如何在本地android中将音频和图像作为多部分/格式化数据发布？

Question

我想发布这样的表格数据，

​

​

哪里,

1. ApiKey、userid、白蛋白、music_name、singer_name是相应值都是文本类型的键。
2. music_cover和music_file是图像文件和音频文件作为它们的值的关键。

所有的值都是不可空的。也就是说，必须将所有值传递给服务器才能获得成功的响应。

所以，总之，我有一堆文本，一个音频和一个图像可以上传到服务器使用web服务从android。

我选择的图像和音频使用选择器，所以我有他们的文件路径。

请指导我的过程上传音频和图像使用多部分从android。

它让我彻夜未眠，却没有任何缓刑。

Answer 1

在这里，我使用Volley创建了一个示例，所以首先我们必须构建一个RestApiMultiPartRequests.class，所以这里我创建了这样的示例

私有类RestApiMultiPartRequests扩展请求{

private final Map<String, String> mStringParts;
private final Map<String, File> mFileParts;
private MultipartEntityBuilder mBuilder;
private final Response.Listener<T> mListener;

public RestApiMultiPartRequests(String url,
                                Map<String, String> stringParts,
                                Map<String, File> fileParts,
                                Response.Listener<T> listener,
                                Response.ErrorListener errorListener) {
    super(Method.POST, url, errorListener);
    mListener = listener;
    mStringParts = stringParts;
    mFileParts = fileParts;
    buildMultipartEntity();
}

private void buildMultipartEntity() {
    if (mBuilder != null) {
        mBuilder = null;
    }
    mBuilder = MultipartEntityBuilder.create();
    mBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
    mBuilder.setBoundary("_____" + Long.toString(System.currentTimeMillis()) + "_____");
    mBuilder.setCharset(Consts.UTF_8);
    if (mStringParts != null) {
        for (Map.Entry<String, String> entry : mStringParts.entrySet()) {
            mBuilder.addTextBody(entry.getKey(), entry.getValue(), ContentType.create("text/plain", Charset.forName("UTF-8")));
        }
    }

    Log.e("Size", "Size: " + mFileParts.size());
    for (Map.Entry<String, File> entry : mFileParts.entrySet()) {
        ContentType imageContentType = ContentType.create("image/*");//MULTIPART_FORM_DATA;
        Log.d("", "Key " + entry.getKey());
        Log.d("", "Value " + entry.getValue());
        Log.d("", "Name " + entry.getValue().getName());
        //"userfile"
        mBuilder.addBinaryBody(entry.getKey(), entry.getValue(), imageContentType, entry.getValue().getName());
    }
}

@Override
public String getBodyContentType() {
    return mBuilder.build().getContentType().getValue();
}

@Override
public byte[] getBody() {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    try {
        mBuilder.build().writeTo(bos);
    } catch (IOException e) {
        e.printStackTrace();
    }

    return bos.toByteArray();
}


public HttpEntity getEntity() {
    return mBuilder.build();
}


@SuppressWarnings("unchecked")
@Override
protected Response<T> parseNetworkResponse(NetworkResponse response) {
    try {
        String jsonString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
        return (Response<T>) Response.success(jsonString, HttpHeaderParser.parseCacheHeaders(response));
    } catch (UnsupportedEncodingException e) {
        return Response.error(new ParseError(e));
    }
}

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

}


}

使用这个类，我们可以像这样构建一个请求

 private void UploadImage() {

    ServiceCall.RestApiMultiPartRequests<String> restApiMultiPartRequest =
            new ServiceCall.RestApiMultiPartRequests<String>(url/*YOUR SERVICE URL*/, hashMap /* HASHMAP OF STRING */, fileparts  /*HASH MAP OF FILE AND STRING */, new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                   /*   HANDEL YOUR SUCCESS RESPONSE **/
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    // Handle your error types accordingly.For Timeout & No
                    // connection error, you can show 'retry' button.
                    // For AuthFailure, you can re login with user
                    // credentials.
                    // For ClientError, 400 & 401, Errors happening on
                    // client side when sending api request.
                    // In this case you can check how client is forming the
                    // api and debug accordingly.
                    // For ServerError 5xx, you can do retry or handle
                    // accordingly.


                      /**  HANDLE YOUR ERRORS */
                }
            }) {

                @Override
                public Map<String, String> getHeaders() throws AuthFailureError {
                    Map<String, String> params = new HashMap<String, String>();
                    params.put("Authorization","YOUR AUTHANTICATION TOKEN IF REQUIRED");
                    return params;
                }

                @Override
                protected Map<String, String> getParams() throws AuthFailureError {
                    Map<String, String> params = new HashMap<String, String>();
                    return params;
                }
            };

    restApiMultiPartRequest.setRetryPolicy(new DefaultRetryPolicy(0, 1, 2));//10000
    VOLLEY_INSTANCE.addToRequestQueue(restApiMultiPartRequest);
}

这里hashmap是HashMap<String, String> hashMap，fileparts是HashMap<String, File> fileparts;

因此，使用String key和String value的参数添加到hashmap中，使用String键和File Value的参数添加到fileparts中。