我正在尝试使用 HttpUrlConnection Multipart 将相机捕获的图像，图库图像和pdf上传到服务器。它在 Android棉花糖设备中工作得很好，但是随后我尝试从 Android Oreo设备上传，它在相机中引发了异常找不到文件异常图片上传，在图库图片中休息，然后pdf上传完美。请帮助
摄像机捕获代码：
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File file = getOutputMediaFile(CAMERA_CAPTURE_IMAGE_REQUEST,getActivity(),moduleType);
if (file != null) {
imageStoragePath = file.getAbsolutePath();
}
Uri fileUri = getOutputMediaFileUri(context, file);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
startActivityForResult(intent,CAMERA_CAPTURE_IMAGE_REQUEST);
public File getOutputMediaFile(int type,Context context,String moduleType) {
File mediaStorageDir = new File(Environment.getExternalStorageDirectory()+File.separator+context.getResources().getString(R.string.app_name)+File.separator+moduleType);
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.e(moduleType +"directory", "Oops! Failed create "
+ moduleType + " directory");
return null;
}
}
// Preparing media file naming convention
// adds timestamp
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
Locale.getDefault()).format(new Date());
File mediaFile;
if (type == CAMERA_CAPTURE_IMAGE_REQUEST) {
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ moduleType + timeStamp + "." + "jpeg");
}else if (type == GALLERY_CAPTURE_IMAGE_REQUEST){
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ moduleType + timeStamp + "." + "jpeg");
}else if (type==PDF_CAPTURE_PICKER_REQUEST){
mediaFile = new File(mediaStorageDir.getPath() + File.separator
+ moduleType + timeStamp + "." + "pdf");
}else {
return null;
}
return mediaFile;
}
public Uri getOutputMediaFileUri(Context context, File file) {
return FileProvider.getUriForFile(context, context.getPackageName() + ".provider", file);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
File selectFile;
if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST){
if (resultCode == RESULT_OK){
selectFile = new File(imageStoragePath);
ImageFileBean imageFileBean = new ImageFileBean();
imageFileBean.setFilePath(selectFile.getAbsolutePath());
imageFileBean.setFileName(selectFile.getName());
}
}
}
MultipartUtility.class
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.file.Files;
public class MultipartUtilityV2 {
private HttpURLConnection httpConn;
private DataOutputStream request;
private final String boundary = "*****";
private final String crlf = "\r\n";
private final String twoHyphens = "--";
/**
* This constructor initializes a new HTTP POST request with content type
* is set to multipart/form-data
*
* @param requestURL
* @throws IOException
*/
public MultipartUtilityV2(String requestURL)
throws IOException {
// creates a unique boundary based on time stamp
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoOutput(true); // indicates POST method
httpConn.setDoInput(true);
httpConn.setRequestMethod("POST");
httpConn.setRequestProperty("Connection", "Keep-Alive");
httpConn.setRequestProperty("Cache-Control", "no-cache");
httpConn.setRequestProperty(
"Content-Type", "multipart/form-data;boundary=" + this.boundary);
request = new DataOutputStream(httpConn.getOutputStream());
}
/**
* Adds a form field to the request
*
* @param name field name
* @param value field value
*/
public void addFormField(String name, String value)throws IOException {
request.writeBytes(this.twoHyphens + this.boundary + this.crlf);
request.writeBytes("Content-Disposition: form-data; name=\"" + name + "\""+ this.crlf);
request.writeBytes("Content-Type: text/plain; charset=UTF-8" + this.crlf);
request.writeBytes(this.crlf);
request.writeBytes(value+ this.crlf);
request.flush();
}
/**
* Adds a upload file section to the request
*
* @param fieldName name attribute in <input type="file" name="..." />
* @param uploadFile a File to be uploaded
* @throws IOException
*/
public void addFilePart(String fieldName, File uploadFile)
throws IOException {
String fileName = uploadFile.getName();
request.writeBytes(this.twoHyphens + this.boundary + this.crlf);
request.writeBytes("Content-Disposition: form-data; name=\"" +
fieldName + "\";filename=\"" +
fileName + "\"" + this.crlf);
request.writeBytes(this.crlf);
byte[] bytes = new byte[0];
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
bytes = Files.readAllBytes(uploadFile.toPath());
}
request.write(bytes);
}
/**
* Completes the request and receives response from the server.
*
* @return a list of Strings as response in case the server returned
* status OK, otherwise an exception is thrown.
* @throws IOException
*/
public String finish() throws IOException {
String response ="";
request.writeBytes(this.crlf);
request.writeBytes(this.twoHyphens + this.boundary +
this.twoHyphens + this.crlf);
request.flush();
request.close();
// checks server's status code first
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
InputStream responseStream = new
BufferedInputStream(httpConn.getInputStream());
BufferedReader responseStreamReader =
new BufferedReader(new InputStreamReader(responseStream));
String line = "";
StringBuilder stringBuilder = new StringBuilder();
while ((line = responseStreamReader.readLine()) != null) {
stringBuilder.append(line).append("\n");
}
responseStreamReader.close();
response = stringBuilder.toString();
httpConn.disconnect();
}else if (status == HttpURLConnection.HTTP_INTERNAL_ERROR){
BufferedReader reader = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
String line = null;
StringBuilder stringBuilder = new StringBuilder();
while ((line = reader.readLine()) != null) {
stringBuilder.append(line).append('\n');
}
reader.close();
response = stringBuilder.toString();
httpConn.disconnect();
} else {
throw new IOException("Server returned non-OK status: " + status);
}
return response;
}
}