如何使PopupWindow在不忽略背景触摸的情况下仍然能够在其TextView中输入文本

import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.PopupWindow;
import android.widget.TextView;

public class PopupWindowExample {

    public void showPopupWindow(Activity activity) {
        // 加载布局文件
        View popupView = LayoutInflater.from(activity).inflate(R.layout.popup_layout, null);

        // 创建PopupWindow实例
        PopupWindow popupWindow = new PopupWindow(
                popupView,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT,
                true);

        // 设置背景为透明，并允许外部触摸
        popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        popupWindow.setOutsideTouchable(true);

        // 设置PopupWindow显示位置
        popupWindow.showAtLocation(activity.getWindow().getDecorView(), Gravity.CENTER, 0, 0);

        // 获取TextView并设置焦点和输入法显示
        TextView textView = popupView.findViewById(R.id.textView);
        textView.setFocusable(true);
        textView.setFocusableInTouchMode(true);
        textView.requestFocus();

        // 显示输入法
        InputMethodManager imm = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
        imm.showSoftInput(textView, InputMethodManager.SHOW_IMPLICIT);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="16dp">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter text here" />
</LinearLayout>