如何在android中使用Volley库上传文件？

Posted 2023-04-13

【中文标题】如何在android中使用Volley库上传文件？

【英文标题】：How to upload file using Volley library in android?

【发布时间】：2015-11-22 15:07:16

【问题描述】：

我已经有一个 Request<JSONObject> 的子类，用于将 http post 发送到服务器。问题是，我不知道如何为文件添加参数。将字符串发布到服务器很容易。但我需要将文件添加为不同的参数。我该怎么做？

public class AddNewPetRequest extends Request<JSONObject> 

    private Response.Listener<JSONObject> listener;

    public AddNewPetRequest(String url, Map<String, String> params,
                                Response.Listener<JSONObject> reponseListener, Response.ErrorListener errorListener) 
        super(Request.Method.GET, url, errorListener);
        this.listener = reponseListener;
        this.params = params;
    

    public AddNewPetRequest(int method, String url, Map<String, String> params,
                                Response.Listener<JSONObject> reponseListener, Response.ErrorListener errorListener) 
        super(method, url, errorListener);
        this.listener = reponseListener;
        this.params = params;
    

    protected Map<String, String> getParams()
            throws com.android.volley.AuthFailureError 
        return params;
    ;

    @Override
    protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) 
        try 
            String jsonString = new String(response.data,
                    HttpHeaderParser.parseCharset(response.headers));
            return Response.success(new JSONObject(jsonString),
                    HttpHeaderParser.parseCacheHeaders(response));
         catch (UnsupportedEncodingException e) 
            return Response.error(new ParseError(e));
         catch (JSONException je) 
            return Response.error(new ParseError(je));
        
    

    @Override
    protected void deliverResponse(JSONObject response) 
        // TODO Auto-generated method stub
        listener.onResponse(response);
    

更新问题： 我在***中遵循了其中一个答案的模式，我想出了这个实现：

public class MultipartRequest extends Request<String> 

private MultipartEntity entity = new MultipartEntity();

private final Response.Listener<String> mListener;
private HashMap<String, String> mParams;


public MultipartRequest(String url, Response.ErrorListener errorListener, Response.Listener<String> listener)

    super(Method.POST, url, errorListener);
    mListener = listener;

    buildMultipartEntity();


private void buildMultipartEntity()

    entity.addPart("profile_picture", new FileBody(new File("/storage/emulated/0/Pictures/VSCOCam/2015-07-31 11.55.14 1.jpg")));
    try
    
        entity.addPart("user_id", new StringBody("15"));
        entity.addPart("name", new StringBody("Bogs"));
        entity.addPart("gender", new StringBody("Male"));
        entity.addPart("date_birth", new StringBody("1999-12-5"));
        entity.addPart("breed", new StringBody("monkey"));
    
    catch (UnsupportedEncodingException e)
    
        VolleyLog.e("UnsupportedEncodingException");
    


@Override
public String getBodyContentType()

    return entity.getContentType().getValue();


@Override
public byte[] getBody() throws AuthFailureError

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    try
    
        entity.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);
   

当我将此请求添加到我的请求队列时，它以 com.android.volley.TimeoutError 响应，但如果检查数据库，请求将执行并将项目添加到表中，但个人资料图片上传只有 1 个字节的大小。另一个问题，我的数据库项添加了两次。

【问题讨论】：

在这里查看：- ***.com/a/19981901/4018207

您可以阅读my question and answer here。希望这会有所帮助！

@MamataGelanee 如何获得 MultipartEntity 类？我通过我的 gradle compile group: 'org.apache.httpcomponents' , name: 'httpclient-android' , version: '4.3.5.1' 导入这个，但似乎 MultipartEntity 仍然丢失。跨度>

@Earwin delos Santos ：尝试将所有库添加到 gradle -> apache-mime4j、httpclient、httpcore 和 httpmime。我认为“MultipartEntity”在 httpmime 中。

添加这个：'org.apache.httpcomponents:httpmime:4.5'

【参考方案1】：

希望这个方法对你有帮助：

public int uploadFile(String sourceFileUri, String fileName)

    String upLoadServerUri = "your_api_url";

    HttpURLConnection conn = null;
    DataOutputStream dos = null;  
    String lineEnd = "\r\n";
    String twoHyphens = "--";
    String boundary = "*****";
    int bytesRead, bytesAvailable, bufferSize;
    byte[] buffer;
    int maxBufferSize = 1 * 1024 * 1024;
    File sourceFile = new File(sourceFileUri); 
    //errMsg=Environment.getExternalStorageDirectory().getAbsolutePath();
    if (!sourceFile.isFile())
    
        Log.e("uploadFile", "Source File Does not exist");
        return 0;
    
    try 
        // open a URL connection to the Servlet
        FileInputStream fileInputStream = new FileInputStream(sourceFile);
        URL url = new URL(upLoadServerUri);
        conn = (HttpURLConnection) url.openConnection(); // Open a HTTP  connection to  the URL
        conn.setDoInput(true); // Allow Inputs
        conn.setDoOutput(true); // Allow Outputs
        conn.setUseCaches(false); // Don't use a Cached Copy
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Connection", "Keep-Alive");
        conn.setRequestProperty("ENCTYPE", "multipart/form-data");
        conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
        conn.setRequestProperty("uploaded_file", fileName);
        //conn.setRequestProperty("pid", "4");
        dos = new DataOutputStream(conn.getOutputStream());

        dos.writeBytes(twoHyphens + boundary + lineEnd); 
        dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""+ fileName + "\"" + lineEnd);
        dos.writeBytes(lineEnd);

        bytesAvailable = fileInputStream.available(); // create a buffer of  maximum size

        bufferSize = Math.min(bytesAvailable, maxBufferSize);
        buffer = new byte[bufferSize];

        // read file and write it into form...
        bytesRead = fileInputStream.read(buffer, 0, bufferSize);  

        while (bytesRead > 0) 
            dos.write(buffer, 0, bufferSize);
            bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);                
        

        // send multipart form data necesssary after file data...
        dos.writeBytes(lineEnd);
        dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

        // Responses from the server (code and message)
        serverResponseCode = conn.getResponseCode();
        String serverResponseMessage = conn.getResponseMessage();

        Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode);
        if(serverResponseCode != 200)
        
            getActivity().runOnUiThread(new Runnable()
            
                public void run() 
                    Toast.makeText(context, "Il y a une erreur l'hors du trasfert de l'image.", Toast.LENGTH_SHORT).show();
                
            );  
        

        //close the streams //
        fileInputStream.close();
        dos.flush();
        dos.close();

     catch (MalformedURLException ex)   
        // dialog.dismiss();  
        ex.printStackTrace();
        Toast.makeText(context, "MalformedURLException", Toast.LENGTH_SHORT).show();
        Log.e("Upload file to server", "error: " + ex.getMessage(), ex);  
     catch (Exception e) 
        //  dialog.dismiss();  
        e.printStackTrace();
        Toast.makeText(context,errMsg+ "Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show();
        Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);  
    
    //  dialog.dismiss();         
    return serverResponseCode;  

【参考方案2】：

我们需要执行一个多部分请求。但问题是 volley 不直接支持多部分请求。这就是为什么我们需要创建自定义排球请求。

使用 VolleyMultipartRequest 创建一个 java 类，并在该文件中编写以下代码。

private void uploadImageFile(File file) throws IOException 

file  = new Compressor(this).compressToFile(file);
RequestBody requestFile = RequestBody.create(MediaType.parse("image/*"), file);
// MultipartBody.Part is used to send also the actual filename
MultipartBody.Part body = MultipartBody.Part.createFormData("avatar", file.getName(), requestFile);

ApiConfig getResponse = AppConfig.getRetrofit().create(ApiConfig.class);
Call<ServerResponse> call = getResponse.uploadFile("Bearer "+jsonToken, body);
call.enqueue(new Callback< ServerResponse >() 
    @Override
    public void onResponse(@NonNull Call < ServerResponse > call, @NonNull retrofit2.Response<ServerResponse> response) 
        ServerResponse serverResponse = response.body();

        if (serverResponse.getData() != null) 
            Log.e(TAG, "Response is "+ serverResponse.getData());
           loading.setVisibility(View.GONE);
            Toast.makeText(ProfileSettings.this, "Avatar updated", Toast.LENGTH_SHORT).show();
         else 
            Log.e("Response", String.valueOf(serverResponse));
        
    


    @Override
    public void onFailure(Call < ServerResponse > call, Throwable t) 
        Log.e(TAG, t.getMessage());
    
);
   // Log.e(TAG, "request is "+call.request().body()+" and "+call.request().headers());