在顯示進度對話框時漏出異步任務的窗口

Question

我有一個AsyncTask我在異步任務的preExecute（）方法中顯示進度對話框，並在異步任務的postExecute（）方法中解除它。

我還檢查對話框是否爲空。還將setCancelable設置爲false，以顯示進度對話框。嘗試了所有解決方案，但仍然窗口泄漏。

異步任務：

public class RegisterUserAsyncTask extends AsyncTask<String, Void, JSONObject> { 
    String api; 
    JSONObject jsonParams; 
    String muserName; 
    String mfullName; 
    String mpassword; 
    String mmobileNo; 
    String memailId; 
    String mdeviceId; 
    File mprofileImage; 
    private ProgressDialog progressDialog = null; 

    private static String KEY_SUCCESS = "Success"; 
    private Context mContext; 

    public RegisterUserAsyncTask(Context context, String fullName, String userName, String password, String mobileNo, String emailId, String deviceId, File profileImage) { 
     this.mContext = context; 
     this.muserName = userName; 
     this.mpassword = password; 
     this.mfullName = fullName; 
     this.mmobileNo = mobileNo; 
     this.memailId = emailId; 
     this.mdeviceId = deviceId; 
     this.mprofileImage = profileImage; 

    } 
    @Override 
    protected void onPreExecute(){ 
     super.onPreExecute(); 

     if(progressDialog == null) { 
      progressDialog = new ProgressDialog(mContext); 
      progressDialog.setMessage("Creating Account..."); 
      progressDialog.setIndeterminate(true); 
      progressDialog.setCancelable(false); 
      progressDialog.show(); 
     } 
     else { 
      progressDialog.dismiss(); 
     } 
    } 

    @Override 
    protected JSONObject doInBackground(String... params) { 
     try { 

        //Url 
      api = ServiceUrl.getBaseUrl() + ServiceUrl.getregister(); 
      //Build JsonObject 
      jsonParams = new JSONObject(); 
      String userName = this.muserName; // params[0] is username 
      String fullName = this.mfullName; // params[1] is fullname 
      String password = this.mpassword; // params[2] is password 
      String mobileNo = this.mmobileNo; // params[3] is mobile 
      String emailId = this.memailId; // params[4] is emailid 
      String deviceId = this.mdeviceId; // params[5] is deviceid 

      jsonParams.put("full_name", fullName); 
      jsonParams.put("user_name", userName); 
      jsonParams.put("password", password); 
      jsonParams.put("mobile_no", mobileNo); 
      jsonParams.put("email_id", emailId); 
      jsonParams.put("device_id", deviceId); 

      try { 
       if(convertFileToString(this.mprofileImage)!=null) { 
        jsonParams.put("profile_image", convertFileToString(this.mprofileImage)); 

        System.out.println("convertFileToString(profile_image)" + convertFileToString(this.mprofileImage)); 
       } 
       else 
       { jsonParams.put("profile_image", " null");} 

      } catch (Exception e) { 

       System.out.println("convertFileToString(profile_image)"); 

      } 

      ServerRequest request = new ServerRequest(api, jsonParams); 
      return request.sendRequest(); 

     } catch (JSONException je) { 
      return Excpetion2JSON.getJSON(je); 
     } 
    } //end of doInBackground 

    @Override 
    protected void onPostExecute(JSONObject response) { 
     super.onPostExecute(response); 


     if (response.has("message")) { 
      String message = null; 
      try { 
       if (response.getString("message").equalsIgnoreCase(KEY_SUCCESS)) { 
        Toast.makeText(mContext, "success", Toast.LENGTH_LONG).show(); 
        progressDialog.dismiss(); 
        progressDialog = null; 

       } else { 
        Toast.makeText(mContext, "Could not Register ", Toast.LENGTH_LONG).show(); 
        Intent intent = new Intent(mContext, RegisterActivity.class).setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP); 
        progressDialog.dismiss(); 
        progressDialog = null; 
        mContext.startActivity(intent); 
       } 
      } catch (JSONException e) { 
       e.printStackTrace(); 

      } 

     } 
    } 
} 

在活動呼叫RegisterAsyncTask在一個按鈕中的onCreate（）的活性的方法onClicked方法。

b1.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 
       // TODO Auto-generated method stub 
       if (checkValidation()) { 

        registerUser(); 

       } else 
        Toast.makeText(RegisterActivity.this, "Form contains error", Toast.LENGTH_LONG).show(); 

      } 
     }); 
    } 



private void registerUser() { 
    String userName = edtuserName.getText().toString(); 
    String fullName = edtfullName.getText().toString(); 
    String password = edtPassword.getText().toString(); 
    String confirm = edtconfirmPassword.getText().toString(); 
    String mobileNo = edtmobile.getText().toString(); 
    String emailId = edtemail.getText().toString(); 
    String deviceId = "233"; 

    new RegisterUserAsyncTask(RegisterActivity.this, fullName, userName, password, mobileNo, emailId, deviceId,mProfileImage).execute(); 

} 

該怎麼辦？

請幫忙。謝謝..

Answer 1

由於「上下文」可能會發生此問題。 「進度」對話框具有活動的上下文，但您可以在完成異步任務之前完成活動。所以請檢查一次。