Php android应用中图像文件的压缩
我正在尝试创建一个应用程序，将图像从设备上传到远程服务器。一切正常，但我需要将文件大小从几MB压缩到几十或数百KB。我做了一点研究，但我看到的每个地方都是关于压缩位图的，在我的代码中有一个文件和FileInputStream。这是我将图像发送到服务器的java代码：Php android应用中图像文件的压缩,php,android,image,file,image-compression,Php,Android,Image,File,Image Compression,我正在尝试创建一个应用程序，将图像从设备上传到远程服务器。一切正常，但我需要将文件大小从几MB压缩到几十或数百KB。我做了一点研究，但我看到的每个地方都是关于压缩位图的，在我的代码中有一个文件和FileInputStream。这是我将图像发送到服务器的java代码： public class ImageUpload { private String filePath; private String picName; public ImageUpload(int num
public class ImageUpload {
private String filePath;
private String picName;
public ImageUpload(int num, String path) {
filePath = path;
picName = "Pic" + num + ".jpg";
insertIntoServer();
}
public void insertIntoServer() {
new Thread(new Runnable() {
public void run() {
uploadFile();
}
}).start();
}
public int uploadFile() {
final String upLoadServerUri = "http://.../UploadToServer.php";
HttpURLConnection conn;
DataOutputStream dos;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(filePath);
int serverResponseCode = 0;
if (!sourceFile.isFile()) {
Log.e("uploadFile", "Source File not exist : " + filePath);
return 0;
} else {
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// 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", picName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\"" + picName + "\"" + 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)
serverResponseCode = conn.getResponseCode();
if (serverResponseCode == 200) {
// Read response
final StringBuilder responseSB = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = br.readLine()) != null)
responseSB.append(line);
// Close streams
br.close();
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
ex.printStackTrace();
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
e.printStackTrace();
Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);
}
return serverResponseCode;
}
}
}
<?php
$file_path = "../files/";
$file_path = $file_path . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) {
echo "success";
} else{
echo "fail";
}
?>
public class ImageUpload {
private String filePath;
private String picName;
public ImageUpload(int num, String path) {
filePath = path;
picName = "Pic" + num + ".jpg";
insertIntoServer();
}
public void insertIntoServer() {
new Thread(new Runnable() {
public void run() {
uploadFile();
}
}).start();
}
public int uploadFile() {
final String upLoadServerUri = "http://.../UploadToServer.php";
HttpURLConnection conn;
DataOutputStream dos;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(filePath);
int serverResponseCode = 0;
if (!sourceFile.isFile()) {
Log.e("uploadFile", "Source File not exist : " + filePath);
return 0;
} else {
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// 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", picName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\"" + picName + "\"" + 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)
serverResponseCode = conn.getResponseCode();
if (serverResponseCode == 200) {
// Read response
final StringBuilder responseSB = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = br.readLine()) != null)
responseSB.append(line);
// Close streams
br.close();
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
ex.printStackTrace();
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
e.printStackTrace();
Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);
}
return serverResponseCode;
}
}
}
<?php
$file_path = "../files/";
$file_path = $file_path . basename( $_FILES['uploaded_file']['name']);
if(move_uploaded_file($_FILES['uploaded_file']['tmp_name'], $file_path)) {
echo "success";
} else{
echo "fail";
}
?>
BitmapFactory.decodeStream(fileInputStream).compress(Bitmap.CompressFormat.JPEG, 15, dos);
dos.writeBytes(lineEnd);
BitmapFactory.decodeStream(fileInputStream).compress(Bitmap.CompressFormat.JPEG, 15, dos);
dos.writeBytes(lineEnd);