如何将相机照片从android上传到网络服务器？

Question

我正在一个项目中，我想用相机拍照并将其发送到url文件（Web服务器），有人知道该怎么做？

这是我正在使用的代码，但是在发送图像时出现错误，我之前从未使用过HTTP协议，所以我不知道如何解决它，有人知道如何做？

public class MainActivity extends AppCompatActivity {

Button btpic, btnup;
private Uri fileUri;
String picturePath;
Uri selectedImage;
Bitmap bitmap;
private ImageView Imageprev;
String ba1;
public static String URL = "URL HERE";
static final int REQUEST_IMAGE_CAPTURE = 1;

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

    Imageprev = (ImageView) findViewById(R.id.Imageprev);

    btpic = (Button) findViewById(R.id.cpic);
    btpic.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            clickpic();
        }
    });

    btnup = (Button) findViewById(R.id.up);
    btnup.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            upload();
        }
    });
}

  private void upload() {
    // Image location URL
    Log.e("path", "----------------" + picturePath);

    // Image
    Bitmap bm = BitmapFactory.decodeFile(picturePath);
    ByteArrayOutputStream bao = new ByteArrayOutputStream();
    bm.compress(Bitmap.CompressFormat.JPEG, 90, bao);
    byte[] ba = bao.toByteArray();
    //ba1 = Base64.encodeBytes(ba);

    Log.e("base64", "-----" + ba1);

    // Upload image to server
    new uploadToServer().execute();

}

private void clickpic() {

    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    } else {
        Toast.makeText(getApplication(), "Camera not supported", Toast.LENGTH_LONG).show();
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        Bundle extras = data.getExtras();
        Bitmap imageBitmap = (Bitmap) extras.get("data");
        Imageprev.setImageBitmap(imageBitmap);
    }
}

public class uploadToServer extends AsyncTask<Void, Void, String> {

    private ProgressDialog pd = new ProgressDialog(MainActivity.this);

    protected void onPreExecute() {
        super.onPreExecute();
        pd.setMessage("Wait image uploading!");
        pd.show();
    }

    @Override
    protected String doInBackground(Void... params) {

        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        nameValuePairs.add(new BasicNameValuePair("base64", ba1));
        nameValuePairs.add(new BasicNameValuePair("ImageName", System.currentTimeMillis() + ".jpg"));
        try {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(URL);
            httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
            HttpResponse response = httpclient.execute(httppost);
            String st = EntityUtils.toString(response.getEntity());
            Log.v("log_tag", "In the try Loop" + st);

        } catch (Exception e) {
            Log.v("log_tag", "Error in http connection " + e.toString());
        }
        return "Success";

    }

    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        pd.hide();
        pd.dismiss();
    }
}