如何在安卓的凌空抽射中使用多部分上传多张图片

Question

我想使用多部分将多个图像上传到服务器，我没有获得正确的代码，任何人都可以帮助我解决我的问题。如果我以base64格式发送，后端团队无法获取我的图像。这就是我选择多部分的原因。凌空或异步任务。

我从这个链接尝试了这段代码

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

但是多个图像我不知道该怎么做。

Main.Java

package com.getspot.getspot.imagerestapi;
public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main7);
findViewById(R.id.buttonUploadImage).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//if everything is ok we will open image chooser
Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, 100);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 100 && resultCode == RESULT_OK && data != null) {
//getting the image Uri
Uri imageUri = data.getData();
try {
//getting bitmap object from uri
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
//displaying selected image to imageview
imageView.setImageBitmap(bitmap);
//calling the method uploadBitmap to upload image
uploadBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public byte[] getFileDataFromDrawable(Bitmap bitmap) {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 80, byteArrayOutputStream);
Log.i("AS","--"+byteArrayOutputStream.toByteArray());
return byteArrayOutputStream.toByteArray();
}
private void uploadBitmap(final Bitmap bitmap) {
//getting the tag from the edittext
final String tags = editTextTags.getText().toString().trim();
//our custom volley request
VolleyMultipartRequest volleyMultipartRequest = new VolleyMultipartRequest(Request.Method.POST, ServerUtils.Gs_Clock_Image,
new Response.Listener<NetworkResponse>() {
@Override
public void onResponse(NetworkResponse response) {
try {
JSONObject obj = new JSONObject(new String(response.data));
Log.i("AS","obj--"+obj);
Toast.makeText(getApplicationContext(), obj.getString("message"), Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.i("AS","error--"+error);
Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();
}
}) {
/*
* If you want to add more parameters with the image
* you can do it here
* here we have only one parameter with the image
* which is tags
* */
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("gs_userId", "6");
return params;
}
/*
* Here we are passing image by renaming it with a unique name
* */
@Override
protected Map<String, DataPart> getByteData() {
Map<String, DataPart> params = new HashMap<>();
long imagename = System.currentTimeMillis();
Log.i("AS","imagename--"+imagename);
Log.i("AS","getFileDataFromDrawable(bitmap)--"+getFileDataFromDrawable(bitmap));
params.put("gs_task_image", new DataPart(imagename + ".png", getFileDataFromDrawable(bitmap)));
return params;
}
};
//adding the request to volley
Volley.newRequestQueue(this).add(volleyMultipartRequest);
}
}

备注：在gs_text_image传递字节数组时，我如何发送多个图像。我提到了上面的链接。请帮助我

Answer 1

我将向您展示我是如何做到的(特殊情况 ofc，但它可能会给你一个想法(

因此，首先您需要如下所示的方法接口：

@Multipart
@POST(RestClient.UPLOAD_PICTURES_FOR_ORDER)
Call<YourTypeOfResponse> uploadPictures(@Part("images[]") RequestBody[] file, @Part MultipartBody.Part[] images);

现在，您必须为请求准备您拥有的文件(图像(

private void multiparts(){
RequestBody reqFullPicFile;
MultipartBody.Part filepart;
RequestBody filename;
images = new MultipartBody.Part[files.size()];
filenameImages = new RequestBody[files.size()];
for (int file = 0; file < files.size(); file++){
reqFullPicFile = RequestBody.create(MediaType.parse("multipart/form-data"), files.get(file));
filepart = MultipartBody.Part.createFormData("full_picture", files.get(file).getName(), reqFullPicFile);
filename = RequestBody.create(MediaType.parse("text/plain"), files.get(file).getName());
images[file] = filepart;
filenameImages[file] = filename;
}
}

最后，使用创建的Multiparts发出请求(在本例中为images & filenameImages(

private void uploadPicturesReq(){
if (files != null) {
multiparts();
RestClient.getApi().uploadPictures(filenameImages, images)
.enqueue(new Callback<PicturesResponse>() {
@Override
public void onResponse(Call<PicturesResponse> call, Response<PicturesResponse> response) {
if (response.isSuccessful() && response.code() == 200) {
// here you can handle the response from server
}
}
@Override
public void onFailure(Call<PicturesResponse> call, Throwable t) {
Log.e(TAG, "-=onFailure=- " + t.getMessage(), t);
}
});
}
}