無法上傳圖片和一個數據到服務器

Question

這是我用來上傳一張照片和一個數據的代碼。應用連續顯示發送對話，它不停止。

private void uploadImage() { 
     String uploadUrl = "http://************.php"; 

     HashMap<String, String> params = new HashMap<>(); 
     params.put("photo_one",imageString(bitmap)); 
     params.put("mobile",mName.getText().toString().trim()); 

     final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this); 
     progressDialog.setMessage("Sending Data...."); 
     progressDialog.show(); 

     JsonObjectRequest req = new JsonObjectRequest(uploadUrl, new JSONObject(params), 
       new Response.Listener<JSONObject>() { 
        @Override 
        public void onResponse(JSONObject response) { 
         progressDialog.dismiss(); 

         String success = (String) response.opt("success"); 
         if (!success.equals("1")) 
         { 
       Toast.makeText(getApplicationContext(),"Invalid Username & Password...",Toast.LENGTH_LONG).show(); 
         } 
        } 
       }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       progressDialog.dismiss(); 
      } 
     }); 
     int x=2;// retry count 
     req.setRetryPolicy(new DefaultRetryPolicy(DefaultRetryPolicy.DEFAULT_TIMEOUT_MS * 48, x, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)); 

我用調試模式來檢查發生了什麼，得到了這個答覆。

> req = {JsonObjectRequest@4643} "[ ] 
> http://*********.php 0xb5b5014d NORMAL null" 
> this = {MainActivity@4174} uploadUrl = "http://***********.php" 
> params = {HashMap@4549} size = 2 
> progressDialog = {ProgressDialog@4595} req = {JsonObjectRequest@4643} "[] 
> http://***********.php 0xb5b5014d NORMAL null" x = 2 

Answer 1

請使用日誌來檢查Json響應。

而且連續顯示進度對話框，更改以下

final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this); 
     progressDialog.setMessage("Sending Data...."); 
     progressDialog.show(); 

到

final ProgressDialog loading = ProgressDialog.show(this,"Sending Data","Please wait...",false,false);