Httpentity Is Deprecated on Android Now, What's the Alternative

DELETE Request with Body (Without using Deprecated HttpEntity)

Check the related topic in the official changelog of the 6.0. So you should use the HttpURLConnection class.

An example:

URL url = new URL("your_url");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
try {
    urlConnection.setRequestMethod("DELETE");
    urlConnection.setDoOutput(true);
    // Maybe you should set the request properties here too, but it depends on your body.

    OutputStreamWriter osw = new OutputStreamWriter(urlConnection.getOutputStream());
    osw.write("this_is_the_body");
    osw.flush();

    int HttpResult = urlConnection.getResponseCode(); 
    if(HttpResult == HttpURLConnection.HTTP_OK) {
        InputStream is = new BufferedInputStream(urlConnection.getInputStream());
        // Handle the response.
    } else {
        // ...
    }
}
finally {
    urlConnection.disconnect();
}

Cannot Resolve Symbol HttpEntity,HttpResponse

HTTP client is deprecated on sdk 23, use HttpURLConnection instead

or add this to your gradle (not recommended)

android {
    useLibrary 'org.apache.http.legacy'
}

EDIT

public String getXmlFromUrl(String urlString) {
    String xml = null;

    URL url;
    HttpURLConnection urlConnection = null;

    try {
        url = new URL(urlString);

        urlConnection = (HttpURLConnection) url.openConnection();

        InputStream in = urlConnection.getInputStream();

        InputStreamReader isw = new InputStreamReader(in);

        BufferedReader br = new BufferedReader(isw);
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line+"\n");
        }
        br.close();

        xml = sb.toString();
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    // return XML
    return xml;
}

http://developer.android.com/about/versions/marshmallow/android-6.0-changes.html#behavior-apache-http-client

The type MultipartEntity is deprecated

If you read the docs carefully, you'll notice that you should use MultipartEntityBuilder as an alternative.

For example:

MultipartEntityBuilder builder = MultipartEntityBuilder.create();        

/* example for setting a HttpMultipartMode */
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

/* example for adding an image part */
FileBody fileBody = new FileBody(new File(image)); //image should be a String
builder.addPart("my_file", fileBody); 
//and so on

Note that there are several constructors for the FileBody class, by which you can provide mimeType, content type, etc.

After you're done with passing build instructions to the builder, you can get the built HttpEntity by invoking the MultipartEntityBuilder#build() method:

HttpEntity entity = builder.build();

How to send multipart request using Volley without HttpEntity?

I have found a solution for this (based on
Multipart/form-data requests in Android: HttpURLConnection vs OkHttp )

Here is my working sample code (tested with ASP.Net WebAPI)

MultipartActivity.java

package com.example.volleyapp;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.view.Menu;
import android.view.MenuItem;

import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.example.volleyapp.BaseVolleyRequest;
import com.example.volleyapp.VolleySingleton;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;

public class MultipartActivity extends Activity {

    final Context mContext = this;
    String mimeType;
    DataOutputStream dos = null;
    String lineEnd = "\r\n";
    String boundary = "apiclient-" + System.currentTimeMillis();
    String twoHyphens = "--";
    int bytesRead, bytesAvailable, bufferSize;
    byte[] buffer;
    int maxBufferSize = 1024 * 1024;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_multipart);             

        Drawable drawable = ContextCompat.getDrawable(mContext, R.drawable.ic_action_file_attachment_light);
        Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
        final byte[] bitmapData = byteArrayOutputStream.toByteArray();
        String url = "http://192.168.1.100/api/postfile";

        mimeType = "multipart/form-data;boundary=" + boundary;

        BaseVolleyRequest baseVolleyRequest = new BaseVolleyRequest(1, url, new Response.Listener<NetworkResponse>() {
            @Override
            public void onResponse(NetworkResponse response) {

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {

            }
        }) {
            @Override
            public String getBodyContentType() {
                return mimeType;
            }

            @Override
            public byte[] getBody() throws AuthFailureError {
                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                dos = new DataOutputStream(bos);
                try {
                    dos.writeBytes(twoHyphens + boundary + lineEnd);
                    dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
                            + "ic_action_file_attachment_light.png" + "\"" + lineEnd);
                    dos.writeBytes(lineEnd);
                    ByteArrayInputStream fileInputStream = new ByteArrayInputStream(bitmapData);
                    bytesAvailable = fileInputStream.available();

                    bufferSize = Math.min(bytesAvailable, maxBufferSize);
                    buffer = new byte[bufferSize];

                    // read file and write it into form...
                    bytesRead = fileInputStream.read(buffer, 0, bufferSize);

                    while (bytesRead > 0) {
                        dos.write(buffer, 0, bufferSize);
                        bytesAvailable = fileInputStream.available();
                        bufferSize = Math.min(bytesAvailable, maxBufferSize);
                        bytesRead = fileInputStream.read(buffer, 0, bufferSize);
                    }

                    // send multipart form data necesssary after file data...
                    dos.writeBytes(lineEnd);
                    dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

                    return bos.toByteArray();

                } catch (IOException e) {
                    e.printStackTrace();
                }
                return bitmapData;
            }
        };

        VolleySingleton.getInstance(mContext).addToRequestQueue(baseVolleyRequest);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_multipart, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

BaseVolleyRequest.java:

package com.example.volleyapp;

import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.HttpHeaderParser;
import com.google.gson.JsonSyntaxException;

public class BaseVolleyRequest extends Request<NetworkResponse> {

    private final Response.Listener<NetworkResponse> mListener;
    private final Response.ErrorListener mErrorListener;

    public BaseVolleyRequest(String url, Response.Listener<NetworkResponse> listener, Response.ErrorListener errorListener) {
        super(0, url, errorListener);
        this.mListener = listener;
        this.mErrorListener = errorListener;
    }

    public BaseVolleyRequest(int method, String url, Response.Listener<NetworkResponse> listener, Response.ErrorListener errorListener) {
        super(method, url, errorListener);
        this.mListener = listener;
        this.mErrorListener = errorListener;
    }

    @Override
    protected Response<NetworkResponse> parseNetworkResponse(NetworkResponse response) {
        try {
            return Response.success(
                    response,
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (JsonSyntaxException e) {
            return Response.error(new ParseError(e));
        } catch (Exception e) {
            return Response.error(new ParseError(e));
        }
    }

    @Override
    protected void deliverResponse(NetworkResponse response) {
        mListener.onResponse(response);
    }

    @Override
    protected VolleyError parseNetworkError(VolleyError volleyError) {
        return super.parseNetworkError(volleyError);
    }

    @Override
    public void deliverError(VolleyError error) {
        mErrorListener.onErrorResponse(error);
    }
}

why is AsyncTask doing deprecated lines ? in my code?

HttpGet, HttpClient ,HttpResponse and HttpEntity are depreceated.

Now you have to use HttpUrlConnection

URL url = new URL("http://www.android.com/");
   HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
   try {
     InputStream in = new BufferedInputStream(urlConnection.getInputStream());
     readStream(in);
    finally {
     urlConnection.disconnect();
   }
 }

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