如何设置 AlertDialog.builder 全屏

今天，想实现一个 AlertDialog 沾满全屏的

final AlertDialog dialog = new AlertDialog.Builder(activity).create();dialog.show();  1  这里必须先设置

//2 TODO 自定义View
View dialogView = inflater.inflate(R.layout.dialog_gps_layout, null, false);
View divider = dialogView.findViewById(R.id.divider1);RelativeLayout cancelRL = (RelativeLayout) dialogView
        .findViewById(R.id.cancel_rl);RelativeLayout comfirmRL = (RelativeLayout) dialogView
        .findViewById(R.id.confirm_rl);TextView tvTitle = (TextView) dialogView
        .findViewById(R.id.dialog_title);TextView tvMessage = (TextView) dialogView
        .findViewById(R.id.warning_words);TextView tvConfirm = (TextView) dialogView.findViewById(R.id.confirm);
if (title == null || "".equals(title)) {
    tvTitle.setVisibility(View.GONE);} else {
    tvTitle.setText(title);}
tvMessage.setText(message);tvMessage.setGravity(Gravity.CENTER);cancelRL.setVisibility(View.GONE);
if(set_button_green){
    tvConfirm.setTextColor(activity.getResources().getColor(R.color.primary_color));}else{
    tvConfirm.setTextColor(activity.getResources().getColor(mConfirmBtnColor));}
tvConfirm.setText(confirmBtnText);

//3  设置View 的尺寸WindowManager windowManager = activity.getWindowManager();Display display = windowManager.getDefaultDisplay();WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();lp.width = (int)(display.getWidth());lp.height = (int)(display.getHeight());dialog.getWindow().setAttributes(lp);

//4  设置View dialog.getWindow().setContentView(dialogView);

这种方案可以解决 全屏的显示。