Get Dialog user input before remaining code executes

Question

I am trying to get a user input from a dialog prompt to determine wether a variable is true or false. I need to to do this before any other code in the List Activity class is executed.

Problem is no matter where I call the method that displays prompt, the rest of the code in the class continues to execute before the dialog returns a user choice!

Where is best place to place a dialog prompt, and stop code form executing until we get a response from the user via the dialog?

Thanks Ciaran

PS this is the code I call in the ListActovty onCreate method:

private void previewDives() {
        //ask user if they wish to preview images in ist view as will take more time
                AlertDialog.Builder build = null;
                AlertDialog dialog = null;
                build = new AlertDialog.Builder(this);
                build.setCancelable(true);
                build.setMessage("Do you want to preview your Dive Site images? \nThis may take more time if you have a large number of dives");
                build.setPositiveButton("Yes",
                        new DialogInterface.OnClickListener() {

                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                // preview dives
                                preiwImagesInListView= true;
                                value++;
                                //return;//exit

                            }// end on click
                        });// end pos button take photo

                // get photo from SD card option
                build.setNegativeButton("No",
                        new DialogInterface.OnClickListener() {

                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                preiwImagesInListView=false;
                                value++;
                                //return;//exit to oncreate

                            }// end onclick
                        });// end pos button take photo
                dialog = build.create();
                dialog.setTitle("Preview Dive Images");
                dialog.show();

                //return preiwImagesInListView;


    }

score 1 · Accepted Answer · edited May 23 '17 at 12:03

The dialog is executed in a different thread. So whatever you do after the show() call will be executed anyways. To solve this issue make a function to handle the response of the function and call that function inside the Yes and No answer function with a argument. A better solution is to use a MessageHandler to make it thread safe if you are using multiple threads.

You can not let the thread wait. More info can be found on this thread Dialogs / AlertDialogs: How to "block execution" while dialog is up (.NET-style)

score 1 · Answer 2 · answered Feb 23 '14 at 15:55

1

You can put your code into Dialog Yes button onClick() event. It's because after getting a data to confirm the user you want to processed more or not. but before executing your code into yes button onclick() you must check user input is valid or not.

answered Feb 23 '14 at 15:55

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Get Dialog user input before remaining code executes

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