gpt4 book ai didi

android - 如何将android中的高分辨率图像上传到.net API服务器?

转载 作者:行者123 更新时间:2023-11-30 00:59:15 25 4
gpt4 key购买 nike

我正在使用下面的代码将图像上传到服务器,但它正在将图像压缩到较低的分辨率。

    class ImageUploadTask extends AsyncTask<String, Void, String> {

@Override
protected String doInBackground(String... params) {
ByteArrayBody bab;
ByteArrayOutputStream bos = new ByteArrayOutputStream();

URL url = new URL(webAddressToPost);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("enctype", "multipart/form-data");

MultipartEntity entity = new MultipartEntity();

signature_image.compress(Bitmap.CompressFormat.PNG, 100, bos);
byte[] data = bos.toByteArray();
bab = new ByteArrayBody(data, contactNo+"_Signature.png");

entity.addPart("file", bab);
conn.addRequestProperty(entity.getContentType().getName(), entity.getContentType().getValue());

OutputStream os = conn.getOutputStream();
entity.writeTo(conn.getOutputStream());
os.close();
conn.connect();
}
}

如何将高分辨率图片上传到服务器而不是压缩图片?

最佳答案

您的代码将压缩图像,然后上传到服务器。而是使用以下代码将原始分辨率的图像上传到服务器。

class ImageUploadTask extends AsyncTask<String, Integer, String> {
private String webAddressToPost = "WRITE_YOUR_API_URL_TO_UPLOAD_IMAGE";

@Override
protected void onPreExecute() {
}


@Override
protected String doInBackground(String... params) {
String image_file_type = params[0];
String file_name = params[1];
int i=1;
if (i==1){


int day, month, year;
int second, minute, hour;
GregorianCalendar date = new GregorianCalendar();

day = date.get(Calendar.DAY_OF_MONTH);
month = date.get(Calendar.MONTH);
year = date.get(Calendar.YEAR);

second = date.get(Calendar.SECOND);
minute = date.get(Calendar.MINUTE);
hour = date.get(Calendar.HOUR);

String name=(hour+""+minute+""+second+""+day+""+(month+1)+""+year);
String tag=name+".jpg";



fileName = frontCameraImageUrl.replace(frontCameraImageUrl,tag);
sourceFile = new File(frontCameraImageUrl);

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;


if (!sourceFile.isFile()) {


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


return "0";

}
else
{
try {

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

// 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=\""
+ file_name + "\"" + 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)
int serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();

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

if(serverResponseCode == 200){

runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(MainActivity.this, "File Upload Complete.", Toast.LENGTH_SHORT).show();
}
});
}

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

} catch (MalformedURLException ex) {

ex.printStackTrace();

runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(MainActivity.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
}
});

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

e.printStackTrace();

runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(MainActivity.this, "Got Exception : see logcat ", Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload Exception", "Exception : " + e.getMessage(), e);
}
return "serverResponseCode";

}
}

return null;
}

@Override
protected void onPostExecute(String result) {
Toast.makeText(getApplicationContext(), "file uploaded",
Toast.LENGTH_LONG).show();
}

}

关于android - 如何将android中的高分辨率图像上传到.net API服务器?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39683936/

25 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com