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请原谅我的英语不好，我是法国人！

在我的 Android 应用程序中，我必须在将图片发送到服务器之前从图库中调整大小并裁剪图片而不保存它。

这是我要发送到服务器的代码：

    HttpURLConnection connection = null;
    DataOutputStream outputStream = null;

    String pathToOurFile = imagePath;
    String urlServer = "http://ip/serverApp/upload/transfert.php";
    Log.e("UploadImage", urlServer);
    String lineEnd = "\r\n";
    String twoHyphens = "--";
    String boundary =  "*****";

    try
    {
        File file = new File(imagePath);
        FileInputStream fileInputStream = new FileInputStream(file);
        byte[] bytes = new byte[(int) file.length()];
        fileInputStream.read(bytes);
        fileInputStream.close();

        URL url = new URL(urlServer);
        connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
        connection.setDoOutput(true);
        outputStream = new DataOutputStream( connection.getOutputStream() );
        outputStream.writeBytes(twoHyphens + boundary + lineEnd);
        outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + pathToOurFile +"\"" + lineEnd);
        outputStream.writeBytes(lineEnd);

        int bufferLength = 1024;
        for (int i = 0; i < bytes.length; i += bufferLength) {
            int progress = (int)((i / (float) bytes.length) * 100);
            publishProgress(progress);
            if (bytes.length - i >= bufferLength) {
                outputStream.write(bytes, i, bufferLength);
            } else {
                outputStream.write(bytes, i, bytes.length - i);
            }
        }

        outputStream.writeBytes(lineEnd);
        outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

        outputStream.close();
        outputStream.flush();

        InputStream inputStream = connection.getInputStream();

        // read the response
        inputStream.close();

        int serverResponseCode = connection.getResponseCode();
        String serverResponseMessage = connection.getResponseMessage();


        Log.w("Upload image", "Response -> Code:"+serverResponseCode+" Message:"+serverResponseMessage);

        return serverResponseCode;
    }
    catch (Exception ex)
    {
        ex.printStackTrace();
    }

现在我需要编写代码来调整和裁剪图片，以获得 350px/350px 大小的图像。

你知道我该怎么做吗？

非常感谢。

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2 回答 2

2

好的 ！！！！对于正确的方法，请遵循此代码！

但是：小心，这是一个例子！->你不应该在主线程中做一个互联网请求

要执行此代码，该函数exec();应放入一个“doInBackground()”asyncTask<Object, Object, Object>();

和 覆盖应该进入startActivityForResult()活动类onActivityResult()

告诉我是否正确！！！！

private int ACTIVITY_ID_PICK_PHOTO = 42;
private int maxWidth = 350;
private int maxHeight = 350;
private String url = "http://ip/serverApp/upload/transfert.php"

//Call the activity for select photo into the gallery
private void SelectPhoto(){
    Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
    photoPickerIntent.setType("image/*");
    startActivityForResult(photoPickerIntent, ACTIVITY_ID_PICK_PHOTO);
}

// check the return of the result
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
//check th id of the result
    if (requestCode == ACTIVITY_ID_PICK_PHOTO)
        selectPhotoControl(data);
}

//Working data
private void selectPhotoControl(Intent data) {
//check if any photo is selected
    if (data == null)
        return;
//get the uri of the picture selected
    Uri photoUri = data.getData();
    if (photoUri != null) {
//decode the Uri
        String[] filePathColumn = { MediaStore.Images.Media.DATA };
        Cursor cursor = getContentResolver().query(photoUri,
                filePathColumn, null, null, null);
        cursor.moveToFirst();
        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
//get the uri of the image
        String filePath = cursor.getString(columnIndex);
        cursor.close();
//get the image in the bitmap and resize the image
        Bitmap bp = resize(filePath);
        if (bp != null)
            postImage(bp, filePath);
    }
}

public static HttpResponse postImage(Bitmap bp, String uristr) throws ClientProtocolException, IOException {
//initialization of the postrequest
        HttpPost httpPost = new HttpPost(url);
//create the multipart entitiy (if you want send another content)
        MultipartEntity entity = new MultipartEntity(
//the boundary for separate the informations
        HttpMultipartMode.BROWSER_COMPATIBLE, "------CustomBoundary", null);
        if (bp != null) {
//create the bytes array for send the image
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
//if you want to compress the image -> write the result into bos
            bp.compress(CompressFormat.JPEG, 100, bos);
//get the filename of the image
            String filename = uristr.substring(uristr.lastIndexOf("/") + 1,
                    uristr.length());
//put the picture into the body of this part
            FormBodyPart fbp = new FormBodyPart("photo", new ByteArrayBody(
                    bos.toByteArray(), "image/jpeg", filename));
//add the part to the entity
            entity.addPart(fbp);
        }
//set the entity into the request
            httpPost.setEntity(entity);
//execute the request
        return exec(httpPost);
    }

protected synchronized static HttpResponse exec(HttpRequestBase base) throws ClientProtocolException, IOException{
    if (base != null)
//Execute the request
        return mHttpClient.execute(base);
    else
        return null;
}

private Bitmap resize(String path){
// create the options
    BitmapFactory.Options opts = new BitmapFactory.Options();

//just decode the file
    opts.inJustDecodeBounds = true;
    Bitmap bp = BitmapFactory.decodeFile(path, opts);

//get the original size
    int orignalHeight = opts.outHeight;
    int orignalWidth = opts.outWidth;
//initialization of the scale
    int resizeScale = 1;
//get the good scale
    if ( orignalWidth > maxWidth || orignalHeight > maxHeight ) {
       final int heightRatio = Math.round((float) orignalHeight / (float) maxHeight);
       final int widthRatio = Math.round((float) orignalWidth / (float) maxWidth);
       resizeScale = heightRatio < widthRatio ? heightRatio : widthRatio;
    }
//put the scale instruction (1 -> scale to (1/1); 8-> scale to 1/8)
    opts.inSampleSize = resizeScale;
    opts.inJustDecodeBounds = false;
//get the futur size of the bitmap
    int bmSize = (orignalWidth / resizeScale) * (orignalHeight / resizeScale) * 4;
//check if it's possible to store into the vm java the picture
    if ( Runtime.getRuntime().freeMemory() > bmSize ) {
//decode the file
        bp = BitmapFactory.decodeFile(path, opts);
    } else
        return null;
    return bp;
}
于 2013-04-23T15:43:12.583 回答
0

这个答案[基于另一个答案][1]，但我对该代码有一些问题，所以我发布了编辑和工作的代码。

我是这样做的：

BitmapFactory.Options options = new BitmapFactory.Options();
options.outWidth = 50; //pixels
options.outHeight = 50; //pixels
InputStream in = context.getContentResolver().openInputStream(data.getData()); // here, you need to get your context.
Bitmap bitmap = BitmapFactory.decodeStream(in, null, options);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] bitmapdata = baos.toByteArray();

请注意，数据是您用于获取文件的 Intent 返回的数据。如果您已经有文件路径，请使用它...

现在，当您创建 HTTP 实体时，添加：

 FormBodyPart fbp = new FormBodyPart("image", new ByteArrayBody(baos.toByteArray(), "image/jpeg", "image"));
 entity.addPart(fbp);

另外，请注意您需要一个MultipartEntity来上传文件。

于 2015-01-12T21:23:35.457 回答