为什么上传android后图像会模糊？

我正在学习将图片上传到服务器，从画廊或安卓相机拍摄的图片

当我使用图像解码从画廊或相机拍摄到图像视图后显示图像时，图像不会模糊。。。 但我上传后，像这样的图像可能会变小并且模糊。

我不知道，哪里出了错。无论是在解码图像上还是上传图像上

public void decodeFile(String filePath) {
    // Decode image size
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(filePath, o);

    // The new size we want to scale to
    final int REQUIRED_SIZE = 1024;

    // Find the correct scale value. It should be the power of 2.
    int width_tmp = o.outWidth, height_tmp = o.outHeight;
    int scale = 1;
    while (true) {
        if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)
            break;
        width_tmp /= 2;
        height_tmp /= 2;
        scale *= 2;
    }

    // Decode with inSampleSize
    BitmapFactory.Options o2 = new BitmapFactory.Options();
    o2.inSampleSize = scale;
    bitmap = BitmapFactory.decodeFile(filePath, o2);

    imgView.setImageBitmap(bitmap);

}

try {

            DatabaseHandler userDB = new DatabaseHandler(getApplicationContext());      
            HashMap<String, String> userDetail = userDB.getUserDetails();
            String uid= userDetail.get("uid");  

            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            bitmap.compress(CompressFormat.JPEG, 100, bos);
            byte[] data = bos.toByteArray();
            HttpClient httpClient = new DefaultHttpClient();                
            HttpPost postRequest = new HttpPost(PHP_URL);               
            ByteArrayBody bab = new ByteArrayBody(data,file_name);              
            MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
            reqEntity.addPart("uploadedfile", bab);
            postRequest.setEntity(reqEntity);
            HttpResponse response = httpClient.execute(postRequest);
            BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(),"UTF-8"));
            String sResponse;
            StringBuilder s = new StringBuilder();

            while ((sResponse = reader.readLine()) != null) {
                s = s.append(sResponse);
            }

            return s.toString().trim();

        } catch (Exception e) {

            err="error"+e.getMessage();
            Log.e(e.getClass().getName(), e.getMessage());

            return e.getMessage();
        }   

这是我的部分代码

解码代码

public void decodeFile(String filePath) {
    // Decode image size
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(filePath, o);

    // The new size we want to scale to
    final int REQUIRED_SIZE = 1024;

    // Find the correct scale value. It should be the power of 2.
    int width_tmp = o.outWidth, height_tmp = o.outHeight;
    int scale = 1;
    while (true) {
        if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)
            break;
        width_tmp /= 2;
        height_tmp /= 2;
        scale *= 2;
    }

    // Decode with inSampleSize
    BitmapFactory.Options o2 = new BitmapFactory.Options();
    o2.inSampleSize = scale;
    bitmap = BitmapFactory.decodeFile(filePath, o2);

    imgView.setImageBitmap(bitmap);

}

try {

            DatabaseHandler userDB = new DatabaseHandler(getApplicationContext());      
            HashMap<String, String> userDetail = userDB.getUserDetails();
            String uid= userDetail.get("uid");  

            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            bitmap.compress(CompressFormat.JPEG, 100, bos);
            byte[] data = bos.toByteArray();
            HttpClient httpClient = new DefaultHttpClient();                
            HttpPost postRequest = new HttpPost(PHP_URL);               
            ByteArrayBody bab = new ByteArrayBody(data,file_name);              
            MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
            reqEntity.addPart("uploadedfile", bab);
            postRequest.setEntity(reqEntity);
            HttpResponse response = httpClient.execute(postRequest);
            BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(),"UTF-8"));
            String sResponse;
            StringBuilder s = new StringBuilder();

            while ((sResponse = reader.readLine()) != null) {
                s = s.append(sResponse);
            }

            return s.toString().trim();

        } catch (Exception e) {

            err="error"+e.getMessage();
            Log.e(e.getClass().getName(), e.getMessage());

            return e.getMessage();
        }   

公共无效解码文件（字符串文件路径）{
//解码图像大小
BitmapFactory.Options o=新的BitmapFactory.Options（）；
o、 inJustDecodeBounds=true；
解码文件（文件路径，o）；
//我们要扩展到的新尺寸
所需的最终int_SIZE=1024；
//找到正确的刻度值。它应该是2的幂。
内部宽度=o.向外宽度，高度=o.向外高度；
int标度=1；
while（true）{
如果（宽度\u tmp<要求的\u尺寸和高度\u tmp<要求的\u尺寸）
打破
宽度_tmp/=2；
高度_tmp/=2；
比例*=2；
}
//用inSampleSize解码
BitmapFactory.Options o2=新的BitmapFactory.Options（）；
o2.inSampleSize=刻度；
位图=BitmapFactory.decodeFile（文件路径，o2）；
imgView.setImageBitmap（位图）；
}

上传代码

public void decodeFile(String filePath) {
    // Decode image size
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(filePath, o);

    // The new size we want to scale to
    final int REQUIRED_SIZE = 1024;

    // Find the correct scale value. It should be the power of 2.
    int width_tmp = o.outWidth, height_tmp = o.outHeight;
    int scale = 1;
    while (true) {
        if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)
            break;
        width_tmp /= 2;
        height_tmp /= 2;
        scale *= 2;
    }

    // Decode with inSampleSize
    BitmapFactory.Options o2 = new BitmapFactory.Options();
    o2.inSampleSize = scale;
    bitmap = BitmapFactory.decodeFile(filePath, o2);

    imgView.setImageBitmap(bitmap);

}

try {

            DatabaseHandler userDB = new DatabaseHandler(getApplicationContext());      
            HashMap<String, String> userDetail = userDB.getUserDetails();
            String uid= userDetail.get("uid");  

            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            bitmap.compress(CompressFormat.JPEG, 100, bos);
            byte[] data = bos.toByteArray();
            HttpClient httpClient = new DefaultHttpClient();                
            HttpPost postRequest = new HttpPost(PHP_URL);               
            ByteArrayBody bab = new ByteArrayBody(data,file_name);              
            MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
            reqEntity.addPart("uploadedfile", bab);
            postRequest.setEntity(reqEntity);
            HttpResponse response = httpClient.execute(postRequest);
            BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(),"UTF-8"));
            String sResponse;
            StringBuilder s = new StringBuilder();

            while ((sResponse = reader.readLine()) != null) {
                s = s.append(sResponse);
            }

            return s.toString().trim();

        } catch (Exception e) {

            err="error"+e.getMessage();
            Log.e(e.getClass().getName(), e.getMessage());

            return e.getMessage();
        }   

试试看{
DatabaseHandler userDB=新的DatabaseHandler（getApplicationContext（））；
HashMap userDetail=userDB.getUserDetails（）；
字符串uid=userDetail.get（“uid”）；
ByteArrayOutputStream bos=新建ByteArrayOutputStream（）；
压缩（CompressFormat.JPEG，100，bos）；
字节[]数据=bos.toByteArray（）；
HttpClient HttpClient=新的DefaultHttpClient（）；
HttpPost postRequest=新的HttpPost（PHP_URL）；
ByteArrayBody bab=新的ByteArrayBody（数据、文件名）；
MultipartEntity reqEntity=新的MultipartEntity（HttpMultipartMode.BROWSER_兼容）；
reqEntity.addPart（“上传文件”，bab）；
postRequest.setEntity（reqEntity）；
HttpResponse response=httpClient.execute（postRequest）；
BufferedReader=新的BufferedReader（新的InputStreamReader（response.getEntity（）.getContent（），“UTF-8”）；
字符串响应；
StringBuilder s=新的StringBuilder（）；
而（（sResponse=reader.readLine（））！=null）{
s=s.append（sResponse）；
}
返回s.toString（）.trim（）；
}捕获（例外e）{
err=“error”+e.getMessage（）；
Log.e（e.getClass（）.getName（），e.getMessage（））；
返回e.getMessage（）；
}   

上传前，图像显示在ImageView中

上传后，在listview中显示

我希望任何人都能帮助我。抱歉，如果我的英语不好…

您正在100%压缩图像，这会降低图像质量

        bitmap.compress(CompressFormat.JPEG, 100, bos);

---

我建议使用小于100的值并进行调整，直到质量和尺寸之间达到平衡

压缩机提示，0-100。0表示压缩小尺寸，100表示压缩最大质量Dante和@Selvin，在此之前。。。我已经设置了bitmap.compress（CompressFormat.JPEG，70，bos），但它仍然模糊和更小…是的。。搞错了，解码时应该有问题。。请尝试将下载后的位图大小与上载的位图大小进行比较。我不知道大小的值如何Din listview我使用懒散加载，是否因为这个？