如何使用multipart实体将图像上传到服务器？
我正在创建一个应用程序，在我的应用程序中，我添加了一个选项来浏览库中的图像，然后上传到服务器，我之前问过这个问题，但没有得到好的答案，而且为了上传图像，我正在按照本教程{{ 3}}及以下我发布我的代码可以任何人帮助我..
public class PhotoUpload extends Activity{
private Button upload, pick;
private ProgressDialog dialog;
MultipartEntity entity;
GridView gv;
int count = 0;
String matchId;
ArrayList<String> ImgData;
public ArrayList<String> map = new ArrayList<String>();
Bundle b;
TextView noImage;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.photos_upload);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
b = getIntent().getExtras();
matchId=this.getIntent().getStringExtra("id");
System.out.println(matchId);
noImage = (TextView) findViewById(R.id.noImage);
upload = (Button) findViewById(R.id.btnUpload);
pick = (Button) findViewById(R.id.btnPicture);
gv = (GridView) findViewById(R.id.gridview);
gv.setAdapter(new ImageAdapter(this));
if (b != null) {
ImgData = b.getStringArrayList("IMAGE");
for (int i = 0; i < ImgData.size(); i++) {
map.add(ImgData.get(i).toString());
}
} else {
noImage.setVisibility(View.VISIBLE);
}
upload.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
new ImageUploadTask()
.execute(count + "", "pk" + count + ".jpg");
}
});
pick.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i3 = new Intent(PhotoUpload.this, UploadActivity.class);
startActivity(i3);
}
});
}
class ImageUploadTask extends AsyncTask<String, Void, String> {
String sResponse = null;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
dialog = ProgressDialog.show(PhotoUpload.this, "Uploading",
"Please wait...", true);
dialog.show();
}
@Override
protected String doInBackground(String... params) {
try {
String url = "http://mnbmnbnmb.com/webservice/addphoto?version=apps&user_login_id="+matchId+"&image_1="+ImgData+"&action=save";
int i = Integer.parseInt(params[0]);
Bitmap bitmap = decodeFile(map.get(i));
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost(url);
entity = new MultipartEntity();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.JPEG, 100, bos);
byte[] data = bos.toByteArray();
entity.addPart("user_login_id", new StringBody("199"));
entity.addPart("image_1", new StringBody("10"));
entity.addPart("action", new ByteArrayBody(data,
"image/jpeg", params[1]));
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost,
localContext);
sResponse = EntityUtils.getContentCharSet(response.getEntity());
System.out.println("sResponse : " + sResponse);
} catch (Exception e) {
if (dialog.isShowing())
dialog.dismiss();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
return sResponse;
}
@Override
protected void onPostExecute(String sResponse) {
try {
if (dialog.isShowing())
dialog.dismiss();
if (sResponse != null) {
Toast.makeText(getApplicationContext(),
sResponse + " Photo uploaded successfully",
Toast.LENGTH_SHORT).show();
count++;
if (count < map.size()) {
new ImageUploadTask().execute(count + "", "hm" + count
+ ".jpg");
}
}
} catch (Exception e) {
Toast.makeText(getApplicationContext(), e.getMessage(),
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
}
}
}
public Bitmap decodeFile(String filePath) {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 1024;
// Find the correct scale value. It should be the power of 2.
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
Bitmap bitmap = BitmapFactory.decodeFile(filePath, o2);
return bitmap;
}
private class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return map.size();
}
public Object getItem(int position) {
return null;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some
// attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85,
Gravity.CENTER));
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setPadding(1, 1, 1, 1);
} else {
imageView = (ImageView) convertView;
}
imageView
.setImageBitmap(BitmapFactory.decodeFile(map.get(position)));
return imageView;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
PhotoUpload.this.finish();
}
}
UploadActivity.java
public class UploadActivity extends Activity{
private int count;
private Bitmap[] thumbnails;
private boolean[] thumbnailsselection;
private String[] arrPath;
private ImageAdapter imageAdapter;
private static final int PICK_FROM_CAMERA = 1;
ArrayList<String> IPath = new ArrayList<String>();
public static Uri uri;
/** Called when the activity is first created. */
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_upload);
final String[] columns = { MediaStore.Images.Media.DATA,
MediaStore.Images.Media._ID };
final String orderBy = MediaStore.Images.Media._ID;
Cursor imagecursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,
null, orderBy);
int image_column_index = imagecursor
.getColumnIndex(MediaStore.Images.Media._ID);
this.count = imagecursor.getCount();
this.thumbnails = new Bitmap[this.count];
this.arrPath = new String[this.count];
this.thumbnailsselection = new boolean[this.count];
for (int i = 0; i < this.count; i++) {
imagecursor.moveToPosition(i);
int id = imagecursor.getInt(image_column_index);
int dataColumnIndex = imagecursor
.getColumnIndex(MediaStore.Images.Media.DATA);
thumbnails[i] = MediaStore.Images.Thumbnails.getThumbnail(
getApplicationContext().getContentResolver(), id,
MediaStore.Images.Thumbnails.MICRO_KIND, null);
arrPath[i] = imagecursor.getString(dataColumnIndex);
}
GridView imagegrid = (GridView) findViewById(R.id.PhoneImageGrid);
imageAdapter = new ImageAdapter();
imagegrid.setAdapter(imageAdapter);
imagecursor.close();
final Button uploadBtn = (Button) findViewById(R.id.uploadDONE);
uploadBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
final int len = thumbnailsselection.length;
int cnt = 0;
String selectImages = "";
for (int i = 0; i < len; i++) {
if (thumbnailsselection[i]) {
cnt++;
selectImages = arrPath[i];
IPath.add(selectImages);
}
}
if (cnt == 0) {
Toast.makeText(getApplicationContext(),
"Please select at least one image",
Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(),
"You've selected Total " + cnt + " image(s).",
Toast.LENGTH_LONG).show();
Log.d("SelectedImages", selectImages);
Intent intentMessage = new Intent(UploadActivity.this,
PhotoUpload.class);
intentMessage.putStringArrayListExtra("IMAGE", IPath);
startActivity(intentMessage);
}
}
});
}
public class ImageAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public ImageAdapter() {
mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return count;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.galleryitem, null);
holder.imageview = (ImageView) convertView
.findViewById(R.id.thumbImage);
holder.checkbox = (CheckBox) convertView
.findViewById(R.id.itemCheckBox);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.checkbox.setId(position);
holder.imageview.setId(position);
holder.checkbox.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
CheckBox cb = (CheckBox) v;
int id = cb.getId();
if (thumbnailsselection[id]) {
cb.setChecked(false);
thumbnailsselection[id] = false;
} else {
cb.setChecked(true);
thumbnailsselection[id] = true;
}
}
});
holder.imageview.setImageBitmap(thumbnails[position]);
holder.checkbox.setChecked(thumbnailsselection[position]);
holder.id = position;
return convertView;
}
}
class ViewHolder {
ImageView imageview;
CheckBox checkbox;
int id;
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
Intent i = new Intent(UploadActivity.this, MainActivity.class);
UploadActivity.this.finish();
startActivity(i);
super.onBackPressed();
}
}
4 个答案:
答案 0 :(得分：1)
我正在使用此代码将文件上传到服务器:(如果我理解你的问题）
首先选择文件
在你的选择imge btn监听器中运行这个方法之一：
从图库中选择照片：
void startImagePicker() {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, REQUEST_SEND_IMAGE);
}
用相机拍照：
void startPhotoTaker() {
// create Intent to take a picture and return control to the calling application
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File photo = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), "cs_" + new Date().getTime() + ".jpg");
mLastPhoto = Uri.fromFile(photo);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
mLastPhoto);
// start the image capture Intent
startActivityForResult(intent, REQUEST_TAKE_PICTURE);
}
从文件管理器中选择任何文件：
void startFilePicker() {
Intent selectFile = new Intent(Intent.ACTION_GET_CONTENT);
selectFile.setType("file/*");
Intent intentChooser = Intent.createChooser(selectFile, "Select File");
if (intentChooser != null)
startActivityForResult(Intent.createChooser(selectFile, "Select File"), REQUEST_SEND_FILE);
}
复制了这个：
onActivityResualt中的：
if (resultCode == RESULT_OK) {
if (requestCode == REQUEST_SEND_IMAGE) {
Uri uri = resultIntent.getData();
if (uri == null) {
return;
}
File file = new File(getRealPathFromURI(uri));
final Handler handler = new Handler();
MediaScannerConnection.scanFile(
this, new String[]{file.toString()}, null,
new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, final Uri uri) {
handler.post(new Runnable() {
@Override
public void run() {
uploadFile(uri);
}
});
}
});
} else if (requestCode == REQUEST_SEND_FILE |) {
Uri uri = resultIntent.getData();
if (uri == null) {
return;
}
uploadFile(uri);
} else if (requestCode == REQUEST_TAKE_PICTURE) {
File file = new File(getRealPathFromURI(mLastPhoto));
final Handler handler = new Handler();
MediaScannerConnection.scanFile(
this, new String[]{file.toString()}, null,
new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, final Uri uri) {
handler.post(new Runnable() {
@Override
public void run() {
uploadFile(mLastPhoto);
}
});
}
});
}
}
将文件上传到服务器：
private String uploadFile(Uri resourceUri) {
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
final File sourceFile = new File(getRealPathFromURI(resourceUri));
String serverResponseMessage = null;
String responce = null;
if (!sourceFile.isFile()) {
dialog.dismiss();
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(), "File not found !", Toast.LENGTH_LONG).show();
}
});
return "no file";
} else {
try {
FileInputStream fileInputStream = new FileInputStream(sourceFile.getPath());
URL url = new URL("your upload server/API url");
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty(POST_FIELD, sourceFile.getName());
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"" + POST_FIELD + "\";filename="
+ sourceFile.getName() + lineEnd);
dos.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
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);
}
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
int serverResponseCode = conn.getResponseCode();
serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
if (serverResponseCode <= 200) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(PreviewActivity.this, "File Upload Complete.",
Toast.LENGTH_SHORT).show();
}
});
}
fileInputStream.close();
dos.flush();
dos.close();
} catch (FileNotFoundException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(PreviewActivity.this, "MalformedURLException",
Toast.LENGTH_SHORT).show();
}
});
} catch (IOException e) {
dialog.dismiss();
e.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(PreviewActivity.this, "Got Exception : see logcat ",
Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server Exception", "Exception : "
+ e.getMessage(), e);
}
}
dialog.dismiss();
return responce;
}
答案 1 :(得分：1)
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
filePath = data.getData();
try {
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
pro.setImageBitmap(bitmap);
updatepro();
} catch (IOException e) {
e.printStackTrace();
}
}
}
VolleyMultipartRequest volleyMultipartRequest = new VolleyMultipartRequest(Request.Method.POST, UPLOAD_URL,
new Response.Listener<NetworkResponse>() {
@Override
public void onResponse(NetworkResponse response) {
Log.d("Response", String.valueOf(response));
try {
JSONObject obj = new JSONObject(new String(response.data));
Toast.makeText(getApplicationContext(),"success", Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();
}
}) {
/*
* 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("aid", aid);
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();///IMAGE NAME SETTING DURING
params.put("img1", new DataPart(imagename + ".png", getFileDataFromDrawable(bitmap)));
return params;
}
};
//adding the request to volley
Volley.newRequestQueue(this).add(volleyMultipartRequest);
答案 2 :(得分：0)
您可以使用Volley（来自Google的库）来处理您的网络请求。 而且，如果您使用Volley，还可以使用附加组件来处理Multipart Request。 像VolleyEx和MultiPartRequest.java
答案 3 :(得分：0)
已经很晚了，但可能会帮助别人
这是将图像文件作为多部分发送到服务器的完整代码
private void UploadImagep（Uri ur）{
File sourceFile = new File(ur.getPath());
try {
final com.squareup.okhttp.MediaType MEDIA_TYPE_PNG = com.squareup.okhttp.MediaType.parse("image/*");
com.squareup.okhttp.RequestBody requestBody = new MultipartBuilder()
.type(MultipartBuilder.FORM)
.addFormDataPart("image", "image.png", com.squareup.okhttp.RequestBody.create(MEDIA_TYPE_PNG, sourceFile))
.build();
com.squareup.okhttp.Request request = new com.squareup.okhttp.Request.Builder()
.url("url")
.put(requestBody)
.addHeader("Authorization", "Token " + auth)
.addHeader("Content-Type", "application/x-www-formurlencoded")
.build();
OkHttpClient client = new OkHttpClient();
com.squareup.okhttp.Response response = client.newCall(request).execute();
if (response.isSuccessful() == true) {
super.recreate();
} else {
}
System.out.println("Response data " + response);
} catch (Exception e) {
System.out.println("Response error is" + e);
}
}
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