java - AsyncTask 中的 ProgressDialog 未关闭

Question

我有一个 AsyncTask 问题。我有一个带有三个复选框的 Activity ，如果选中，则当用户按下按钮时启动异步任务。我的异步是这样的

    private class MyTask extends AsyncTask<Void, Void, Void> {

String valore

            public MyTask(String valore) {
                this.valore = valore;
            }

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                progressDialog = new ProgressDialog(MainActivity.this);
                progressDialog.setMessage(getString(R.string.message));
                progressDialog.setIndeterminate(true);
                progressDialog.show();
            }

            @Override
            protected Void doInBackground(Void... params) {
                // TODO Auto-generated method stub
                // Exec some operations

                return null;
            }

            @Override
            protected void onPostExecute(Void result) {
                super.onPostExecute(result);
                if(risultato != null) {
                    textView.append(risultato);
                }
                if(errori != null) {
                    textView.append(errori);
                }
                progressDialog.dismiss();
            }

        }

还有按钮

button.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(checkBox.isChecked()) {
                    new MyTask("string").execute();
                }
                if(checkBox2.isChecked()) {
                    new MyTask("string2").execute();
                }
                if(checkBox3.isChecked()) {
                    new MyTask("string3").execute();
                }
            }           
        });

问题是，如果选中两个或三个复选框，则 ProgressDialog 不会消失并保留在屏幕上。为什么？当选中两个或多个复选框时，如何将其关闭？

Answer 1

 try {
                            if ((pDialog != null) && pDialog.isShowing()) {
                                pDialog.dismiss();
                            }
                        } catch (final IllegalArgumentException e) {
                            // Handle or log or ignore
                        } catch (final Exception e) {
                            // Handle or log or ignore
                        } finally {

                            pDialog = null;
                        }

Try dismissing the dialog like this It might solve your problem

这段代码有问题

 public void onClick(View v) {
                // TODO Auto-generated method stub
                if(checkBox.isChecked()) {
                    new MyTask("string").execute();
                }
                if(checkBox2.isChecked()) {
                    new MyTask("string2").execute();
                }
                if(checkBox3.isChecked()) {
                    new MyTask("string3").execute();
                }
            }        

this is besically a logical error if we dry run this code it will execute as many time as number of checked checkbox increases . Suppose you do the checkbox1 to checked it will execute the async 1 time while when you click checkbox2 it will execute checkbox1 async as well as checkbox2 async and it be so on so change the condition on the button onclicklistner