android Messagebox

android Messagebox doesn't show because of finish call, how to make this function wait for ok and then close

public void msbox(String str,String str2)
{
    AlertDialog.Builder dlgAlert  = new AlertDialog.Builder(this);                      
    dlgAlert.setMessage(str2);
    dlgAlert.setTitle(str);              
    dlgAlert.setPositiveButton("OK", null);
    dlgAlert.setCancelable(true);
    dlgAlert.create().show();
    finish(); 
}

should be like this

public void msbox(String str,String str2)
{
    AlertDialog.Bu开发者_如何学JAVAilder dlgAlert  = new AlertDialog.Builder(this);                      
    dlgAlert.setTitle(str); 
    dlgAlert.setMessage(str2); 
    dlgAlert.setPositiveButton("OK",new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
             finish(); 
        }
   });
    dlgAlert.setCancelable(true);
    dlgAlert.create().show();
}

see SO question: AlertDialog doesn't wait for input

you will have to implement callback (OnClickListener) when user clicks OK on AlertDialog.

This all because Android dialog boxes are not modal (non-blocking invoker thread)

dlgAlert.setPositiveButton("OK",new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int whichButton) {
        // call your code here
    }
});

If you want to create a dialog box(Message Box,named in c#,vb.net etc) in android programming then just copy this code and paste it in the click event of any button where you need it.

AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder
    .setTitle("Deleting a Contact No")
    .setMessage("Are you sure?")
    .setIcon(android.R.drawable.ic_dialog_alert)
    .setPositiveButton("Yes", new DialogInterface.OnClickListener() 
    {
        public void onClick(DialogInterface dialog, int which) 
        {       
               //do some thing here which you need
    }
    });             
    builder.setNegativeButton("No", new DialogInterface.OnClickListener() 
    {
        public void onClick(DialogInterface dialog, int which) 
        {   
        dialog.dismiss();           
        }
    });         
AlertDialog alert = builder.create();
        alert.show();