如何在安卓中使用凌空开机自检方法传递字符串和文件数据?

Question

我正在使用 Volley 发出服务器请求，但我知道 volley 不会在 POST 请求中从 getParams() 方法传递参数，所以现在我通过将所有参数/值与 url 连接起来传递这些数据，就像波纹管一样。

String url = "http://myweb/api/work?"+param1+"="+value;

现在的问题是它仅适用于文本数据，我可以成功发出请求并且所有参数都传递给服务器，但现在我必须使用相同的 API 上传一些图像文件。

如何使用 Volley POST 方法传递文件和字符串数据？

以下是我尝试但没有成功的解决方案。 https://gist.github.com/anggadarkprince/a7c536da091f4b26bb4abf2f92926594#file-volleymultipartrequest-java

https://www.simplifiedcoding.net/android-volley-tutorial-to-upload-image-to-server/

编辑以下是我当前的请求代码：

StringRequest request = new StringRequest(Request.Method.POST, uri + param, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
dismissProgressDialog();
printResponse(response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
dismissProgressDialog();
error.printStackTrace();
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<>();
headers.put("key", key);
headers.put("tkey", tkey);
headers.put("Content-Type", "application/multipart");
return headers;
}
};

Answer 1

使用以下代码

VolleyMultipartRequest multipartRequest = new VolleyMultipartRequest(Request.Method.POST, url, new Response.Listener<NetworkResponse>() {
@Override
public void onResponse(NetworkResponse response) {
String resultResponse = new String(response.data);
// parse success output
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {                
error.printStackTrace();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<>();
params.put("name", "Sam");
params.put("location", "India");
params.put("about", "UI/UX Designer");
params.put("contact", "[e-mail]");
return params;
}
@Override
protected Map<String, DataPart> getByteData() {
Map<String, DataPart> params = new HashMap<>();
// file name could found file base or direct access from real path
// for now just get bitmap data from ImageView
params.put("avatar", new DataPart("file_avatar.jpg", AppHelper.getFileDataFromDrawable(getBaseContext(), mAvatarImage.getDrawable()), "image/jpeg"));
params.put("cover", new DataPart("file_cover.jpg", AppHelper.getFileDataFromDrawable(getBaseContext(), mCoverImage.getDrawable()), "image/jpeg"));
return params;
}
};
VolleySingleton.getInstance(getBaseContext()).addToRequestQueue(multipartRequest);

Answer 2

VolleyMultipartRequest multipartRequest = new VolleyMultipartRequest(com.android.volley.Request.Method.POST, url, new Response.Listener<NetworkResponse>() {
@Override
public void onResponse(NetworkResponse response) {
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
})
{
//pass String parameters here
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<>();
params.put("category", "image");
params.put("p_name", "myImage");
return params;
}
//pass header
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<String, String>();
headers.put("key", key);
headers.put("tkey", tkey);
headers.put("Content-Type", "application/multipart");
return headers;
}
//pass file here (*/* - means you can pass any kind of file)
@Override
protected Map<String, VolleyMultipartRequest.DataPart> getByteData() {
Map<String, DataPart> up_params = new HashMap<>();
up_params.put("params", new DataPart(file_path, file_name, "*/*"));
return up_params;
}
};      
VolleySingleton.getInstance(getBaseContext()).addToRequestQueue(multipartRequest);