我有一个使用标准apache类的客户HTTP调用，但我正在尝试创建一个自定义的Volley类来处理这个问题。以下是标准调用的代码：
HttpURLConnection conn = (HttpURLConnection) new URL(strUrl).openConnection();
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setConnectTimeout(30000);
conn.setUseCaches(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Authorization", "Token " + m_apiKey);
conn.setRequestProperty("Accept", "text/plain , application/json");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + strBoundary);
conn.connect();
// **** Start content wrapper:
DataOutputStream request = new DataOutputStream(conn.getOutputStream());
request.writeBytes("\r\n--" + strBoundary + "\r\n");
request.writeBytes("Content-Disposition: form-data; name=\"" + attachmentName + "\";filename=\"" + imageFileName + "\"" + "\r\n");
request.writeBytes("Content-Type: image/jpeg " + "\r\n");
request.writeBytes("\r\n");
request.write(baos.toByteArray());
// **** End content wrapper:
request.writeBytes("\r\n--"+ strBoundary + "--\r\n");
// Flush output buffer:
request.flush();request.close();
不知道怎么做其余的但是这就是我对Volley无效的方法。我以前做过Multipart，但没有边界和这种奇怪的格式。
public class ImageMultiRequest extends StringRequest { final String BOUNDARY =“something”; final String crlf =“\ r \ n”; final String twoHyphens =“ - ”;
private final MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create();
private Response.Listener<String> mListener = null;
private Response.ErrorListener mEListener;
//
private final File mFilePart;
private Map<String, String> parameters;
private Map<String, String> header;
MultipartEntity entity = new MultipartEntity();
protected String apiKey;
ByteArrayOutputStream bos;
public ImageMultiRequest(String apiKey, String url, Listener<String> rListener, ErrorListener eListener, File file) {
super(Method.POST, url, rListener, eListener);
setShouldCache(false);
this.apiKey = apiKey;
this.bos = bos;
mListener = rListener;
mEListener = eListener;
mFilePart = file;
entityBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
entityBuilder.setBoundary(BOUNDARY);
buildMultipartEntity();
}
@Override
public String getBodyContentType() {
return "multipart/form-data; boundary=" + BOUNDARY + "; charset=utf-8";
}
/**
* Overrides the base class to add the Accept: application/json header
*/
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = super.getHeaders();
if (headers == null || headers.equals(Collections.emptyMap())) {
headers = new HashMap<String, String>();
}
headers.put("Content-Type", "multipart/form-data;boundary=" + BOUNDARY+ "; charset=utf-8");
headers.put("Connection", "Keep-Alive");
headers.put("Accept", "text/plain , application/json");
headers.put("Authorization", "Token " + apiKey);
return headers;
}
@Override
public byte[] getBody() throws AuthFailureError {
buildMultipartEntity();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
entityBuilder.build().writeTo(bos);
} catch (IOException e) {
VolleyLog.e("IOException writing to ByteArrayOutputStream");
}
return bos.toByteArray();
}
private void buildMultipartEntity() {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
entityBuilder.addPart("Content-Type: image/jpeg " + crlf + crlf, new ByteArrayBody(bos.toByteArray(), "car"));
}
}
=============================================== ==
以下是我提出的有关此内容以及嵌入内容主体的多部分文件可能存在的其他问题
package com.cars.android.common.volley;
import com.android.volley.AuthFailureError;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.StringRequest;
import org.apache.http.HttpEntity;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
public class ImageMultiRequest extends StringRequest {
final String BOUNDARY = "myboundary";
private final MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create();
HttpEntity entity = new MultipartEntity();
private Response.Listener<String> mListener = null;
private Response.ErrorListener mEListener;
//
private final File mFilePart;
protected String apiKey;
public ImageMultiRequest(String apiKey, String url, Listener<String> rListener, ErrorListener eListener, File file) {
super(Method.POST, url, rListener, eListener);
setShouldCache(false);
this.apiKey = apiKey;
mListener = rListener;
mEListener = eListener;
mFilePart = file;
entityBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
entityBuilder.setBoundary(BOUNDARY);
ContentType contentType = ContentType.create("image/png");
entityBuilder.addBinaryBody("file", file, contentType, "car");
entity = entityBuilder.build();
}
@Override
public String getBodyContentType() {
return entity.getContentType().getValue();
}
/**
* Overrides the base class to add the Accept: application/json header
*/
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = super.getHeaders();
if (headers == null || headers.equals(Collections.emptyMap())) {
headers = new HashMap<String, String>();
}
headers.put("Content-Type", "multipart/form-data;boundary=" + BOUNDARY+ "; charset=utf-8");
headers.put("Connection", "Keep-Alive");
headers.put("Accept", "text/plain , application/json");
headers.put("Authorization", "Token " + apiKey);
return headers;
}
@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();
}
}
答案 0 :(得分：3)
这是我的工作示例代码（仅使用小尺寸文件进行测试）：
public class FileUploadActivity extends Activity {
private final Context mContext = this;
HttpEntity httpEntity;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_file_upload);
Drawable drawable = getResources().getDrawable(R.drawable.ic_action_home);
if (drawable != null) {
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
final byte[] bitmapdata = stream.toByteArray();
String url = "http://10.0.2.2/api/fileupload";
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
// Add binary body
if (bitmapdata != null) {
ContentType contentType = ContentType.create("image/png");
String fileName = "ic_action_home.png";
builder.addBinaryBody("file", bitmapdata, contentType, fileName);
httpEntity = builder.build();
MyRequest myRequest = new MyRequest(Request.Method.POST, url, new Response.Listener<NetworkResponse>() {
@Override
public void onResponse(NetworkResponse response) {
try {
String jsonString = new String(response.data,
HttpHeaderParser.parseCharset(response.headers));
Toast.makeText(mContext, jsonString, Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(mContext, error.toString(), Toast.LENGTH_SHORT).show();
}
}) {
@Override
public String getBodyContentType() {
return httpEntity.getContentType().getValue();
}
@Override
public byte[] getBody() throws AuthFailureError {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
httpEntity.writeTo(bos);
} catch (IOException e) {
VolleyLog.e("IOException writing to ByteArrayOutputStream");
}
return bos.toByteArray();
}
};
MySingleton.getInstance(this).addToRequestQueue(myRequest);
}
}
}
...
}
public class MyRequest extends Request<NetworkResponse>