}
dos.writeBytes(lineEnd);
} finally {
fileStream.close();
}
Log.d(TAG, "Closing fileINputStream");
}
}
// very important - we specify the end of the multipart block
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
dos.flush();
dos.close();
// getting response
if (conn.getResponseCode() == HttpStatus.SC_OK) {
BufferedInputStream bis = new BufferedInputStream(conn.getInputStream());
try {
ByteArrayBuffer baf = new ByteArrayBuffer(50);
int read = 0;
int bufSize = 512;
byte[] buffer = new byte[bufSize];
while(true){
read = bis.read(buffer);
if(read==-1){
break;
}
baf.append(buffer, 0, read);
}
Log.d(TAG, "Connection successful - returning result");
return new String(baf.toByteArray(), "UTF-8");
} finally {
bis.close();
}
} else {
Log.d(TAG, "Return code is " + Integer.toString(conn.getResponseCode()));
throw new IOException("Return code is " + Integer.toString(conn.getResponseCode()));
}
} catch (MalformedURLException e) {
Log.e(TAG, "Exception: " + e.getMessage(), e);
throw new IOException("aaa");
} catch (IOException e) {
Log.e(TAG, "Exception: " + e.getMessage(), e);
throw new IOException();
}
}
更新:
创建流时考虑到数据损坏..所以我稍微更改了代码以从源流中保存文件:
FileOutputStream fileOutStream = new FileOutputStream(AndorraApplication.getPhotosPath() + "/orig_" +file.getName() );
DataOutputStream dataOutStream = new DataOutputStream(fileOutStream);
try {
int bytesAvailable;
while((bytesAvailable = fileStream.available()) > 0)
{
int bufferSize = Math.min(bytesAvailable, 4096);
byte[] buffer = new byte[bufferSize];
int bytesRead = fileStream.read(buffer, 0, bufferSize);
dos.write(buffer, 0, bytesRead);
dataOutStream.write(buffer, 0, bytesRead);
}
dos.writeBytes(lineEnd);
} finally {
fileStream.close();
dataOutStream.close();
}
结果是，虽然上传的图像已损坏，但使用 dataOutStream 存储的图像是好的……现在完全丢失了。
Froyo 上的 HTTPUrlConnection 是否存在错误？
最佳答案
检查我在这里回答如何将文件(让它是内存中的图像文件或任何文件)上传到服务器..
Android httpclient file upload data corruption and timeout issues
它对我上传图片非常有用。
关于通过 http 上传时 Android 图片损坏，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/4920912/