android - How do I show only one Dialog at a time?

Question

My Android application shows an AlertDialog on a button click. When I click on the button more than once more than one Dialog is created. How can I fix this?

Here is my code:

button.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        dialog =  new AlertDialog.Builder(context);             
        dialog.show();
    }
});

Answer 1

you need to check if dialog isShowing or not

Dialog has an isShowing() method that should return if the dialog is currently visible.

public AlertDialog myDialog;

public void showDialog(Context context) {
    if( myDialog != null && myDialog.isShowing() ) return;

    AlertDialog.Builder builder = new AlertDialog.Builder(context);
    builder.setTitle("Title");
    builder.setMessage("Message");
    builder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int arg1) {
                dialog.dismiss();
            }});
    builder.setCancelable(false);
    myDialog = builder.create();
    myDialog.show();
  }