我是Android开发的新手，我正在开发一个App就像二手踏板一样，我有一个活动是用户可以上传那些项目到服务器（文本和图片），但问题是上传文字很简单，我用Volley将文本上传到服务器，但是我很费力地将多个图像上传到服务器。 我看到Retrofit 2非常适合多文件上传，但我有很多问题。
这是ApiService
public interface ApiService {
@Multipart
@POST("xxxxxxxxxx.php")
Call<ServerResponse> uploadFile(
@Part("uploadedfile")RequestBody uploadedfile,
@Part("itemID")RequestBody itemId,
@Part MultipartBody.Part file
);
public static final Retrofit retrofit = new Retrofit.Builder()
.baseUrl("http://xxxxxxxxxxxx/")
.addConverterFactory(GsonConverterFactory.create())
.build();
}
这是serverResponse 公共类ServerResponse {
@SerializedName("message")
String message;
@SerializedName("error")
boolean error;
public String getMessage(){
return message;
}
public boolean isError(){
return error;
}
}
这是活动
public class upload extends AppCompatActivity {
public static final String UPLOAD_URL = "http://xxxxxxxxxxxxxxxxxxxxx.php";
public static final String KEY_Title = "title";
public static final String KEY_DESCRIPTION = "description";
public static final String KEY_ISBN = "ISBN";
public static final String KEY_PRICE = "price";
public static final String KEY_CONTECTNUMBER = "contectNumber";
private static final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/png");
ProgressDialog progressDialog;
String data;
private EditText et_itemTitle;
private EditText et_ISBN;
private EditText et_itemPrice;
private EditText et_itemDescription;
private EditText et_phone;
private Button b_chooseImage;
private Button bPost;
String id = "4";
private LinearLayout lnrImages;
private ArrayList<String> imagesPathList;
private Bitmap yourbitmap;
private Bitmap resized;
private final int PICK_IMAGE_MULTIPLE = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_upload);
et_itemTitle = (EditText) findViewById(R.id.et_itemTitle);
et_ISBN = (EditText) findViewById(R.id.et_ISBN);
et_itemPrice = (EditText) findViewById(R.id.et_itemPrice);
et_itemDescription = (EditText) findViewById(R.id.et_itemDescription);
et_phone = (EditText) findViewById(R.id.et_phone);
b_chooseImage = (Button) findViewById(R.id.b_chooseImage);
bPost = (Button) findViewById(R.id.bPost);
lnrImages = (LinearLayout) findViewById(R.id.lnrImages);
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Uploading...");
bPost.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String itemTitle = imagesPathList.get(0).toString();
final String ISBN = et_ISBN.getText().toString();
final String itemPrice = et_itemPrice.getText().toString();
final String itemDescription = et_itemDescription.getText().toString();
final String contectNumber = et_phone.getText().toString();
final String user = ((globalV) getApplication()).getUserID();
final String session = ((globalV) getApplication()).getSessionID();
StringRequest stringRequest = new StringRequest(Request.Method.POST, UPLOAD_URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonResponse = new JSONObject(response);
boolean error = jsonResponse.getBoolean("error");
if (error) {
String errorMessage = jsonResponse.getString("message");
AlertDialog.Builder builder = new AlertDialog.Builder(upload.this);
builder.setMessage(errorMessage)
.setNegativeButton("Retry", null)
.create()
.show();
} else {
String successMessage = jsonResponse.getString("message");
System.out.println(successMessage+"---------------");
String itemID = jsonResponse.getString("itemID");
((globalV) getApplication()).setItemID(itemID);
File file = new File(imagesPathList.get(0));
System.out.print(imagesPathList.get(0)+"====-=-=-=-=-=---=-=");
Gson gson = new GsonBuilder()
.setLenient()
.create();
RequestBody requestBody = RequestBody.create(MediaType.parse("image/png"), file);
RequestBody uploadedfile = RequestBody.create(MediaType.parse("text/plain"), file.getName());
RequestBody itemId = RequestBody.create(MediaType.parse("text/plain"), file.getName());
MultipartBody.Part fileToUpload = MultipartBody.Part.createFormData("uploadedfile", file.getName(), requestBody);
System.out.print(file+"xxxxxxxxxx");
ApiService apiService =ApiService.retrofit.create(ApiService.class);
Call<ServerResponse> call = apiService.uploadFile(uploadedfile, itemId, fileToUpload);
call.enqueue(new Callback<ServerResponse>() {
@Override
public void onResponse(Call<ServerResponse> call, retrofit2.Response<ServerResponse> response) {
ServerResponse serverResponse = response.body();
if (serverResponse != null) {
if (serverResponse.isError()) {
Toast.makeText(getApplicationContext(), serverResponse.getMessage(), Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(getApplicationContext(), serverResponse.getMessage(), Toast.LENGTH_SHORT).show();
}
}else {
assert serverResponse != null;
Log.v("Response", serverResponse.toString());
}
progressDialog.dismiss();
}
@Override
public void onFailure(Call<ServerResponse> call, Throwable t) {
Log.v("OnFailure", t.toString());
}
}); //stop
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(upload.this, error.toString(), Toast.LENGTH_SHORT).show();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> map = new HashMap<String, String>();
map.put(KEY_Title, itemTitle);
map.put(KEY_ISBN, ISBN);
map.put(KEY_PRICE, itemPrice);
map.put(KEY_DESCRIPTION, itemDescription);
map.put(KEY_CONTECTNUMBER, contectNumber);
map.put("userID", user);
map.put("sessionID", session);
map.put("id", id);
return map;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(upload.this);
requestQueue.add(stringRequest);
}
});
b_chooseImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(upload.this, CustomPhotoGalleryActivity.class);
startActivityForResult(intent, PICK_IMAGE_MULTIPLE);
if (imagesPathList != null) {
Toast.makeText(upload.this, " no images are selected", Toast.LENGTH_SHORT).show();
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == PICK_IMAGE_MULTIPLE) {
imagesPathList = new ArrayList<String>();
String[] imagesPath = data.getStringExtra("data").split("\\|");
try {
lnrImages.removeAllViews();
} catch (Throwable e) {
e.printStackTrace();
}
for (int i = 0; i < imagesPath.length; i++) {
imagesPathList.add(imagesPath[i]);
yourbitmap = BitmapFactory.decodeFile(imagesPath[i]);
ImageView imageView = new ImageView(this);
imageView.setImageBitmap(yourbitmap);
imageView.setAdjustViewBounds(true);
lnrImages.addView(imageView);
}
}
}
}
}
我还有其他选择图像的活动
public class CustomPhotoGalleryActivity extends Activity {
private GridView grdImages;
private Button btnSelect;
private ImageAdapter imageAdapter;
private String[] arrPath;
private boolean[] thumbnailsselection;
private int ids[];
private int count;
int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.custom_gallery);
grdImages = (GridView) findViewById(R.id.grdImages);
btnSelect = (Button) findViewById(R.id.btnSelect);
if (ContextCompat.checkSelfPermission(this,Manifest.permission.READ_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED){
if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.READ_EXTERNAL_STORAGE)){
}else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);
}
}
final String[] columns = {MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID};
final String orderBy = MediaStore.Images.Media._ID;
@SuppressWarnings("deprecation")
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.arrPath = new String[this.count];
ids = new int[count];
this.thumbnailsselection = new boolean[this.count];
for (int i = 0; i < this.count; i++) {
imagecursor.moveToPosition(i);
ids[i] = imagecursor.getInt(image_column_index);
int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
arrPath[i] = imagecursor.getString(dataColumnIndex);
}
imageAdapter = new ImageAdapter();
grdImages.setAdapter(imageAdapter);
imagecursor.close();
btnSelect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final int len = thumbnailsselection.length;
int cnt = 0;
String selectImages = "";
for (int i = 0; i < len; i++) {
if (thumbnailsselection[i]) {
cnt++;
selectImages = selectImages + arrPath[i] + "|";
}
}
if (cnt == 0) {
Toast.makeText(getApplicationContext(), "Please select at least one image", Toast.LENGTH_LONG).show();
} else {
Log.d("SelectedImages", selectImages);
Intent i = new Intent();
i.putExtra("data", selectImages);
setResult(Activity.RESULT_OK, i);
System.out.print("===="+selectImages);
finish();
}
}
});
}
@Override
public void onBackPressed() {
setResult(Activity.RESULT_CANCELED);
super.onBackPressed();
}
private void setBitmap(final ImageView iv, final int id) {
new AsyncTask<Void, Void, Bitmap>() {
@Override
protected Bitmap doInBackground(Void... params) {
return MediaStore.Images.Thumbnails.getThumbnail(getApplicationContext().getContentResolver(), id, MediaStore.Images.Thumbnails.MICRO_KIND, null);
}
@Override
protected void onPostExecute(Bitmap result) {
super.onPostExecute(result);
iv.setImageBitmap(result);
}
}.execute();
}
public class ImageAdapter extends BaseAdapter{
private LayoutInflater mInflater;
public ImageAdapter(){
mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return count;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.custom_gallery_item, null);
holder.imgThumb = (ImageView) convertView.findViewById(R.id.imgThumb);
holder.chkImage = (CheckBox) convertView.findViewById(R.id.chkImage);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.chkImage.setId(position);
holder.imgThumb.setId(position);
holder.chkImage.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
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.imgThumb.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
int id = holder.chkImage.getId();
if (thumbnailsselection[id]) {
holder.chkImage.setChecked(false);
thumbnailsselection[id] = false;
} else {
holder.chkImage.setChecked(true);
thumbnailsselection[id] = true;
}
}
});
try {
setBitmap(holder.imgThumb, ids[position]);
} catch (Throwable e) {
}
holder.chkImage.setChecked(thumbnailsselection[position]);
holder.id = position;
return convertView;
}
}
class ViewHolder {
ImageView imgThumb;
CheckBox chkImage;
int id;
}
}
可能我需要同时请求服务器，请有人帮助我.............
答案 0 :(得分：1)
如果您想使用单个键上传多个图像。将MultipartBody.Part设为数组。
Call<ServerResponse> uploadFile(
@Part("uploadedfile")RequestBody uploadedfile,
@Part("itemID")RequestBody itemId,
@Part MultipartBody.Part[] file
);
MultipartBody.Part[] imageParts = new MultipartBody.Part[10];
for (int index = 0; index < 10; index++) {
File file = new File(IMAGE_FILE[index]);
RequestBody surveyBody = RequestBody.create(MediaType.parse("image/*"), file);
imageParts[index] = MultipartBody.Part.createFormData("SurveyImage", file.getName(), uploadedfile);
}