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我想将用户采用的图像上传到使用Android Volley的服务器。我已经阅读了这些问题的其他答案，但他们建议使用多部分请求，但我想使用Volley。无法使用Android Volley将图像上传到服务器
我正在尝试上传用户为配置文件图片选择的图像。我提供用户ID来识别用户和形象的字符串形式，图像将被存储在特定的目录取决于用户ID。如果操作成功，服务器将为true，否则为false。
这里是功能上传图像
private void uploadImage() {
//Showing the progress dialog
final ProgressDialog loading = ProgressDialog.show(this, "Uploading...", "Please wait...", false, false);
String UPLOAD_URL = "http://parque.890m.com/upload-user-img.php";
StringRequest stringRequest = new StringRequest(Request.Method.POST, UPLOAD_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String s) {
//Dismissing the progress dialog
Log.d("response", s);
loading.dismiss();
//Showing toast message of the response
if (s.equals("true")) {
Log.d("upload_success", "successful upload : " + s);
} else if (s.equals("false")) {
Log.d("upload_failure", "successful upload : " + s);
} else {
Log.d("connection_failure", "connection failed");
}
Toast.makeText(UserProfile.this, s, Toast.LENGTH_LONG).show();
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError volleyError) {
//Dismissing the progress dialog
loading.dismiss();
//Showing toast
Log.d("upload_error", "" + volleyError.getMessage());
Toast.makeText(UserProfile.this, volleyError.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
//Converting Bitmap to String
String image = getStringImage(bitmap);
Log.d("image_string", "" + image);
//Getting Image Name
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(UserProfile.this);
String name = preferences.getString("id", null);
//Creating parameters
Map<String, String> params = new Hashtable<String, String>();
//Adding parameters
params.put(KEY_IMAGE, image);
params.put(KEY_NAME, name);
//returning parameters
Log.d("params : ", "" + params.toString());
return params;
}
};
//Creating a Request Queue
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
//Adding request to the queue
stringRequest.setRetryPolicy(new DefaultRetryPolicy(DefaultRetryPolicy.DEFAULT_TIMEOUT_MS * 2, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
requestQueue.add(stringRequest);
}*/
我写了一个函数图像转换为字符串
public String getStringImage(Bitmap bmp) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] imageBytes = baos.toByteArray();
return encodeToString(imageBytes, DEFAULT);
}
和服务器端代码
<?php
require_once 'inc/connection.inc.php';
if(isset($_POST['user'])){
$success = false;
$image = $_POST['image'];
$name = $_POST['user'];
$path = "uploads/$name";
$actualpath = "http://parque.890m.com/$path";
$query = "UPDATE `users` SET `photo_url` = $actualpath WHERE `user_id`= $name";
if(mysqli_query($connection,$query)){
file_put_contents($path,base64_decode($image));
$success = true;
}
echo json_encode($success);
mysqli_close($connection);
}
服务器在上传图像时返回false，并且图像未上传。
首先创建一个文件名为：MultipartRequest如下：
public class MultipartRequest extends Request<String> {
private MultipartEntityBuilder entity = MultipartEntityBuilder.create();
private final Response.Listener<String> mListener;
private final File file;
private final HashMap<String, String> params;
public MultipartRequest(String url, Response.Listener<String> listener, Response.ErrorListener errorListener, File file, HashMap<String, String> params)
{
super(Method.POST, url, errorListener);
mListener = listener;
this.file = file;
this.params = params;
buildMultipartEntity();
buildMultipartEntity2();
}
private void buildMultipartEntity()
{
entity.addBinaryBody(KEY_IMAGE, file, ContentType.create("image/jpeg"), file.getName());
entity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
entity.setLaxMode().setBoundary("xx").setCharset(Charset.forName("UTF-8"));
try
{
for (String key : params.keySet()) {
entity.addPart(key, new StringBody(params.get(key)));
}
}
catch (UnsupportedEncodingException e)
{
VolleyLog.e("UnsupportedEncodingException");
}
}
@Override
public String getBodyContentType()
{
return entity.build().getContentType().getValue();
}
@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("Accept", "application/json");
return headers;
}
@Override
public byte[] getBody() throws AuthFailureError
{
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try
{
entity.build().writeTo(bos);
}
catch (IOException e)
{
VolleyLog.e("IOException writing to ByteArrayOutputStream");
}
return bos.toByteArray();
}
/**
* copied from Android StringRequest class
*/
@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
String parsed;
try {
parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
} catch (UnsupportedEncodingException e) {
parsed = new String(response.data);
}
return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
}
@Override
protected void deliverResponse(String response) {
mListener.onResponse(response);
}}
此外，我们正在使用多要求，我们需要上传
一次尝试我的图书馆https://github.com/amitshekhariitbhu/Fast-Android-Networking#uploading-a-file-to-server –