Android的岗位高分辨率图像运行内存 [英] Android post high res image running out of memory

问题描述

好日子的开发伙伴。

我正忙着为Android从一个应用程序上传图片。结果
我也得到了它的工作（code将在下面跟随）。结果
但是，当我送大图像（10百万像素），我的应用程序崩溃与内存外的异常。结果
针对此解决方案是使用COM pression但如果我要发送的全尺寸图像？结果
我想，或许是甲流，但我不familair与流。也许URLConnection的可能帮助，但我真的不知道。结果

我给的文件名文件的名称[0至9999] .JPG
与图像日期的岗位价值被称为Filedata上
我给了岗位价值dropboxid一个UID

在code以下的工作，但我很想解决我的问题是prevents我发送高清图片。

亲切的问候

 尝试
{
    ByteArrayOutputStream BOS =新ByteArrayOutputStream（）;
    bitmap.com preSS（比较pressFormat.JPEG，100，BOS）;
    字节[]数据= bos.toByteArray（）;    HttpPost postRequest =新HttpPost（URL_SEND）;    ByteArrayBody BAB =新ByteArrayBody（数据，文件+垫（random.nextInt（9999）+ 1）+.JPG）;
    MultipartEntity reqEntity =新multipartEntity（HttpMultipartMode.BROWSER_COMPATIBLE）;
    reqEntity.addPart（Filedata上，BAB）;
    reqEntity.addPart（dropboxId，新StringBody（URLEn coder.en code（UID）））;
    postRequest.setEntity（reqEntity）;    HTT presponse响应= httpClient.execute（postRequest）;
    的BufferedReader读者=新的BufferedReader（新的InputStreamReader（response.getEntity（）的getContent（），UTF-8）。）;
    串sResponse;
    StringBuilder的S =新的StringBuilder（）;    而（（sResponse = reader.readLine（））！= NULL）
    {
        S = s.append（sResponse）;
    }    如果（D）Log.i（E发送回应：\\ n+ S）;
}
赶上（例外五）
{
    如果（D）Log.e（E，错误而发：+ e.getMessage（））;
    返回错误;
}
 

解决方案

在使用 ByteArrayOutputStream ，然后调用 #toByteArray（）您有效的一倍的内存量的JPEG使用。 ByteArrayOutputStream 保持与EN codeD JPEG和内部阵​​列，当你调用 #toByteArray（）它分配一个新阵列和放大器;从内部缓冲区拷贝数据。

考虑编码大的位图到一个临时文件和放大器;使用的FileOutputStream 和的FileInputStream 为en code和发送图像。

如果没有上传 - 您的应用程序在内存中的只是巨大的位图我假设生存很好

编辑： FileBody

 文件IMG =新的文件（这是你把你的图片的路径）
ContentBody CB =新FileBody（IMG，文件+垫（random.nextInt（9999）+ 1）+.JPG，图像/ JPG，NULL）;
MultipartEntity reqEntity =新multipartEntity（HttpMultipartMode.BROWSER_COMPATIBLE）;
reqEntity.addPart（Filedata上，CB）;
reqEntity.addPart（dropboxId，新StringBody（URLEn coder.en code（UID）））;
 

Good day fellow developers.

I'm busy for android to upload images from a app.
I also got it working (code will follow below).
But when i send large images (10 megapixels) my app crashes with an out-of-memory exception.
A solution for this is to use compression but what if i want to send the full size image?
I think perhaps something with a stream but i'm not familair with streams. Perhaps urlconnection might help to but i really have no idea.

I give the filename the name File[0 to 9999].jpg The post value with the image date is called Filedata I give a UID for the post value dropboxid

The code below works but i would love to solve my problem that prevents me from sending high res images.

kind regards

try
{
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    bitmap.compress(CompressFormat.JPEG, 100, bos);
    byte[] data = bos.toByteArray();

    HttpPost postRequest = new HttpPost(URL_SEND);

    ByteArrayBody bab = new ByteArrayBody(data, "File" + pad(random.nextInt(9999) + 1) + ".jpg");
    MultipartEntity reqEntity = new multipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
    reqEntity.addPart("Filedata", bab);
    reqEntity.addPart("dropboxId", new StringBody(URLEncoder.encode(uid)));
    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);
    }

    if(d) Log.i(E, "Send response:\n" + s);
}
catch (Exception e)
{
    if(d) Log.e(E, "Error while sending: " + e.getMessage());
    return ERROR;
}

解决方案

When using ByteArrayOutputStream and then calling #toByteArray() you've effectively doubled the amount of memory the JPEG is using. ByteArrayOutputStream keeps an internal array with the encoded JPEG and when you call #toByteArray() it allocates a new array & copies the data from the internal buffer.

Consider encoding large bitmaps to a temporary file & using FileOutputStream and FileInputStream to encode and send the image.

Without "uploading" - your app survives "nicely" with the just the huge bitmap in memory I assume?

Edit: FileBody

File img = new File(this is where you put the path of your image)
ContentBody cb = new FileBody(img, "File" + pad(random.nextInt(9999) + 1) + ".jpg", "image/jpg", null);
MultipartEntity reqEntity = new multipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
reqEntity.addPart("Filedata", cb);
reqEntity.addPart("dropboxId", new StringBody(URLEncoder.encode(uid)));

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