活动不等待Dialog退出

Question

在下面的代码中，我尝试使用AlertDialog获取文件夹名称的String输入，但是当对话框出现时，Activity不会等待对话框退出并且folderName的值为null。我的问题是如何让它等待输入？

我的代码

     public boolean onOptionsItemSelected(MenuItem item)
     {
        switch(item.getItemId())
        {
            case 5:
            LayoutInflater li = LayoutInflater.from(this);
            View promptsView = li.inflate(R.layout.prompts,null);
            AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);

            alertDialogBuilder.setView(promptsView);

            final EditText userInput = (EditText) promptsView.findViewById(R.id.editTextDialogUserInput);

            alertDialogBuilder.setCancelable(false).setPositiveButton("OK", new DialogInterface.OnClickListener() 
            {
                public void onClick(DialogInterface dialog, int id) 
                {
                    MainActivity.this.folderName = userInput.getText().toString();
                }

            }).setNegativeButton("Cancel",new DialogInterface.OnClickListener() 
            {
                public void onClick(DialogInterface dialog, int id) 
                {
                    dialog.cancel();
                }
            });
            try
            {
                AlertDialog alertDialog = alertDialogBuilder.create();
                alertDialog.show();
                Log.d("create folder","folder name : "+folderName);
                $mkdir(curDir,folderName);
            }
            catch(Exception e)
            {
                this.displayToast("Exception : "+e);
            }
            return true;
           }
        }

Answer 1

移动此代码：

Log.d("create folder","folder name : "+folderName);
            $mkdir(curDir,folderName);

到

public void onClick(DialogInterface dialog, int id) 
            {
                // Put code here
            }

现在您的代码如下：

alertDialogBuilder.setCancelable(false).setPositiveButton("OK", new DialogInterface.OnClickListener() 
        {
            public void onClick(DialogInterface dialog, int id) 
            {
                MainActivity.this.folderName = userInput.getText().toString();
                $mkdir(curDir,folderName);
            }

        })