Full Screen Dialog

void showDialogOfMsg()
{
    Dialog dialog = new Dialog(getActivity());
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialog.setContentView(R.layout.dialog_of_msg_list);

    int width = getActivity().getWindowManager().getDefaultDisplay().getWidth();
    LinearLayout lay = (LinearLayout)dialog.findViewById(R.id.lay);

    ViewGroup.LayoutParams params = lay.getLayoutParams();
    params.width = width;
    lay.setLayoutParams(params);

dialog.show();   


}





other way


  Window window = introDialog.getWindow();
            DisplayMetrics displaymetrics = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
            int widthContentView = displaymetrics.widthPixels - 5;
            int heightContentView = displaymetrics.heightPixels - 10;
            window.setLayout(widthContentView , heightContentView);