Question

I have an android application that scans the sd-card and plays file that are located on the sd-card. however, i want to first check whether sd-card is in the slot or not before i can continue processing. however, the alert dialog doesn’t wait for the input and continue processing the background which gives errors because there is no sd-card and the background processing tries to access that sd-card. I want to wait until I am finished with the alert dialog. is there any way of doing this?? Here is the code for the alert dialog. I just want the program to wait until the user selects the option..

String state = Environment.getExternalStorageState();
    if (state.equalsIgnoreCase("mounted"))
    {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("The SD Card has been removed from your device. Please re-insert the SD card and try again")
       .setCancelable(false)
       .setPositiveButton("Retry", new DialogInterface.OnClickListener() {
           @Override
           public void onClick(DialogInterface dialog, int id) 

           {

              onRecreate();

           }
       })
       .setNegativeButton("Exit", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) 
           {
               dialog.cancel();
             //  onDestroy();
               finish(); 
           }
       })

       .setTitle("No SD-card Found")
       .setIcon(R.drawable.alert_dialog_icon_m);
        AlertDialog alert = builder.create();
        alert.show();   

    return 0;
    }//IF condition closes   
    else
    return 1;

Answer 1

Simply don’t do anything until the user presses one of the dialog’s buttons. Since there is not much you can do if the SD card is not mounted, just have a ‘Please mount SD card to continue’ and an ‘OK’ button that finish()-es the activity.