[英]Android volley upload image
我正在制作一個應用程序,必須使用Volley
上傳圖像。 我試圖用Google搜尋,但沒有找到類似的東西。 使用Volley
發布此圖像時,如何進行圖像的多部分上傳並添加諸如user_id
參數?
在我的情況下,不建議使用Retrofit
。
首先創建文件MultipartRequest
,如下所示:
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);
}}
在您的活動中,只需按以下步驟進行“多部分請求”:
public void uploadImage()
{
try {
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Loading...");
pDialog.show();
HashMap params = new HashMap<String, String>();
params.put(KEY_NAME, name);
MultipartRequest sr = new MultipartRequest( UPLOAD_URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
if ((pDialog != null) && pDialog.isShowing()) {
pDialog.dismiss();
}
Log.d("file", f + "");
Log.d("", ".......response====" + response.toString());
////////
try {
JSONObject object = new JSONObject(response);
String serverCode = object.getString("code");
if (serverCode.equalsIgnoreCase("0")) {
}
if (serverCode.equalsIgnoreCase("1")) {
try {
if ("1".equals(serverCode)) {
JSONObject object1 = object.getJSONObject("data");
}
}
使用改造2:
您需要使用OkHttp的RequestBody類並將文件封裝到請求正文中(意味着您的用戶ID)。
1)創建界面
public interface FileUploadService {
@Multipart
@POST("/upload")
Call<String> upload(
@Part("myfile\"; filename=\"image.png\" ") RequestBody file,
@Part("userid") RequestBody userid);
}
2)活動代碼:
FileUploadService service =
ServiceGenerator.createService(FileUploadService.class);
String userid = "your_userid";
RequestBody data =
RequestBody.create(MediaType.parse("multipart/form-data"), userid);
File file = new File("path/to/your/file");
RequestBody requestBody =
RequestBody.create(MediaType.parse("multipart/form-data"), file);
Call<String> call = service.upload(requestBody, data);
call.enqueue(new Callback<String>() {
@Override
public void onResponse(Call<String> call, Response<String> response) {
Log.v("Upload", "success");
}
@Override
public void onFailure(Call<String> call, Throwable t) {
Log.e("Upload", t.getMessage());
}
});
請參閱鏈接: https : //futurestud.io/blog/retrofit-2-how-to-upload-files-to-server
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