如何在Android Volley Library中使用MultiPart上传图像文件阵列
我只是Android应用程序开发的初学者。如何在Android Volley Library中使用MultiPart上传图像文件阵列
我想使用Android Volley库上传图像文件。
我已经用在一些博客的某个地方发现了这个辅助类：
public class VolleyMultiPartRequest extends Request<NetworkResponse> { private final String twoHyphens = "--";
private final String lineEnd = "\r\n";
private final String boundary = "apiclient-" + System.currentTimeMillis();
private Response.Listener<NetworkResponse> mListener;
private Response.ErrorListener mErrorListener;
private Map<String, String> mHeaders;
SharedPreferencesManager sharedPreferencesManager =null;
public VolleyMultiPartRequest(int method, String url,
Response.Listener<NetworkResponse> listener,
Response.ErrorListener errorListener, Context context) {
super(method, url, errorListener);
this.mListener = listener;
this.mErrorListener = errorListener;
this.sharedPreferencesManager = new SharedPreferencesManager(context);
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headers = new HashMap<String, String>();
headers.put("Accept", "application/json");
headers.put("Authorization", "Bearer " + sharedPreferencesManager.retreiveString(AppText.ACCESS_TOKEN));
headers.put("Content-Type", "multipart/form-data");
return headers;
}
@Override
public String getBodyContentType() {
return "multipart/form-data;boundary=" + boundary;
}
@Override
public byte[] getBody() throws AuthFailureError {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
try {
// populate text payload
Map<String, String> params = getParams();
if (params != null && params.size() > 0) {
textParse(dos, params, getParamsEncoding());
}
// populate data byte payload
Map<String, DataPart> data = getByteData();
if (data != null && data.size() > 0) {
dataParse(dos, data);
}
// close multipart form data after text and file data
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
return bos.toByteArray();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
protected Map<String, DataPart> getByteData() throws AuthFailureError {
return null;
}
@Override
protected Response<NetworkResponse> parseNetworkResponse(NetworkResponse response) {
try {
return Response.success(
response,
HttpHeaderParser.parseCacheHeaders(response));
} catch (Exception e) {
return Response.error(new ParseError(e));
}
}
@Override
protected void deliverResponse(NetworkResponse response) {
mListener.onResponse(response);
}
@Override
public void deliverError(VolleyError error) {
mErrorListener.onErrorResponse(error);
}
private void textParse(DataOutputStream dataOutputStream, Map<String, String> params, String encoding) throws IOException {
try {
for (Map.Entry<String, String> entry : params.entrySet()) {
buildTextPart(dataOutputStream, entry.getKey(), entry.getValue());
}
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException("Encoding not supported: " + encoding, uee);
}
}
private void dataParse(DataOutputStream dataOutputStream, Map<String, DataPart> data) throws IOException {
for (Map.Entry<String, DataPart> entry : data.entrySet()) {
buildDataPart(dataOutputStream, entry.getValue(), entry.getKey());
}
}
private void buildTextPart(DataOutputStream dataOutputStream, String parameterName, String parameterValue) throws IOException {
dataOutputStream.writeBytes(twoHyphens + boundary + lineEnd);
dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"" + parameterName + "\"" + lineEnd);
dataOutputStream.writeBytes(lineEnd);
dataOutputStream.writeBytes(parameterValue + lineEnd);
}
private void buildDataPart(DataOutputStream dataOutputStream, DataPart dataFile, String inputName) throws IOException {
dataOutputStream.writeBytes(twoHyphens + boundary + lineEnd);
dataOutputStream.writeBytes("Content-Disposition: form-data; name=\"" +
inputName + "\"; filename=\"" + dataFile.getFileName() + "\"" + lineEnd);
if (dataFile.getType() != null && !dataFile.getType().trim().isEmpty()) {
dataOutputStream.writeBytes("Content-Type: " + dataFile.getType() + lineEnd);
}
dataOutputStream.writeBytes(lineEnd);
ByteArrayInputStream fileInputStream = new ByteArrayInputStream(dataFile.getContent());
int bytesAvailable = fileInputStream.available();
int maxBufferSize = 1024 * 1024;
int bufferSize = Math.min(bytesAvailable, maxBufferSize);
byte[] buffer = new byte[bufferSize];
int bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dataOutputStream.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
dataOutputStream.writeBytes(lineEnd);
}
public class DataPart {
private String fileName;
private byte[] content;
private String type;
public DataPart() {
}
public DataPart(String name, byte[] data) {
fileName = name;
content = data;
}
String getFileName() {
return fileName;
}
byte[] getContent() {
return content;
}
String getType() {
return type;
}
}
}
而且叫这个助手是这样的：
VolleyMultiPartRequest volleyMultipartRequest = new VolleyMultiPartRequest(Request.Method.POST, Api.UPLOAD_FILE, new Response.Listener<NetworkResponse>() {
@Override
public void onResponse(NetworkResponse response) {
try {
JSONObject obj = new JSONObject(new String(response.data));
Toast.makeText(context, obj.getString("message"), Toast.LENGTH_SHORT).show();
successCallBack.onSuccess(obj);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(context, error.getMessage(), Toast.LENGTH_SHORT).show();
try {
errorCallBack.onError(new JSONObject(""));
} catch (JSONException e) {
e.printStackTrace();
}
}
}, context) {
/*
* 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("file_for", "post");
params.put("file_type", "image");
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();
params.put("images[]", new DataPart(imagename + ".png", getFileDataFromDrawable(bitmap)));
return params;
}
};
我收到服务器错误作为响应。
我尝试了不同的教程，但没有找到确切的方法和简单的解决方案。
在邮递员中，邮件头和参数是这样的，有一个图片数组，你可以在附图中看到（8张照片）。我想用volley库做完全相同的API调用。
回答：
试试这个代码：
我有类似的问题的种类我固定使用这个
上传multiple files in array使用多
添加依赖条件
compile 'org.apache.httpcomponents:httpcore:4.2.4'compile 'org.apache.httpcomponents:httpmime:4.2'
compile 'com.mcxiaoke.volley:library:1.0.19'
2.增加的gradle中
defaultConfig { useLibrary 'org.apache.http.legacy'
}
Helper类AndroidMultiPartEntity.java
public class AndroidMultiPartEntity extends MultipartEntity {
private final ProgressListener listener;
public AndroidMultiPartEntity(final ProgressListener listener) {
super();
this.listener = listener;
}
public AndroidMultiPartEntity(final HttpMultipartMode mode, final ProgressListener listener) {
super(mode);
this.listener = listener;
}
public AndroidMultiPartEntity(HttpMultipartMode mode, final String boundary,
final Charset charset, final ProgressListener listener) {
super(mode, boundary, charset);
this.listener = listener;
}
@Override
public void writeTo(final OutputStream outstream) throws IOException {
super.writeTo(new CountingOutputStream(outstream, this.listener));
}
public interface ProgressListener {
void transferred(long num);
}
public static class CountingOutputStream extends FilterOutputStream {
private final ProgressListener listener;
private long transferred;
public CountingOutputStream(final OutputStream out,
final ProgressListener listener) {
super(out);
this.listener = listener;
this.transferred = 0;
}
public void write(byte[] b, int off, int len) throws IOException {
out.write(b, off, len);
this.transferred += len;
this.listener.transferred(this.transferred);
}
public void write(int b) throws IOException {
out.write(b);
this.transferred++;
this.listener.transferred(this.transferred);
}
}
}
API调用方法
private class registerCall extends AsyncTask<Void, Integer, String> { @Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected void onProgressUpdate(Integer... progress) {
}
@Override
protected String doInBackground(Void... params) {
return registerMultipartCall();
}
private String registerMultipartCall() {
String responseString = null;
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("URL"); //UPLOAD URL
try {
AndroidMultiPartEntity entity = new AndroidMultiPartEntity(new AndroidMultiPartEntity.ProgressListener() {
@Override
public void transferred(long num) {
}
});
File sourceFile = new File(filePath);
File sourceFile2 = new File(filePath);
entity.addPart("images[0]", new FileBody(sourceFile));
entity.addPart("images[1]", new FileBody(sourceFile2));
//Do your stuff multiple files
entity.addPart("file_type", new StringBody("image");
entity.addPart("file_form", new StringBody("post");
httppost.addHeader("Accept","application/json");
httppost.addHeader("Content-Type", "multipart/form-data");
httppost.addHeader("Authorization", "Bearer " + sharedPreferencesManager.retreiveString(AppText.ACCESS_TOKEN));
httppost.setEntity(entity);
// Making server call
HttpResponse response = httpclient.execute(httppost);
HttpEntity r_entity = response.getEntity();
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200) {
// Server response
statusCode = 200;
responseString = EntityUtils.toString(r_entity);
} else {
statusCode = 200;
responseString = "Error occurred! Http Status Code: " + statusCode;
}
} catch (ClientProtocolException e) {
responseString = e.toString();
} catch (IOException e) {
responseString = e.toString();
}
return responseString;
}
@Override
protected void onPostExecute(String result) {
hideProgressDialog();
}
}
5.Calling异步
new registerCall().execute(); 以上是 如何在Android Volley Library中使用MultiPart上传图像文件阵列 的全部内容， 来源链接： utcz.com/qa/265786.html
