安卓开发PopupWindow控件

java

package com.example.learn;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;

import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.PopupWindow;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "leo";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



    }
    public void leoClick(View view){
    View popupView=getLayoutInflater().inflate(R.layout.popup,null);
    Button btn1=popupView.findViewById(R.id.btn1);
    Button btn2=popupView.findViewById(R.id.btn2);
        PopupWindow popupWindow=new PopupWindow(popupView, ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT,true);
        popupWindow.setBackgroundDrawable(getResources().getDrawable(R.drawable.moon));
        popupWindow.showAsDropDown(view);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.e(TAG, "onClick: 你住在上海吗" );
                popupWindow.dismiss();
            }
        });
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.e(TAG, "onClick: 你住在安徽吗" );
            popupWindow.dismiss();
            }
        });
    }


}

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">

   <Button
       android:text="弹出PopupWindow"
       android:onClick="leoClick"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"/>



</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@mipmap/ic_launcher"
    android:orientation="vertical"
    >
    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#ff0000"
        android:text="上海"
        android:textSize="18sp"
        />
    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#02FADD"
        android:text="安徽"
        android:textSize="18sp"
        />
</LinearLayout>

结果图