Android开发-- 简单对话框

 final Builder builder = new AlertDialog.Builder(this);
 builder.setIcon(R.drawable.appicns_folder_smart);
 builder.setTitle("Normal Dialog");
 builder.setMessage("A simple dialog");
 builder.setPositiveButton("OK", new OnClickListener() {

     @Override
     public void onClick(DialogInterface arg0, int arg1) {
         toast.setText("User has clicked OK button.");
         toast.show();
         }
     });

     builder.setNegativeButton("Cancel", new OnClickListener() {

     @Override
     public void onClick(DialogInterface arg0, int arg1) {
         toast.setText("User has clicked Cancel button.");
         toast.show();
         }
     });
 builder.create().show();