我正在尝试上传图像的凌空PUT请求，因为httpEntity现在已被弃用，我不得不做一些其他的研究，我遇到了这些解决方案，并尝试将它们实现到我的代码中： 1. https://gist.github.com/anggadarkprince/a7c536da091f4b26bb4abf2f92926594 2. How to send multipart request using Volley without HttpEntity? 3. Working POST Multipart Request with Volley and without HttpEntity 但我仍然无法上传我的图像。我要上传的图像要么从相机中捕获，要么在图库中选择，并在onClick上执行。
ProfileSetting.java
public class ProfileSetting extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
private ImageView CustomerIcon;
private Button confirm_button;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile_setting);
CustomerIcon = (ImageView) findViewById(R.id.CustomerIcon);
confirm_button = (Button) findViewById(R.id.confirm_button);
CustomerIcon.setOnClickListener(new ImageView.OnClickListener(){
public void onClick(View v){
showPickImageDialog();
}
});
confirm_button.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View view) {
//PUT VOLLEY
saveProfileAccount();
}
});
}
private void showPickImageDialog() {
AlertDialog.Builder builderSingle = new AlertDialog.Builder(ProfileSetting.this);
builderSingle.setTitle("Choose Profile Icon");
final ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
ProfileSetting.this,
android.R.layout.select_dialog_singlechoice);
arrayAdapter.add("Gallery");
arrayAdapter.add("Camera");
builderSingle.setNegativeButton(
"cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builderSingle.setAdapter(
arrayAdapter,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0:
Intent pickPhoto = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(pickPhoto, 1);
break;
case 1:
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePicture, 0);
break;
}
}
});
builderSingle.show();
}
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch(requestCode) {
case 0:
if(resultCode == RESULT_OK){
Uri selectedImage = imageReturnedIntent.getData();
CustomerIcon.setImageURI(selectedImage);
}
break;
case 1:
if(resultCode == RESULT_OK){
Uri selectedImage = imageReturnedIntent.getData();
CustomerIcon.setImageURI(selectedImage);
}
break;
}
}
private void saveProfileAccount() {
// loading or check internet connection or something...
// ... then
String url = "https://url to put image to";
SharedPreferences sp1=this.getSharedPreferences("FINALTOKEN", Context.MODE_PRIVATE);
final String finalToken = sp1.getString("FINALTOKEN","");
VolleyMultipartRequest multipartRequest = new VolleyMultipartRequest(Request.Method.PUT, url, new Response.Listener<NetworkResponse>() {
@Override
public void onResponse(NetworkResponse response) {
String resultResponse = new String(response.data);
try {
JSONObject result = new JSONObject(resultResponse);
String status = result.getString("status");
String message = result.getString("message");
if (status.equals(Constant.REQUEST_SUCCESS)) {
// tell everybody you have succeed upload image and post strings
Log.i("Messsage", message);
} else {
Log.i("Unexpected", message);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
NetworkResponse networkResponse = error.networkResponse;
String errorMessage = "Unknown error";
if (networkResponse == null) {
if (error.getClass().equals(TimeoutError.class)) {
errorMessage = "Request timeout";
} else if (error.getClass().equals(NoConnectionError.class)) {
errorMessage = "Failed to connect server";
}
} else {
String result = new String(networkResponse.data);
try {
JSONObject response = new JSONObject(result);
String status = response.getString("status");
String message = response.getString("message");
Log.e("Error Status", status);
Log.e("Error Message", message);
if (networkResponse.statusCode == 404) {
errorMessage = "Resource not found";
} else if (networkResponse.statusCode == 401) {
errorMessage = message+" Please login again";
} else if (networkResponse.statusCode == 400) {
errorMessage = message+ " Check your inputs";
} else if (networkResponse.statusCode == 500) {
errorMessage = message+" Something is getting wrong";
}
} catch (JSONException e) {
e.printStackTrace();
}
}
Log.i("Error", errorMessage);
error.printStackTrace();
}
}) {
@Override
public Map<String,String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers= new HashMap<>();
headers.put("Authorization",finalToken);
return headers;
}
@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", ImageConverter.getFileDataFromDrawable(getBaseContext(), CustomerIcon.getDrawable()), "image/jpeg"));
return params;
}
};
VolleySingleton.getInstance(getBaseContext()).addToRequestQueue(multipartRequest);
}
}
VolleyMultipartRequest.java和VolleySingleton.java我使用的是与第一个链接相同的类。
我的错误首先是我无法在if语句中解析符号'Constant'：
if (status.equals(Constant.REQUEST_SUCCESS))
所以我尝试评论该语句，运行代码后出现以下错误：
BasicNetwork.performRequest: Unexpected response code 500 for https://my url
W/System.err: org.json.JSONException: No value for status
我不确定是什么原因导致我的问题，请帮助，谢谢！
答案 0 :(得分：0)
这是使用Volley Android上传文件的简单解决方案和完整示例
1）Gradle Import
compile 'dev.dworks.libs:volleyplus:+'
2）现在创建一个类RequestManager
public class RequestManager {
private static RequestManager mRequestManager;
/**
* Queue which Manages the Network Requests :-)
*/
private static RequestQueue mRequestQueue;
// ImageLoader Instance
private RequestManager() {
}
public static RequestManager get(Context context) {
if (mRequestManager == null)
mRequestManager = new RequestManager();
return mRequestManager;
}
/**
* @param context application context
*/
public static RequestQueue getnstance(Context context) {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(context);
}
return mRequestQueue;
}
}
3）现在创建一个类来处理上传File WebService的请求
public class WebService {
private RequestQueue mRequestQueue;
private static WebService apiRequests = null;
public static WebService getInstance() {
if (apiRequests == null) {
apiRequests = new WebService();
return apiRequests;
}
return apiRequests;
}
public void updateProfile(Context context, String doc_name, String doc_type, String appliance_id, File file, Response.Listener<String> listener, Response.ErrorListener errorListener) {
SimpleMultiPartRequest request = new SimpleMultiPartRequest(Request.Method.POST, "YOUR URL HERE", listener, errorListener);
// request.setParams(data);
mRequestQueue = RequestManager.getnstance(context);
request.addMultipartParam("token", "text", "tdfysghfhsdfh");
request.addMultipartParam("parameter_1", "text", doc_name);
request.addMultipartParam("dparameter_2", "text", doc_type);
request.addMultipartParam("parameter_3", "text", appliance_id);
request.addFile("document_file", file.getPath());
request.setFixedStreamingMode(true);
mRequestQueue.add(request);
}
}
4）现在调用方法Like This to Hit the service
public class Main2Activity extends AppCompatActivity implements Response.ErrorListener, Response.Listener<String>{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
Button button=(Button)findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
uploadData();
}
});
}
private void uploadData() {
WebService.getInstance().updateProfile(getActivity(), "appl_doc", "appliance", "1", mChoosenFile, this, this);
}
@Override
public void onErrorResponse(VolleyError error) {
}
@Override
public void onResponse(String response) {
//Your response here
}
}
mChoosenFile是您的图片文件
答案 1 :(得分：0)
首先使用以下代码将图像位图转换为base64字符串：
public String getStringImage(Bitmap bmp){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] imageBytes = baos.toByteArray();
String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
return encodedImage;
}
然后创建类似下面的PUT请求并将base64字符串作为请求的参数传递
url = "http://example.com";
StringRequest putRequest = new StringRequest(Request.Method.PUT, url,
new Response.Listener<String>()
{
@Override
public void onResponse(String response) {
// response
Log.d("Response", response);
}
},
new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error) {
// error
Log.d("Error.Response", response);
}
}
) {
@Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<String, String> ();
params.put("imageString", base64String);
return params;
}
};
queue.add(putRequest);
如果您在实施截击请求时遇到任何困难，请参阅Android Volley Tutorial。