android图片压缩上传，php服务器按照压缩比例将图片放大为原图大小后严重失真，怎么解决？
如果我直接上传原图是没有任何问题的，但是我要的是将图片进行压缩后再上传，php服务器再根据接收的图片和压缩比例，将接收的图片按比例放大为原图的大小。这些都做到了，可问题是图片失真
下面贴出我的部分java客户端代码和php服务器端代码，大家帮我看看问题出在哪里：
public class myThread extends Thread{
@Override
public void run() {
// TODO Auto-generated method stub
String r = null;
upload_fail = new ArrayList<HashMap<String, String>>();
if (!catid.equals(null)) {
for (HashMap<String, String> map : path_list) {
String path = map.get("img_path");
Bitmap bit = BitmapFactory.decodeFile(path);
float pc = (float) 100 / (float) bit.getWidth();//压缩比例
Bitmap bit2 = resize_img(bit, pc);//压缩bitmap
String filename = path.substring(path.lastIndexOf("/") + 1);
File file = saveMyBitmap(filename, bit2);
//File file = new File(path);//若上传原图则用这一行代码代替上面5行即可
upload_res = UploadUtil.uploadFile(file, pc, actionUrl, catid, s_sessid, s_psnId);//上传(返回一个HashMap)
String result = upload_res.get("ans").toString();
if (!result.equals("success")) {
//失败
HashMap<String, String> fail_map = new HashMap<String, String>();
fail_map.put("name", file.getName());
fail_map.put("path", path);
upload_fail.add(fail_map);
} else {
//成功
file.delete();
bit2.recycle();
bit2 = null;
System.gc();
upload_success.add(map.get("thrum_path"));
}
}
s_psnId = upload_res.get("sess_psnId").toString();
s_sessid = upload_res.get("sessionId").toString();
if (upload_fail.size() == 0) {
//全部成功
r = "success";
}else {
if (upload_success.size() == 0) {
//全部失败
r = upload_res.get("ans").toString();
} else {
//部分失败
r = "对不起，图片 [ ";
for (HashMap<String, String> map : upload_fail) {
r += map.get("name") + " ";
}
r += "] 上传失败！";
}
}
} else {
r = "请选择相册";
}
Message msg = myHand.obtainMessage();
Bundle b = new Bundle();
b.putString("res", r);
msg.setData(b);
myHand.sendMessage(msg);
}
}
//压缩bitmap
private Bitmap resize_img(Bitmap bitmap, float pc) {
Matrix matrix = new Matrix();
Log.i("mylog2", "缩放比例--" + pc);
matrix.postScale(pc, pc); // 长和宽放大缩小的比例
Bitmap resizeBmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),
bitmap.getHeight(), matrix, true);
bitmap.recycle();
bitmap = null;
System.gc();
int width = resizeBmp.getWidth();
int height = resizeBmp.getHeight();
Log.i("mylog2", "按比例缩小后宽度--" + width);
Log.i("mylog2", "按比例缩小后高度--" + height);
return resizeBmp;
}
//将压缩的bitmap保存到sdcard卡临时文件夹img_interim，用于上传
@SuppressLint("SdCardPath")
public File saveMyBitmap(String filename, Bitmap bit) {
File dir = new File("/sdcard/img_interim/");
if (!dir.exists()) {
dir.mkdir();
}
File f = new File("/sdcard/img_interim/" + filename);
try {
f.createNewFile();
FileOutputStream fOut = null;
fOut = new FileOutputStream(f);
bit.compress(Bitmap.CompressFormat.PNG, 100, fOut);
fOut.flush();
fOut.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
f = null;
e1.printStackTrace();
}
return f;
}
public class UploadUtil {
private static final String TAG = "mylog2";
private static final int TIME_OUT = 10 * 1000; // 超时时间
private static final String CHARSET = "utf-8"; // 设置编码
/**
*
* 上传文件到服务器
* @param file 需要上传的文件
* @param RequestURL 请求的rul
* @return 返回响应的内容
*/
public static HashMap<String, Object> uploadFile(File file, float pc, String RequestURL,
String catid, String sessionid, String psnid) {
HashMap<String, Object> response_map = new HashMap<String, Object>();
int res = 0;
String result = null;
String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成
String PREFIX = "--", LINE_END = "\r\n";
String CONTENT_TYPE = "multipart/form-data"; // 内容类型
try {
RequestURL += "?sessionId=" + sessionid + "&sess_psnId=" + psnid;
RequestURL += "&catid=" + catid + "&pc=" + pc;
URL url = new URL(RequestURL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(TIME_OUT);
conn.setConnectTimeout(TIME_OUT);
conn.setDoInput(true); // 允许输入流
conn.setDoOutput(true); // 允许输出流
conn.setUseCaches(false); // 不允许使用缓存
conn.setRequestMethod("GET"); // 请求方式
conn.setInstanceFollowRedirects(true);
conn.setRequestProperty("Charset", CHARSET); // 设置编码
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary="
+ BOUNDARY);
conn.connect();
if (file != null) {
DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
StringBuffer sb = new StringBuffer();
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINE_END);
sb.append("Content-Disposition: form-data; name="uploadedimg"; filename=""
+ file.getName() + """ + LINE_END);
sb.append("Content-Type: application/octet-stream; charset="
+ CHARSET + LINE_END);
sb.append(LINE_END);
dos.write(sb.toString().getBytes());
InputStream is = new FileInputStream(file);
byte[] bytes = new byte[1024];
int len = 0;
while ((len = is.read(bytes)) != -1) {
dos.write(bytes, 0, len);
}
is.close();
dos.write(LINE_END.getBytes());
byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END)
.getBytes();
dos.write(end_data);
dos.flush();
//获取响应码 200=成功 当响应成功，获取响应的流
res = conn.getResponseCode();
if (res == 200) {
InputStream input = conn.getInputStream();
StringBuffer sb1 = new StringBuffer();
int ss;
while ((ss = input.read()) != -1) {
sb1.append((char) ss);
}
result = sb1.toString();
Log.i("mylog2", "--" + result);
result = result.substring(result.indexOf("{"));
try {
JSONObject obj = new JSONObject(result);
String info = obj.getString("ans");
if (info.equals("success")) {
response_map.put("catid", obj.getString("catid"));
}
response_map.put("ans", info);
response_map.put("sessionId", obj.getString("sessionid"));
response_map.put("sess_psnId", obj.getString("session_psn_id"));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
Log.e(TAG, "request error");
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response_map;
}
}
$ans = array();
$pc = $_GET['pc'];
$ans['ans'] = "";
if (isset($_FILES['uploadedimg'])) {
$target_path = $_SERVER['DOCUMENT_ROOT']."/uploads/";//接收文件目录
$file_name = basename($_FILES['uploadedimg']['name']);
$str = explode('.', $file_name);
$img_type = $str[count($str) - 1];
$target_path .= $file_name;
if (move_uploaded_file($_FILES['uploadedimg']['tmp_name'], $target_path)) {
$src_info = @getimagesize($target_path);
$src_w = $src_info[0];
$src_h = $src_info[1];
$dst_w = $src_w / $pc;
$dst_h = $src_h / $pc;
$ans['imginfo'] = round($dst_w) . "--" + round($dst_h);
if($img_type == "jpg" || $img_type == "jpeg") {
$img_ty = 1;
$src_im = imagecreatefromjpeg($target_path);
} else if ($img_type == "png") {
$img_ty = 2;
$src_im = imagecreatefrompng($target_path);
} else if ($img_type == "gif") {
$img_ty = 3;
$src_im = imagecreatefromgif($target_path);
}
$dst_im = imagecreatetruecolor(round($dst_w), round($dst_h));
$bg = imagecolorallocate($dst_im, 255, 255, 255);
imagefill($dst_im, 0, 0, $bg);
imagecopyresampled($dst_im, $src_im, 0, 0, 0, 0, $dst_w, $dst_h, $src_w, $src_h);
switch ($img_ty) {
case 1 :
imagejpeg($dst_im, $target_path, 100);
$ans['ans'] = "success";
break;
case 2 :
imagepng($dst_im, $target_path);
$ans['ans'] = "success";
break;
case 3 :
imagegif($dst_im, $target_path);
$ans['ans'] = "success";
break;
default :
$ans['ans'] = "格式无法识别";
}
}
}
echo json_encode($ans);
android 图片压缩上传 PHP 