Android 相机图像未上传到服务器。使用多部分数据 Http post

Posted 2023-04-17

【中文标题】Android 相机图像未上传到服务器。使用多部分数据 Http post

【英文标题】：Android camera image not uploaded to server . Using Multipart data Http post

【发布时间】：2014-08-27 04:15:02

【问题描述】：

我正在尝试使用 volley 的多部分数据 http post 从相机和画廊上传图像，但是从相机拍摄的图像没有上传，而从画廊上传。

 private void startCamera() 

    Intent imageIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
    imageIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
    // start the image capture Intent
    startActivityForResult(imageIntent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);

 
 @Override
 public void onActivityResult(int requestCode, int resultCode, Intent data)
 
    switch (requestCode) 

        case CAMERA_CAPTURE_IMAGE_REQUEST_CODE:
            if(resultCode== Activity.RESULT_OK)
                previewCapturedImage();
            else
                Toast.makeText(getActivity(),"User cancelled image capture",   Toast.LENGTH_SHORT).show();
            
            break;
 

 private void previewCapturedImage() 
    try 
        // bimatp factory
        BitmapFactory.Options options = new BitmapFactory.Options();
        // downsizing image as it throws OutOfMemory Exception for larger
        // images
        options.inSampleSize = 8;
        Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(),
                options);
        filePath=fileUri.getPath();
        Matrix matrix = new Matrix();
        matrix.postRotate(90);

        Bitmap rotatedBitmap = Bitmap.createBitmap(bitmap, 0, 0, options.outWidth, options.outHeight, matrix, true);

        postImageView.setImageBitmap(rotatedBitmap);
        ((TextView)appView.findViewById(R.id.deleteBtn)).setVisibility(View.VISIBLE);

     catch (NullPointerException e) 
        e.printStackTrace();
    


public  void postFeed(String commentString)
    RequestQueue mqueue = Volley.newRequestQueue(getActivity());
    Map<String, String> params = new HashMap<String, String>();
    params.put("text",commentString);
    params.put("user_id",SettingsHelper.getInstance(getActivity()).getPreference("id"));
    TSUServerRequest.postFeed(getActivity(),mqueue,params,new File(filePath),new Response.Listener<String>() 
        @Override
        public void onResponse(String s) 
            Log.d("a","bscljk");
            filePath="";
            fileUri= null;
            //Toast.makeText(getActivity(),"Success",Toast.LENGTH_LONG).show();
        
    ,new Response.ErrorListener() 
        @Override
        public void onErrorResponse(VolleyError volleyError) 
            volleyError.printStackTrace();

        
    );


  public static void postFeed(Context context,RequestQueue queue,Map<String, String> params,File file,
                            Listener<String> listener, ErrorListener errorListener)
    if (TSUServerRequest.checkForConnection(context)) 
        String url =API_CREATE_POST;
        MultiPartRequest myReq = new MultiPartRequest(url,errorListener,listener,file,params);
        queue.add(myReq);
        queue.start();
    else
        Toast.makeText(context, "No Internet!Please try again!", Toast.LENGTH_LONG).show();
    

////MultipartRequest.java

public class MultiPartRequest extends Request<String> 

MultipartEntityBuilder entity = MultipartEntityBuilder.create();
HttpEntity httpentity;
private static final String FILE_PART_NAME = "picture";

private final Response.Listener<String> mListener;
private final File mFilePart;
private final Map<String, String> mStringPart;

public MultiPartRequest(String url, Response.ErrorListener errorListener,
                        Response.Listener<String> listener, File file,
                        Map<String, String> mStringPart) 
    super(Method.POST, url, errorListener);

    mListener = listener;
    mFilePart = file;
    this.mStringPart = mStringPart;
    entity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
    buildMultipartEntity();


public void addStringBody(String param, String value) 
    mStringPart.put(param, value);


private void buildMultipartEntity() 
    entity.addPart(FILE_PART_NAME, new FileBody(mFilePart));
    for (Map.Entry<String, String> entry : mStringPart.entrySet()) 
        entity.addTextBody(entry.getKey(), entry.getValue());
    


@Override
public String getBodyContentType() 
    return httpentity.getContentType().getValue();


@Override
public byte[] getBody() throws AuthFailureError 
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    try 
        httpentity = entity.build();
        httpentity.writeTo(bos);
     catch (IOException e) 
        VolleyLog.e("IOException writing to ByteArrayOutputStream");
    
    return bos.toByteArray();


@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) 
    return Response.success("Uploaded", getCacheEntry());


@Override
protected void deliverResponse(String response) 
    mListener.onResponse(response);

【参考方案1】：

图片未上传的原因是尺寸。 立即从相机拍摄的图像文件太大，因此需要压缩。 从画廊中挑选的相同文件会被上传，因为画廊会在内部压缩文件。

public File compress()

    File file = new File(filePath);

    try 
        Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath());
        if(flagCamera==1) 
            flagCamera=0;
            compressedFile = new File(Environment.getExternalStorageDirectory().toString() + "/compressed" + file.getName());
            FileOutputStream out = new FileOutputStream(compressedFile);
            bitmap.compress(Bitmap.CompressFormat.JPEG,70,out);
            out.flush();
            out.close();
        else
            return file;
        
     catch (FileNotFoundException e1) 
        e1.printStackTrace();
     catch (IOException e) 
        e.printStackTrace();
    
    return compressedFile;



public void postFeed(String commentString) 
    RequestQueue mqueue = Volley.newRequestQueue(getActivity());
    Map<String, String> params = new HashMap<String, String>();
    params.put("access_token", SettingsHelper.getInstance(getActivity()).getPreference("auth_token"));
    params.put("text", commentString);
    params.put("user_id", SettingsHelper.getInstance(getActivity()).getPreference("id"));
    params.put("privacy", Integer.toString(1));
    TSUServerRequest.postFeed(getActivity(), mqueue, params, compress(), new Response.Listener<String>() 
        @Override
        public void onResponse(String s) 
            Log.d("a", "bscljk");
            filePath = "";
            fileUri = null;
            //Toast.makeText(getActivity(),"Success",Toast.LENGTH_LONG).show();
        
    , new Response.ErrorListener() 
        @Override
        public void onErrorResponse(VolleyError volleyError) 
            volleyError.printStackTrace();

        
    );

【讨论】：

对我的问题有任何想法吗？ ***.com/questions/57598276/…